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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...
Interdigitated electrode based electrical biosensors are prominent in biosensor field. The large number of finger electrodes as comb structure gain high sensitivity through electrical measurements. Listeria monocytogenes is a serious food borne pathogen based bacterium that can cause dangerous disease to human, some infection may result in death. In here, biosensor was prepared from 1μm gap Aluminum...
Efficient micromixing is required for fast reaction and improved mixing performance for DNA extraction in microfluidic devices. This study outlines a simple, low cost approach for prototyping design and fabrication of PDMS microfluidics micromixers for DNA extraction. The design is plotted using AutoCAD software and the master template is fabricated using a negative photoresist, SU-8, on a microscopic...
Recently, the outcome of SiNWs had been greatly anticipated because of the remarkable properties including for biomolecules detection. SiNWs had been developed with size reduction lithography to form silicon wires as the final device sensor. The results of the sensor are analyzed to determine surface morphological and electrical behavior of the silicon wires. The relationship between value of the...
Soft lithography describes the moulding of polymers using master templates, a technology that is widely used in microfluidics fabrication. This study outlines a quick and low cost soft lithography processing using negative photoresist (PR) SU-8 on glass substrate to create a master template for subsequent Polydimethylsiloxane (PDMS) replication in overall microfluidics fabrication. Two types of negative...
Among many methods to synthesize Zinc Oxide (ZnO) thin films, the most commonly used method is sol gel technique. In this study, we have used sol gel approach deposited on silicon substrate. To investigate the structural and electrical properties of ZnO thin films, silicon substrates were coated at 1, 3, 5 and 7 layers of ZnO thin film. For characterization purposes, SEM and Current-Voltage measurements...
Interdigitated Electrode (IDE) is a sensor device that composed of the fingers of the electrode and two pads made up of high conductivity of the metal. IDE is prepared by simple photolithographic process that included transferred of the desired design pattern to the Silicon Oxide (SiO) substrate. 130nm nanogap of IDE is used for this experiment. This paper is conducted to compare the bare IDE without...
interdigitated electrodes (IDEs) with GO-MWCNTs thin film as sensing membrane have been successfully developed on silicon substrate for DNA detection. The physical surface morphology of GO-MWCNTs were characterized using field emission scanning electron microscopy (FESEM) and the surface structural was determined by X-ray powder diffraction (XRD). The chemical bonding of GO-MWCNTs were examined by...
Graphene is one of the carbon allotropes that possesses several outstanding properties which is suitable to be used in bio-sensing applications. Reduction of graphene oxide (GO) is the main concern of researchers in preparing better quality of graphene at a lower cost with mass production as the reduced GO partially restores the pristine graphene. The reduced graphene oxide (rGO) is then mixed with...
As a present work, a capacitive electrochemical biosensor i.e. Interdigitated Elecrode (IDE) was successfully designed and fabricated with aluminium as its contact pad deposited on a semi-conductor (silicon) surface using a thermal evaporator. For the fabrication method, lift-off photolithography process is applied followed by morphological and electrical characterizations. Meanwhile, the design of...
ZnO is synthesized by using conventional chemical route which is known as the “sol – gel” method and deposited on glass and silicon substrate. Morphological and optical properties have been investigated using XRD, AFM, FESEM and UV – vis test. In order to optimize the synthesized ZnO thin film, the ZnO thin film is coated with thin film of different thickness associated with various annealing temperature...
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...
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