Vol 21, No 3 (2017) > Mini Conference >

Study on Semiconductor Properties of Acetylide-Thiourea Fabricated onto Interdigitated Electrodes (Ides) Platform Towards Application In Gas Sensing Technology

Adibah Izzati Daud 1 , Wan Mohd Khairul Wan Mohamed Zin 2 , Mohd Ikmar Nizam Mohamad Isa 2 , Khairul Anuar Abdul Wahid 3


  1. Faculty of Engineering Technology, University Malaysia Perlis (UniMAP), Sungai Chuchuh, Padang Besar, 02100 Perlis, Malaysia
  2. School of Fundamental Science, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
  3. International College UniKL (ICOLE), Malaysia France Institute (MFI), Universiti Kuala Lumpur, 43650 Bandar Baru Bangi, Selangor, Malaysia


Abstract: In the past few decades, the unique properties of acetylide and thiourea moieties individually have attracted great attention from researchers in various fields to be developed in numerous applications in advanced materials technology, especially as active layer in gas sensing devices. Acetylide and thiourea molecular system provides a wide range of electronic properties as they possess rigid π-systems in their designated structures. In this study, a derivative of acetylide-thiourea featuring N-(4[4-aminophenyl] ethynyl benzonitrile)-N’-(4-ethyl benzoyl)thiourea (TCN) has been synthesised having general formula of ArC(O)NHC(S)NHC≡C)Ar adopting the system of D-π-A for significant development of conductive materials. The derivative consists of donating substituent which has been characterised by typical spectroscopic techniques namely infrared spectroscopy, UV-visible spectroscopy, and 1H and 13C Nuclear Magnetic Resonance. In turn, TCN was deposited onto interdigitated electrode (IDE) for the measurement of thin-film resistance. The resistance values of synthesised compound is due to the effect of donating substituent attached to the acetylide-thiourea, which indeed altered the conductivity performances of fabricated IDE substrate. In fact, the theoretical calculation also was carried out using Gaussian 09 to evaluate the relationship between experimental and theoretical analyses of acetylide-thiourea semiconductor properties in term of energy band gap and sensing response towards selected analyte.
Keywords: acetylide, conductivity, IDE, semiconductor, thiourea
Published at: Vol 21, No 3 (2017) pages: 103-108

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