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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hyperspectral imaging thermometry assisted by upconverting nanoparticles: Experimental artifacts and accuracy

Full text
Author(s):
Martinez, Eduardo D. [1, 2] ; Brites, Carlos D. S. [3] ; Urbano, Ricardo R. [4] ; Rettori, Carlos [5, 4] ; Carlos, Luis D. [3]
Total Authors: 5
Affiliation:
[1] Natl Sci & Tech Res Council CONICET, Buenos Aires, DF - Argentina
[2] Natl Atom Energy Commiss CNEA, Inst Nanosci & Nanotechnol INN, Bariloche Atom Ctr, Av Bustillo, RA-9500 San Carlos De Bariloche, Rio Negro - Argentina
[3] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Phys, Phantom G, P-3810193 Aveiro - Portugal
[4] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys IFGW, Campinas - Brazil
[5] Univ Fed ABC UFABC, CCNH, Santo Andre, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: PHYSICA B-CONDENSED MATTER; v. 629, MAR 15 2022.
Web of Science Citations: 0
Abstract

We combined the sensing capabilities of Er3+-doped upconverting nanoparticles (UCNPs) with hyperspectral microscopy to construct thermal images on thermally active nanostructures. Here, we studied the heat dissipation of a percolating network of silver nanowires under controlled electric current flow. We quantified the electrothermal action by analyzing the hyperspectral data and constructing 2D maps for the emission intensity, the signal-to-noise ratio, and the thermometric parameter. By studying selected clusters in the network, we concluded that the temperature is quite uniform across the film without any significant thermal gradients. Nonetheless, the thermal evolution was clearly sensed by the UCNPs when the heat dissipation due to the Joule effect was turned on and off, validating the use of this method for studying slow-dynamic thermal processes. Finally, we discuss the accuracy of the thermal readings and the systematic limitations of the proposed method. (AU)

FAPESP's process: 11/19924-2 - Study and development of advanced novel materials: electronic, magnetic and nanostructured: an interdisciplinary approach
Grantee:Carlos Rettori
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
Grantee:Pascoal Jose Giglio Pagliuso
Support Opportunities: Special Projects
FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
Grantee:Pascoal Jose Giglio Pagliuso
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/21290-2 - Multi-User Equipment in grant 12/04870-7 - dynamic light scattering analyser Horiba SZ-100Z
Grantee:Pascoal Jose Giglio Pagliuso
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 15/23882-4 - PLASMONIC EFICIENCY INTENSIFICATION OF THE UPCONVESION IN NANOCRYSTAIS DOPED WITH RARE EARTHS.
Grantee:Eduardo David Martínez
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/05903-6 - Nuclear magnetic resonance of novel complex and advanced materials in condensed matter physics
Grantee:Ricardo Rodrigues Urbano
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 15/21289-4 - Multi-User Equipment in grant 12/04870-7 - desktop X-ray powder diffractometer
Grantee:Pascoal Jose Giglio Pagliuso
Support Opportunities: Multi-user Equipment Program