20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Imprinted expended gate Field-Effect transistor for pesticide detection

20 May 2015, 15:00
15m
Phokeethra 1 ()

Phokeethra 1

Oral presentation Atomic Physics, Quantum Physics, Molecular and Chemical Physics Special Session: Pesticide Biosensor (Sponsored by MTEC)

Speakers

Ms Piyawan Leepheng (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand)Ms Sirikan Thongboon (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand)

Description

An extended gate field-effect transistor (EGFET) is a device that can be applied to chemical sensing with the benefit of low cost electrodes. A poly(methylmethacrylate) (PMMA)-imprinted film has been applied to fabricate on indium tin oxide glass as a gate electrode for an EGFET sensor for a specific detection of carbaryl sample. The imprinted film was obtained by mixing PMMA and carbaryl in dichloromethane and drop-cast on the EGFET electrode. Prior to measurements of carbaryl samples, the film was thoroughly rinsed with a low content of ethanol aqueous solution to remove carbaryl from the film. The carbaryl detection by the imprinted EGFET sensor was compared with that of the non-imprinted EGFET. The sensitivity, concentration range and specificity of the sensors were investigated. The imprinted EGFET has a high potential for low cost fabrication of easy-to-use pesticide sensors.

Primary authors

Ms Piyawan Leepheng (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand) Ms Sirikan Thongboon (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand)

Co-authors

Dr Chanchana Thanachayanont (National Metal and Materials Technology Center, National Science and Technology Development Agency, Pathumthani, Thailand) Dr Nongluck Houngkamhang (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand) Dr Pornpimol Sritongkham (Biomedical Engineering, Faculty of Engineering, Mahidol University, 999 Phuttamonthon4 Road, Salaya, Nakhon Pathom 73170, Thailand) Dr Sirapat Pratontep (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand) Mr Suppanat Sasipongpana (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand) Mr Yossawat Rayanasukha (College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand)

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