| 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 |