Atomic-Layer and Crystal-Orientation Resolved Local Strain, Binding Energy, and Potential Trap

Sun Changqing

crystal-orientation resolved local structural relaxation, binding energy and the energetic behavior of electrons in a

2009-09-11

Nanyang Technological University

#Physics#

What can we exactly learn from the XPS measurement of the orientation-resolved surface core level shift?

Sun Changqing

coordination numbers of the surface layers; (v) the z-dependence of the lattice strain, binding energy density

2009-09-23

School of Electrical and Electronic Engineering ,Nanyang Technological University

#Physics#

Coordination-resolved 4f binding energy shift of Pt surface and Pt nanostructures: Skin-depth

Sun Changqing,Yi Sun,Ji Sheng Pan,Yan Wang,Ling-ling Wang

binding energy in the core interior remain their bulk values.

2009-03-12

School of Electrical and Electronic Engineering, Nanyang Technological University,Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link,,Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link,,School of Physics and Microelectronics Science, Hunan University,,School of Physics and Microelectronics Science, Hunan University,

#Physics#

Coordination-resolved C-C bond length and C-1s binding energy: energy: from atomic carbon, graphene

Sun Changqing,Nie Yanguang ,Sun Yi ,Pan Jisheng

and the C-1s binding energy shifts positively by values from 1.32 to 3.32 eV with respect to the C-1s

2009-02-10

Nanyang Technological University,Nanyang Technological University,Nanyang Technological University,Nanyang Technological University

#Physics#

Surfaec and nanosolid core level shift

Sun Changqing

Identifying the origin for core-level binding-energy shift induced by surface relaxation or

2005-07-11

Nanyang Technological University

#Physics#

Size-induced 2p3/2 and 3d5/2 energy levels shift of Ni nanostructures: Broken-bond-induced local strain and quantum trapping

Sun Changqing

Size dependence of the L(2p3/2) and M(3d5/2) energy levels shifts of Ni nanostructures deposited on TiO2 substrate has been measured using the Auger photoelectron coincidence spectroscopy (APECS) and analyzed on the base of the bond order-length-strength (BOLS) correlation mechanism [Sun, C.Q. Prog. Solid State Chem. 2007, 35, 1]. Correlation between the APECS involved L and M lines and the Auger kinetic energy EK has been established, clarifying that the energy shift of the Auger parameter, or the energy shift of the sum of EK and EL, is twice that of the M level. Using this approach, we have been able to estimate energies of these levels for an isolated Ni atom and their corresponding shifts upon bulk formation. Findings confirm that the size-induced electronic energy shifts of nanostructures originate from the broken-bond-induced local strain and the associated quantum trapping in the surface of skin depth.

2009-02-26

Nanyang Technological University and Agency for Science（0）

Technology and Research（10772157）

Nature Science Foundation（0）

School EEE, NTU, Singapore

#Physics#

The 2p3/2 binding energy shift of Fe surface and Fe nanoparticles

Wang Yan,Wang Lingling,Sun Changqing

Analysis of the 2p3/2 core-level shift of Fe surface and nanoparticles based on the bond order-length-strength (BOLS) correlation [Sun CQ, Prog Solid State Chem 35, 1 (2007)] has turned out that the Fe 2p3/2 energy shifts positively by 2.17 eV from the atomic value of 704.52 eV to the bulk of 706.69 eV and that a further 0.32 and 0.16 eV shift occurs, respectively, to the top and the second atomic layers. Consistency between theory and experiments clarifies the dominance of the broken-bond-induced local strain and quantum trapping in perturbing the Hamiltonian and hence the observed Fe 2p3/2 energy shifts.

2009-07-06

Hunan University,Hunan University,School of Electrical & Electronic Engineering, Nanyang Technological University

#Physics#

Network structure of electron states in superconducting cuprates systems and its binding energy

LI Qiang

network of criss-cross loops is identified and substantial tolerance to requirements on binding energy

2012-11-30

Jinheng Law Firm, Beijing 100191

#Physics#

Size effect on the melting point and E-4f level shift of gold nanosolid

Sun Changqing, H. L. Bai,S. Li,B. K. Tay,E. Y. Jiang

bond-energy increase dictate these changes. The increase of binding energy density per unit volume in the

2005-08-05

Nanyang Technological University,Tianjin University,Nanyang Technological University,Nanyang Technological University,Tianjin University

#Physics#

GPIbα-VWF复合物突变的热稳定性和结合能分析

李娜,李趣欢,李圳阳

2014-03-05

目的: GPIbα-A1相互作用介导血小板的初始黏附是凝血过程中关键的第一步。血管性血友病因子VWF中A1结构域的突变常常伴随血管性血友病VWD的发生。预测A1结构域突变对GPIbα-A1相互作用的影响，对于深入了解血管性血友病及血栓形成的生理和病理过程，均具重要意义。方法：本研究采用虚拟突变和分子动力学模拟的方法，运用Discovery Studio和NAMD等工具，研究A1结构域突变的稳定性以及其与GPIbα之间的结合能，并探索酸碱性对GPIbα-A1结合过程中的作用。结果： 1) A1突变体的稳定性表明自然状态下相对稳定的突变更容易发生，Cys和Ile诱发的突变发生的可能性相对更高，突变对氨基酸的类型具有一定的偏好性。2）野生型较突变型的结合自由能大，表明A1突变型较野生型更为稳定；2B型的A1突变体与GPIbα的结合能力强于野生型。3）一定的生理PH范围内，突变体结合能与PH值呈负相关关系。结论：本研究对于A1突变 对GPIbα-A1相互作用的稳定性和结合能研究的结果，为血管性血友病机理和创新药物的开发提供有效信息。

华南理工大学生物科学与工程学院,华南理工大学生物科学与工程学院,华南理工大学生物科学与工程学院

#生物学#