银纳米晶与石墨烯/碳纳米管之间的高温浸润特性
he wetting behaviors between Ag nanocrystals and graphene/carbon-nanotubes at elevated temperatures
通过原位电子显微技术研究了银纳米晶与石墨烯、碳纳米管之间在高温下的浸润特性。依靠纳米熔模铸造技术，通过在银纳米晶表面进行碳沉积并退火结晶，获得了纳米尺度石墨烯/碳纳米管-银纳米晶异质界面。通过原位加热，测得了银纳米晶与石墨烯、碳纳米管之间的浸润接触角。实验结果表明，银纳米晶在高温下出现显著升华现象，在远低于其熔点的温度下即开始呈现液态流动性，但其结构却保持完好晶体结构。当金属银的颗粒尺寸大于20nm时，其与石墨烯、碳纳米管之间的接触角约为124 -125 ，与宏观块材相似；当颗粒尺寸小于15-20nm时，表面效应和尺寸效应变得显著，其与石墨烯、碳纳米管的接触角开始逐渐减小。
In this paper, the wetting behaviors between Ag nanocrystals and graphene/carbon nanotubes were in situ investigated through an in-situ transmission electron microscope. Ag nanocrystals were found to sublimate and behave as liquid at a temperature far below the melting point. The contact angles between Ag nanocrystals and graphene/carbon-nanotubes represent significant size effect. For Ag nanocrystals have sizes larger than 20 nm, the contact angle is around 124 -125 , similar to that of bulk molten silver on graphite. While for Ag nanocrystals smaller than 15-20 nm, the contact angle represents a gradual decrease with the decreasing particle size.
尹奎波、申畅、于涵、贺龙兵、王禹欣、连瑞雪、姜程程
材料科学金属学、热处理铸造
接触角原位电子显微学石墨烯碳纳米管银纳米晶
contact anglein-situ TEMgraphenecarbon-nanotubeAg nanocrystal
尹奎波,申畅,于涵,贺龙兵,王禹欣,连瑞雪,姜程程.银纳米晶与石墨烯/碳纳米管之间的高温浸润特性[EB/OL].(2016-05-27)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201605-1409.点此复制
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