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Optimization of printing techniques for electrochemical biosensors

Zainuddin, Ahmad Anwar and Mohd Mansor, Ahmad Fairuzabadi and Ab Rahim, Rosminazuin and Nordin, Anis Nurashikin (2017) Optimization of printing techniques for electrochemical biosensors. In: 11th Asian Conference on Chemical Sensors (ACCS2015), 16th-18th November 2015, Penang, Malaysia.

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Electrochemical biosensors show great promise for point-of-care applications due to their low cost, portability and compatibility with microfluidics. The miniature size of these sensors provides advantages in terms of sensitivity, specificity and allows them to be mass produced in arrays. The most reliable fabrication technique for these sensors is lithography followed by metal deposition using sputtering or chemical vapor deposition techniques. This technique which is usually done in the cleanroom requires expensive masking followed by deposition. Recently, cheaper printing techniques such as screen-printing and ink-jet printing have become popular due to its low cost, ease of fabrication and mask-less method. In this paper, two different printing techniques namely inkjet and screen printing are demonstrated for an electrochemical biosensor. For ink-jet printing technique, optimization of key printing parameters, such as pulse voltages, drop spacing and waveform setting, in-house temperature and cure annealing for obtaining the high quality droplets, are discussed. These factors are compared with screen-printing parameters such as mesh size, emulsion thickness, minimum spacing of lines and curing times. The reliability and reproducibility of the sensors are evaluated using scotch tape test, resistivity and profile-meter measurements. It was found that inkjet printing is superior because it is mask-less, has minimum resolution of 100 μm compared to 200 μm for screen printing and higher reproducibility rate of 90% compared to 78% for screen printing.

Item Type: Conference or Workshop Item (Plenary Papers)
Additional Information: 4269/57787
Uncontrolled Keywords: printing techniques, electrochemical biosensors
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Dr. Anis Nurashikin Nordin
Date Deposited: 31 Jul 2017 09:15
Last Modified: 18 Aug 2019 14:57
URI: http://irep.iium.edu.my/id/eprint/57787

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