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.
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)
