Control of amorphous solid water morphology using molecular beams. II. Ballistic deposition simulations
Control of amorphous solid water morphology using molecular beams. II. Ballistic deposition simulations
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使用分子束控制无定形固体水形态。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
B. D. Kay
中科院分区：
文献类型：
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作者：
G. Kimmel;Z. Dohnálek;K. Stevenson;R. S. Smith;B. D. Kay
进行了薄膜生长的弹道沉积模拟。模拟的结果进行了比较，N2吸附多孔非晶固体水薄膜的实验。模拟结果与实验观察结果定性一致：薄膜的孔隙率是通过使用准直光束来蒸汽存款膜控制。具有正常或接近正常生长角（θ <$0 °）的膜相对致密且光滑。具有较大生长角的膜是高度多孔的，并且平均孔径随着生长角的增加而增加。模拟表明，对于大于θ 70°的生长角，吸附到最大的孔隙是不可能的，导致实验观察到的最大N2吸附的多孔无定形固体水在θ=70°。
Ballistic deposition simulations of thin film growth were performed. The results of the simulations are compared to experiments of N2 adsorption by porous amorphous solid water thin films. The simulations are in qualitative agreement with the experimental observations: The porosity of the thin films is controlled by using a collimated beam to vapor deposit the films. Films with normal or near normal growth angles (θ∼0°) are relatively dense and smooth. Films with larger growth angles are highly porous and the average pore size increases as the growth angle increases. The simulations indicate that for growth angles greater than ∼70°, adsorption into the largest pores is not possible leading to the experimentally observed maximum in N2 adsorption by porous amorphous solid water at θ=70°.