Article
Chemistry, Multidisciplinary
Shuyi Liu, Adnan Hammud, Martin Wolf, Takashi Kumagai
Summary: The research demonstrates a method to significantly enhance Raman scattering by forming atomic point contact (APC), thereby detecting phonons on the silicon surface, and shows the chemical sensitivity of APC-TERS, expanding the applicability of TERS.
Article
Chemistry, Multidisciplinary
Yidi Shen, Sergey I. Morozov, Kun Luo, Qi An, William A. Goddard III
Summary: This study investigates the mechanism of the Si(111)-7 x 7 surface reconstruction using molecular dynamics simulations. Two possible pathways for the formation of the 7 x 7 structure are identified, both involving the generation of dimers and bridged five-membered rings, and the stabilization of the triangular halves of the unit cell. The corner hole is formed from the joining of several five-member rings. The insertion of atoms to form a dumbbell configuration involves additional atom diffusion or rearrangement.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yidi Shen, Sergey I. Morozov, Kun Luo, Qi An, William A. Goddard III
Summary: This study investigates the mechanism underlying the formation of the complex 7 x 7 structure on the Si(111) surface during annealing. Molecular dynamics simulations using a machine-learning force field reveal two possible pathways for the formation of the 7 x 7 structure, involving the creation of dimers and bridged five-membered rings. The findings have implications for manipulating the surface structure by introducing other atomic species.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Letizia Ferbel, Stefano Veronesi, Stefan Heun
Summary: In this study, rubidium adsorption and re-constructions on the Si(111)-(7 x 7) surface were investigated using STM and LEED. The effects of deposition temperature and Rb-coverage on the surface structures were observed. STM provided detailed information on the real space characterization of the Rb/Si(111)-(3 x 1) surface. These findings are important for understanding the behavior of rubidium on Si surfaces and have implications for applications in nanodevice fabrication.
Article
Chemistry, Physical
Xu Li, Keito Horiba, Ryoichi Sugiura, Tomoaki Yamada, Junji Yuhara
Summary: In this study, three different precursor Ba-O films on Pt(1 1 1) were characterized and oxide crystalline approximant (OCA) and oxide quasicrystal (OQC) films were prepared via Ti deposition and annealing. Analysis revealed phase transformation likely follows Ti reduction and Ba oxidation, leading to a change in surface atomic density. Structural models proposed for the OCA and OQC films involve cluster tiling of Ba atoms.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
J. C. Mahato, Debolina Das, Arindam Pal, Prabir Pal, B. N. Dev
Summary: Epitaxial gamma-FeSi2 and CoSi2 nanostructures grown on a vicinal Si(1 1 1)-7 x 7 surface have been investigated, revealing nanowires and nanoislands which could potentially find applications in nanoscale devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
David Garagnani, Paola De Padova, Carlo Ottaviani, Claudio Quaresima, Amanda Generosi, Barbara Paci, Bruno Olivieri, Mieczyslaw Jalochowski, Mariusz Krawiec
Summary: Si films of different thicknesses were grown on a Bi-covered Si substrate and studied using various surface characterization techniques. The results revealed the presence of a new Si allotrope structure, providing insights for the formation of heterostructures with topological insulator materials.
Article
Chemistry, Multidisciplinary
Iris Berg, Luca Schio, Justus Reitz, Elena Molteni, Linoy Lahav, Carolina Gutierrez Bolanos, Andrea Goldoni, Cesare Grazioli, Guido Fratesi, Max M. Hansmann, Luca Floreano, Elad Gross
Summary: In this study, the self-assembly of N-heterocyclic olefins (NHOs) on gold surface was investigated using experimental and computational methods. It was found that NHOs can self-assemble into dimers, trimers, and tetramers, forming stable monolayers. The study also revealed that NHOs can adsorb on gold surface in a flat-lying geometry through coordination with gold adatoms, and the surface interaction can be further increased by functionalizing the backbone with methyl groups, leading to enhanced thermal stability and impact on work-function values.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Condensed Matter
Zhang Qu, Yasuhiro Sugawara, Yanjun Li
Summary: Studies of the physics behind carrier transport characteristics and band bending in semiconductors are critical for the development of new devices. This study investigated the physical properties of Co ring-like cluster (RC) reconstruction on a Si(111)-7 x 7 surface at atomic resolution using atomic force microscopy/Kelvin probe force microscopy. The applied bias dependence of frequency shift was compared between Si(111)-7 x 7 and Co-RC reconstructions, and the accumulation, depletion, and reversion layers were identified in the Co-RC reconstruction. It was found for the first time that the Co-RC reconstruction on the Si(111)-7 x 7 surface exhibits semiconductor properties. These findings are valuable for the development of new materials for semiconductor devices.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
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
Chemistry, Multidisciplinary
Penghui Ji, Dominik Dettmann, Ying-Hsuan Liu, Giulia Berti, Navathej Preetha Genesh, Daling Cui, Oliver MacLean, Dmytro F. Perepichka, Lifeng Chi, Federico Rosei
Summary: Surface-confined reactions are a powerful method for synthesizing low-dimensional organic materials. Understanding the reaction pathways can enable the rational synthesis of various molecules and polymers. In this study, different reaction pathways of tetrathienylbenzene and its extended congener on Cu(111) were investigated using scanning tunneling microscopy, X-ray photoelectron spectroscopy, and density functional theory calculations.
Article
Chemistry, Multidisciplinary
Penghui Ji, Oliver MacLean, Gianluca Galeotti, Dominik Dettmann, Giulia Berti, Kewei Sun, Haiming Zhang, Federico Rosei, Lifeng Chi
Summary: This study systematically investigates the effects of oxygen on the synthesis of 3p-AGNRs, revealing a strong catalytic effect that reduces reaction temperature without degradation of the AGNRs. Utilizing Ullmann-type coupling on Cu(111), poly(para-phenylene) (3-AGNR) was synthesized and converted into wider 3p-AGNRs through lateral fusion. Scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy confirmed the formation of different ribbons, with regions of increased STM contrast attributed to the intercalation of Br atoms during lateral fusion.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Andrea Picone, Marco Finazzi, Lamberto Duo, Dario Giannotti, Franco Ciccacci, Alberto Brambilla
Summary: This experimental study investigates the interplay between the structural details and electronic properties of the C-60/Ni(111) interface, revealing the stabilization of two different phases and the adsorption geometry of the molecules. The results show that the electronic properties of C-60/Ni(111) are strongly influenced by the morphology of the interface, suggesting the potential for tuning the electronic properties of organic/inorganic heterostructures by adjusting the structural coupling with the substrate.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xinxin Zhou, Cong Guo, Zhongping Wang, Mingming Fu, Sheng Wei, Xiaoqing Liu, Sanqin Wu, Li Wang
Summary: The role of silver localized surface plasmons on the luminescence of a Si(111)-(7 x 7) surface was investigated using scanning tunneling microscopy at 77 K. It was found that the luminescence intensity from the Si surface underneath the Ag islands was significantly enhanced by about one order due to the strong coupling between the surface states of the Si and the LSPs of the Ag islands. In addition, light emission originating from the irradiation decay of the Ag plasmons was also detected during the study.
Article
Chemistry, Multidisciplinary
Kai Zhang, Marie-Christine Hanf, Romain Bernard, Yves Borensztein, Hervei Cruguel, Andrea Resta, Yves Garreau, Alina Vlad, Alessandro Coati, Davide Sciacca, Bruno Grandidier, Mickael Derivaz, Carmelo Pirri, Philippe Sonnet, Reigis Stephan, Geoffroy Prevot
Summary: Through scanning tunneling microscopy (STM), surface X-ray diffraction (SXRD), and density functional theory, we have revealed a Ge-induced (root 109 x root 109)R +/- 24.5 degrees reconstruction on Ag(111). We have demonstrated the possibility of solving a giant surface reconstruction using SXRD and STM. The reconstructed structure consists of Ge pentagons, hexagons, and heptagons, with the inclusion of a few dispersed Ag atoms.
Correction
Physics, Condensed Matter
N. I. Fedotov, S. V. Zaitsev-Zotov
JOURNAL OF PHYSICS-CONDENSED MATTER
(2019)
Article
Materials Science, Multidisciplinary
Nikolai Fedotov, Sergei Zaitsev-Zotov
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2019)
Article
Physics, Multidisciplinary
V. E. Minakova, A. M. Nikitina, S. V. Zaitsev-Zotov
Article
Physics, Multidisciplinary
S. V. Zaitsev-Zotov, I. A. Cohn
Article
Physics, Multidisciplinary
I. A. Cohn, S. G. Zybtsev, A. P. Orlov, S. Zaitsev-Zotov
Article
Physics, Multidisciplinary
V. E. Minakova, A. M. Nikitina, S. V. Zaitsev-Zotov
Article
Chemistry, Physical
S. G. Zybtsev, V. Ya Pokrovskii, V. F. Nasretdinova, S. Zaitsev-Zotov, E. Zupanic, M. A. van Midden, Woei Wu Pai
Summary: High temperature studies of the monoclinic phase of NbS3 (NbS3-II) show stable behavior up to around 550K, with clear evidence of charge-density wave (CDW) sliding around 450-475K. The high density charges condensed in the CDW exhibit extremely low mobility, leading to surprising dielectric-like temperature variations in conductivity above the CDW formation temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Alexander S. Sobolev, Sergey Zaitsev-Zotov, Maxim Maytama, Evgenyi A. Klimov, Alexander Y. Pavlov, Dmitry S. Ponomarev, Rustam A. Khabibullin
Summary: The paper presents a method for parameter extraction of lumped element networks representing resonant tunneling diodes. By using on-chip reflection coefficient measurements and differential resistance measurements, the parameters of GaAs/AlAs double-barrier RTDs were successfully extracted, with potential applications in active microstrip transmission lines discussed.
OPTICAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
S. G. Zybtsev, N. Yu Tabachkova, V. Ya Pokrovskii, S. A. Nikonov, A. A. Maizlakh, S. Zaitsev-Zotov
Summary: A new polytype of the quasi-one-dimensional conductor NbS3 with high-temperature charge density waves has been synthesized. The study reveals a new incommensurate distortion of the lattice in the new phase, which differs from the previously studied monoclinic phase. Transport properties of the samples under study are consistent with the superstructure study.
Editorial Material
Physics, Applied
Alexander A. Balandin, Sergei V. Zaitsev-Zotov, George Gruner
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
N. I. Fedotov, A. A. Maizlakh, V. V. Pavlovskiy, G. V. Rybalchenko, S. V. Zaitsev-Zotov
Summary: The van der Waals epitaxy of Bi2Te3 is impossible in vacuum PLD, but possible in the presence of a background gas. An unusual hexagonal superstructure resembling a charge-density wave is also observed.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
I. A. Cohn, S. V. Zaitsev-Zotov
Summary: This study demonstrates that the magnetoresistance of creeping charge-density waves in o-TaS3 changes its nature with temperature, showing a negative parabolic character at high temperatures and a weakly temperature-dependent negative linear relationship at low temperatures. The dominant contribution to the negative parabolic magnetoresistance is induced by the magnetic field splitting of the CDW order parameter. The linear magnetoresistance is caused by CDW quantum interference, resembling the scenario in single-electron systems.
Article
Materials Science, Multidisciplinary
S. G. Zybtsev, V. Ya Pokrovskii, V. F. Nasretdinova, S. Zaitsev-Zotov, V. V. Pryadun, E. S. Kozlyakova, O. S. Volkova, A. N. Vasiliev, Woei Wu Pai, D. Staresinic
Article
Materials Science, Multidisciplinary
M. Abdel-Hafiez, R. Thiyagarajan, A. Majumdar, R. Ahuja, W. Luo, A. N. Vasiliev, A. A. Maarouf, S. G. Zybtsev, V. Ya Pokrovskii, S. V-Zaitsev-Zotov, V. V. Pavlovskiy, Woei Wu Pai, W. Yang, L. Kulik
Correction
Materials Science, Multidisciplinary
S. G. Zybtsev, V. Ya. Pokrovski, V. F. Nasretdinova, S. V. Zaitsev-Zotov, V. V. Pavlovskiy, A. B. Odobesco, Woei Wu Pai, M. -W. Chu, Y. G. Lin, E. Zupanic, H. J. P. van Midden, S. Sturm, E. Tchernychova, A. Prodan, J. C. Bennett, I. R. Mukhamedshin, O. V. Chernysheva, A. P. Menushenkov, V. B. Loginov, B. A. Loginov, A. N. Titov, M. Abdel-Hafiez
