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. Author manuscript; available in PMC: 2012 Oct 18.
Published in final edited form as: Acc Chem Res. 2011 Apr 29;44(10):914–924. doi: 10.1021/ar200061q

FIGURE 4.

FIGURE 4

Depth capability of SLN mapping with AuNCs. PA images taken (A) before and (B-E) after the injection of AuNCs for: (B) 28 min; (C) 126 min with a layer of chicken breast tissue placed on axillary region (imaging depth: 10 mm); (D) 165 min with the second layer of chicken breast tissue (imaging depth: 21 mm); (E) 226 min with the third layer of chicken breast tissue (imaging depth: 33 mm). (F) PA B-scan with 20 times signal averaging, showing the SLN located 33 mm deep. (G) The amplitude variations of PA signals over imaging depths. BV: blood vessel.21