Interfacial nanobubbles produced by long-time preserved cold water  

作　　者：周利民 王硕 邱杰 王磊 王兴亚 李宾 张立娟 胡钧 

机构地区：[1]Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]School of Physical Science and Technology Shanghai Tech University [4]Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences

出　　处：《Chinese Physics B》2017年第10期395-403,共9页中国物理B（英文版）

基　　金：supported by the Key Laboratory of Interfacial Physics and Technology,Chinese Academy of Sciences,the Open Research Project of the Large Scientific Facility of the Chinese Academy of Sciences;the National Natural Science Foundation of China(Grant Nos.11079050,11290165,11305252,11575281,and U1532260);the National Key Basic Research Program of China(Grant Nos.2012CB825705 and 2013CB932801);the National Natural Science Foundation for Outstanding Young Scientists,China(Grant No.11225527);the Shanghai Academic Leadership Program,China(Grant No.13XD1404400);the Program of the Chinese Academy of Sciences(Grant Nos.KJCX2-EW-W09 and QYZDJ-SSW-SLH019)

摘　　要：Interfacial gaseous nanobubbles which have remarkable properties such as unexpectedly long lifetime and significant potential applications, are drawing more and more attention. However, the recent dispute about the contamination or gas inside the nanobubbles causes a large confusion due to the lack of simple and clean method to produce gas nanobubbles. Here we report a convenient and clean method to effectively produce interfacial nanobubbles based on a pure water system. By adding the cold water cooled at 4 ℃ for more than 48 h onto highly oriented pyrolytic graphite （HOPG） surface, we find that the average density and total volume of nanobubbles are increased to a high level and mainly dominated by the concentrations of the dissolved gases in cold water. Our findings and methods are crucial and helpful for settling the newly arisen debates on gas nanobubbles.Interfacial gaseous nanobubbles which have remarkable properties such as unexpectedly long lifetime and significant potential applications, are drawing more and more attention. However, the recent dispute about the contamination or gas inside the nanobubbles causes a large confusion due to the lack of simple and clean method to produce gas nanobubbles. Here we report a convenient and clean method to effectively produce interfacial nanobubbles based on a pure water system. By adding the cold water cooled at 4 ℃ for more than 48 h onto highly oriented pyrolytic graphite （HOPG） surface, we find that the average density and total volume of nanobubbles are increased to a high level and mainly dominated by the concentrations of the dissolved gases in cold water. Our findings and methods are crucial and helpful for settling the newly arisen debates on gas nanobubbles.

关 键 词：NANOBUBBLES atomic force microscopy gas saturation SOLUBILITY 

分 类 号：O485[理学—固体物理]