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Park AFM奨学金プログラム

将来を担うリーダーへの奨学金

パーク・システムズは、AFMシステムを含むナノスケール研究用科学機器のトップメーカーです。私たちは、若手研究者が可能な限り自由に研究成果を共有し、議論することを奨励することで、ナノ科学の次世代を担う先駆者を支援することを目指しています。
ナノスケール研究に携わる大学院生または博士研究員なら、どなたでもパーク・システムの奨学金に応募できます。
Park Systems 原子間力顕微鏡（AFM）を使って行われた研究をナノサイエンスコミュニティの他の人々と共有すPark AFM奨学生に、最高USD500の奨学金を授与します。授与される奨学金の総額は、提案された研究発表の質と発表会場を考慮した審査員の評価によって決まります。

奨学金支給要件

受賞者は、研究にPark AFM装置を使用することを実証した大学院生または博士研究員とする。
応募者は、Park AFM装置を使用して取得した有意義なデータ（応募時および論文中に使用したモデル名を明記してください）、論文を発表する予定のイベントまたは学会、論文が投稿済みまたは投稿予定の科学雑誌または出版物の記載をお願いいたします。
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Park AFM 奨学金受賞者に関する記事一覧

Park AFM Scholarship Awards – Jori Schmidt

Jori Schmidt is currently enrolled as a master’s student at the Technische Universitat Dresden, where he also received his BSc. Degree in the group of Prof. Lukas M. Eng. The title of the thesis was “Towards 3D magnetic force microscopy”, where he used the NX10 AFM by Park Systems to experiment with a new way of performing lateral MFM measurements. Currently, he is continuing his investigations into magnetic domain imaging. 1. Please summarize the research you do and explain why it is significant? I have performed magnetic force microscopy and shown that using a custom tip-holder, it is possible to use a torsional cantilever oscillation to image in-plane magnetic field components. This signal is sensitive to the in-plane directions of the magnetic stray field and can therefore provide more information about it. It was even possible to simultaneously record a conventional MFM signal at the same time by exciting the cantilever in both its flexural and torsional modes simultaneously. 2. How might your research be used? One goal would be to better understand the nature of more complicated magnetic structures, such as skyrmions and antiskyrmions. 3. Why is the Park AFM important for your research? It makes it easy to experiment with new imaging modes due to its flexible IO and software. The conventional MFM imaging mode works very well and is a great foundation to build upon. 4. What features of Park AFM are the most beneficial and why? The IO module which lets the user get access to all signals of the AFM and allows external control of some functions made implementation of the new imaging mode very easy. Via the aux-inputs, external signals can be read in as a custom data channel which is very helpful. In the software, the options to change parameters during the second pass (such as turning off the NCM drive) also proved useful.

Park AFM Scholarship Awards – Simon Salleh Atri

Simon Salleh Atri is a PhD student at the Tel Aviv University, Faculty of Exact Sciences, where he also achieved his bachelor’s (2016-2019) and master’s (2019-2021) degree in physics. As a Laboratory and Research Assistant to Dr. Moshe Ben Shalom, he focused on polarization in graphene polytypes and Electrical-induced stack switching in MoS2 and graphene polytypes. His current research is aimed at the study of the unique properties that arise when Van der Walls layered materials are stacked into different polytypes (recently called Van der Walls Polytypes) and why this occurs. 1. Please summarize the research you do and explain why it is significant? Multi-layer graphene can be stacked in different polytypes, each with unique properties as shown in trilayer rhombohedral graphene, where orbital-magnetism and superconductivity were found. In the four-layer case, there are three possible polytypes, Bernal (ABAB), Rhombohedral (ABCA), and ABCB, from which only the latter has a polar axis and a non-centrosymmetric unit cell, the necessary conditions for the existence of electrical polarization. In this project we show that electrical polarization indeed arises in this polytype, study its behavior under electrostatic doping, and use theoretical tools to understand its source. Contrary to other ferroelectric and polar materials, this multilayer is composed of only one kind of atom (Carbon), thus the study of electrical polarization here helps to understand fundamentally the existence of polarization and the spatial distribution of electrons within the crystal (or why would polarization arise in such a system). Additionally, we observe for the first time that the addition of charge carriers (holes in this case) increases the value of the polarization rather than decreasing it, as would be normally expected. 2. How might your research be used? My research focuses mainly on the fundamental properties of the different polytypes of multi-layer graphene. Understanding why the properties change and how electron correlations depend on the crystal stacking is important in terms of fundamental physics. Additionally, learning how to switch between polytypes is appealing from a technological point of view, since it will allow one to choose a desired property just by switching the stack of the multilayer. 3. Why is the Park AFM important for your research? Two-dimensional layered materials have by definition a very small thickness compared to their spanning area; Park AFM becomes a natural tool for their study since it allows one to measure different quantities over the sample area, including, topography, piezo, magnetic, and electrostatic response. When studying Van der Walls polytypes, apart from learning how those properties change with the stacking sequence, measuring and mapping those quantities helps us to characterize and understand which polytype we are dealing with before further studies, it is then an essential step in our research. 4. What features of Park AFM are the most beneficial and why? We work with NX10 and the HIVAC system: - User-friendly interface that allows scanning in a fast way - Versatility: it is easy to change the operating mode, and there are many to choose - Real non-contact mode: Allows longer tip life and avoids damaging the sample, which is very important for us when dealing with quasi-equilibrium polytypes that can disappear with contact or tapping mode - Sideband KPFM: allows high spatial resolution and a low noise KP signal, which was essential to measure the electrical polarization of ABCB graphene, it allowed us to see a 3 mV step between polytypes - Working in a high vacuum with HIVAC is essential to measure electrostatic properties in our materials.

Park AFM Scholarship Awards – Dr Zakhar Kudrynskyi

Dr Zakhar Kudrynskyi is a Research Fellow at the Faculty of Engineering, the University of Nottingham, UK. He studied at Chernivtsi National University in Ukraine where he graduated with first-class honours in Computer Engineering in 2010. Following that, he obtained his PhD in Physics of Semiconductors and Dielectrics at the Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Chernivtsi, Ukraine, in 2014. After his PhD, Dr Kudrynskyi worked abroad and in the School of Physics and Astronomy at the University of Nottingham, UK. In 2020 he joined the Advanced Materials Research group in the Faculty of Engineering at Nottingham. Currently, his main interests involve the science and technologies of innovative thin-film coating materials for electrical machines, power electronics, aerospace and renewable energy sectors. 1. Please summarize the research you do and explain why it is significant. My current research is focused on the development of a novel class of high-performance, purely inorganic, electrically insulating materials designed using the concept of multi-layered thin films. These materials exploit the high thermal conductivity and dielectric strength of selected ceramic compounds, such as metal nitrides, to deliver a step change in the existing electrical and thermal limits in operational conditions: namely permitting continuous operation with high thermal conductivity at high temperatures ≥ 600°C and voltages ≥ 1.5 kV AC/DC, far beyond the capabilities of any existing electrical insulation. 2. How might your research be used? This research aims to develop a radical innovation in electrification technologies previously infeasible with present electrically insulating coatings and manufacturing methods. My long-term ambition is to bring these coating materials from laboratories to everyday use, where they can really make a difference in a wide range of technologies, e.g., renewable energy, electric vehicles, hybrid aircraft (hydrogen/fully electric), industrial drives, robotics, low-carbon maritime and rail, offering innovative solutions to global challenges. This will be a vital step towards replacing fossil fuels with renewable powers to manage climate change and aligns with the UK government's ambitious target to reduce all greenhouse gas emissions to net-zero by 2050. 3. Why is the Park AFM important for your research? The Park Systems NX20 large sample AFM equipped with high voltage tool kit and temperature controlled stage has been used in this research. This Park AFM enables different types of characterization of the surface of the ceramic thin films including: i) topographical characterization of the surface; ii) conductive atomic force microscopy measurements of leakage current and breakdown voltage at nanoscale; iii) determination of nanomechanical properties. The system offers a unique opportunity to combine all these measurements within a single piece of equipment and enables a significant acceleration of experimental measurements and high reproducibility of the obtained results. 4. What features of Park AFM are the most beneficial and why? The NX20 is a state-of-the-art AFM combining unprecedented ease of use with a whole range of advanced imaging modes built into a single software package. The low-noise high-voltage amplifier and high temperature tool kit are key to this research project which studies high dielectric breakdown field strength of magnetron sputtered AlN thin films. In particular, the temperature-controlled stage enables to conduct measurements in a wide temperature range, namely from ambient temperature to 250 °C. The low-noise high-voltage amplifier for NX enables the application of high voltage bias up to ±150V (20x amplification ratio) to the samples. The unique capability to perform high voltage dielectric breakdown measurements whilst heating the sample up to 250°C makes it a perfect tool for investigation of thin-film samples for the most demanding applications.

Park AFM Scholarship Awards – Valerio Levati

Valerio Levati is a Ph.D. student at the Physics Department of Politecnico di Milano. He received both his B.Sc. and M.Sc. in Engineering Physics from the same university, where he then joined the PhyND group led by Prof. Daniela Petti and Prof. Edoardo Albisetti. His current research project deals with advanced nanofabrication for spintronics and nanoelectronics, aiming at developing innovative methods for crafting the physical properties of nanostructured materials by means of Phase Nanoengineering. 1. Please summarize the research you do and explain why it is significant. My research is focused on tailoring the physical properties of quantum materials and artificial nanostructures by inducing local tunable modifications on low dimensional systems through unconventional lithographic techniques, such as Direct Laser Writing (DLW) and thermal Scanning Probe Lithography (tSPL). This approach, called Phase Nanoengineering, has emerged as an effective method for crafting point-by-point the structure and composition of condensed matter systems, with application in nanoelectronics, spintronics and optics. 2. How might your research be used? Controlling the electronic, magnetic, and optical properties at the nanoscale plays a crucial role in discovering novel effects, engineering complex functionalities, and developing next-generation devices. In this framework, the unique capability of Phase Nanoengineering goes beyond standard lithographic processes, which just rely on material addition or removal. It can be used to directly pattern periodic or grayscale metamaterials, such as magnonic or photonic crystals, and to realize the building blocks of innovative circuits for applications in nanoelectronics. 3. Why is the Park AFM important for your research? Since my research deals with nanostructures and their physical properties, a high-precision instrument to characterize the produced patterns at the nanoscale is necessary. In this regard, the Atomic Force Microscope Park NX10 turned out to be a great ally, providing user-friendly operation and precise measurements of different physical quantities. 4. What features of Park AFM are the most beneficial and why? Among the characteristics of Park NX10 I like the most there are the fast set up, in fact you can place your sample on the stage and start measuring in a short time; the open access to different data regarding the measurement and the analysis; and the easy and flexible switching between different SPM configurations.

Park AFM Scholarship Awards – Felix Pertl

Felix Pertl was born and raised in Austria. He obtained a master’s degree in physics with a major in surface science and semiconductor physics from TU Graz, Austria. Now he moved to Vienna to pursue his Ph.D. at IST Austria. After 3 successful rotation projects spanning from quantum dots, superconductivity to contact electrification (CE), he joined the soft matter and complex materials group of Scott Waitukaitis. His research focuses on studying contact electrification with Kelvin Probe Force Microscopy. Outside the lab, he likes to play tennis, skiing, and hiking. 1. Please summarize the research you do and explain why it is significant. Everyone has experienced walking across a rug and then being shocked when they touch a metallic surface. The transfer of charge that occurs with the rug is known as contact electrification (CE). Although CE is a ubiquitous and widely studied phenomenon, it is poorly understood. I study the patterns of charge that appear on a surface after CE using Kelvin Probe Force Microscopy. These insights at the nanoscale promise to shed light on this universal yet puzzling phenomenon. 2. How might your research be used? Recently, I have developed a rigorous technique for how to convert KPFM potential maps into charge density maps. Previously, KPFM with insulators had mostly reported just the potential or extracted charge in an ad hoc way. With my technique, we can now quantitatively do CE experiments at the nanoscale. 3. Why is the Park AFM important for your research? The workhorse driving my entire research project is the NX20. Without this device, we could not even dream of measuring the quantities we do. 4. What features of Park AFM are the most beneficial and why? The single-pass mode combined with Powerscript is extremely useful for me. Not only is single-pass mode twice as fast as double-pass mode, but it also allows to record the KPFM potential signal without a lift step and therefore at closer proximity to the surface. Powerscript allows me to schedule multiple measurements to study time-dependent discharging events, allowing me to catch my breath.

Park AFM Scholarship Awards – Israel Ibukun Olaniyan

Israel Ibukun Olaniyan is a Ph.D. candidate at the Free University of Berlin and Helmholtz Zentrum Berlin in Professor Catherine Dubourdieu’s group. Prior to starting his Ph.D., with the aid of the Egbe Omo Oduduwa scholarship, he obtained a BSc degree at Obafemi Awolowo University (Ile-Ife, Nigeria), where he received the award of the best-graduating student from the department of Physics in 2012. His first Msc degree was also obtained at Obafemi Awolowo University, and after receiving the Korean government student scholarship (KGSP), he got another MSc degree in Applied Physics at Daegu University, South Korea, in 2019. His present research focuses on “Ferroelectricity at the nanoscale on Silicon”. 1. Please summarize the research you do and explain why it is significant? Nanostructures are significant for the fundamental study of ferroelectricity and the scaling of integration density. In my research, I grow perovskite thin films on silicon and pattern them in a helium ion microscope to form nanopillars of sub 500 nm in diameter. As it is a nanoscale structure, the electrical polarisation pattern can be more complex than in a thin film. I investigate the emerging polarisation pattern and how it can change with the size of the pillars. I characterize the nanopillars with piezo force microscopy and advanced synchrotron techniques. 2. How might your research be used? From a technological point of view, the research has applications in nanoelectronics for non-volatile memory devices and electromechanical systems. From the theoretical point of view, the research can help further the knowledge about ferroelectric materials, such as the critical thickness of ferroelectric materials on silicon, and exploration of novel phenomena that can emerge due to reduced lateral size effect in ferroelectrics. 3. Why is the Park AFM important for your research? The Park AFM is important for my research because: 1. The optics and calibrated motorized XY stage allow easy navigation of the fabricated nanostructures. 2. I can use the Park AFM to obtain topographic information on the fabricated nanostructures by using the AFM non-contact mode. 3. Writing and reading of ferroelectric domains can be carried out with Piezoresponse Force Microscopy (PFM) mode. 4. The switching spectroscopy PFM mode allows for the determination of the coercive field and magnitude of the piezoresponse in the nanostructures. 4. What features of Park AFM are the most beneficial and why? The hardware and software are very user-friendly. It is easy to incorporate hardware for advanced modes with the Park AFM without complicated wirings.

Park AFM Scholarship Awards – Ekta Singh

Ekta Sing is currently a PhD student in experimental Physics in the TU Dresden and the Max Planck Institute for Chemical Physics of Solids where she is working on her research title: “Tuning the ferroelectric domain wall conductivity by uniaxial pressure”. Earlier in 2016, she received her bachelor’s degree in Science Honours in Physics (B.Sc.) in Gargi College, University of Delhi, India and continued her studies in the Indian Institute of Technology Roorkee where in 2018, she achieved her Master degree of Science. After the graduation, Ekta worked as a research intern in SBO lab IISER Pune, India where she was working on the project dedicated to the exfoliation of Phosphorene layers from bulk Phosphorus by liquid-phase exfoliation. In 2018, Ekta joined Slader/Quizlet company as a subject expert where she worked prior to her current position. 1.Please summarize the research you do and explain why it is significant? Electronics of today is limited by fabrication, it is stationary, and limited to 2D. Here, we have developed a method to create conductive sheets in a nonconductive matrix such as lithium niobate (LiNbO3) single crystals, whose industrial production is well established. These conductive sheets, formally known as conductive domain walls, have recently attracted considerable attention among the ferroelectric scientific community due to their unique topological, optical, and electronic properties, and their potential applications such as memory devices or re-writable circuitry. The electronic properties of domain walls can be purposely tuned and studied by the application of strain. However, in the past this approach was limited to lattice-mismatched growth of thin films on selected substrates. In this research, we have used uniaxial stress to control the directionality of domain wall conductivity in single crystal z-cut 5% MgO doped lithium niobate. To analyze this effect in-situ and at the nanoscale, we combine a piezo-driven stress cell with the Park Systems NX10 scanning probe microscope. This measurement is first of its kind and it provides fundamental insights to domain wall properties. 2. How might your research be used? Our research includes combining two different techniques such as strain technology and atomic force microscope (AFM) together. This technique opens new possibilities to understand nanoscale properties under extreme conditions such as strain. Even more, our work is also a steppingstone towards understanding the fundamental properties ofthe ferroelectric domain walls. 3. Why is the Park AFM important for your research? Park System NX10 AFM provides a large sample space for our stress cell to fit in. The stage can handle a weight of up to 100 g, which gives any user the freedom to combine many exciting measurements together with AFM. 4. What features of Park AFM are the most beneficial and why? Park AFM has an intuitive user interface, it is fast, it provides a possibility to control the system remotely and a lot of space to modify things according to a scientist's need.

Park AFM Scholarship Awards – Alyssa Miller

Alyssa Miller is currently enrolled in a PhD at the Department of Chemistry at the University of Cambridge, United Kingdom. Her PhD research work mainly focuses on the biophysics of neurodegenerative diseases. Alyssa received her master’s degree in Biochemistry from Queen Mary, University of London where she was a 1st class in a years 1,2,3 and was ranked 1st in Biochemistry Class of 2019, School of Biological and Chemical Sciences. Alyssa has a great lab experience. During her bachelor studies, she completed a laboratory-based project in electrophysiology under the supervision of Dr. Mark Baker. During her Master studies, she conducted a laboratory-based project in the field of Alzheimer’s Disease under the supervision of Dr. John Viles. And currently, Alyssa is working on the PhD project supervised by Prof. Michele Vendruscolo and Prof. Tuomas Knowles with a research aim to apply advanced atomic force microscopy methods to the study of protein aggregation and liquid-liquid phase separation. Alyssa has numerous publications and awards i.a. she is a recipient of Una Finlay PhD Scholarship, Emmanuel College Cambridge where she received ￡100,000 scholarship for research in Alzheimer’s Disease; 1. How might your research be used? While the study of protein self-assembly and aggregation using AFM is certainly not new, we are able to use the spray to uncover genuinely novel information on these complex processes. The ability to get quantitative, millisecond time-resolved information on fast-reacting species contributes to this. We are very excited about the spray deposition platform, as it can also be broadly applied to any surface-based technique. This includes spectroscopic (FTIR) measurements, where the ultra-fast drying minimises salt crystallisation and enables us to study biological samples in physiological-like buffer conditions. We have also developed a double inlet design, where we can mix our sample with stain in the microfluidic device, allowing for a single-step deposition for transmission electron microscopy. The spray platform is also suitable for many biological samples across a broad size range, from nanometer-scale protein monomers to larger lipid vesicles, all the way up to micron-scale bacteria. 2. Why is the Park AFM important for your research? The Park AFM has been central in my research, as it enables to study the morphology of protein aggregates with nanometer-scale resolution. Protein assemblies are notoriously difficult to study, due to their small size, typical low abundance in solution, and dynamic nature. AFM is thus very well-suited to capture localized structural properties. 3. What features of Park AFM are the most beneficial and why? The robust nature of the Park NX10 instrument makes it easy to achieve high-resolution images of few nanometer-sized protein structures, such as individual monomers. As we are often studying small changes between heterogenous samples, we need to take many images to ensure that we are accurately representing our biomolecules. The Park is very strong in this respect, as it can scan reliably for days with minimal user input. The phase-readout also allows us to monitor how ‘hard’ we are scanning our sample, meaning that we can gently image our soft biological samples without damaging them.

Park AFM Scholarship Awards – Dr. Gen Liu

Dr. Gen Liu Gen Liu received his B.S. and M.S. degrees from the Department of Science at Northeast University. Presently, he is a Ph.D candidate under supervision of Professor Lei Ma at Tianjin International Center for Nanoparticles and Nanosystems (TICNN), Tianjin University, P. R. China in 2017. His work mainly focuses on improving the technique of scanning electrochemical cell microscopy and its application in catalysis. 1. Please summarize the research you do and explain why it is significant.Scanning electrochemical cell microscope is the latest generation of scanning electrochemical microscopy technology. It is designed to record the morphology and electrochemical activity information of samples simultaneously, which can directly correlate their structure and chemical properties. However, more technological progress and innovations are needed to realize the routine operation for normal customer at this stage. In particular, there is a great challenge in stable high-resolution topographical imaging. To resolve these problems, we proposed an extremely customer-friend method to easily get a high-resolution SECCM image. This is an important leap to realize the non-special training request for common customer. 2. How might your research be used?The research included the high-resolution morphological test, accurate positioning test and repeatability test provide experimental evidence on the routine and commercial application of SECCM. Based on the described setup, the clear topographical and electrochemical activity information of ~45 nm gold nanoparticles self-assembly were recorded successfully. 3. Why is the Park AFM important for your research?The diameter of the probe used in the system is ~50 nm, which means a small signal need to be acquired at about a few pA level. It required a very high stability and sensitivity of the whole system. While, a slow probe approaching speed of 0.1 μm s-1 and a high resolution of 0.1 nm provided by the Park AFM system well meets these requirements. 4. What features of Park AFM are the most beneficial and why?As mentioned above, the very stable current controlling and extremely accurate Z-head motion of Park AFM can well guarantee the running of SECCM measurements. The features include a completely independent Z-direction displacement control, as slow as 0.1 μm s-1 approaching speed, and the less than 1.0 pA weak current detection capability. All of them make the routinely operating SECCM for mapping the nanoscopic surface chemical reaction in our research be possible.

Park AFM Scholarship Awards – Dr. Peisong Liu

Dr. Liu got his PhD degree in Polymer Chemistry and Physics in 2018 at Henan University. After that, he joined Soochow University as a Postdoctoral Fellow in Chemistry. Currently, he is a lecturer at Henan University. His research interests are in design and synthesis of hybrid nanomaterials (e.g. surface modified silica nanofluid, graphene oxide) and their application in the field of oilfield, thermal-insulation, and electronics. He has hosted six projects (three of them are provincial projects) and participated in more than 15 programs. Dr. Liu has published over 12 research papers as first author, including Advanced Materials, ACS Applied Materials and Interfaces, Applied Surface Science, and Chemical Engineering Science, among others. Moreover, he also applied for seven National Invention Patents, six of them have been transformed and sold to companies, the total revenue is more than 6 million RMB. In addition, he has participated in the revision of one Industry Standard and the formulation of three Enterprise Standards. He is now a member of the Chinese Chemical Society and a correspondent member of the National Technical Committee for Standardization of Rubber and Rubber Products (SAC/TC35/SC5). 1. Please summarize the research you do and explain why it is significant? My research focus on the synthesis of nanoparticles (e.g. silicon, metals) and their surface modifications, characterizations, as well as applications in the fields of oilfield, electronics. Nanoparticles is a class of material with a size of 100 nm, and have been widely used in various fields due to its quantum effect, unique chemical and electrical properties in a confined area. It brings us a large number of potential and advantages over micrometer-sized materials, and plays an important role in the technological advancement of modern society. 2. How might your research be used? With the shrinking of electronic devices, apart from the design of nanomaterials and nanosized device structures, the technologies that could examine the local mechanical and electrical properties/performance become more and more imperative. For example, in my work published in Advanced Materials recently, I take the advantages of atomic force microscopy (AFM) to characterize surface modified copper nanoparticles (CuNPs) with a size of ~5 nm, and built a conductive AFM probe/modified CuNPs/metal (MIM) structured nano-memristor. By a series of electrical measurements, we conclude that this nanosized device exhibits a record ultra-low switching voltage of ~4 mV, which paves the way to the development of memory devices with low power consumption. 3. Why is the Park AFM important for your research? Park AFM gives us to examine the nanoparticles with a high resolution under different imaging modes (i.e. Non-contact, Tapping, Contact mode), which could also help us to detect the tiny modifications occurred during the experiments. In my work, I mainly use the Park AFM to conduct electrical characterization of metal/insulator nanojunction in both ambient and vacuum. The Park AFM allows me to detect complete electrical characteristics at very low voltage range (10 mV) and obtain repetitive and stable data. 4. What features of Park AFM are the most beneficial and why? The feature of high vacuum (up to 10-6 torr) in the NX-Hivac Park AFM is one of the most critical functions in terms of electrical measurement, which can effectively avoid the effect of humidity (e.g. H2O) and oxygen in the electrical tests, e.g. local anodic oxidation, allowing the researchers to acquire accurate and reliable data. Moreover, Park AFM also exhibits slight drift during multiple scans, which will benefit the repeated scanning at a single location and easily locate a specific feature.

Park AFM Scholarship Awards – Peng Tan

Peng Tan Peng Tan received his B.S. (2019) in Chemistry from the Hainan Normal University and he is now pursuing a M.S. in Chemistry at Shenzhen University with an expected graduation date of June 2022. During his master in Shenzhen University, Mr. Peng Tan has studied and worked in the wearable flexible device team of Prof. Xuechang Zhou's research group at Shenzhen University, and received several awards, including Academic Scholarship for many times and the 7th China International "Internet+" Contest Guangdong Province Division- Bronze Award of Higher Education Master Circuit. He will continue to further study in Hong Kong Polytechnic University in September 2022. At present, His research focuses on the fabrication and application of self-adhesive conductive polymer composites. He has published 4 research articles in different journals (including Nature Communications, ACS Applied Electronic Materials, Soft Matter, etc.) and granted for 2 invention patents of China. 1. Please summarize the research you do and explain why it is significant.My current research focuses on the fabrication and application of self-adhesive conductive polymer composites. My research goal is to balance the electrical conductivity and Young's modulus of materials and tackle some key problems, such as poor adhesion strength and significant mechanical mismatch between biological tissue and the flexible material, which possibly cause the function failure of smart devices. Therefore, designing and developing novel self-adhesive conductive materials with outstanding properties is of significant value. 2. How might your research be used?In my work, a self-adhesive conductive polymer based on supramolecular interactions is designed and developed, which features many advantages, such as high interfacial adhesion, low modulus as well as high electrical conductivity. It is a promising material for bioelectrodes (i.e., for monitoring bioelectric signals of the human body) because it matches the mechanical modulus of skin tissue. The polymer can also be applied in integrated arrays of alternating current electroluminescence devices during muscle training to visualize the muscle’s electrical signals. This means that the development of the self-adhesive conductive polymer may be one possible solution to the problem of significant mechanical mismatch between biological tissue and the flexible material. Furthermore, the composite consists of water-soluble substances, and it can be fabricated into transparent electrodes and various kinds of circuit patterns, which has an advanced prospect in soft electronics. 3. Why is the Park AFM important for your research?This Park NX10 system is a practical and efficient test tool to characterize the physical properties of self-adhesive conductive polymer composites, and it can also be capable of gaining significant information such as the surface morphology, roughness as well as height of the composite, which can help us evaluate and analyze the influence of the concentration supramolecular solvent on the electrical properties of the polymer material. Hence, the AFM enables to help us better understand and optimize performance of self-adhesive conductive polymer materials, which is significant for my studies. 4. What features of Park AFM are the most beneficial and why?The true Non-Contact mode of Park NX10 AFM provides us with accurate and reliable topography of target samples without damaging the probe and modifying the sample surface. In addition, the data analysis software XEI matched with Park NX-10 AFM can be applied to collect and analyze the data of physical and structural characterization of self-adhesive conductive polymer composites in nano scale, and evaluate the parameters such as average height, diameter and surface roughness of conductive films.

Park AFM Scholarship Awards - Giorgio Cortelli

Giorgio Cortelli Giorgio Cortelli is currently a PhD student at the Department of Civil, Chemical, Environmental and Materials Engineering, XXXV Cycle, in the University of Bologna with a focus on Structural and Geotechnical Engineering studies. During his studies at Alma Mater Studiorum, University of Bologna, he conducted his thesis work on ”Micro-lever calibration for AFM and Force Spectroscopy applied to polymer nanofibers” at the AFM Laboratory of DIFA. In October 2017, he received his Bachelor´s Degree in Physics. Two years later, Giorgio earned his Master's Degree in Physics at the same university,with the master thesis on "Ultrafast Electron Diffraction on materials exposed to intense Free Electron Laser pulses," which was a result of the experimental activity carried out at the international research center Elettra-Sincrotrone Trieste. Currently, Giorgio’s research activity is concentrated on nanomechanical characterization of stretchable conductive surfaces 1.Please summarize the research you do and explain why it is significant? My research project focuses on nanomechanical characterization of stretchable conductive surfaces such as the double layer PDMS/Au. On one hand, I carry out experiments by means of AFM. Typical measurements are force spectroscopy, non-contact mode, conductive AFM and PinPointTM. On the other hand, I perform numerical simulation and modeling to figure out what are the main parameters that play a role in the experiments and how they are correlated. Stretchable conductors make electronics mechanically compliant with the human body. The mechanical and electrical characterization of stretchable conductors is crucial in order to develop stretchable electronics such as wearable or implantable sensors. Finding an interpretative and predictive model paves the way to systematic analysis and design of stretchable devices. 2. How might your research be used? We developed an AFM-based procedure supported by a linearized model to investigate the nanomechanics of PDMS/Au. We found that the interface between the two layers is diffused as the metallic particles permeate in the substrate during evaporation. From the stiffness-thickness curves we estimated the elastic modulus and the effective thickness of an ultrathin metallic film deposited on a polymeric substrate. This quantitative information about the effective thickness is crucial in the stretchable devices design as it is directly correlated to the bending stiffness of the stretchable conductors. Furthermore, this characterization method is of fundamental importance to study the system in its conditions of use, i.e. under strain. We are now focusing on correlating mechanical and electrical properties at different strains via the Conductive PinPointTM AFM. 3. Why is the Park AFM important for your research? Park AFM is a suitable tool for my research as it allows me to probe the local mechanical and electrical properties of my samples. The precision of positioning in the sample plane and of the measurement of the variations in heights, combined with a very thin tip, allow to investigate the formation of micro-cracks in the conductive thin film under the strain. This allows us to study how morphology and strain impact the electrical properties of the material. 4.What features of Park AFM are the most beneficial and why? I believe that the most beneficial feature of Park AFM is the Conductive PinPointTM Mode. This experimental technique makes it possible to map at high resolution and simultaneously mechanical and electrical properties of the sample. In this way it is possible to study the correlation. This is of crucial importance for developing materials that are mechanically stretchable and electrically conductive.