Review
Chemistry, Physical
F. Besenbacher, J. Lauritsen
Summary: Scanning probe microscopy plays a crucial role in hydroprocessing catalysis by revealing nanoparticle structures, active edge structures, and complex hydrocarbon structures at the atomic scale, as well as providing detailed information on the interaction mechanisms between heteroatom-containing hydrocarbons and catalyst particles. The emerging techniques such as near-ambient pressure scanning tunneling microscopy and low-temperature molecular imaging are also highlighted for their potential in advancing the field.
JOURNAL OF CATALYSIS
(2021)
Review
Chemistry, Physical
Prachi Ghoderao, Sanjay Sahare, Shern-Long Lee, Prashant Sonar
Summary: Scanning probe microscopy (SPM) is a powerful technique that allows for the observation and analysis of nanoscale materials and biological molecules through the use of sharp probes that scan the sample surface. This method, which includes scanning tunneling microscopy (STM) and atomic force microscopy (AFM), provides valuable insights into the properties and behavior of these materials at a molecular level. This review highlights the applications of SPM in biomolecule imaging and the study of physiological processes, as well as the challenges and potential solutions in biological sample preparation. It also discusses the recent advancements in STM and AFM applications on biomolecules, such as DNA, proteins, and carbohydrates, and their potential applications in fields like drug delivery and biosensors.
Review
Chemistry, Physical
Chunlei Yang, Tianhui Su, Yanbo Hua, Liming Zhang
Summary: This review summarizes the latest results of electrochemical scanning probe microscopy techniques in studying the interfacial properties of electrocatalysts and photoelectrodes, and offers some perspectives on future research directions.
Article
Chemistry, Multidisciplinary
Nicolas Neel, Joerg Kroeger
Summary: The study revealed that the formation of a chemical bond between a CO molecule and a Cu(111) surface is accompanied by bending of the molecular probe due to van der Waals attraction and Pauli repulsion, resulting in characteristic changes in the vertical force between CO and Cu(111) as a function of molecule-surface distance. Experimental data were successfully reproduced by model calculations, shedding new light on vertical-force extrema in scanning probe experiments.
Article
Chemistry, Multidisciplinary
Yuan Zhang, Daniel J. Trainer, Badri Narayanan, Yang Li, Anh T. Ngo, Sushila Khadka, Arnab Neogi, Brandon Fisher, Larry A. Curtiss, Subramanian K. R. S. Sankaranarayanan, Saw Wai Hla
Summary: By using a q+ atomic force microscopy at low temperature, researchers observed lateral force anisotropy of a sexiphenyl molecule moving on an atomically flat Ag(111) surface. The one-dimensional shape of the molecule was identified as the origin of this phenomenon, which was confirmed through molecular dynamics simulations. This finding may have significant implications for atomic scale frictional phenomena on materials surfaces.
Article
Chemistry, Multidisciplinary
Remy Pawlak, Xunshan Liu, Silviya Ninova, Philipp D'Astolfo, Carl Drechsel, Jung-Ching Liu, Robert Haner, Silvio Decurtins, Ulrich Aschauer, Shi-Xia Liu, Ernst Meyer
Summary: In this study, a substrate-assisted reaction on Ag(111) was used to synthesize two-dimensional graphene sheets with a long-range honeycomb Kagome lattice. Low-temperature scanning tunneling microscopy and atomic force microscopy, supported by density functional theory, were employed to scrutinize the structural and electronic properties of N-KG down to the atomic scale. The research demonstrated the semiconducting character of N-KG due to nitrogen doping, as well as the emergence of Kagome flat bands near the Fermi level.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Yaoping Hou, Chengfu Ma, Wenting Wang, Yuhang Chen
Summary: A plasmonic atomic force microscopy (AFM) probe was proposed, utilizing a part of the laser beam to monitor cantilever deflection as the excitation light source. By integrating photonic crystal cavities near the cantilever's free end, a confined hot-spot at the metal-coated tip apex can be induced via transmitted light excitation. Numerical simulations showed that the plasmonic probe can efficiently couple a tilted, linearly polarized beam and achieve a significant local electromagnetic enhancement, making it a powerful tool for simultaneous optical, mechanical, and electrical characterizations.
Editorial Material
Multidisciplinary Sciences
Telmo O. Paiva, Albertus Viljoen, Yves F. Dufrene
Summary: Advancements in atomic force microscopy (AFM) techniques and methodologies in microbiology have enhanced our understanding of microbial cell surfaces. Recent studies have shown that AFM imaging of cells and membranes at or near molecular resolution enables detailed visualization of membrane-drug interactions.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Multidisciplinary
Johannes Degenhardt, Rainer Tutsch, Gaoliang Dai
Summary: A method for correcting non-linear drift distortions in all three coordinate axes of atomic force microscope (AFM) images is presented. The method involves two measurements of the sample with two orthogonal fast scan axes, dividing the AFM images into segments, determining the shifts of the surface features, and calculating the drift. This method allows for correction of nonlinear drift and can be applied to existing images by measuring the sample again.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xunshan Liu, Adam Matej, Tim Kratky, Jesus Mendieta-Moreno, Sebastian Guenther, Pingo Mutombo, Silvio Decurtins, Ulrich Aschauer, Jascha Repp, Pavel Jelinek, Shi-Xia Liu, Laerte L. Patera
Summary: In this study, selective C-H activation of hexaazatriphenylene by Scholl reaction was reported for the first time, achieving dehydrogenative C-C couplings. The formation of one-dimensional polymers with a double-chain structure was revealed using low-temperature scanning tunneling microscopy and atomic force microscopy. Density functional theory calculations rationalized the growth process, highlighting the cooperative catalytic action of Na and Ag adatoms in steering the C-H selectivity for polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Applied
Shiquan Lin, Zhong Lin Wang
Summary: Inspired by TENG, scanning TENG is proposed for local surface charge density measurement using atomic force microscopy. The technique taps a conductive tip above a charged dielectric surface to induce an AC, with Fourier analysis showing a linear relation to surface charge density. Results demonstrate its power in probing nanoscale charge transfer in contact-electrification.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
R. V. Gainutdinov, E. V. Selezneva, I. P. Makarova, A. L. Vasiliev, A. L. Tolstikhina
Summary: Surface properties of superprotonic (K1-x(NH4)(x))(3)H(SO4)(2) (x >= 0.57) single crystals and their evolution under humidity were investigated using optical polarization microscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDXS). Additional techniques such as atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM), and scanning capacitance force microscopy (SCFM) were employed. The study examined fresh and aged cleavage surfaces perpendicular and parallel to the c axis of the trigonal superprotonic phase, considering the influence of air humidity, material composition, and surface orientation. Results showed changes in surface morphology, conductivity, potential, and capacitance, with the formation of a modified layer containing new crystal phases during aging.
SOLID STATE IONICS
(2023)
Article
Materials Science, Multidisciplinary
Yang Zhang, Hongyu Fan, Chunjie Niu, Yunqiu Cui, Weiyuan Ni, Weifeng Liu, Gunther Benstetter, Guangjiu Lei, Dongping Liu
Summary: The study observed the microscopic surface evolution of W crystals under low-energy He+ irradiations at 1050 K using scanning electron microscopy and atomic force microscopy. It was found that the He+ irradiation caused nanoscale undulations on the W (110) surface, with regions of less undulations dominating the microevolution of W crystals. Analysis indicated that the thermodynamic instability of irradiated W crystals was attributed to He nanobubble-driven surface growth.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Physical
Roelof Steeno, Hans Van Gorp, Peter Walke, Kunal S. Mali, Steven De Feyter
Summary: In this study, an AFM-based nanoshaving approach on graphite covalently functionalized using diazonium chemistry is reported. The removal of the covalently bound layer on graphite revealed two different types of breakdown products under ambient conditions. The strained graphite lattice was restored to its pristine sp(2) nature through nanoshaving, and the potential of AFM-based nanoshaving to investigate self-assembly processes under 2D lateral confinement was demonstrated.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
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
Physics, Multidisciplinary
T. Seeholzer, O. Gretz, F. J. Giessibl, A. J. Weymouth
NEW JOURNAL OF PHYSICS
(2019)
Article
Nanoscience & Nanotechnology
Dominik J. Kirpal, Korbinian Puerckhauer, Alfred J. Weymouth, Franz J. Giessibl
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2019)
Article
Physics, Multidisciplinary
A. Liebig, A. Peronio, D. Meuer, A. J. Weymouth, F. J. Giessibl
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Alfred J. Weymouth, Elisabeth Riegel, Oliver Gretz, Franz J. Giessibl
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Alexander Liebig, Prokop Hapala, Alfred J. Weymouth, Franz J. Giessibl
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Multidisciplinary
Alfred John Weymouth, Elisabeth Riegel, Bianca Simmet, Oliver Gretz, Franz J. Giessibl
Summary: The research shows that on the surfaces of Cu(111) and Ag(111), even without inelastic events, the presence of the tip can induce rotations of CuPc molecules, and closer approach results in the rotated states being favored. Additionally, the long-range attraction of the tip can change the potential energy landscape of the CuPc molecular switch, and the geometry of the rotated and ground states of CuPc differs on Cu(111) and Ag(111).
Article
Instruments & Instrumentation
Dominik Kirpal, Jinglan Qiu, Korbinian Puerckhauer, Alfred J. Weymouth, Michael Metz, Franz J. Giessibl
Summary: This study demonstrates the use of a qPlus sensor in atomic force microscopy to achieve atomic resolution in various environments, and shows how any qPlus AFM setup can be modified to work as a biaxial sensor for simultaneous measurement of lateral and vertical force components.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Nanoscience & Nanotechnology
Oliver Gretz, Alfred J. Weymouth, Thomas Holzmann, Korbinian Purckhauer, Franz J. Giessibl
Summary: In lateral force microscopy, utilizing the scanning tunneling microscopy channel for acquiring amplitude and tilt data provides a more accurate and reliable method.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Review
Physics, Applied
Alfred J. Weymouth, Oliver Gretz, Elisabeth Riegel, Franz J. Giessibl
Summary: In this study, we used lateral force microscopy to investigate the energy dissipation in sliding friction. We found that the CO molecule on the tip bends in different directions as it oscillates over pairs of atoms, leading to energy dissipation. Surprisingly, friction was observed only within a specific range of tip heights, indicating the sensitivity of friction to the local potential energy landscape.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Thomas Hofmann, Xinguo Ren, Alfred J. Weymouth, Daniel Meuer, Alexander Liebig, Andrea Donarini, Franz J. Giessibl
Summary: This study presents a method for the transition from graphite to diamond on the atomic scale and reveals the local rehybridization of the structure during this transition. The experimental observation of harmonics at specific thresholds and force reduction provides evidence for the existence of this transition.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Alfred J. Weymouth, Emily Roche, Franz J. Giessibl
Summary: This study investigates the effect of an electron donor on the electronic state by studying mixed islands of PTCDA and CuPc. The results show that the 2DEG state disappears and new states emerge under submonolayer coverage.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Theresa Seeholzer, Daniela Tarau, Lea Hollendonner, Andrea Auer, Reinhard Rachel, Dina Grohmann, Franz J. Giessibl, Alfred J. Weymouth
Summary: Researchers compared the S-layer proteins extracted from the archaeon Pyrobaculum aerophilium using atomic force microscopy (AFM) in liquid and ambient conditions with transmission electron microscopy (TEM) images under vacuum conditions. Improved AFM scanning and sample preparation methods allowed the observation of the crystalline structure of the S-layer samples.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Materials Science, Multidisciplinary
Alfred J. Weymouth, Mats Persson, Franz J. Giessibl
Summary: This study investigates the growth and structure of a thin insulating layer on Pt(111) by growing monolayer islands of NaCl and using scanning tunneling microscopy (STM) and atomic force microscopy (AFM). The STM images show a square lattice of Cl anions, while the AFM images only resolve approximately two-thirds of the Cl ions. Density functional theory (DFT) calculations reveal the bimodal distribution of the adsorption heights of the Cl anions above the surface, which can explain the AFM observations.
Article
Physics, Multidisciplinary
O. Gretz, A. J. Weymouth, F. J. Giessibl
PHYSICAL REVIEW RESEARCH
(2020)
Article
Nanoscience & Nanotechnology
Korbinian Puerckhauer, Dominik Kirpal, Alfred J. Weymouth, Franz J. Giessibl
ACS APPLIED NANO MATERIALS
(2019)
