Now showing items 1-20 of 109

    • Alternative-current electrochemical etching of uniform porous silicon for photodetector applications 

      Husnen R., Abd; Yarub, Al-Douri, Assoc. Prof. Dr.; Naser Mahmoud, Ahmed, Dr.; Uda, Hashim, Prof. Dr. (Electrochemical Science Group, 2013)
      The twining of alternative-current (AC) with electrochemical etching (ECE) to fabricate porous silicon (PS) is studied. The porosity percentage is obtained by gravimetric analysis. The effect of different current densities; ...
    • Analysis of capillary filling in micro channels for passive fluid dynamics in Nano lab on chip domain 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Thikra S., Dhahi; M. Wesam, Al-Mufti; Khaled Emraje, Mohamed Elderjy (Trans Tech Publications, 2014)
      A fluid dynamics in a micro channel for analytical chemistry and different aspects of this type of flow for specific application has remained a long-acting problem in the last two decades considering its numerus applications ...
    • Application of gold nanoparticles for electrochemical DNA biosensor 

      Ahmed Mishaal, Mohammed; Ruslinda, Abdul Rahim, Dr.; Ibraheem Jaleel, Ibraheem; Foo, Kai Loong; Hasrul Hisham, Che Ahmad; Uda, Hashim, Prof. Dr.; Yarub, Al-Douri, Assoc. Prof. Dr. (Hindawi Publishing Corporation, 2014)
      An electrochemical DNA biosensor was successfully fabricated by using (3-aminopropyl)triethoxysilane (APTES) as a linker molecule combined with the gold nanoparticles (GNPs) on thermally oxidized SiOthin films. The SiOthin ...
    • Area-selective ZnO thin film deposition on variable microgap electrodes and their impact on UV sensing 

      Qazi Muhammad, Humayun; Muhammad Kashif, Muhammad Faroow; Uda, Hashim, Prof. Dr. (Hindawi Publishing Corporation, 2013)
      ZnO thin films were deposited on patterned gold electrodes using the sol-gel spin coating technique. Conventional photolithography process was used to obtain the variable microgaps of 30 and 43 μm in butterfly topology by ...
    • Bidirectional flow micropump based on dynamic rectification 

      Pei, Song Chee; Ruzairi, Abdul Rahim, Prof. Dr. ; Rashidah @ Siti Saedah, Arsat, Dr.; Uda, Hashim, Prof. Dr.; Loew,  Pei Ling, Dr. (Elsevier B.V., 2013)
      This paper proposes a new bidirectional pumping principle based on a dynamic rectification mechanism. The pump is composed of a moveable actuation platform and a gourd-shaped chamber, whose role is to behave as both a ...
    • A brief review of the current technologies used for the fabrication of metal-molecule-metal junction electrodes 

      Qazi Muhammad, Humayun; Uda, Hashim, Prof. Dr. (Scientific.Net, 2012-12)
      Fabrication techniques for Metal-molecule-metal junction electrodes suitable to study electron tunneling through metal junctions are reviewed. The applications of current technologies such as mechanical break junction, ...
    • Characterisation, analysis and optical properties of nanostructure ZnO using the sol-gel method 

      Muhammad, Kashif; Yarub, Al-Douri, Assoc. Prof. Dr.; Uda, Hashim, Prof. Dr.; Md. Eaqub, Ali; Syed Muhammad Usman, Ali; Willander, Magnus, Prof (Institution of Engineering and Technology (IET), 2012-02)
      Nanostructure ZnO was grown on thin aluminium layer, deposited on silicon substrate using the sol-gel method. The surface morphologies of nanostructure ZnO at different precursor concentrations were studied using scanning ...
    • Chrome mask design for microfluidic fabrication 

      Perumal, Veeradasan; Uda, Hashim, Prof. Dr. (Trans Tech Publications, 2013)
      This paper presents a simple and effective method to design chrome mask for microfludic fabrication. Microfluidic fabrication involves 9 major step and mainly depends on the master mold template formation by SU-8 photoresists ...
    • Comparative reliability studies and analysis of Au, Pd-coated Cu and Pd-doped Cu wire in microelectronics packaging 

      Gan, Chong Leong; Uda, Hashim, Prof. Dr. (Public Library of Science, 2013-11)
      This paper compares and discusses the wearout reliability and analysis of Gold (Au), Palladium (Pd) coated Cu and Pd-doped Cu wires used in fineline Ball Grid Array (BGA) package. Intermetallic compound (IMC) thickness ...
    • COMSOL Multiphysics Simulation in biomedical engineering 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr. (Trans Tech Publications, 2014)
      In the past two decades, COMSOL Multiphysics Software Package have emerged as a powerful tool for simulation, particularly in Nanotechnology and most importantly in biomedical application and various application involving ...
    • Conventional photolithography and process optimization of pattern- size expansion technique for nanogap biosensor fabrication 

      Balakrishnan, Sharma Rao; Muhammad Nurfaiz, Asri; Uda, Hashim, Prof. Dr.; Tijjani Adam, Shuwa (Trans Tech Publications, 2014)
      For a submicron photolithography process, there is little room for error. In this paper, an optimized technique for photoresist (PR) development is reported, to fabricate a nanogap biosensor for application in biomedical ...
    • Current trend in simulation: A study simulation of Poly-Silicon nanowire using COMSOL multiphysics 

      Uda, Hashim, Prof. Dr.; M. Wesam, Al-Mufti; Tijjani Adam, Shuwa (Trans Tech Publications, 2013)
      Poly-Silicon nanowire (Poly-Si-NW) simulations are very important field of nanotechnology and nanostructures; in this paper presented review in general nanowire and it applications such as thermoelectric device (TED) has ...
    • Design and fabrication of PDMS microchamber for fast reaction assays in biosensing application. 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; A.Wesam, Al-Mufti (Trans Tech Publications, 2013)
      A simple design of a microchamber for use in reacting assays with limited sample availability has been proposed, analyzed using COMSOL 3.5 Multiphysics simulation and fabricated using soft-lithography technique. The design ...
    • Design and fabrication of silicon nanowire based sensor 

      Siti Fatimah, Abd Rahman; Nor Azah, Yusof, Prof. Dr.; Uda, Hashim, Prof. Dr.; Mohammad Nuzaihan, Md Nor (Electrochemical Science Group (ESG), 2013)
      This paper reports the process development of silicon nanowires sensor requires both the fabrication of nanoscale diameter wires and standard integration to CMOS process. By using silicon-on-insulator (SOI) wafer as a ...
    • Design development of acoustic waves based sensitive sensors for Escherichia coli O157:H7 detection 

      Seng Teik, Ten; Uda, Hashim, Prof. Dr.; Ahmad, Sudin; Wei Wen, Liu; Kai Loong, Foo; N.H.M., Salleh; Hasrul, Hisham; Nazwa, T. (Trans Tech Publications Inc., 2014-04)
      Food contamination has become critical issue and is being worse due to the insensitive detection devices. One of the dangerous food contaminations is by Escherichia coli (E.coli) O157:H7, one of the harmful bacterial ...
    • Design of 3D micromixer for bio-synthesis using COMSOL multiphysics software package 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Leow, Pei Ling, Dr.; Foo, Kai Loong (American Scientific Publishers, 2013-12)
      Moving parts of micrometer scale make the chips very expensive and fragile and are therefore to be avoided if at all possible. An alternative method for transporting fluid in the samples is through capillary effect, the ...
    • Designing microchannels separator mask for lithography process 

      Shahrul Aizzam, Ariffin; Uda, Hashim, Prof. Dr.; Tijjani Adam, Shuwa (Trans Tech Publications, 2013)
      Recently microfluidic has drawn attention from fellow research because of their unique properties and behavior in biotechnology, biomedical, micro and nanotechnology. Microfluidic is a combination from several components ...
    • Development of interdigitated electrode molecular imprinted polymer sensor for monitoring alpha pinene emissions from mango fruit 

      Huzein Fahmi, Hawari; Nurul Maisyarah, Samsudin; Ali Yeon, Md Shakaff, Prof. Dr.; Supri, Abdul Ghani, Prof. Madya Dr.; Mohd Noor, Ahmad, Prof. Dr.; Yufridin, Wahab, Dr.; Uda, Hashim, Prof. Dr. (Elsevier B.V., 2013)
      Alpha Pinene is a type of terpene hydrocarbons commonly emitted in substantial amounts by plants such as mango. Using Interdigitated Electrode (IDE) structure, a sensor for detecting Alpha Pinene volatile by using molecular ...
    • Development of swine-specific DNA markers for biosensor-based halal authentication 

      Md. Eaqub, Ali; Uda, Hashim, Prof. Dr.; Muhammad, Kashif; Shuhaimi, Mustafa, Assoc. Prof Dr.; Yaakob, Che Man, Prof. Dr. (Fundacao de Pesquisas Cientificas de Ribeirao Preto (FUNPEC-RO), 2012-06)
      The pig (Sus scrofa) mitochondrial genome was targeted to design short (15-30 nucleotides) DNA markers that would be suitable for biosensor-based hybridization detection of target DNA. Short DNA markers are reported to ...
    • Disposable polymeric electromagnetic actuated micropump 

      Chee, Pei Song; Rashidah, Arsat, Dr.; Uda, Hashim, Prof. Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling (American Scientific Publishers, 2012-06)
      Abstract A polymer based disposable micropump was designed and evaluated for drug release and control mechanism. The micropump is constructed via hot embossing replication technique with poly(methylmethacrylate) as body ...