Bond length and electric current oscillation of long linear carbon chains: Density functional theory, MpB model, and quantum spin transport studies

2014 ◽  
Vol 140 (13) ◽  
pp. 134703 ◽  
Author(s):  
R. Y. Oeiras ◽  
E. Z. da Silva
Keyword(s):  
Density Functional Theory ◽  
Bond Length ◽  
Electric Current ◽  
Density Functional ◽  
Spin Transport ◽  
Quantum Spin ◽  
Current Oscillation ◽  
Functional Theory ◽  
Carbon Chains ◽  
Transport Studies

CH2O Adsorption on M (M = Li, Mg and Al) Atom Deposited ZnO Nano-Cage: DFT Study

2018 ◽  
Vol 786 ◽  
pp. 384-392 ◽  
Author(s):  
Hussein Y. Ammar
Keyword(s):  
Density Functional Theory ◽  
Bond Length ◽  
Density Functional ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Structural And Electronic Properties ◽  
Formaldehyde Molecule ◽  
Electronic Configurations ◽  
Adsorption Energies ◽  
Homo Lumo

The structural and electronic properties of Li, Mg and Al deposited ZnO nanocages and their effects on the adsorption of formaldehyde molecule have been investigated using the density functional theory (DFT) computations. To understand the behavior of the adsorbed CH2O molecule on the ZnO nanocage, results of DFT calculations of the M-deposited nanocages (M=Li, Mg and Al), as well as complex systems consisting of the adsorbed CH2O molecule on M-deposited ZnO nanocage were reported. The results presented include adsorption energies, bond lengths, electronic configurations, density of states and molecular orbitals. It was found that, the most energetically stable adsorption configurations of CH2O molecule on the bare ZnO leads to 12% dilation in C=O bond length of CH2O and 14% decrease in HOMO-LUMO gap of ZnO cluster. The most energetically stable adsorption configurations of CH2O molecule on Li, Mg and Al-deposited ZnO lead to 4%, 4% and 11% dilation in C=O bond length of CH2O and-0.66, -45 and , +66% change in HOMO-LUMO gap of ZnO nanocages, respectively. The interaction between CH2O with bare ZnO and M-deposited ZnO nanocages is attributed to charge transfer mechanism. These results may be meaningful for CH2O degradation and detection.

Strain modulation on spin transport properties of PTB junction with MoC2 electrodes

2021 ◽  
Author(s):  
Yaoxing Sun ◽  
Bei Zhang ◽  
shidong zhang ◽  
Dan Zhang ◽  
Jiwei Dong ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Electron Transport ◽  
Transport Properties ◽  
Density Functional ◽  
Spin Transport ◽  
Functional Theory ◽  
Spintronic Devices ◽  
Spin Polarized ◽  
Electron Transport Properties ◽  
Strain Modulation

Based on MoC2 nanoribbons and poly-(terphenylene-butadiynylene) (PTB) molecules, we designed MoC2-PTB molecular spintronic devices and investigated their spin-dependent electron transport properties by using spin-polarized density functional theory and non-equilibrium Green's...

Reconstruction of Nonpolar Gan Surfaces

1996 ◽  
Vol 423 ◽  
Author(s):  
J. Elsner ◽  
M. Haugk ◽  
Th. Frauenheim
Keyword(s):  
Density Functional Theory ◽  
Bond Length ◽  
Density Functional ◽  
Rotation Angle ◽  
Tight Binding ◽  
Functional Theory ◽  
Zinc Blende ◽  
Nonpolar Gan

AbstractA density-functional theory based nonorthogonal tight-binding scheme is used to investigate the nonpolar surfaces of GaN in the wurtzite and zinc-blende phases. In III-V semiconductors the nonpolar surfaces mainly reconstruct by a bond-length conserving rotation of the surface atoms. In contrast to that for all nonpolar GaN surfaces this bond-length is shortened by ≈3 − 4%. We furthermore find the rotation angle to be significantly smaller than could be expected from results for GaAs and GaP.

Protonation Effect on C-N Bond Length of Alkylamines Studied by Molecular Orbital Calculations

2000 ◽  
Vol 55 (9-10) ◽  
pp. 769-771 ◽  
Keyword(s):  
Density Functional Theory ◽  
Bond Length ◽  
Molecular Orbital ◽  
Density Functional ◽  
Second Order ◽  
Basis Set ◽  
Molecular Orbital Calculations ◽  
Functional Theory ◽  
Hartree Fock ◽  
Protonation Effect

Abstract Molecular orbital calculations were performed for the six saturated alkylamines (CH3NH2 , (CH3)2 NH, (CH 3)3 N, CH 3CH2NH2 , (CH3)2 CHNH2 , (CH3)3 CNH2), their protonated cations (CH3NH3 + , (CH3)2NH2 + , (CH3)3NH + , CH3CH2NH3 + , (CH3)2CHNH3 + , (CH3)3CNH3+), and (CH3)4 N + using the Hartree-Fock, second-order M0ller-Plesset, and density functional theory methods with the 6-311+G(d,p) basis set. Protonation lengthens the C-N bonds of the amines by 0.05 -0.08 Å and shortens the C-C bonds of CH3CH2NH2, (CH3)2CHNH2 , and (CH3)3CNH2 by ca. 0.01 Å.

Density Functional Theory Study of Finite Carbon Chains

ACS Nano ◽  
2009 ◽  
Vol 3 (11) ◽  
pp. 3788-3794 ◽  
Author(s):  
XiaoFeng Fan ◽  
Lei Liu ◽  
JianYi Lin ◽  
ZeXiang Shen ◽  
Jer-Lai Kuo
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Carbon Chains

Density functional theory study on the thermodynamics and mechanism of carbon dioxide capture by CaO and CaO regeneration

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39460-39468 ◽  
Author(s):  
Ze Sun ◽  
Jia Wang ◽  
Wei Du ◽  
Guimin Lu ◽  
Ping Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Density Functional Theory ◽  
Bond Length ◽  
Density Functional ◽  
Carbon Dioxide Capture ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Adsorbed Co

The bond length between the C atom in CO2 and O atom in CaO was about 1.39–1.42 Å, and the bond length of C–O in adsorbed CO2 was prolonged to 1.26–1.27 Å, while the O–C–O angle of adsorbed CO2 was about 129°.

Spin transport properties in lower n-acene–graphene nanojunctions

2015 ◽  
Vol 17 (17) ◽  
pp. 11292-11300 ◽  
Author(s):  
Dongqing Zou ◽  
Bin Cui ◽  
Xiangru Kong ◽  
Wenkai Zhao ◽  
Jingfen Zhao ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Transport Properties ◽  
Density Functional ◽  
Spin Transport ◽  
Graphene Nanoribbon ◽  
Function Technique ◽  
Functional Theory ◽  
Spin Polarized ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

A series of n-acene–graphene (n = 3, 4, 5, 6) devices, in which n-acene molecules are sandwiched between two zigzag graphene nanoribbon (ZGNR) electrodes, are modeled through the spin polarized density functional theory combined with the non-equilibrium Green's function technique.

Quantum spin correction scheme based on spin-correlation functional for Kohn–Sham spin density functional theory

2007 ◽  
Vol 310 (2) ◽  
pp. e492-e494 ◽  
Author(s):  
Shusuke Yamanaka ◽  
Ryo Takeda ◽  
Kazuto Nakata ◽  
Toshikazu Takada ◽  
Mitsuo Shoji ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Spin Density ◽  
Density Functional ◽  
Spin Correlation ◽  
Quantum Spin ◽  
Functional Theory ◽  
Correction Scheme
Sign in / Sign up

Export Citation Format

Share Document