Life and Environment Science College, Shanghai Normal University, Shanghai 200234, China.
Chemphyschem. 2012 Jun 4;13(8):2115-8. doi: 10.1002/cphc.201100912. Epub 2012 Apr 13.
In recent years, the possibility of nanobubbles at the solid-liquid interface has drawn wide attention in the scientific community and industry. Thus the search for evidences for the existence of nanobubbles became a scientific hotspot. To produce interfacial nanobubbles, a systematic experiment, called the temperature difference method, is carried out by replacing low temperature water (LTW) with high temperature water (HTW) at the highly-oriented pyrolytic graphite (HOPG)-water interface. When LTW (4 °C) is mixed with HTW (25-40 °C), nanobubbles are observed by atomic force microscopy (AFM), and their size, density and total volume per square micrometer are measured. Furthermore, pancake-like gas layers and the coexistence of nanobubbles on top of the pancake layers are also observed.
近年来，固-液界面纳米气泡的可能性引起了科学界和工业界的广泛关注。因此，寻找纳米气泡存在的证据成为了一个科学热点。为了产生界面纳米气泡，通过在高度取向的热解石墨（HOPG）-水界面上用高温水（HTW）取代低温水（LTW），进行了一项称为温差法的系统实验。当 LTW（4°C）与 HTW（25-40°C）混合时，通过原子力显微镜（AFM）观察到纳米气泡，并测量了它们的尺寸、密度和每平方微米的总体积。此外，还观察到了类煎饼状的气体层和纳米气泡在其顶部共存的现象。
