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国家自然科学基金(s10825520)

作品数:3 被引量:3H指数:1
发文基金:国家自然科学基金上海市教育委员会重点学科基金更多>>
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DIFFUSING OF AN AMMONIA MOLECULE IN WATER IN A VERY SHORT TIME PERIOD被引量:1
2012年
The diffusion of an ammonia molecule (NH3) in water was investigated by molecular dynamic simulations. It is found that the diffusion shows negative correlation with its dipole orientation.
SHENG NanTU Yu-songGUO PanWAN Rong-zhengFANG Hai-ping
关键词:DIFFUSIONAMMONIACORRELATION
Asymmetric transportation induced by thermal noise at the nanoscale被引量:3
2012年
Based on a simple model, we theoretically show that asymmetric transportation is possible in nanoscale systems experiencing thermal noise without the presence of extemal fluctuations. The key to this theoretical advance is that the correlation lengths of the thermal fluctuations become significantly long for nanoscale systems. This differs from macroscopic systems in which the thermal noises are usually treated as white noise. Our observation does not violate the second law of thermodynamics, since at the nanoscale, extra energy is required to keep the asymmetric structure against thermal fluctuations.
WAN RongZhengHU JunFANG HaiPing
关键词:RATCHETNANOSCALE
Concentration of nitrogen molecules needed by nitrogen nanobubbles existing in bulk water
2013年
This paper investigates the stability of nitrogen nanobubbles under dif~ ferent concentrations of nitrogen molecules by molecular dynamics simulations. It is found that the stability of nanobubbles is very sensitive to the concentration of nitrogen molecules in water. A sharp transition between disperse states and assemble states of nitrogen molecules is observed when the concentration of nitrogen molecules is changed. The relevant critical concentration of nitrogen molecules needed by the existing nitrogen nanobubbles is analyzed.
张萌涂育松方海平
关键词:NANOBUBBLECONCENTRATIONSTABILITY
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