Temperature mapping near plasmonic nanostructures using fluorescence polarization anisotropy
Year: 2009
Type: article
Abstract: We report on a thermal imaging technique based on fluorescence polarization anisotropy measurements, which enables mapping the local temperature near nanometer-sized heat sources with 300 nm spatial resolution and a typical accuracy of 0.1 degrees C. The principle is demonstrated by mapping the temperature landscape around plasmonic nano-structures heated by near-infrared light. By assessing directly the molecules' Brownian dynamics, it is shown that fluorescence polarization anisotropy is a robust and reliable method which overcomes the limitations of previous thermal imaging techniques. It opens new perspectives in medicine, nanoelectronics and nanofluidics where a control of temperature of a few degrees at the nanoscale is required.
Source: Optics Express
DOI: 10.1364/oe.17.003291
Authors: G. Baffou, M. P. Kreuzer, F. Kulzer, R. Quidant
Institution: Institute of Photonic Sciences
Language: English
Subfield: Biophysics
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W2064188111