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Thermoresponsive Polymeric Nanolenses Magnify the Thermal Sensitivity of Single Upconverting Nanoparticles

Author
Lu, Dasheng; Rubio Retama, Jorge; Marin, Riccardountranslated; Marqués, Manuel I.; Calderón, Oscar G.; Melle, Sonia; Haro González, Patriciauntranslated; Jaque García, Danieluntranslated
Entity
UAM. Departamento de Física de Materiales
Publisher
Wiley
Date
2022-07-30
Citation
10.1002/smll.202202452
Small 18.34 (2022): 2202452
 
 
 
ISSN
1613-6810 (print); 1613-6829 (online)
DOI
10.1002/smll.202202452
Funded by
This work was supported by the Ministerio de Ciencia e Innovación de España (PID2019-106211RB-I00 PID2019-105195RA-I00 and MAT2017- 83111R), by the Comunidad de Madrid (S2017/BMD-3867 RENIM-CM), co-financed by European Structural and Investment Fund and by the Universidad Autónoma de Madrid and Comunidad Autónoma de Madrid (SI1/PJI/2019-00052 and PR38/21-36 ANTICIPA-CM). D.L. acknowledges a scholarship from the China Scholarship Council (201808350097). J.R.B. acknowledges the support from Carl Tryggers Foundation (CTS18:229). M.I.M acknowledges financial support from the Spanish Ministerio de Ciencia e Innovación, through the “María de Maeztu” Programme for Units of Excellence in R&D (CEX2018-000805-M) and the MELODIA PGC2018-095777-B-C22 projec
Project
Gobierno de España. MAT2017-83111R; Gobierno de España. PGC2018-095777-B-C22
Editor's Version
https://doi.org/10.1002/smll.202202452
Subjects
Luminescent nanothermometry; Optical force; Optical trapping; Poly(N-isopropylacrylamide); Surface modification; Thermal sensitivity; Upconverting nanoparticles; Física
URI
http://hdl.handle.net/10486/704369
Rights
© 2022 The Authors

Licencia Creative Commons
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.

Abstract

Lanthanide-based upconverting nanoparticles (UCNPs) are trustworthy workhorses in luminescent nanothermometry. The use of UCNPs-based nanothermometers has enabled the determination of the thermal properties of cell membranes and monitoring of in vivo thermal therapies in real time. However, UCNPs boast low thermal sensitivity and brightness, which, along with the difficulty in controlling individual UCNP remotely, make them less than ideal nanothermometers at the single-particle level. In this work, it is shown how these problems can be elegantly solved using a thermoresponsive polymeric coating. Upon decorating the surface of NaYF4:Er3+,Yb3+ UCNPs with poly(N-isopropylacrylamide) (PNIPAM), a >10-fold enhancement in optical forces is observed, allowing stable trapping and manipulation of a single UCNP in the physiological temperature range (20–45 °C). This optical force improvement is accompanied by a significant enhancement of the thermal sensitivity— a maximum value of 8% °C+1 at 32 °C induced by the collapse of PNIPAM. Numerical simulations reveal that the enhancement in thermal sensitivity mainly stems from the high-refractive-index polymeric coating that behaves as a nanolens of high numerical aperture. The results in this work demonstrate how UCNP nanothermometers can be further improved by an adequate surface decoration and open a new avenue toward highly sensitive single-particle nanothermometry
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Google™ Scholar:Lu, Dasheng - Rubio Retama, Jorge - Marin, Riccardo - Marqués, Manuel I. - Calderón, Oscar G. - Melle, Sonia - Haro González, Patricia - Jaque García, Daniel

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  • Producción científica en acceso abierto de la UAM [18125]

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