Sains Malaysiana 42(2)(2013): 213–217

Polyvinylpyrrolidone/Polyaniline Composite Based 36° YX LiTaO₃ Surface Acoustic Wave H₂

Gas Sensor

(Pengesan Gas Hidrogen: Komposit Polivinilpirolidon/polianilin

di atas 36° YX LiTaO₃ Gelombang Akustik Permukaan)

Amir Sidek & Rashidah Arsat*

Faculty of Electrical Engineering, Universiti Teknologi Malaysia,

81310 Skudai, Johor Bahru, Malaysia

Xiuli He

State Key Laboratory of Transducer Technology, Chinese Academy of Sciences

52 Sanlihe Rd., Beijing, 100864, China

Kourosh Kalantar-zadeh & Wojtek Wlodarski

School of Electrical & Computer Engineering, RMIT University

124 La Trobe Street, Melbourne, Victoria 3000 Australia

Received: 7 January 2012 / Accepted: 21 May 2012

ABSTRACT

Poly-vinyl-pyrrolidone (PVP)/polyaniline based surface acoustic wave (SAW) sensors were fabricated and characterized and their performances towards hydrogen gas were investigated. The PVP/polyaniline fibers composite were prepared by electrospinning of the composite aqueous solution deposited directly onto the active area of SAW transducers. Via scanning electron microscopy (SEM), the morphology of the deposited nanostructure material was observed. From the dynamic response, frequency shifts of 6.243 kHz (1% H2) and 8.051 kHz (1% H2) were recorded for the sensors deposited with PVP/ES and PVP/EB, respectively.

Keywords: Gas sensor; polyvinylpyrrolidone/polyaniline composite; surface acoustic wave

ABSTRAK

Lapisan pengesan polivinilpirolidon (PVP)/polianilin yang dimendap secara terus di atas kawasan aktif pengesang gelombang akustik permukaan (SAW) telah berjaya dihasilkan. Permukaan bahan komposit yang dihasilkan melalui kaedah elektroputaran ini dicirikan menggunakan mikroskop elektron imbasan (SEM). Prestasi pengesan bahan komposit/SAW terhadap gas hidrogen telah dianalisis. Anjakan frequensi sebanyak 6.243 kHz (1% H2) dan 8.051 kHz (1% H2) bagi pengesan yang dimendapkan dengan PVP/ES dan PVP/EB telah direkodkan.

Kata kunci: Kompositpolivinilpirolidon /polianilin; pengesan gas; gelombang akustik permukaan (SAW)

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*Corresponding author; email: rashidah@fke.utm.my