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Updated: Jul 22, 2026

13:39
Optical Trapping of Nanoparticles
Published on: January 15, 2013
Infrared spectroscopic mapping of single nanoparticles and viruses at nanoscale resolution
Markus Brehm1, Thomas Taubner, Rainer Hillenbrand
1Max-Planck-Institut für Biochemie & Center for NanoScience (CeNS), München, Germany.
Nano Letters
|July 13, 2006
Abstract:
We demonstrate that scattering near-field microscopy (s-SNOM) can determine infrared "fingerprint" spectra of individual poly(methyl methacrylate) nanobeads and viruses as small as 18 nm. Amplitude and phase spectra are found surprisingly strong, even at a probed volume of only 10(-20) l, and robust in regard to particle size and substrate. This makes infrared spectroscopic s-SNOM a versatile tool for chemical and-in the case of protein-secondary-structure identification.

