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9篇 您的检索式:作者名="KOMSA"
    题名 作者 年代 出处 被引量
1Arrival rate of nonindigenous insect species into the United States through foreign trade显示文摘Timothy T. Work Deborah G. McCullough Joseph F. Cavey Ronald Komsa 2005Biological Invasions2005,,2:1
2Thermal stability of calf skin collagentype I in salt solution显示文摘Komsa P R Koynova R Kostov G 1996Biochimica et Biolphysica Acta1996,1297,:1
3Beryllium doping of GaAs and GaAsN studied from first principles 显示文摘KOMSA H P AROLA E 2009Phys Rev B2009,79,11:1
4Band offset determination of the GaAs/GaAsN interface using the density functional theory method显示文摘KOMSA H P AROLA E LARKINS E 0,,:1
5Two-dimensional Transition Metal Dichalcogenides under Electron Irradiation: Defect Production and Doping显示文摘Komsa H Kotakoski J Kurasch S 2012Physical Review Letters2012,10,03:1
6Thermal stability of calf skin collagen type Ⅰ in salt solutions 显示文摘Komsa - Penkova R Koynova R Kostov G 1996Biochimica et Biophysica Acta1996,1297,:1
7Carriers of thrombophilic factor among women with preeclamp-sia ( preliminary report) 显示文摘Ivanov P Komsa P R Ivanov I 2007Akush Ginekol (Sofiia)2007,46,8:1
8Simulating Raman spectra by combining first-principles and empirical potential approaches with application to defective MoS_(2)显示文摘Successful application of two-dimensional transition metal dichalcogenides in optoelectronic,catalytic,or sensing devices heavily relies on the materials’quality,that is,the thickness uniformity,presence of grain boundaries,and the types and concentrations of point defects.Raman spectroscopy is a powerful and nondestructive tool to probe these factors but the interpretation of the spectra,especially the separation of different contributions,is not straightforward.Comparison to simulated spectra is beneficial,but for defective systems first-principles simulations are often computationally too expensive due to the large sizes of the systems involved.Here,we present a combined first-principles and empirical potential method for simulating Raman spectra of defective materials and apply it to monolayer MoS_(2) with random distributions of Mo and S vacancies.We study to what extent the types of vacancies can be distinguished and provide insight into the origin of different evolutions of Raman spectra upon increasing defect concentration.We apply to our simulated spectra the phonon confinement model used in previous experiments to assess defect concentrations,and show that the simplest form of the model is insufficient to fully capture peak shapes,but a good match is obtained when the type of phonon confinement and the full phonon dispersion relation are accounted for.Zhennan Kou Arsalan Hashemi Martti J.Puska Arkady V.Krasheninnikov Hannu-Pekka Komsa 2020npj Computational Materials2020,,1:0
9Niobium doping induced mirror twin boundaries in MBE grown WSe2 monolayers显示文摘Mirror twin boundary(MTB)brings unique one-dimensional(1D)physics and properties into two-dimensional(2D)transition metal dichalcogenides(TMDCs),but they were rarely observed in non-Mo-based TMDCs.Herein,by post growth Nb doping,high density 4|4E-W and 4|4P-Se mirror twin boundaries(MTBs)were introduced into molecular beam epitaxy(MBE)grown WSe2 monolayers.Of them,4|4E-W MTB with a novel structure was discovered experimentally for the first time,while 4|4P-Se MTBs present a random permutations of W and Nb,forming a 1D alloy system.Comparison between the doped and non-doped WSe2 confirmed that Nb dopants are essential for MTB formation.Furthermore,quantitative statistics reveal the areal density of MTBs is directly proportional to the concentration of Nb dopants.To unravel the injection pathway of Nb dopants,first-principles calculations about a set of formation energies for excess Nb atoms with different configurations were conducted,based on which a model explaining the origin of MTBs introduced by excess metal was built.We conclude that the formation of MTBs is mainly driven by the collective evolution of excess Nb atoms introduced into the lttice of host WSe2 crystal and subsequent displacement of metal atoms(W or Nb).This study provides a novel way to tailor the MTBs in 2D TMDC materials via proper metal doping and presents new opportunities for exploring the intriguing properties.Bo Wang Yipu Xia Junqiu Zhang Hannu-Pekka Komsa Maohai Xie Yong Peng Chuanhong Jin 2020Nano Research2020,13,7:0
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