A New Generation of Primary Luminescent Thermometers Based on Silicon Nanoparticles and Operating in Different Media
authors Botas, AMP; Brites, CDS; Wu, J; Kortshagen, U; Pereira, RN; Carlos, LD; Ferreira, RAS
nationality International
journal PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
author keywords environmental robustness; luminescent thermometry; primary thermometry; self-calibrated thermometers; silicon nanoparticles
keywords UP-CONVERSION LUMINESCENCE; OPTICAL SENSORS; LIVING CELLS; TEMPERATURE; NANOTHERMOMETERS; NANOCRYSTALS; PHOTOLUMINESCENCE; NANOSCALE; EMISSION; RANGE
abstract Luminescence nanothermometry is nowadays a highly-dynamic research topic that is being driven by the challenging demands arising from dissimilar areas such as microelectronics, microfluidics and nanomedicine. Although the technique is rapidly evolving from the initial breakthrough to real applications, there are still major challenges regarding the conciliation of nanometric probes with the high sensitivity and predictability of the thermal response of the system. In the past five years, luminescent thermometers operating at the nanoscale, where the conventional methods are ineffective, have emerged as a very active field of research. Luminescent silicon nanoparticles (SiNPs) are a promising choice for nanothermometry, combining the Si biocompatibility with the compatibility with the current microelectronic technology. Here, the thermal dependence of the emission peak position of SiNPs, used as the thermometric parameter, is well-described by the Varshni's law, enabling the development of a self-calibrated nanothermometer with a calibration curve predicted by a well-stablished state equation, avoiding new calibration procedures whenever the thermometer operates in different media. For the first time, temperature sensing using SiNPs-based luminescent thermometers in different media without the need of new calibration procedures is demonstrated. The thermometer reveals reversibility and repeatability higher than 99.98%, and a maximum relative sensitivity of 0.04% K-1.
publisher WILEY-V C H VERLAG GMBH
issn 0934-0866
year published 2016
volume 33
issue 10
beginning page 740
ending page 748
digital object identifier (doi) 10.1002/ppsc.201600198
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000386618100004
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journal impact factor 4.384
5 year journal impact factor 4.059
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