Quantitative optical trapping of single gold nanorods.
basic_science · Level V
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- Record sourced from PubMed, PMID 18720978.
- Also identified by DOI 10.1021/nl802053h.
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Abstract
We report a quantitative analysis of the forces acting on optically trapped single gold nanorods. Individual nanorods with diameters between 8 and 44 nm and aspect ratios between 1.7 and 5.6 were stably trapped in three dimensions using a laser wavelength exceeding their plasmon resonance wavelengths. The interaction between the electromagnetic field of an optical trap and a single gold nanorod correlated with particle polarizability, which is a function of both particle volume and aspect ratio.