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Nanotechnology

Title:		C(60)-encapsulated TiO(2)nanoparticles for selective and ultrahigh sensitive detection of formaldehyde
Author(s):		Gakhar T; Hazra A;
Address:		"Dept. of Electrical & Electronics Engineering, Birla Institute of Technology and Science (BITS)-Pilani, Vidya Vihar, Rajasthan 333031, India"
Journal Title:		Nanotechnology
Year:		2021
Volume:		20210923
Issue:		50
Page Number:		-
DOI:		10.1088/1361-6528/ac23f9
ISSN/ISBN:		1361-6528 (Electronic) 0957-4484 (Linking)
Abstract:		"The current study concerns development of fullerene-C(60)-encapsulated TiO(2)nanoparticles hybrid for an efficient detection of volatile organic compounds (VOCs). The nanocomposite was synthesized via chemical route by using hydrated fullerene-C(60)and sol-gel derived undopedp-type TiO(2)nanoparticles. The nanocomposite was characterized morphologically and structurally comparing with pure C(60)clusters and pure TiO(2)nanoparticles as the reference materials. The average diameter of the C(60)-encapsulated TiO(2)nanoparticles was 150 nm whereas the average diameters of C(60)clusters and pure TiO(2)nanoparticles were 161 nm and 18 nm respectively. Therefore, all the materials were implemented in interdigitated electrode based planner structured sensors and tested towards multiple VOCs. However, C(60)-TiO(2)composite exhibited its natural selectivity towards formaldehyde with a very high sensitivity for the concentration range of 1-1000 ppm. C(60)-encapsulated TiO(2)nanoparticles depicted more than double response magnitude (117%) than the pure TiO(2)nanoparticle (48%) and pure C(60)particles (40%) and appreciably fast response/recovery (12 s/331 s) towards 100 ppm of formaldehyde at 150 degrees C. However, the efficient VOC sensing was achieved in C(60)-encapsulated TiO(2)sensors possibly due to the extreme reactive surface provided by the oxygen functionalized C(60)and easy electronic exchange between ambient and the TiO(2)nanoparticles through C(60)layers. The combined properties of both C(60)and TiO(2)lead to the formation of a promising nanocomposite which provided better sensing characteristics than that of the pure materials"
Keywords:		TiO2 nanoparticles formaldehyde detection fullerene-C60 high sensitivity nanocomposite;
Notes:		"PubMed-not-MEDLINEGakhar, Teena Hazra, Arnab eng England 2021/09/07 Nanotechnology. 2021 Sep 23; 32(50). doi: 10.1088/1361-6528/ac23f9"