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. Author manuscript; available in PMC: 2009 Sep 16.
Published in final edited form as: J Biomed Nanotechnol. 2005 Mar 1;1(1):3–17. doi: 10.1166/jbn.2005.004

Fig. 13.

Fig. 13

(a) Schematic of a SWNT tip with attached carboxylic acid groups. (b–d) Chemical mapping with functionalized SWNT tip. (b) Schematic of a patterned substrate consisting of a self-assembled monolayer (SAM) region terminated with methyl groups and surrounded by carboxylic acid-terminated SAM. (c) Tapping mode phase image of the patterned SAM in (b) imaged with a carboxylic acid-terminated SWNT tip, and (d) phase image of a similar substrate imaged with C6H5-terminated SWNT tip. Courtesy of Charles M. Lieber, Harvard University, USA.