Environmentally friendly Au@CNC hybrid systems as prospective humidity sensors.

Autor:	Koroleva MS; Institute of Chemistry of Federal Research Centre 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences' 48 Pervomayskaya Street 167000 Syktyvkar Russia gmartakov@gmail.com kef@scamt-itmo.ru., Tracey C; ITMO University Lomonosova Str., 9 Saint Petersburg 191002 Russian Federation., Sidunets YA; ITMO University Lomonosova Str., 9 Saint Petersburg 191002 Russian Federation., Torlopov MA; Institute of Chemistry of Federal Research Centre 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences' 48 Pervomayskaya Street 167000 Syktyvkar Russia gmartakov@gmail.com kef@scamt-itmo.ru., Mikhaylov VI; Institute of Chemistry of Federal Research Centre 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences' 48 Pervomayskaya Street 167000 Syktyvkar Russia gmartakov@gmail.com kef@scamt-itmo.ru., Krivoshapkin PV; ITMO University Lomonosova Str., 9 Saint Petersburg 191002 Russian Federation., Martakov IS; Institute of Chemistry of Federal Research Centre 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences' 48 Pervomayskaya Street 167000 Syktyvkar Russia gmartakov@gmail.com kef@scamt-itmo.ru., Krivoshapkina EF; Institute of Chemistry of Federal Research Centre 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences' 48 Pervomayskaya Street 167000 Syktyvkar Russia gmartakov@gmail.com kef@scamt-itmo.ru.; ITMO University Lomonosova Str., 9 Saint Petersburg 191002 Russian Federation.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2020 Sep 21; Vol. 10 (58), pp. 35031-35038. Date of Electronic Publication: 2020 Sep 21 (Print Publication: 2020).
DOI:	10.1039/d0ra07300h
Abstrakt:	Both cellulose nanocrystals and gold nanoparticles show immense potential for biological and chemical applications. Gold nanoparticles, which tend to aggregate, are hybridized with cellulose nanocrystals to form stable inorganic-organic hybrids in which nanocellulose acts as a green supporting material for the catalytically active gold nanoparticles. A green synthesis approach was taken, and hydrothermal treatment was used to reduce electrostatic repulsion between the gold nanoparticles and the cellulose nanocrystals to promote heteroaggregation instead of homoaggregation. AFM analysis showed hybrid films to be hygroscopic, suggesting that they would respond to changes in humidity. Laser diffraction and fluorescence quenching were used to determine how hybrid films respond to changes in humidity. Hybrid films were found to respond to changes in humidity quickly, reversibly, and autonomously, making them ideal for use as or in a humidity sensor. Gold nanoparticles were shown to enhance the hybrid response to ambient moisture, causing them to show a linear dependence on changes in humidity, making the hybrid controllable, highly sensitive, and a viable prospective material for humidity sensing applications. Competing Interests: The authors confirm that there are no conflicts of interest as no financial support for this work has influenced our findings. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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