Cavitation Laboratory, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore.
Langmuir. 2016 Dec 6;32(48):12710-12715. doi: 10.1021/acs.langmuir.6b02519. Epub 2016 Nov 14.
The widespread application of surface-attached nanobubbles and nanodroplets in biomedical engineering and nanotechnology is limited by numerous experimental challenges, in particular, the possibility of contamination in nucleation experiments. These challenges are complicated by recent reports that it can be difficult to distinguish between nanoscale drops and bubbles. Here we identify clear differences in the mechanical responses of nanobubbles and nanodroplets under various modes of AFM imaging that subject the objects to predominantly vertical or lateral forces. This allows us to distinguish among nanodroplets, nanobubbles, and oil-covered nanobubbles in water.
表面附着的纳米气泡和纳米液滴在生物医学工程和纳米技术中的广泛应用受到许多实验挑战的限制，特别是在成核实验中存在污染的可能性。最近的报告表明，纳米尺度的液滴和气泡之间很难区分，这使得这些挑战变得更加复杂。在这里，我们在各种原子力显微镜成像模式下识别出纳米气泡和纳米液滴的机械响应的明显差异，这些模式主要使物体受到垂直或侧向力的作用。这使我们能够区分水中的纳米液滴、纳米气泡和油覆盖的纳米气泡。
