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Research Papers

Ultrasharp light-scattering resonances of structured nanospheres: effects of size-dependent dielectric functions

[+] Author Affiliations
Boris Khlebtsov

Russian Academy of Sciences, Institute of Biochemistry and Physiology of Plants and Microorganisms, 13 Pr. Entuziastov, Saratov 410049, Russia

Nikolai Khlebtsov

Russian Academy of Sciences, Institute of Biochemistry and Physiology of Plants and Microorganisms, 13 Pr. Entuziastov, Saratov 410049, Russia and Saratov State University, 155 Moskovskaya Street, Saratov 410026, Russia

J. Biomed. Opt. 11(4), 044002 (August 23, 2006). doi:10.1117/1.2337526
History: Received February 01, 2006; Revised March 31, 2006; Accepted March 31, 2006; Published August 23, 2006; Online August 23, 2006
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Recently, reported on the concept of multicolor molecular imaging, which uses resonant light-scattering spectroscopy of multilayer nanospheres. They claimed that the resonance scattering peaks of three-layer nanoshells can be designed so that the ultrasharp widths are as narrow as 10nm. Here we show that such ultrasharp labels cannot be fabricated in reality because the effects of size-dependent dielectric functions result in the five- to tenfold broadening of resonant scattering peaks. Furthermore, contrary to the data of Chen et al. , we did not find any significant advantages of three-layer structures, as compared with the usual silica/metal nanoshells.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Boris Khlebtsov and Nikolai Khlebtsov
"Ultrasharp light-scattering resonances of structured nanospheres: effects of size-dependent dielectric functions", J. Biomed. Opt. 11(4), 044002 (August 23, 2006). ; http://dx.doi.org/10.1117/1.2337526


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