Graphene woven fabric-polydimethylsiloxane piezoresistive films for smart multi-stimuli responses

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Tung, Tran T. ; Tran, Manh T. ; Pereira, Ana L. C. ; Cordeiro, Cristiano M. B. ; Nguyen, Duc D. ; Tai, Nyan-Hwa ; Tran, Van V. ; Hsu, Chia-Chen ; Joshi, Prerna ; Yoshimura, Masamichi ; Feller, Jean F. ; Castro, Mickael ; Hassan, Kamul ; Nine, Md J. ; Stanley, Nathan ; Losic, Dusan

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES B-BIOINTERFACES; v. 221, p. 11-pg., 2022-11-01.

Resumo

The outstanding properties of graphene, including its electromechanical property, could be engineered for wearable electronic sensor platforms. The tubular graphene weaved into a mesh or graphene woven fabrics (GWF) has been reported as one of the most sensitive materials for deformation detection, as well as a promising temperature sensor. Herein, we present the performance of our developed flexible, stretchable, and multiple sensitive sensors fabricated from GWF embedded in polydimethylsiloxane (PDMS) film substrate. The GWF/ PDMS sensor shows a pressure sensitivity of 0.0142 kPa-1 in a wide linearity range of 0-20 kPa, an outstanding Gauge factor (GF) of 582 at a strain of 6.2 %, and a very high positive sensitivity of 0.0238 degrees C- 1 in the temperature range of 25-80 degrees C. A practical application as a high sensitivity air pressure sensor able to measure low pressures (in the range of Pa to kPa) was also demonstrated. This sensor platform having desirable performance characteristics is an excellent candidate for wearable devices in the healthcare sector. (AU)

• Processo FAPESP: 18/10409-7 - Sensores Ópticos Avançados baseados em Fibras Ópticas
• Beneficiário: Cristiano Monteiro de Barros Cordeiro
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 18/15842-0 - Grafeno e Materiais à base de Grafeno para Aplicações em Sensores Avançados
• Beneficiário: Ana Luiza Cardoso Pereira
• Modalidade de apoio: Bolsas no Exterior - Pesquisa