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Fig. 4 | EPJ Techniques and Instrumentation

Fig. 4

From: Tip-enhanced Raman spectroscopy: principles and applications

Fig. 4

Preparation of TERS tips by template-stripping and electrochemical etching methods. a Schematic diagram showing the template-stripping method to prepare gold tips. b Scanning electron microscopy (SEM) image of the template-stripped gold tip-apex showing a radius of about 10 nm. c Schematic diagram showing the set-up for etching gold tips. d SEM image of an etched gold tip. (a) and (b) are reprinted with permission from reference [37]. Copyright 2012 American Chemical Society. (c) and (d) are reprinted with permission from reference [38], Copyright 2013, American Vacuum Society

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