Photochemistry dominates over photothermal effects in the laser-induced reduction of graphene oxide by visible light

Photochemistry dominates over photothermal effects in the laser-induced reduction of graphene oxide by visible light

Détails bibliographiques
Parent link:Nature Communications.— .— New York: Springer Nature
Vol. 15, iss. 1.— 2024.— Article number 9711, 13 p.
Autres auteurs: Fatkullin M. I. Maksim Ilgizovich, Cheshev D. L. Dmitry Leonidovich, Averkiev A. A. Andrey Alekseevich, Gorbunova A. Alina, Murastov G. Gennadiy, Liu Jianxi, Postnikov P. S. Pavel Sergeevich, Cheng Chong, Rodriguez (Rodriges) Contreras R. D. Raul David, Sheremet E. S. Evgeniya Sergeevna
Résumé:Title screen
Graphene oxide (GO) possesses specific properties that are revolutionizing materials science, with applications extending from flexible electronics to advanced nanotechnology. A key method for harnessing GO’s potential is its laser-induced reduction, yet the exact mechanisms — photothermal versus photochemical effects — remain unclear. Herein, we discover the dominant role of photochemical reactions in the laser reduction of GO under visible light, challenging the prevailing assumption that photothermal effects are dominant. Employing a combination of Raman thermometry, X-ray photoelectron and photoluminescence spectroscopies, and electrical atomic force microscopy, we quantify the temperature and map the reduction process across micro and nano scales. Our findings demonstrate that the photochemical cleavage of oxygen-containing groups below a reduction threshold temperature is a decisive factor in GO reduction, leading to distinct characteristics that cannot be replicated by heating alone. This work clarifies the fundamental mechanisms of GO transformation under visible laser irradiation, highlighting the dominant role of photochemical processes. Distinguishing these subtleties enables the development of laser-reduced GO platforms for graphene-based applications compatible with industrial scales. We illustrate this potential by encoding information on GO surfaces as optical storage, allowing us to write binary sequences in long-term memory encoding invisible even through an optical microscope
Текстовый файл
AM_Agreement
Langue:anglais
Publié: 2024
Sujets:
электронный ресурс
труды учёных ТПУ
Optical properties and devices
Photochemistry
Accès en ligne:https://doi.org/10.1038/s41467-024-53503-y
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=680861

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