Interfacial gas nanobubbles or oil nanodroplets?
Wang, XY; Zhao, BY; Hu, J; Wang, S; Tai, RZ; Gao, XY; Zhang, LJ
2017
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
卷号19期号:2页码:1108-1114
文章类型期刊论文
摘要The existence of nanobubbles at a solid-liquid interface with high stability has been confirmed by myriad experimental studies, and their gaseous nature has also been extensively verified. However, nanodroplets of polydimethylsiloxane (PDMS) recently observed in the atomic force microscopy (AFM) measurement of nanobubbles plague the nanobubble community. It may easily lead to wrong interpretations of the AFM results and thus hinders further application of the already widely used AFM in nanobubble studies. Therefore, finding a direct experimental solution to distinguish nanobubbles from nanodroplets in AFM measurements is a matter of great urgency. Herein, we first developed an effective and reproducible method to produce PDMS nanodroplets at the highly ordered pyrolytic graphite (HOPG)/water interface. From their size, contact angle, and stiffness, the formed PDMS nanodroplets are not distinguishable from nanobubbles. However, the force curves on these two objects are strikingly different from each other, i.e., a peculiar plateau in both the approach and retraction curves was found on nanobubbles whereas they changed linearly between the jump-in and jump-off point on PDMS nanodroplets. Thus, the present study not only provided a simple and effective procedure to generate PDMS nanodroplets but also paved a simple practical and in situ way to discriminate nanobubbles from the PDMS nanodroplets by direct AFM force measurements.
DOI10.1039/c6cp05137e
收录类别SCI
语种英语
WOS记录号WOS:000392399400018
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27357
专题中科院上海应用物理研究所2011-2018年
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Wang, XY,Zhao, BY,Hu, J,et al. Interfacial gas nanobubbles or oil nanodroplets?[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2017,19(2):1108-1114.
APA Wang, XY.,Zhao, BY.,Hu, J.,Wang, S.,Tai, RZ.,...&Zhang, LJ.(2017).Interfacial gas nanobubbles or oil nanodroplets?.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,19(2),1108-1114.
MLA Wang, XY,et al."Interfacial gas nanobubbles or oil nanodroplets?".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 19.2(2017):1108-1114.
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