Influence of the carrier gas molar mass on the particle formation in a vapor phase.
Influence of the carrier gas molar mass on the particle formation in a vapor phase.
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DOI：
10.1063/1.3204780
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
S. Braun;Frank Römer;Thomas Kraska
中科院分区：
文献类型：
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作者：
S. Braun;Frank Römer;Thomas Kraska
研究了载气摩尔质量对气相中纳米粒子形成的影响。载气气氛的功能是通过与团簇表面的碰撞来调节颗粒温度。本工作的目的是在模拟中优化载气，以便用有效参数的少量气体原子模拟大量载气原子。在这种情况下，与载气的热交换效率取决于其摩尔质量进行了分析。结果发现，对于不同的摩尔质量和不变的相互作用参数，碰撞的效率和数量之间存在竞争。对于太小的摩尔质量，每次碰撞的能量交换太小，而对于太高的质量，载气原子变得非常慢，减少了碰撞的次数。
The influence of the molar mass of a carrier gas on the formation of nanoparticles in the vapor phase is investigated. The function of the carrier gas atmosphere is the regulation of the particle temperature by collisions with the cluster surface. The aim of this work is to optimize the carrier gas in a simulation in order to mimic a large amount of carrier gas atoms by few gas atoms with effective parameters. In this context the efficiency of the heat exchange with the carrier gas depending on its molar mass is analyzed. As a result one finds for varying molar masses and unchanged interaction parameters a competition between the efficiency and the number of the collisions. For too small molar masses the energy exchange per collision is too small while for too high masses the carrier gas atoms become very slow, decreasing the number of collisions.