Shcheslavskiy V, Petrov GI, Saltiel S, Yakovlev VV. Quantitative characterization of aqueous solutions probed by the third-harmonic generation microscopy.
J Struct Biol 2005;
147:42-9. [PMID:
15109604 DOI:
10.1016/j.jsb.2003.10.015]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2003] [Revised: 10/15/2003] [Indexed: 10/26/2022]
Abstract
Third-harmonic microscopy is one of the emerging techniques for noninvasive microscopic imaging of biological structures. We use a novel technique for nonlinear optical material characterization and study the effect of different environment and the structural sensitivity of the third harmonic. In particular, a transformation of collagen in solution is observed for the first time using third-harmonic generation. We also study the ultimate limits of the third harmonic to detect micro- and nanoscopic features inside living cells and find that structures as small as 50 nm can be detected using the current level of technology.
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