Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 4 (2017) 6397–6403 www.materialstoday.com/proceedings 2214-7853 © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of International Conference on Science and Technology of the Emerging Materials. STEMa2016 Hybrid graphene and poly(methyl methacrylate) for gas sensor application Chanoknan Rattanabut a , Worawut Muangrat b , Mayuree Phonyiem a , Win Bungjongpru c , Winadda Wongwiriyapan a,d,e, * a College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand , Young Jae Song f b Navamindradhiraj University, Khao Rd., Bangkok 10300, Thailand c Thai Microelectronics Center, National Electronics and Computer Technology Center, Suwinthawong Rd., Chachoengsao 24000, Thailand d Nanotec-KMITL Center of Excellence on Nanoelectronic Devices, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand e Thailand Center of Excellence in Physics, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Thailand f SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 440-746, Korea Abstract The graphene and hybrid graphene/poly(methy methacrylate) (PMMA) were fabricated for use in volatile organic compound (VOC) detection. Graphene was synthesized on copper foil by chemical vapor deposition (CVD). To remove Cu foil, PMMA was coated on graphene by spin-coating (hereafter referred to as graphene/PMMA) and transferred to silicon substrate with silicon dioxide layer (SiO 2 /Si) by wetting transfer process. For comparison, a PMMA layer was removed in order to achieve a pristine graphene. Graphene and hybrid graphene/PMMA sensors showed the highest sensor response to ethanol. Responses of the graphene to ethanol, dichloromethane and benzene were 5.62, 20.06 and 35.09 times higher than that of hybrid graphene/PMMA. The sensor response of graphene can be described in terms of the dielectric constant of VOC. In addition, the sensor response of hybrid graphene/PMMA to benzene and dichloromethane would be attributed to the Hansen solubility parameter (HSP), while that of ethanol is related to the molecular size. These results suggest that the integration of graphene with PMMA is a promising approach for the selectivity for VOC detection. © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of International Conference on Science and Technology of the Emerging Materials. * Corresponding author. Tel.: +66-2-329-8000 ext 3133; fax: +66-2-329-8265. E-mail address: winadda.wo@kmitl.ac.th