scholarly journals A First-Principles Study of Gas Molecule Adsorption on Carbon-, Nitrogen-, and Oxygen-Doped Two-Dimensional Borophene

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xinmao Qin ◽  
Wanjun Yan ◽  
Dongxiang Li ◽  
Zhongzheng Zhang ◽  
Shaobo Chen

A first-principles study was performed to investigate the adsorption properties of gas molecules (CO, CO2, NO, and NO2) on carbon- (C-), nitrogen- (N-), and oxygen-doped (O) borophene. The adsorption energies, adsorption configurations, Mulliken charge population, surface work functions, and density of states (DOS) of the most stable doped borophene/gas-molecule configurations were calculated, and the interaction mechanisms between the gas molecules and the doped borophene were further analyzed. The results indicated that most of the gas molecules exhibited strong chemisorption at the VB site (the center of valley bottom B–B bond) of the doped borophene (compared to pristine borophene). Electronic property analysis of the C-doped borophene/CO2 and the NO2 adsorption system revealed that there were numerous charge transfers from the C-doped borophene to the CO2 and NO2 molecules. This indicated that C-doped borophene was an electron donor, and the CO2 and NO2 molecules served as electron acceptors. In contrast to variations in the adsorption energies, electronic properties, and surface work functions of the different gas, C-, N-, and O-doped borophene adsorption systems, we concluded that the C-, N-, and O-doped borophene materials will improve the sensitivity of CO, CO2, and NO2 molecule; this improvement of adsorption properties indicated that C-, N-, and O-doped borophene materials are excellent candidates for surface work functions transistor to detect gas molecules.

2021 ◽  
Author(s):  
Siyi He ◽  
Mingzhu Yang ◽  
Shixin Pei

Abstract Based on first principle calculations, Ga rich and As(P) rich clean GaAs0.5P0.5(001) reconstruction surfaces and adsorbed surfaces with 0.125ML coverage of Cs at different sites are researched. Formation energy of Ga rich GaAs0.5P0.5(001) β2(4×2) reconstruction surface is smaller than that of As(P) rich one, and the work functions of Ga rich β 2 (4×2) and As(P) rich β2(2×4) surfaces are 4.657 eV and 5.187 eV, respectively. The adsorption energies of Cs adatoms on both surfaces are negative, showing that Cs adsorption is a stable exothermic process. The work functions of two surfaces both decrease after Cs adsorption, and the average variation of As(P) rich β2(2×4) surface is larger. Mulliken charge analysis shows that Cs adatoms transfer electrons to GaAsP substrate, resulting in Cs-GaAsP dioples which lower the work functions. When Cs atoms are located at D 2 of Ga rich surface and D 2 ' of As(P) rich surface, work function values of the two reconstruction surfaces reach the minimums, which are 2.834eV and 2.859eV, respectively. By calculating dipole moments, it can be found that Cs adatoms on the topmost layer form larger effective dipole moments with GaAsP substrate than the Cs atoms located in the trench.


2021 ◽  
Author(s):  
Lanjuan Zhou ◽  
Sujing Yu ◽  
Yan Yang ◽  
Qi Li ◽  
Tingting Li ◽  
...  

In this paper, the effects of five noble metals (Au, Pt, Pd, Ag, Ru) doped MoSe2 on improving gas sensing performance were predicted through density functional theory (DFT) based on...


2019 ◽  
Vol 4 (36) ◽  
pp. 10928-10933 ◽  
Author(s):  
Salavat Kh. Khadiullin ◽  
Andrey A. Kistanov ◽  
Svetlana V. Ustiuzhanina ◽  
Artur R. Davletshin ◽  
Kun Zhou ◽  
...  

2020 ◽  
Vol 44 (22) ◽  
pp. 9377-9381 ◽  
Author(s):  
Andrey A. Kistanov

Novel γ-PC is a promising reversible material for room-temperature gas sensors.


2020 ◽  
Vol 739 ◽  
pp. 137035 ◽  
Author(s):  
Xiaocong Liu ◽  
Yuhong Chen ◽  
Meiling Zhang ◽  
Cairong Zhang

Vacuum ◽  
2020 ◽  
Vol 175 ◽  
pp. 109293 ◽  
Author(s):  
Kaifei Bai ◽  
Zhen Cui ◽  
Enling Li ◽  
Yingchun Ding ◽  
Jiangshan Zheng ◽  
...  

2020 ◽  
Vol 384 (16) ◽  
pp. 126332
Author(s):  
Mingxia Song ◽  
Yuhong Chen ◽  
Xiaocong Liu ◽  
Wenhui Xu ◽  
Yingjie Zhao ◽  
...  

RSC Advances ◽  
2020 ◽  
Vol 10 (53) ◽  
pp. 31881-31888
Author(s):  
Rujing Fan ◽  
Biao Yang ◽  
Zhiwei Li ◽  
Dandan Ma ◽  
Wendong Yuan ◽  
...  

Based on first principles calculation, the adsorption properties of Li atoms and LiF molecules on the fluorographene (CFx) surface with different F/C ratio (x = 1.0, 0.9, 0.8, 0.5 and ∼0.0) have been studied in the present work.


Sign in / Sign up

Export Citation Format

Share Document