Nanoplatforms for Plasmon-Induced Heating and Thermometry
authors Debasu, ML; Brites, CDS; Balabhadra, S; Oliveira, H; Rocha, J; Carlos, LD
nationality International
journal CHEMNANOMAT
author keywords Gd2O3:Yb/Er nanorods; gold nanorods; heaters; hyperspectral imaging; thermometers
keywords UP-CONVERSION NANOPARTICLES; PHOTOTHERMAL THERAPY; GOLD NANORODS; ENERGY-TRANSFER; CELL; LUMINESCENCE; NANOSCALE; NANOSTRUCTURES; TEMPERATURE; GENERATION
abstract Plasmonic nanostructures concentrate light and heat within a small volume at the nanoscale, offering potential applications in nanotechnology and biomedicine (e.g., hyperthermia). However, the precise quantification of the actual temperature rise in the vicinity of such nanosystems poses considerable challenges. Here, we present a new heater-thermometer nanoplatform capable of measuring the plasmon-induced local temperature increase of Au nanorods via the ratiometric upconversion of (Gd, Yb, Er)(2)O-3 nanothermometers upon 980 nm laser excitation (up to 102.0 Wcm(-2)). The local temperature rise, 302-548 K (maximum temperature sensitivity 1.22% K-1, uncertainty 0.32K and repeatability > 99%), is assessed using Boltzmann's distribution of the Er3+ (2)H1(11/2) -> I-4(15/2)/S-4(3/2) -> I-4(15/2) intensity ratio. The nanoplatforms are biocompatible with MG-63 and A549 cells and were mapped within the former using hyperspectral imaging, opening up an avenue to monitor the cellular uptake of Ln(3+)-based nanoplatforms.
publisher WILEY-V C H VERLAG GMBH
year published 2016
volume 2
issue 6
beginning page 520
ending page 527
digital object identifier (doi) 10.1002/cnma.201600061
web of science category Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000383773000008

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