Effect of Etchant Diffusion on Tip Profiles of Glass Fiber Probes

Authors: Yihong, Wang; Zhiyong, Yu; Tan, Yibin; Ning, Gu; Wesche, K.D.

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 4, April 2006 , pp. 1185-1187(3)

Publisher: American Scientific Publishers

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Abstract:

The tips of the probes are the key components in scanning probe microscopes and their applications in nano-scale imaging and nanofabrications. We investigated first the change of near-field scanning optical microscopy probe tips from optical fiber against time by chemical static etching. Several coverlayer-hydrofluoric acid aqueous solution systems and their possible factors affecting the tips' profile were studied. Tips with shorter tapers, larger conical aperture angles, and reproducible shapes were successfully obtained in high yields. It was found that the taper profiles were affected to a great extent by the one-dimensional linear diffusion of etchants in the coverlayer caused by concentration gradients and convection.

Keywords: CHEMICAL ETCHING; DIFFUSION; TIP PROFILE; GLASS FIBER PROBE

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jnn.2006.177

Publication date: 2006-04-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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