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Guided motion of short carbon nanotube driven by non-uniform electric field
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作者 徐震 胡国辉 +1 位作者 王志亮 周哲玮 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2014年第5期535-540,共6页
The molecular dynamics simulations are performed to show that in aque- ous environments, a short single-walled carbon nanotube (SWCNT) guided by a long SWCNT, either inside or outside the longer tube, is capable of ... The molecular dynamics simulations are performed to show that in aque- ous environments, a short single-walled carbon nanotube (SWCNT) guided by a long SWCNT, either inside or outside the longer tube, is capable of moving along the nanotube axis unidirectionally in an electric field perpendicular to the carbon nanotube (CNT) axis with the linear gradient. The design suggests a new way of molecule transportation or mass delivery. To reveal the mechanism behind this phenomenon, the free energy profiles of the system are calculated by the method of the potential of mean force (PMF). 展开更多
关键词 guided motion carbon nanotube (CNT) electric field with linear gradient potential of mean force (PMF)
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An explanation of the elliptic flow difference between proton and anti-proton from the UrQMD model with hadron potentials
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作者 Qing Feng Li Yong Jia Wang +1 位作者 Xiao Bao Wang Cai Wan Shen 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2016年第3期60-65,共6页
The time evolution of both proton and anti-proton v2 flows from Au+Au collisions at √SNN=7.7 GeV are examined by using both pure cascade and mean-field potential versions of the UrQMD model. Due to a stronger repuls... The time evolution of both proton and anti-proton v2 flows from Au+Au collisions at √SNN=7.7 GeV are examined by using both pure cascade and mean-field potential versions of the UrQMD model. Due to a stronger repulsion at the early stage introduced by the repulsive potentials and hence much less annihilation probabilities, anti-protons are frozen out earlier with smaller v2 values. Therefore, the experimental data of anti-proton v2 as well as the flow difference between proton and anti-proton can be reasonably described with the potential version of UrQMD. 展开更多
关键词 elliptic flow difference UrQMD mean field potential annihilation process
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