The collision of C_(60) with a graphite(0001)surface has been investigated by molecular dynamics simulation with TLHL potential.At an impact energy of 90eV,the C_(60) buckyball first deformed to a disc-like structure ...The collision of C_(60) with a graphite(0001)surface has been investigated by molecular dynamics simulation with TLHL potential.At an impact energy of 90eV,the C_(60) buckyball first deformed to a disc-like structure and then transformed back to its original shape and recoiled slowly.No dissociation of the C_(60) was observed on the time scale of the simulation.Unlike a single-atom-surface collision,the C_(60)-surface interaction is a highly inelastic process.展开更多
A many-body hybrid potential,which is the combination of the tight-binding and the Moliere potential,has been developed.The surface damages at atomic scale caused by gold clusters,with energy of 3250eV,impacting on go...A many-body hybrid potential,which is the combination of the tight-binding and the Moliere potential,has been developed.The surface damages at atomic scale caused by gold clusters,with energy of 3250eV,impacting on gold crystals have been investigated by molecular dynamics simulation.The results are compared with that from the two-body Moliere potential.展开更多
The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 color...The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 coloring elements in Ru porcelain is determined by neutron activation analysis (NAA), which showed that iron is the major coloring element. Mossbauer spectroscopy analysis shows that the iron element in the glaze exists in the form of structural iron (Fe2+, Fe3+). The quantitative relationship between the main wavelength of glaze in various colors and the relative content of structural iron (Fe2+/Fe3+) is determined. Thus the coloring mechanism of Ru porcelain is investigated entirely.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘The collision of C_(60) with a graphite(0001)surface has been investigated by molecular dynamics simulation with TLHL potential.At an impact energy of 90eV,the C_(60) buckyball first deformed to a disc-like structure and then transformed back to its original shape and recoiled slowly.No dissociation of the C_(60) was observed on the time scale of the simulation.Unlike a single-atom-surface collision,the C_(60)-surface interaction is a highly inelastic process.
基金Supported by the National Natural Science Foundation of China,and the Joint Laboratory for Material Modification by Laser,Ion and Election Beams,Dalian University of Technology.
文摘A many-body hybrid potential,which is the combination of the tight-binding and the Moliere potential,has been developed.The surface damages at atomic scale caused by gold clusters,with energy of 3250eV,impacting on gold crystals have been investigated by molecular dynamics simulation.The results are compared with that from the two-body Moliere potential.
基金This work was supported by the National Natural Science Foundation of China (Grant Nos. 59872032 and 10175053)the Open Laboratory of Nuclear Analysis Techniques of the Chinese Academy of Sciences (Grant No. 99B006)the Science and Technology Committee
文摘The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 coloring elements in Ru porcelain is determined by neutron activation analysis (NAA), which showed that iron is the major coloring element. Mossbauer spectroscopy analysis shows that the iron element in the glaze exists in the form of structural iron (Fe2+, Fe3+). The quantitative relationship between the main wavelength of glaze in various colors and the relative content of structural iron (Fe2+/Fe3+) is determined. Thus the coloring mechanism of Ru porcelain is investigated entirely.
