Nanobubbles at the interface of hopg and ethanol solution

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Title: Nanobubbles at the interface of hopg and ethanol solution
Author(s): Zhang, X. H.; Wu, Z. H.; Zhang, X. D.; Li, G.; Hu, J.
Abstract: Recently, it has been put forward that bubbles of nanometer scale (nanobubbles) can exist on solid surfaces immersed in aqueous solution, especially on hydrophobic sub-strates. This interfacial phenomenon has invited extensive interests in both scientific and commercial fields. Experimental evidence including the study of atomic force microscopy (AFM) has been provided to support the existence of nanobubbles. But, there are still many debates in this field. In this paper, a degassing process is combined with direct AFM imaging to prove that the features in the AFM images are nanobubbles. It is found that the morphology of nanobubbles on the highly oriented pyrolytic graphite (HOPG) surface was noticeably deformed during contact mode imaging and their size is extremely sensitive to the imaging force of AFM. By observing nanobubbles in ethanol solution of different concentrations, we found that ethanol solution more concentrated than 20% (V/V) may have a destructive effect on nanobubbles.
Publication type: Journal article
Source: International Journal of Nanoscience, Vol. 4, no. 3 (Jun 2005), pp. 399-407
Publication year: 2005
FOR Code(s): 1007 Nanotechnology
Keyword(s): AFM; Atomic force microscopy; Bubbles (in fluids); Colloids; Degases; Ethanol; Graphite; Highly oriented pyrolytic graphite; HOPG; Interfaces (materials); Nanobubbles; Nanostructured materials; Nanotubes; Solutions; Surface phenomena
Publisher: World Scientific Publishing
ISSN: 0219-581X
Publisher URL: http://dx.doi.org/10.1142/s0219581x05003152
Peer reviewed