The depletion interactions between two large-spheres immersed in a fluid of small spheres under unsymmetrical geometrical confinement are studied through the acceptance ratio method. The numerical results show that no...The depletion interactions between two large-spheres immersed in a fluid of small spheres under unsymmetrical geometrical confinement are studied through the acceptance ratio method. The numerical results show that no matter whether the volume fraction is large or small, both the depletion potential and depletion force are affected by the presence of the two plates; the closer the two large spheres are to the plate, the larger the effects of the unsymmetrical confinements.展开更多
The Raman scattering in polydiacetylene chains is investigated. For conjugated polymerchains, there is a large gap with discrete Raman active phonon modes in it which are notstrongly coupled to the electron system. It...The Raman scattering in polydiacetylene chains is investigated. For conjugated polymerchains, there is a large gap with discrete Raman active phonon modes in it which are notstrongly coupled to the electron system. It is, therefore, reasonable to restrict the treatmentto the first-order electron-phonon interaction. For emission of a single phonon, the cross-section is related to a 3-particle Green function that is derived from the Hartree-Fock andrandom phase approximation frame, the Raman scattering amplitude is calculated numeri-cally, and the results are compared with the experimental data.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant No 10375024） and the Science Foundation of Hunan Educational Committee, China
文摘The depletion interactions between two large-spheres immersed in a fluid of small spheres under unsymmetrical geometrical confinement are studied through the acceptance ratio method. The numerical results show that no matter whether the volume fraction is large or small, both the depletion potential and depletion force are affected by the presence of the two plates; the closer the two large spheres are to the plate, the larger the effects of the unsymmetrical confinements.
文摘The Raman scattering in polydiacetylene chains is investigated. For conjugated polymerchains, there is a large gap with discrete Raman active phonon modes in it which are notstrongly coupled to the electron system. It is, therefore, reasonable to restrict the treatmentto the first-order electron-phonon interaction. For emission of a single phonon, the cross-section is related to a 3-particle Green function that is derived from the Hartree-Fock andrandom phase approximation frame, the Raman scattering amplitude is calculated numeri-cally, and the results are compared with the experimental data.
