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Adsorption of O-2 on Ag(111): Evidence of Local Oxide Formation
Physical Review Letters. 2016. Vol. 117. P. 056101-1-056101-5.
The atomic structure of the disordered phase formed by oxygen on Ag(111) at low coverage
is determined by a combination of low-temperature scanning tunneling microscopy and density
functional theory. We demonstrate that the previous assignment of the dark objects in STM to
chemisorbed oxygen atoms is incorrect and incompatible with trefoil-like structures observed in
atomic-resolution images in current work. In our model, each object is an oxide-like ring formed by
six oxygen atoms around the vacancy in Ag(111). The saturation coverage of the disordered phase
was found to be 0.36 ML, being six time larger than in the previous models.
Павлова Т. В., Physical Review Letters 2016 Vol. 117 No. 5 Article 056101
The atomic structure of the disordered phase formed by oxygen on Ag(111) at low coverage is determined by a combination of low-temperature scanning tunneling microscopy and density functional theory. We demonstrate that the previous assignment of the dark objects in STM to chemisorbed oxygen atoms is incorrect and incompatible with trefoil-like structures observed in atomic-resolution ...
Added: October 22, 2021
B. V. Andryushechkin, Pavlova T. V., Journal of Chemical Physics 2022 Vol. 156 No. 16 Article 164702
Room temperature adsorption of molecular iodine on Ag(111) has been studied by scanning tunneling microscopy (STM), low energy electron diffraction, Auger electron spectroscopy with factor analysis, and density functional theory (DFT). At the chemisorption stage, iodine first forms a (√3 ×√3)R30○ structure. Further iodine dosing leads to continuous commensurate–incommensurate phase transition, taking place via the formation of striped ...
Added: December 13, 2022
T.V. Pavlova, S.L. Kovalenko, K.N. Eltsov, Journal of Physical Chemistry C 2020 Vol. 124 No. 15 P. 8218-8224
The structures formed by propylene adsorption on Ni(111) at room temperature are determined by a combination of scanning tunneling microscopy and density functional theory. As a result of the interaction with the Ni(111) surface, propylene molecules are dehydrogenated and coupled into linear hydrocarbon chains. The length of the chains varies from 8 to 60 Å, ...
Added: December 7, 2020
S.L. Kovalenko, T.V. Pavlova, B.V. Andryushechkin et al., Physics of Wave Phenomena 2020 Vol. 28 No. 3 P. 293-298
Nickel-doped graphene has been synthesized from propylene on the Ni(111) surface and studied using scanning tunneling microscopy (STM) and density functional theory (DFT). It is established that nickel centers are formed during graphene synthesis on the Ni(111) surface by both chemical vapor deposition (CVD) and temperature-programmed growth (TPG); apparently, they are always present in graphene ...
Added: December 7, 2020
Zhussupbekov K., Walshe K., Walls B. et al., Journal of Physical Chemistry C 2021 Vol. 125, No. 10 P. 5549-5558
Defects introduced to the surface of Bi(111) break the translational symmetry and modify the surface states locally. We present a theoretical and experimental study of the 2D defects on the surface of Bi(111) and the states that they induce. Bi crystals cleaved in ultrahigh vacuum (UHV) at low temperature (110 K) and the resulting ion-etched ...
Added: December 5, 2021
Nikita S. Komarov, Tatiana V. Pavlova, Boris V. Andryushechkin, Journal of Physical Chemistry C 2019 Vol. 123 No. 45 P. 27659-27665
Scanning tunneling microscopy (STM), lowenergy electron diffraction (LEED), Auger electron spectroscopy (AES) and density functional theory (DFT) calculations have been used to investigate the I2 adsorption on the Ni(110) surface. Dissociative adsorption takes place rapidly to form a c(2×2) layer at iodine coverage of 0.5 ML. DFT calculations show that hollow sites are energetically preferable ...
Added: October 25, 2019
Berman S., Zhussupbekova A., Walls B. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 107 No. 16 Article 165425
The niobium surface is almost always covered by a native oxide layer which greatly influences the performance
of superconducting devices. Here we investigate the highly stable niobium oxide overlayer of Nb(110), which is
characterized by its distinctive nanocrystal structure as observed by scanning tunneling microscopy (STM). Our
ab initio density functional theory (DFT) calculations show that a subtle ...
Added: December 24, 2023
Kovalenko S., Pavlova T., Андрюшечкин Б. В. et al., Письма в Журнал экспериментальной и теоретической физики 2017 Т. 105 С. 170-174
Методами сканирующей туннельной микроскопии (СТМ) и теории функционала плотности (ТФП) изучен процесс термопрограммируемого синтеза графена из молекул пропилена на поверхности Ni(111) в условиях сверхвысокого вакуума. Установлено, что на атомных террасах Ni(111) адсорбция пропилена при комнатной температуре приводит к дегидрированию молекул пропилена с формированием одноатомных углеродных цепочек, а на краях атомных ступеней – к полной диссоциации ...
Added: December 7, 2020
Коваленко С. Л., Т.В. Павлова, Б.В. Андрюшечкин et al., Письма в Журнал экспериментальной и теоретической физики 2017 Т. 105 С. 170-174
The thermally controlled synthesis of graphene from propylene molecules on the Ni(111) surface in ultrahigh vacuum is studied by scanning tunneling microscopy and density functional theory. It is established that the adsorption of propylene on Ni(111) atomic terraces at room temperature results in the dehydration of propylene molecules with the formation of single-atomic carbon chains ...
Added: February 26, 2018
Walls B., Mazilkin A. A., Mukhamedov B. O. et al., Scientific Reports 2021 Vol. 11 Article 3496
In this work we present a comprehensive study of the domain structure of a nickel oxide single crystal grown by foating zone melting and suggest a correlation between point defects and the observed domain structure. The properties and structure of domains dictate the dynamics of resistive switching, water splitting and gas sensing, to name but ...
Added: December 5, 2021
Kovalenko S., Pavlova T., Андрюшечкин Б. В. et al., Письма в Журнал экспериментальной и теоретической физики 2020 Т. 111 № 10 С. 697-704
На поверхности Ni(111) реализован оригинальный термопрограммируемый рост монокристаллов азотированного графена размером с подложку. Технологический процесс включает в себя адсорбцию ацетонитрила при температуре около −10 °C, флэш-прогрев образца до 140 °C, отжиг при 400 °C для образования сплошного эпитаксиального монослоя углерода со структурой графена. Интеркаляция золота под слой углерода на поверхности Ni(111) приводит к формированию квазисвободного ...
Added: December 7, 2020
S.L. Kovalenko, B.V. Andryushechkin, K.N. Eltsov, Carbon 2020 Vol. 164 P. 198-206
This paper reports an STM study of all stages of the intercalation of oxygen at the interface of a strongly coupled graphene/Ni(111) system prepared by temperature programmed growth (TPG) method. We have found that at the first stage of the intercalation at 120 °C, oxygen forms a chemisorbed layer on Ni(111) with a coverage about 0.26–0.28 ML, ...
Added: December 7, 2020
Katushkina O. A., Quemerais E., Izmodenov V.V. et al., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2017 Vol. 122 No. 11 P. 10921-10937
In this work, we present for the first time the Lyman α intensities measured by Voyager 1/UVS in 2003–2014 (at 90–130 AU from the Sun). During this period Voyager 1 measured the Lyman α emission in the outer heliosphere at an almost fixed direction close to the upwind (i.e.“ toward the interstellar flow). The data show an unexpected behavior in 2003–2009: the ...
Added: January 26, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., The European Physical Journal C - Particles and Fields 2023 Vol. 83 Article 543
https://link.springer.com/article/10.1140/epjc/s10052-023-11673-x#Abs1 ...
Added: December 4, 2023
Ружицкая Д. Д., САМОЙЛЕНКО А. А., Иванов А. Д. et al., Optoelectronics, Instrumentation and Data Processing 2017 Vol. 54 No. 1 P. 1-8
This paper presents an algorithm for processing the transmission spectra of whisperinggallery optical microcavities for use as a nanoparticle detector. The algorithm is based on the broadening of the microcavity resonance curve during precipitation of nanoparticles on the microcavity surface. Experimental results on the detection of particles are compared with Langmuir adsorption theory. The contribution ...
Added: May 25, 2018
М. : National Instruments Russia, 2017
Содержание сборника составляют доклады с результатами оригинальных исследований и технических решений, ранее не публиковавшиеся. Мы надеемся, что предлагаемый сборник окажется полезным для специалистов, работающих в различных областях науки и техники, для широкого круга преподавателей, аспирантов и студентов ВУЗов, а также для преподавателей средних школ и технических колледжей. ...
Added: May 10, 2017
Загорский Д. Л., Долуденко И. М., Каневский В. М. et al., Известия РАН. Серия физическая 2021 Т. 85 № 8 С. 1088-1094
FeCo and FeNi alloyed nanowires (NW) were obtained by the matrix synthesis method: the effect of the
growth voltage and the effect of using a reference electrode were studied. It is shown that the composition of
FeNi nanowires strongly depends on the growth potential (with its increase, the bcc structure is changing into
fcc), and it is also ...
Added: November 12, 2021
Panina I., Balandin S., Tsarev A. et al., International Journal of Molecular Sciences 2023 Vol. 24 No. 2 P. 1
To date, a number of lantibiotics have been shown to use lipid II — a highly conserved peptidoglycan precursor in the cytoplasmic membrane of bacteria — as their molecular target. The α-component (Lchα) of the two-component lantibiotic lichenicidin (Lchα), previously isolated from the Bacillus licheniformis VK21 strain, seems to contain two putative lipid II binding ...
Added: February 21, 2023
Alfimov M., Litvinov A., Journal of High Energy Physics 2022 No. 01 Article 43
We study regularization scheme dependence of beta-function for sigma models with two-dimensional target space. Working within four-loop approximation, we conjecture the scheme in which the beta-function retains only two tensor structures up to certain terms containing zeta_3. Using this scheme, we provide explicit solutions to RG flow equation corresponding to Yang-Baxter- and lambda-deformed SU(2)/U(1) sigma ...
Added: February 1, 2022
Kuzmichev S. A., Kuzmicheva T. E., Tchesnokov S. N. et al., Journal of Superconductivity and Novel Magnetism 2016 Vol. 29 No. 4 P. 1111-1116
We present temperature dependences of the large and the small superconducting gaps measured directly by SnS-Andreev spectroscopy in various Fe-based superconductors and MgB2. The experimental L,S(T ) are wellfitted with a two-gap model based on Moskalenko and Suhl system of equations (supplemented with a BCS integral renormalization). From the fitting procedure, we estimate the key ...
Added: March 19, 2016
Orekhov M., Russian Journal of Physical Chemistry A 2021 Vol. 95 P. 2059-2064
Molecular dynamic models are created for properties of bivalent ions in organic solvents. It is shown that molecules of the considered solvents bound to ions via oxygen atoms. A theoretical model is developed that describes the ion coordination number. The coordination number in this model is determined by the ratio between the sizes of the ...
Added: October 14, 2021
M. : Faculty of Physics, MSU, 2017
The Low Temperature Physics Conference is an international event held every three years, under the auspices of the IUPAP through its Commission C5 on Low Temperature Physics. The aim of these conferences is to exchange information and views among the members of the international scientific community in the general field of Low Temperature Physics. It ...
Added: October 1, 2017
Min Namkung, Younghun K., Scientific Reports 2018 Vol. 8 No. 1 P. 16915-1-16915-18
Sequential state discrimination is a strategy for quantum state discrimination of a sender’s quantum
states when N receivers are separately located. In this report, we propose optical designs that can
perform sequential state discrimination of two coherent states. For this purpose, we consider not
only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior
probabilities. Since ...
Added: November 16, 2020
Aaij R., Abdelmotteleb A. S., Abellán Beteta C. et al., Physical Review Letters 2022 Vol. 129 No. 9 Article 091801
The first study of the angular distribution of μþμ− pairs produced in the forward rapidity region via the Drell-Yan reaction pp → γ=Z þ X → lþl− þ X is presented, using data collected with the LHCb detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.1 fb−1. The coefficients ...
Added: December 29, 2022