Laser ablation fingerprint in low crystalline carbon nanotubes : A structural and photothermal analysis
García-Merino, J. A. (Universidad Tecnológica Metropolitana (Xile))
Villarroel, Roberto (Universidad Tecnológica Metropolitana (Xile))
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Hevia, Samuel A. (Pontificia Universidad Católica de Chile)

Date:	2024
Abstract:	Carbon nanotubes (CNT) hold promise as photothermal materials due to their cost-effectiveness, stability, and broad optical absorbance. Here, we investigate the structural and morphological modifications in low-crystalline vertically aligned CNT synthetized via chemical vapor deposition on n-type Si substrates at 750 °C, followed by annealing treatment with near-infrared laser radiation. Raman spectroscopy revealed laser-induced amorphous regions, facilitating identification of ablation thresholds. Time-dependent nonlinear photothermal emission, associated with CNT ablation, showed a stable thermodynamic equilibrium with broad-band radiation from an electron-hole plasma. We propose a model based on Raman spectra and positional scans of the ablation fingerprint, enabling correlation with the beam temperature profile. This study offers insights into laser beam characterization, with potential applications in plasma and optics disciplines.
Grants:	Agencia Estatal de Investigación SEV-2017-0706
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Published in:	Optics & laser technology, Vol. 178 (November 2024) , art. 111255, ISSN 1879-2545

DOI: 10.1016/j.optlastec.2024.111255

Preprint 29 p, 1.8 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles