Review
Materials Science, Multidisciplinary
Knut W. Urban, Juri Barthel, Lothar Houben, Chun-Lin Jia, Lei Jin, Markus Lentzen, Shao-Bo Mi, Andreas Thust, Karsten Tillmann
Summary: Transmission electron microscopy is a crucial tool for studying the structure and properties of materials at atomic resolution. It allows for high spatial resolution and enables the correlation between microstructure and macroscopic properties. With the development of aberration-corrected electron optics, it became possible to perform picometer-scale measurements and chemical analyses. This paper aims to introduce this new type of electron microscopy, discuss its implications, applications, and limitations in materials science, and provide access to relevant literature.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yuhiro Segawa, Kenji Yamazaki, Jun Yamasaki, Kazutoshi Gohara
Summary: A new method for measuring the 3D atomic structure of free-standing graphene ripples using TEM is proposed and experimentally validated. The specimen in the experiment was found to be moving upward, and the ripple was approximated as a composite of sinusoidal waves while measuring the time dependence of its height and lateral size.
Article
Chemistry, Multidisciplinary
Ondrej Dyck, Sinchul Yeom, Andrew R. Lupini, Jacob L. Swett, Dale Hensley, Mina Yoon, Stephen Jesse
Summary: Atomic-scale engineering combines bottom-up and top-down approaches to achieve atomic-scale precision patterning in twisted bilayer graphene, using an aberration-corrected scanning transmission electron microscope (STEM) and controlled ejection of carbon atoms. The application of global and local parameters allows for spontaneous arrangement of atoms and migration of adatoms on the material surface. Image-based feedback control facilitates the attachment of arbitrary patterns of atoms and atom clusters with limited human intervention. The role of substrate temperature in adatom and vacancy diffusion is studied through simulations.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Ondrej Dyck, Andrew R. Lupini, Stephen Jesse
Summary: The engineering of quantum materials involves the development of tools for synthesis and characterization challenges. One key factor is atomic-scale modification for desired atomic structures. The use of scanning transmission electron microscopes (STEMs) allows for atomic-scale material manipulation but obstacles like in situ material delivery exist. This article presents progress on in situ thermal deposition platform for synthesis processes in a scanning transmission electron microscope.
Article
Thermodynamics
Juhang Cha, Hwijong Shin, Ohmyoung Kwon
Summary: Through this study, we achieved a two-dimensional extension of NP SThM with almost a 20-fold improvement in measurement sensitivity under mild vacuum conditions. Vacuum point scanning thermal microscopy has been proven to be an essential tool in the analysis of nanoscale energy transport and conversion inside nanodevices and nanomaterials.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Ondrej Dyck, Andrew R. Lupini, Stephen Jesse
Summary: The scanning transmission electron microscope is being developed into a platform for atomic-scale material manipulation and fabrication, offering new capabilities and applications. This approach may significantly impact research in microelectronics, quantum information science, and catalysis, by enabling precise control over atomic-scale structure and chemistry, and providing a better understanding of atomic-scale processes for larger-scale synthesis.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ondrej Dyck, Andrew R. Lupini, Stephen Jesse
Summary: In this study, we demonstrate an electron beam direct-write process in an aberration-corrected scanning transmission electron microscope. This process differs from conventional electron-beam-induced deposition techniques as it uses a different mechanism and elemental tin (Sn) as a precursor to enable atom-by-atom direct writing. The atomic-sized electron beam is used to generate chemically reactive point defects in a graphene substrate, allowing the precursor atoms to migrate and bond to the defect sites for deposition.
Article
Chemistry, Multidisciplinary
Shijie Sun, Baijin Li, Boyu Fu, Zilin Ruan, Hui Zhang, Wei Xiong, Yong Zhang, Gefei Niu, Jianchen Lu, Xiaoqing Zuo, Lei Gao, Jinming Cai
Summary: Nanoscale low-dimensional chiral architectures have attracted increasing scientific interest due to their potential applications in chiral recognition, separation, and transformation. In this study, large-area two-dimensional chiral networks on Au(111) and one-dimensional metal-liganded chiral chains on Cu(111) were successfully constructed and characterized. The chiral transformation of the chiral networks on Au(111) was analyzed, and the electronic state information was studied using scanning tunneling spectroscopy. The combination of scanning tunneling microscopy and non-contact atomic force microscopy techniques enabled ultra-high-resolution characterization of chiral structures on low-dimensional surfaces.
CHINESE CHEMICAL LETTERS
(2022)
Article
Cell Biology
Mikhail Petrov, Igor Sokolov
Summary: By introducing machine learning methods for the analysis of adhesion maps, we are able to distinguish precancerous and cancerous cervical cells with good precision, which is significant for improving cervical cancer screening.
Article
Multidisciplinary Sciences
Zhibin Shao, Shaojian Li, Yanzhao Liu, Zi Li, Huichao Wang, Qi Bian, Jiaqiang Yan, David Mandrus, Haiwen Liu, Ping Zhang, X. C. Xie, Jian Wang, Minghu Pan
Summary: Recently, log-periodic quantum oscillations with discrete scale invariance (DSI) have been observed in topological materials. By studying the atomic vacancies in HfTe5, geometric quasi-bound states with DSI feature were discovered, resembling an artificial supercritical atom collapse. These findings provide insights into the understanding of DSI in quantum materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Xiushang Xu, Marco Di Giovannantonio, Jose Urgel, Carlo A. Pignedoli, Pascal Ruffieux, Klaus Muellen, Roman Fasel, Akimitsu Narita
Summary: Graphene nanoribbons (GNRs) show promise for electronic devices, with the ability to fine-tune electronic characteristics through structural modifications. On-surface synthesis allows for the fabrication and visualization of GNRs with precise chemical structures, including the incorporation of non-hexagonal rings for potential application in non-benzenoid carbon nanomaterials.
Article
Materials Science, Multidisciplinary
O. Dyck, M. Ziatdinov, S. Jesse, F. Bao, A. Yousefzadi Nobakht, A. Maksov, B. G. Sumpter, R. Archibald, K. J. H. Law, S. Kalinin
Summary: The structure, bonding, and chemical dynamics of reactions at surfaces and interfaces are closely tied to the energetic landscape where each atom resides. Moving atoms under electron beam excitation can be utilized to probe energy landscapes along confined step edges, offering insights into atomic-scale potentials and the possibility for predictive atom-by-atom fabrication.
Article
Multidisciplinary Sciences
Kuan Ren, Junfeng Wu, Jianjun Dong, Yaran Li, Tianxuan Huang, Hang Zhao, Yaoyuan Liu, Zhurong Cao, Jiyan Zhang, Baozhong Mu, Ji Yan, Wei Jiang, Yudong Pu, Yulong Li, Xiaoshi Peng, Tao Xu, Jiamin Yang, Ke Lan, Yongkun Ding, Shaoen Jiang, Feng Wang
Summary: In this study, high-spatial resolution measurements of X-rays emitted by the hotspot in inertial confinement fusion experiments were conducted at a 100 kJ laser facility in China. The experimental results were congruent with theoretical calculations, enhancing the understanding of the physical processes involved. This work is significant for updating the theoretical model of capsule implosion and quantitatively exploring the hotspot's physical conditions.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Amin Reihani, Yuxuan Luan, Shen Yan, Ju Won Lim, Edgar Meyhofer, Pramod Reddy
Summary: The quantitative mapping of temperature fields with nanometric resolution is crucial in various scientific research areas and emerging technologies. Recent advances in scanning thermal microscopy (SThM) have enabled simultaneous quantification of tip-sample thermal resistance and topography, allowing for quantitative thermometry even in situations where the temperature field is modulated. The introduction of a modulated heat input to the scanning thermal probe (STP) allows for the mapping of unmodulated temperature fields with high spatial and temperature resolution, facilitating temperature mapping of microdevices under practical operating conditions.
Article
Chemistry, Multidisciplinary
Shu Hsuan Su, Pei-Yu Chuang, Hsin-Yu Chen, Shih-Chang Weng, Wei-Chuan Chen, Ku-Ding Tsuei, Chao-Kuei Lee, Shih-Hsun Yu, Mitch M-C Chou, Li-Wei Tu, Horng-Tay Jeng, Chien-Ming Tu, Chih-Wei Luo, Cheng-Maw Cheng, Tay-Rong Chang, Jung-Chun Andrew Huang
Summary: The study demonstrates the topological proximity effect between antimonene and Sb2Te3, indicating the 2D material antimonene possesses a 2D topological state and forms Dirac fermions at the interface of a 2D normal insulator and a 3D topological insulator. By hydrogen etching Sb2Te3, the position of the Dirac point and shape of the Dirac surface state can be tuned, providing a new approach to create QSH systems in 2D-material TI heterostructures.