LED-induced photoactivity of self-supporting chitosan-azobenzene films for light energy harvesting/storage

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-02-03 DOI:10.1007/s10570-025-06405-1

Constanza Kremer-Seitz, Pablo Castillo, Alain Tundidor-Camba, Oscar Ramírez, Sebastian Bonardd, David Díaz Díaz, Angel Leiva, Cesar Saldias

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引用次数: 0

Abstract

In this report, we conducted the synthesis, fabrication, and characterization of chitosan-azobenzene films using the solvent evaporation method. The samples were characterized through thermogravimetric analysis, differential scanning calorimetry, contact angle measurements, atomic force microscopy, and ultraviolet‒visible spectroscopy. The main goal of this study was to investigate the photoactivity of chitosan-azobenzene films utilizing LED light as a radiation source. Remarkably, employing both ultraviolet and visible light allowed us to witness the photoisomerization phenomenon of azobenzene, i.e., the direct process (trans → cis), in the films. Moreover, we investigated the reverse process (cis → trans) in the absence of light. Interestingly, this step can be executed in darkness, indicating zero energy demand for this phase of the process. The results indicated that these self-supporting materials are capable of harvesting and storing light energy.

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.