Uda Hashim, Prof. Ts. Dr.: Recent submissions
Now showing items 161-180 of 243
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Development of highly selective electronic nose using molecular imprinted polymer (MIP) for recognition of fruit ripeness
(Universiti Malaysia Perlis (UniMAP), 2012-02-27)Traditionally, fruits are harvested through conventional methods which are based on smell, texture and harvesting time. This analytical technique has many disadvantages in terms of objectivity and subjectivity. Electronic ... -
Development of carbon nanotube based biosensor fabrication for medical diagnostics application
(Institute of Electrical and Electronics Engineers (IEEE), 2010-12-01)Carbon nanotubes are tiny hollow cylinders, made from a single grapheme sheet, that possess many amazing properties. Spurred by the Human Genome Project, deoxyribonucleic acid (DNA), carbon nanotube based biosensors are ... -
Morphological, optical, and Raman characteristics of ZnO nanoflakes prepared via a sol-gel method
(WILEY-VCH Verlag GmbH & Co., 2012-01)Two-dimensional (2D) ZnO nanoflakes were grown on thin aluminum layer, deposited on silicon substrate, using a sol-gel method. The surface morphologies of ZnO nanoflakes at different precursor concentrations were studied ... -
Nanowire conductance biosensor by spacer patterning lithography technique for DNA hybridization detection: Design and fabrication method
(Institute of Electrical and Electronics Engineers (IEEE), 2008-11-04)The use of Silicon nanowires has allowed the introduction of many new signal transduction technologies in biosensors. The sensitivity and performance of biosensors is being improved by using doping process for their ... -
Design and fabrication of nano biologically sensitive field-effect transistor (nano bio-FET) for bio-molecule detection
(American Institute of Physics, 2011)Biologically Sensitive Field-Effect Transistor (Bio-FET) based on silicon nanowires (SiNWs), so called Nano Bio-FET, promise ultrasensitive dynamic label-free electrical detection of bio-molecule. Therefore, Nano Bio-FET ... -
Fabrication and characterization of a-Si micro and nano-gap structure for electrochemical sensor
(American Institute of Physics, 2010-12-01)The development and application of micro gap for electrochemical sensors and biomolecule detection are reviewed in this article. The preparation methods for micro- and nano-gaps and their properties are discussed along ... -
Sensitivity of A-549 human lung cancer cells to nanoporous zinc oxide conjugated with Photofrin
(Springer-Verlag London Ltd., 2012-05)In the present study, we demonstrated the use of nanoporous zinc oxide (ZnO NPs) in photodynamic therapy. The ZnO NPs structure possesses a high surface to volume ratio due to its porosity and ZnO NPs can be used as an ... -
Low cost diffuser based micropump using pinch actuation
(Scientific.net, 2011-12)Planar pinch micropump with the integration of two diffuser valve elements has been reported. The fabrication of the micropump is carried out by utilizing simple hot embossing technique for microdiffuser imprinting and ... -
Functionalised zinc oxide nanotube arrays as electrochemical sensors for the selective determination of glucose
(The Institution of Engineering and Technology, 2011-08)In the present study, highly oriented single-crystal zinc oxide nanotube (ZnO-NT) arrays were prepared by a trimming of ZnO nanorods along the c-axis on the gold-coated glass substrate having a diameter of 100-200nm and a ... -
Swine-Specific PCR-RFLP Assay Targeting Mitochondrial Cytochrome B Gene for Semiquantitative Detection of Pork in Commercial Meat Products
(Springerlink, 2011)Verification of pork adulteration in commercial meat products is increasingly important for the authentication of Halal labels in processed foods. Here, we documented a PCR-restriction fragment length polymorphism (RFLP) ... -
Nanobiosensor for the detection and quantification of specific DNA sequences in degraded biological samples
(Springer-Verlag, 2011-06-20)A 27-nucleotide AluI fragment of swine cytochrome b (cytb) gene was integrated to a 3-nm diameter citrate- tannate coated gold nanoparticle to fabricate a species specific nanobiosensor. The biosensor was applied to ... -
Nanoparticle sensor for label free detection of swine DNA in mixed biological samples
(IOP Publishing Ltd., 2011-05-13)We used 40 5nm gold nanoparticles (GNPs) as colorimetric sensor to visually detect swine-specific conserved sequence and nucleotide mismatch in PCR-amplified and non-amplified mitochondrial DNA mixtures to authenticate ... -
Fabrication and characterization of gold nano-gaps for ssDNA immobilization and hybridization detection
(Journal of New Materials for Electrochemical Systems, 2011)We develop a method for fabricating the nano-gaps directly by using just photolithography and wet etching processes without any nano lithography or difficult techniques. It shows that this resolution enhancement allows one ... -
Fabrication and characterization of 50 nm silicon nano-gap structures
(American Scientific Publishers, 2011-04)A simple method for the fabrication of nano-gaps less than 50 nm by using conventional photolithography combined with patterned-size reduction techniques is presented. Silicon material is used to fabricate the nano-gap ... -
Nanoparticle sensor for label free detection of swine DNA in mixed biological samples
(IOP Publishing Ltd, 2011-05-13)We used 40 ± 5 nm gold nanoparticles (GNPs) as colorimetric sensor to visually detect swine-specific conserved sequence and nucleotide mismatch in PCR-amplified and non-amplified mitochondrial DNA mixtures to authenticate ... -
ISFET for pH Sensor
(Universiti Sains Islam Malaysia (USIM), 2010-09-26)ISFET is an ionic Sensitive Field Effect Transistor that has similar structure to that of a conventional MOSFET. -
An ab initio study of the electronic structure and optical properties of CdS1-xTex alloys
(Elsevier Ltd., 2010-12)The structural, electronic and optical properties of cubic CdS1-xTex alloys, with Te-concentrations varying from 0% up to 100% are investigated. The calculations are based on the total-energy calculations using the full ... -
A review on the electrochemical sensors and biosensors composed of nanogaps as sensing material
(National Institute of Research and Development for Optoelectronics, 2010)In the past two decades, the biological and medical fields have seen great advances in the development of biosensors and biochips capable of characterizing and quantifying biomolecules.To understand the important relationship ... -
A study for optimum productivity yield in 0.16μm mixed of wafer fabrication facility
(Institute of Electrical and Electronics Engineers (IEEE), 2010-06-28)This research is to study the opportunity to achieve optimum productivity yield in 0.16μm product mixed through understanding the impact of loading utilization towards the capacity. The study is important to model the ... -
Si-quantum Dots (QD) and SiO2 tunnel barriers
(Universiti Malaysia Perlis (UniMAP)Pejabat Timbalan Naib Canselor (Penyelidikan dan Inovasi), 2008-07)Oxidation of Si for nanostructures on silicon-on-insulator (SOI) substrates is a key process in the fabrication of Si single electron transistor (SET). The most di cult aspect of the fabrication process is the formation ...