title: Moving nanoparticles with Raman scattering.
abstract: We show how to change optically the distance between two protein-linked gold nanoparticles by Raman-induced motion of the linker protein. Rayleigh scattering spectroscopy of the coupled-particle plasmon allows us to compare the inter-nanoparticle distance of individual protein-linked gold nanoparticle dimers before and after surface-enhanced Raman scattering (SERS). We find that low-intensity (50 microW/microm2) laser light in resonance with the nanoparticle-dimer plasmon provokes a change of the inter-nanoparticle distance on the order of 0.5 nm whenever SERS from the proteins connecting the nanoparticles can be observed.
authors: Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 Munich, Germany.
authors: M
authors: M
authors: Ringler
authors: T A
authors: TA
authors: Klar
authors: A
authors: A
authors: Schwemer
authors: A S
authors: AS
authors: Susha
authors: J
authors: J
authors: Stehr
authors: G
authors: G
authors: Raschke
authors: S
authors: S
authors: Funk
authors: M
authors: M
authors: Borowski
authors: A
authors: A
authors: Nichtl
authors: K
authors: K
authors: Kürzinger
authors: R T
authors: RT
authors: Phillips
authors: J
authors: J
authors: Feldmann
mesh_terms: D003460:Crystallization / Q000379:methods; D004307:Dose-Response Relationship, Radiation; D006046:Gold / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008846:Micromanipulation / Q000379:methods*; D009038:Motion; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D052898:Optical Tweezers; D010316:Particle Size; D011829:Radiation Dosage; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D006046:Gold