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Interdigitated Electrode are known as one of the hallmark of biosensors because of its numerous applications. Biosensors projects to be preferable devices especially in hospitals and other medical faculties as well as in other interdisciplinary fields because of its small size and high sensitivity. Since size plays a salient role in sensitivity and selectivity, in this research, 140 nm IDEs and 50μm...
In this paper, we present the fabrication and electrical characterization of field-effect transistor-based sensor with integrated graphene oxide (GO) on channel between source and drain. We aim to demonstrate the optimum condition in electrical performance for field-effect transistor-based biosensor device. Graphene oxide prepared by using modified hummers method was deposited on the channel with...
Biosensors become a main attraction nowadays due to its importance towards human health. Its allow rapid and label-free detection that provides low cost clinical sampling. A FET device was fabricated from silicon-on-insulator (SOI) type of wafer with titanium dioxide (TiO2) thin film as a sensing medium. TiO2 was deposited by using sol-gel solution, spin coated on the device, patterned and anneal...
Surface Acoustic Wave (SAW) device uses piezoelectric effect to generate acoustic wave on the piezoelectric substrate by using Interdigital Transducers (IDT). Early application was in telecommunication field as filter and resonators. However, due its sensitivity to mass, viscosity and velocity changes on the path between two IDTs, it is used as biosensors. In this project, the focus will be on fabrication...
Growth of titanium dioxide (TiO2) nanowires was studied on the seed layer of TiO2 through hydrothermal growth method. Here, the growth of nanowires TiO2 on Si (100) substrates by using the two steps method. Different seed layers of TiO2 were prepared by using sol-gel method, deposited by spin coating and annealing, followed by the growth of TiO2 nanowires by using the hydrothermal method. Acetic acid...
This paper presents the preparation and characterization of zinc oxide (ZnO) thin film prior deposition on the channel of field-effect transistor with back gate biasing (FET-BG) for biosensing application. Sol-Gel technique is a chosen method for the preparation of the ZnO seed solution, followed by the deposition process through spin coating technique on the silicon dioxide (SiO2). Prior to that,...
A solution gate field effect transistor (SGFET) has been fabricated for the detection of HIV-1 Tat protein. Functionalized carboxylated multiwalled carbon nanotube (COOH-MWCNT) has been deposited on the FET to act as amplification layer and immobilization site for aptamer. Aptamer has been a very reliable probe for detection of protein with high specificity. In this paper, we demonstrated the immobilized...
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