Fabrication and characterisation of fluidic based memristor sensor for liquid with hydroxyl group

Hadis, Nor Shahanim Mohamad and Manaf, Asrulnizam Abd and Ngalim, Siti Hawa and Herman, Sukreen Hana (2017) Fabrication and characterisation of fluidic based memristor sensor for liquid with hydroxyl group. Sensing and Bio-Sensing Research, 14. pp. 21-29. ISSN 2214-1804

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Two types of memristor sensor were fabricated using two different TiO2 deposition methods of sputtering and sol-gel spin coating. The surface morphology of the sensors and the behaviour of the sensors were analysed by using scanning electron microscopy with energy dispersive x-ray system and I-V characterisation system respectively. The sensors were applied with liquid with hydroxyl group to check the capability of this sensor in sensing different concentration of hydroxyl ion inside the liquid. For that purpose, D-glucose liquid with four concentrations of 10 mM, 20 mM, 30 mM and 40 mM were chosen. The liquids dispensed onto the TiO2 surface to act as sensing material. The TiO2 surface was initially covered with polydimethylsiloxane to control the liquid. The sensing capability of the sensors was determined via the current-voltage measurement and off-on resistance ratio. The sensitivity of the sensors was analysed from the off-on resistance ratio analysis. Type II memristor sensor which was fabricated using sol-gel spin coating technique recorded high sensitivity of 120.65 (mM)−1, while Type I sensor fabricated using the sputtering technique recorded low sensitivity of 0.035 (mM)−1. However, SEM-EDX image illustrated that the sputtering technique produced more uniform TiO2 thin film than sol-gel spin coating technique with larger atomic number of oxygen through the sol-gel spin coating technique. This indicates Type II sensor that has large number of oxygen atom produced more reaction with hydroxyl ion inside the liquid. While, Type I sensor produced less reaction compared with Type II and thus produced smaller off-on resistance ratio.

Item Type: Article
Subjects: R Medicine > RK Dentistry > RK1-715 Dentistry
T Technology > TK Electrical Engineering. Electronics. Nuclear Engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering
Divisions: Institut Perubatan & Pergigian Termaju (Advanced Medical & Dental Institute) > Article
Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraaan Elektrik & Elektronik (School of Electrical & Electronic Engineering) > Article
Zoom Profil Pakar (Expert Profile) > Associate Professor Dr. Asrulnizam Abd Manaf (Collaborative Microelectronic Design Excellence Centre)
Depositing User: Mr Noorazilan Noordin
Date Deposited: 05 Oct 2017 15:47
Last Modified: 12 Feb 2018 16:08
URI: http://eprints.usm.my/id/eprint/36958

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