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Preliminary study on graphene/metal oxide nanoparticles-coated cotton fabrics for flexible gas sensor
Wicaksono D.H.B.a, Utari L.b, Wulan N.b, Engel D.J.a, Widjaja S.T.a, Jovinka X.a, Genilar L.A.a, Setiawan S.A.a, Yuliarto B.b, Dipojono H.K.b, Jenie S.N.A.c, Tursiloadi S.c, Krismastuti F.S.H.c, Herbani Y.c
a Department of Biomedical Engineering, Faculty of Life Sciences and Technology, Swiss German University, Prominence Tower, Alam Sutera, Tangerang, Banten, 15143, Indonesia
b Department of Engineering Physics, Institut Teknologi Bandung, Bandung, 40132, Indonesia
c Research Center for Chemistry, Indonesian Institute of Sciences, Jalan Kawasan Puspiptek, Serpong, Tangerang Selatan, Banten, 15314, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 Author(s).Gas sensors made from metal-oxide ceramics have been commonly known and have even been widely available in the market, e.g. the Taguchi gas sensor. Most of these sensors, however, are still fabricated on a rigid substrate, e.g. Alumina substrate. Their use is then limited by the need to bring the whole sensor and instrumentation to the field where gas is produced. There is a need to have a wearable gas sensing implementation where the gas sensor can be embedded into cloth and be used anywhere the person is wearing the cloth during his duties. In this work, we present for the first time our preliminary work on coating flexible substrate, i.e. cotton fabrics, with metal oxide nanoparticles, with intended gas sensing function. We first tried two different metal oxide nanoparticles. In the first case, titanium dioxide (TiO2) nanoparticles were coated onto the cotton fabrics. And in the second case, we tried to combine Titanium and Silicon Oxides. Both cases of metal oxide nanoparticles were synthesized using sol-gel method. The synthesized nanoparticles were characterized using X-Ray Diffraction (XRD) Spectroscopy and Transmission Electron Microscopy (TEM). The nanoparticles were coated onto scoured cotton cloth. After coating testing electrodes were made by brushing Ag/AgCl paste. The metal oxide coated cotton were tested for its gas sensing property in a gas testing chamber under room temperature. The TiSiO coated cotton shows an increasing resistance response upon the introduction of CO gas. However, this result cannot be reproduced in later tests. Both metal oxide-coated cotton samples showed too high nominal resistances at room temperature, that they overload the multimeter readings. To reduce the nominal resistance, graphene layer was coated on top of the metal oxide layer on the cotton fabrics. The graphene layers reduced the nominal resistance of the metal oxide-coated cotton fabrics. The sensitivity towards gases, yet, did not significantly improve. Spikes of resistances were indicated upon the introduction of oxidising gases like NO2, Toluene, Acetone, Ethanol and Methanol. This low sensitivity may be caused by overcoating of graphene that reduce the interaction between the gas and the underlying metal oxide nanoparticle layers.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This research was supported by the research grant from: Ministry of Research, Technology, and Higher Educations; World Class Professor research grant, and also ITB research grant program. D.H.B. Wicaksono would also like to acknowledge the support from SGU research grants: Faculty Research Fund (FRF) and Central Research Fund (CRF).[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/1.5064349[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]