HOPG/水界面纳米气泡与纳米气层的原子力显微技术研究  

Investigation on nanobubbles and micropancakes at the HOPG/water interface by atomic force microscopy

作　　者：赵彬钰[1,2] 张立娟[1] 张益[1] 李宾[1] 胡钧[1] 

机构地区：[1]中国科学院上海应用物理研究所,物理生物学研究室,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《电子显微学报》2013年第2期122-126,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.10975175;90923002;21073222和11079050);中国科学院知识创新工程重要方向项目(No.KJCX2-EW-N03;No.KJCX2-EW-W09)

摘　　要：纳米气泡在固液界面上的存在已得到基本证实,它是近十年来表面科学领域的研究热点之一。对纳米气泡的自身性质及其影响因素已经开展了多方面的研究,而针对纳米气层的研究相对较少,但它可能是影响纳米气泡稳定性的原因之一。本文利用原子力显微镜的轻敲模式(TMAFM)观测了高序热解石墨(highly ordered pyrolyticgraphite,HOPG)/水界面纳米气泡与气层的形貌特征,并比较了二者的高度和横向尺寸,重点分析了纳米气层在短时间内的变化对其自身和其上的纳米气泡形貌的影响。结果显示,气层收缩变小时,其上的气泡变矮;气层间融合变大时,其上的气泡变高。该结果进一步加深了对纳米气泡和纳米气层及二者间联系的认识,将有助于理解纳米气泡的稳定性。Nanobubbles whose existence at solid-liquid interface has basically been practically verified are an important discovery of surface science in recent ten years.Many studies have been done to investigate their properties and influences.Micropancakes as well as the interaction between them,which might affect the stability of nanobubbles,still remains little known,.In this paper,the morphology of nanobubbles and micropancakes were compared by using atomic force microscopy（AFM）,and the morphology changes of micropancakes with time and its influence on nanobubbles underlying micropancakes were discussed.It can be concluded that nabobubbles increase their height as the underlying micropancakes merge and decrease their height as the underlying micropancakes shrink.The investigations make nanobubbles and micropancakes at the solid-liquid interface more understandable,especially the interactions between them.

关 键 词：纳米气泡 纳米气层 界面 原子力显微镜 稳定性 

分 类 号：O485[理学—固体物理]