1320 © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim wileyonlinelibrary.com full papers www.MaterialsViews.com Optical Heating and Temperature Determination of Core– Shell Gold Nanoparticles and Single-Walled Carbon Nanotube Microparticles Alexey Yashchenok,* Admir Masic,* Dmitry Gorin, Olga Inozemtseva, Bong Sup Shim, Nicholas Kotov, Andre Skirtach, and Helmuth Möhwald 1. Introduction Heat generation in plasmonic structures by light irradia- tion represents an upcoming field of research termed ther- moplasmonics. [1] Heating plasmonic nanomaterials has been realized in a number of applications including pho- tothermal cancer therapy, [2] remote release of molecules from polymeric and natural carriers, [3] bioimaging, [4] pat- terning, [5] cell manipulation, [6] optoporation [7] and optoflu- idics. [8] From both fundamental point of view and further applications in such areas as micro- and nanoelectronics, integrated photonics and biomedicine the determination of the local temperature increase in nanostructured systems is an indispensable challenge. [9] In the last two decades a set of approaches have been demonstrated to measure the local temperature rise in plasmonic nanostructures ranging from tip-based measurements to a number of optical assessments on the basis of simultaneous heating and temperature meas- urement. [10] In spite of recent achievements in the nanother- mometry further improvements toward enhanced sensitivity and resolution are required. Optics based methods for determination of the local temperature rise in nanostruc- tured materials are of particular interest, since they can be less invasive, in particularly for biomedicine, more sensitive DOI: 10.1002/smll.201401697 The real-time temperature measurement of nanostructured materials is particularly attractive in view of increasing needs of local temperature probing with high sensitivity and resolution in nanoelectronics, integrated photonics, and biomedicine. Light-induced heating and Raman scattering of single-walled carbon nanotubes with adsorbed gold nanoparticles decorating silica microparticles are reported, by both green and near IR lasers. The plasmonic shell is used as nanoheater, while the single- walled carbon nanotubes are Raman active and serve as a thermometer. Stokes and Anti-Stokes Raman spectra of single-walled carbon nanotubes serve to estimate the effective light-induced temperature rise on the metal nanoparticles. The temperature rise is constant with time, indicating stability of the adsorption density. The effective temperatures derived from Stokes and Anti-Stokes intensities are correlated with those measured in a heating stage. The resolution of the thermal experiments in our study was found to be 5–40 K. Nanothermometers Dr. A. Yashchenok, Prof. H. Möhwald Max Planck Institute of Colloids and Interfaces Department of Interfaces 14424, Potsdam, Germany E-mail: alexey.yashchenok@mpikg.mpg.de Dr. A. Masic Max-Planck Institute of Colloids and Interfaces Department of Biomaterials 14424, Potsdam, Germany E-mail: masic@mpikg.mpg.de Dr. A. Yashchenok, Prof. D. Gorin, Dr. O. Inozemtseva Saratov State University Faculty of Nano- and Biomedical Technologies Saratov 410012, Russia B. S. Shim, N. Kotov University of Michigan Department of Chemical Engineering Department of Materials Science Department of Biomedical Engineering Biointerface Institute Ann Arbor, MI 48109, USA Prof. A. Skirtach Ghent University Department of Molecular Biotechnology and Nano-Bio (NB)-Photonics 9000, Ghent, Belgium small 2015, 11, No. 11, 1320–1327