Enhanced Evaporation of Sessile Water Droplet on Vertically Standing Ag Nanorods Film

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• 作者：Dhruv P. Singh ; Jitendra P. Singh
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：June 23, 2011
• 年：2011
• 卷：115
• 期：24
• 页码：11914-11919
• 全文大小：891K
• 年卷期：v.115,no.24(June 23, 2011)
• ISSN：1932-7455

文摘

We report the effect of columnar morphology of Ag nanorods film on the evaporation process of sessile water droplets. Water droplets of 3 渭L in volume were deposited over a conventional Ag thin film and columnar Ag nanorods film samples. The temperature of both the samples was maintained at 80 掳C, and the water droplet profile was continuously monitored for a time interval of 10 s, immediately after the deposition. Interestingly, about 90% enhancement in the evaporation rate of water droplet was observed on Ag nanorods film compared to the conventional Ag thin film. The observed increase in the evaporation rate is explained by an enormous increment in the effective three phase contact line of water droplet for the columnar surface. The analysis shows a direct dependence of the observed enhancement in the evaporation rate on the size and distribution of the silver nanorods. This study shows a possibility to tune the evaporation rate with an optimized growth of silver nanorods over the solid surfaces.