Eco-friendly modification of a regenerated cellulose based film by silicon, carbon and N-doped carbon quantum dots. (15th February 2019)

• Record Type: Journal Article
• Authors: Cuevas, A.; Campos, B.B.; Romero, R.; Algarra, M.; Vázquez, Mª.I.; Benavente, J.
• Is Part Of: Carbohydrate polymers. Volume 206(2019)
• Page Start: 238
• Page End: 244
• Publication Date: 2019-02-15
• Subjects: Cellulosic films -- Carbon nanodots -- Spectroscopy ellipsometry -- Transmittance; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2018.10.074
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Cellulosic film modification by non-toxic nanodots (SiDs, CDs and N-CDs). Easy and environmentally friendly film modification by dip-coating process. Nanodots modify film optical, electrical and mechanical characteristics. N-CDs/cellulosic film shows fluorescent, electrical and optical improvement. Abstract: Modification of a regenerated cellulose thin film by inclusion of different non-toxic nanodots (silicon-dots (SiDs), carbon-dots (CDs)) or nitrogen-doped carbon dots (N-CDs)) by aqueous nanodots solution immersion was performed. Nanodots presence into the cellulosic structure was evidenced by confocal microscopy images at different depth and changes in film mechanical, electrical and optical parameters. Our results reveal that the inclusion of the different nanodots in the cellulosic support increases, indifferent percentages, the mechanical resistance and electrical conductivity of modified films, but they hardly affect light transmittance. Particularly, modification with N-CDs largely favored film conductivity due to the presence of the higher number of charged functional groups (CNH2 and OCNH2 ) groups) on N-CDs surface, allowin gus the attainment of a flexible, fluorescent and transparent high conductive eco-friendly film. In fact, the non-toxic character of both support-film and nanodots, endorses the use of these new nano-engineering films in biomedical applications.