Article
Nanoscience & Nanotechnology
Nan Liu, Yi Cao, Yin-Lian Zhu, Yu-Jia Wang, Yun-Long Tang, Bo Wu, Min-Jie Zou, Yan-Peng Feng, Xiu-Liang Ma
Summary: The study presents a self-assembled uniform biphasic system as a potential stable and enduring RRAM medium, demonstrating advantages in stability, uniformity, and durability for further application in RRAM devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Jonas Weber, Yue Yuan, Fabian Kuehnel, Christoph Metzke, Josef Schaetz, Werner Frammelsberger, Guenther Benstetter, Mario Lanza
Summary: Conductive atomic force microscopy (CAFM) is a powerful technique for studying electrical and mechanical properties at the nanoscale. The reliability of probe tips is a major challenge in CAFM, and solid Pt probes offer a more durable and reliable alternative to metal-coated silicon tips. The use of solid Pt probes can enhance the reliability of CAFM experiments by providing similar performance in terms of lateral resolution and a longer lifetime.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Xiaoli Huang, Haojie Lai, Junjie Liu, Qiulan Chen, Weiguang Xie
Summary: The contact characteristic and intrinsic conductivity of single MoO2 nanosheet grown by CVD method were investigated. It was found that the contact of Ag with MoO2 was better than that of Au. The measured intrinsic conductivity of MoO2 at low bias condition is as high as (2.5 +/- 1.3) x 104 S/cm. Non-linear behavior in IV characteristic and breakdown behavior were observed with increasing bias due to the contact effect. The supported current density is around 107 A/cm2, indicating that MoO2 is a superior conductive transition metal oxide material for low-voltage applications.
Article
Materials Science, Paper & Wood
Jianhua Ma, Haihong Pu, Pengxin He, Qiangli Zhao, Shaoxue Pan, Yaowu Wang, Chen Wang
Summary: Mechanically strong and highly conductive cellulose/carbon nanotube (CNT) composite fibers were successfully spun using an aqueous alkaline/urea solution, showing excellent mechanical strength and high electrical conductivity for applications in joule heating and humidity measurement.
Article
Physics, Applied
L. Richarz, J. He, U. Ludacka, E. Bourret, Z. Yan, A. T. J. van Helvoort, D. Meier
Summary: In this study, moire fringes observed in conductive atomic force microscopy (cAFM) scans obtained on the ferroelectric material Er(Mn,Ti)O-3 were investigated. It was found that these fringes are a result of scanning moire effect, arising from the superposition of raster scanning and sample-intrinsic properties. The findings are important for studying local transport phenomena in moire engineered materials by cAFM and provide a general guideline for distinguishing extrinsic from intrinsic moire effects.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Biyao Cheng, Shuming Yang, Wei Li, Shi Li, Shareen Shafique, Dong Wu, Shengyun Ji, Yu Sun, Zhuangde Jiang
Summary: This study introduces a simple method for selectively fabricating a single carbon nanotube on an atomic force microscopy (AFM) tip, with a yield rate of over 93%. The resulting carbon nanotube probes are suitable in length and can be used to scan complex nanostructures with high aspect ratios, providing a solution to the long-standing problem of mapping such structures.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Divya Verma, Himanshu Rai, Nitya Nand Gosvami, Viswanath Balakrishnan
Summary: This work investigates the role of alumina coating on the frictional behavior of vertically aligned carbon nanotube forests sliding against alumina microspheres. The alumina coating significantly reduces the coefficient of friction by changing the contact area and lateral stiffness.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Saima A. Sumaiya, Jun Liu, Mehmet Z. Baykara
Summary: The atomic-scale structure and properties of material surfaces play a significant role in various chemical and mechanical phenomena. However, current methods for characterizing surfaces at the atomic level are limited by the need for strict environmental conditions. This study presents a new approach utilizing conductive atomic force microscopy (C-AFM) to achieve atomic-resolution surface imaging under ambient conditions. The results demonstrate the capability of this method to manipulate and observe surface structure and electronics in real time, with wide-ranging applicability.
Article
Nanoscience & Nanotechnology
Heather G. Wise, Hidemasa Takana, Anthony B. Dichiara
Summary: The continuous flow assembly of colloidal nanoparticles from aqueous suspensions into macroscopic materials using a field-assisted double flow focusing system allows the integration of renewable cellulose nanofibrils (CNFs) with single-walled carbon nanotubes (SWNTs) to produce high-performance functional filament nanocomposites. The nanoscale orientational anisotropy of the CNFs and SWNTs is achieved by an alternating electric field and extensional sheath flows. The resulting macroscopic filaments exhibit improved mechanical, electrical, and liquid sensing properties, showing promise for environmentally friendly and scalable manufacturing of multifunctional fibers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Engineering, Electrical & Electronic
Tao Yan, Yuting Wu, Wen Yi, Zhijuan Pan
Summary: This paper introduces the structure, preparation methods, sensing performance, working mechanism, and application fields of flexible resistive-type strain sensors, while also discussing the challenges and future research directions.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Multidisciplinary
Ekaterina Kosareva, Radmir Gainutdinov, Anna Nikolskaia, Alla N. N. Pivkina, Nikita V. V. Muravyev
Summary: Vaporization is an important aspect of studying energetic materials, and atomic force microscopy (AFM) offers a unique method to track particle volume changes under heating. However, nanoscale structural effects can interfere with sublimation mass loss. This study provides a comprehensive investigation of the sublimation of pentaerythritol tetranitrate (PETN) thin films, considering various measurement parameters, heating techniques, sample compositions, and substrate types. AFM allows precise nanoscale vaporization experiments and can provide reliable estimates of sublimation enthalpy, but sample morphology and concurrent structural transformations should be considered for valid results.
Article
Microscopy
Li Zhao, Xiaowei Du, Bin Fang, Qiyuan Liu, Hui Yang, Fangzuo Li, Yaohuan Sheng, Xiangfu Zeng, Haijian Zhong, Weidong Zhao
Summary: Breast cancer, a common malignant cancer in women, remains poorly understood in terms of its pathogenesis. This study utilized Conductive Atomic Force Microscopy (CAFM) to investigate the electrical conductivity and electron transport of normal and cancer breast cells. It was found that cancer cells exhibited better electrical conductivity compared to normal cells, suggesting the potential for distinguishing cancer cells and advancing further research in this field.
Article
Chemistry, Multidisciplinary
Dusan Vobornik, Maohui Chen, Shan Zou, Gregory P. P. Lopinski
Summary: This study identifies two issues that can impact the accuracy of AFM measurements of single-wall carbon nanotubes' diameter. The proposed protocol effectively reduces errors associated with these issues. An analysis method is developed to minimize uncertainties in the extraction of diameters from measured images. The method is successfully applied to measure the diameter distribution of individual highly semiconducting enriched nanotubes in networks.
Article
Nanoscience & Nanotechnology
Keivan Asadi, Junghoon Yeom, Hanna Cho
Summary: Investigating internal resonance (IR) mechanisms in micro/nanoresonators reveals that intermodal coupling between second and third flexural modes in asymmetric structures provides an optimal condition for strong IR, with high energy transfer to the resonated mode. This study introduces design strategies that can be easily integrated into typical micro/nanoelectromechanical systems, offering potential for paradigm-shifting applications in micro/nanosystems.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Spectroscopy
Sara Seweryn, Katarzyna Skirlinska-Nosek, Kamila Sofinska, Konrad Szajna, Jan Kobierski, Kamil Awsiuk, Marek Szymonski, Ewelina Lipiec
Summary: This work focuses on optimizing the TERS technique for efficient DNA measurements by preparing atomically-flat gold substrates, depositing DNA without fixatives, and optimizing TERS probe preparation. Through comprehensive comparison of different probes, reliable and reproducible TER spectra of DNA are obtained, providing a foundation for further research on DNA and its interaction with other biomolecules.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Christian Weymann, Celine Lichtensteiger, Stephanie Fernandez-Pena, Kumara Cordero-Edwards, Patrycja Paruch
APPLIED SURFACE SCIENCE
(2020)
Article
Physics, Multidisciplinary
Philippe Tuckmantel, Iaroslav Gaponenko, Nirvana Caballero, Joshua C. Agar, Lane W. Martin, Thierry Giamarchi, Patrycja Paruch
Summary: Research on ferroelectric materials shows that distinguishing between creep and depinning regimes is crucial for altering power-law scaling exponent values. High tip bias significantly affects the statistics of switching events.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Guillaume Rapin, Nirvana Caballero, Iaroslav Gaponenko, Benedikt Ziegler, Audrey Rawleigh, Ermanno Moriggi, Thierry Giamarchi, Steven A. Brown, Patrycja Paruch
Summary: Cell-cell interactions play a crucial role in both normal tissue development and tumor invasion, affecting the geometry and dynamics of biological interfaces. Pharmacological modulation significantly influences the proliferation speed and roughness evolution of cell fronts. Interactions at different cell length scales exhibit distinct hierarchies of effects on cell front roughness.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Condensed Matter
S. Bustingorry, J. Guyonnet, P. Paruch, E. Agoritsas
Summary: The study finds that self-affine rough interfaces in experimental systems possess characteristic scaling properties, and the measurement of roughness parameters should consider sample-to-sample fluctuations. Therefore, ensuring a sufficient number of independent interface realizations is crucial, as this issue is often overlooked.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Microscopy
Loic Musy, Ralph Bulanadi, Iaroslav Gaponenko, Patrycja Paruch
Summary: Research in materials science relies on correlation of information from various techniques, and efficient methods to process and store complex datasets are crucial. Hystorian is a generic materials science data analysis Python package aimed at improving data processing traceability and archival ability, converting proprietary data formats into open formats and facilitating management of multiple data types.
Article
Physics, Applied
Guillaume Rapin, Sophia Ehrensperger, Cedric Blaser, Nirvana Caballero, Patrycja Paruch
Summary: Understanding and controlling the motion, stability, and equilibrium configuration of ferroelectric domain walls is crucial for their integration into potential nanoelectronic applications like ferroelectric racetrack memories. Experimental results show that domain walls can be described as one-dimensional elastic interfaces, but an increase in roughness is observed as they move through disorder landscapes, potentially limiting the use of ferroelectrics in racetrack-type memories.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Iaroslav Gaponenko, Guillaume Rohat, Stephane Goyette, Patrycja Paruch, Jerome Kasparian
Summary: Describing the spatial velocity of climate change is crucial for assessing the challenges faced by systems to keep up with its pace. The MATCH method provides detailed velocity patterns at regional scales, allowing for comparisons between models and analysis of local features. The trajectories obtained are less sensitive to inter-annual fluctuations, enabling the introduction of a trajectory regularity index for quantitative perspectives on climate sinks and sources.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Iaroslav Gaponenko, Salia Cherifi-Hertel, Ulises Acevedo-Salas, Nazanin Bassiri-Gharb, Patrycja Paruch
Summary: The different nature of characterization methods for functional materials at the nanoscale has limited the correlation between them. This study proposes a fast and unbiased analysis method for heterogeneous spatial data sets by combining data stacking, distortion correction, and machine learning, enabling quantitative correlative multi-technique studies of functional materials.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Iaroslav Gaponenko, Loiec Musy, Neus Domingo, Nicolas Stucki, Albert Verdaguer, Nazanin Bassiri-Gharb, Patrycja Paruch
Summary: This study systematically investigated the effects of relative humidity and polarisation switching history on surface charge dissipation in ferroelectric Pb(Zr0.2Ti0.8)O-3 thin films, employing the framework of physically constrained unsupervised machine learning matrix factorisation, Dictionary Learning. The analysis revealed a complex interplay of voltage-mediated physical processes underlying the observed signal decays, with additional insight provided by a Fitzhugh-Nagumo reaction-diffusion model.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Celine Lichtensteiger, Marios Hadjimichael, Edoardo Zatterin, Chia-Ping Su, Iaroslav Gaponenko, Ludovica Tovaglieri, Patrycja Paruch, Alexandre Gloter, Jean-Marc Triscone
Summary: We investigate the ferroelastic/ferroelectric domain structure in PbTiO3 epitaxially strained on (110)(o)-oriented DyScO3 substrates. The anisotropic strain created by the orthorhombic substrate results in an asymmetry in the domain configuration, with domain walls aligned along one of the two in-plane directions. The periodicity of the film thickness deviates from the Kittel law, and the domain configuration transitions from flux-closure to a/c-phase as the thickness increases, forming larger superdomains.
Article
Physics, Multidisciplinary
G. Gatti, J. Issing, L. Rademaker, F. Margot, T. A. De Jong, S. J. van der Molen, J. Teyssier, T. K. Kim, M. D. Watson, C. Cacho, P. Dudin, J. Avila, K. Cordero Edwards, P. Paruch, N. Ubrig, I. Gutierrez-Lezama, A. F. Morpurgo, A. Tamai, F. Baumberger
Summary: Researchers used real- and momentum-space mapping techniques to study moire superlattice effects in twisted WSe2, revealing a split-off flat band from monolayer Γ states and quantifying the moire potential directly. They demonstrated that the global valence band maximum and the flat band derived from monolayer K states are close in energy, but with weaker superlattice effects. These findings constrain theoretical models and suggest the involvement of Γ-valley flat bands in the correlated physics of twisted WSe2.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Tamsin O'Reilly, Kristina M. Holsgrove, Xinqiao Zhang, John J. R. Scott, Iaro Gaponenko, Praveen Kumar, Joshua Agar, Patrycja Paruch, Miryam Arredondo
Summary: This study investigates the temperature-induced domain behavior of ferroelectric-ferroelastic domains in free-standing BaTiO3 films under different gas environments through in situ scanning transmission electron microscopy (STEM). An automated pathway for statistically disentangling and detecting domain structure transformations using deep autoencoders is established, enabling real-time analysis. The results show significant differences in temperature and domain behavior between various environments, with a peculiar domain reconfiguration at low temperatures. In situ gas and heating STEM provide a direct visualization tool to investigate the influence of external variables on oxide surfaces, offering valuable insights into surface-screening mechanisms in ferroelectrics.
Article
Materials Science, Multidisciplinary
Christian Weymann, Salia Cherifi-Hertel, Celine Lichtensteiger, Iaroslav Gaponenko, Kokou Dodzi Dorkenoo, Aaron B. Naden, Patrycja Paruch
Summary: This study investigates the domain wall properties of ferroelectric materials using three complementary techniques. It reveals the Neel character of 180 degrees domain walls and explores the relationship between domain density variations and underlying defect potential.
Article
Nanoscience & Nanotechnology
Christian Weymann, Celine Lichtensteiger, Stephanie Fernandez-Pena, Aaron B. Naden, Liv R. Dedon, Lane W. Martin, Jean-Marc Triscone, Patrycja Paruch
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Neus Domingo, Iaroslav Gaponenko, Kumara Cordero-Edwards, Nicolas Stucki, Virginia Perez-Dieste, Carlos Escudero, Elzbieta Pach, Albert Verdaguer, Patrycja Paruch