Institute of Nano Electronic Engineering INEE

Kuala Perlis, Malaysia

Institute of Nano Electronic Engineering INEE

Kuala Perlis, Malaysia
SEARCH FILTERS
Time filter
Source Type

Adam T.,Institute of Nano Electronic Engineering INEE | Adam T.,University Malaysia Perlis | Hashim U.,Institute of Nano Electronic Engineering INEE
AIP Conference Proceedings | Year: 2017

The study presents an investigation into the effect of chitosan-CNT modification of silicon nanowire on DNA binding chemistry for the perfect attachment of ssDNA adhesion. MWCNT were purified through refluxing in concentrated HNO3 (V/V, 1:1) mixture for 2 hours at 55°C mixture of MWCNT-chitosan solution was prepared first immobilized on the Si surface. The surface was characterized by UV-vis measurement, Scanning Electrons microscope (SEM) and Fourier transform infrared spectroscopy (FTIRs) and series of electrical test were conducted to investigate the effect of MWCNT-chitosan concentration on the performance of the surface binding chemistry with Si-wire and chitosan-CNT modified. The results showed that the chitosan-CNT modification produced good probe adhesion and improve electrical properties. the took the advantage of CNTs with -COOH groups on silicon nanowire dispersed among chitosan containing -NH2 groups due to the peptide bonds formed between -COOH and -NH2 and due nanowire large surface area-to-volume ratio promises high sensitivity. We have established reliable procedure for the functionalization and is tapproach will allow a variety of species to be sensed on nanowire device. © 2017 Author(s).


Adam T.,Institute of Nano Electronic Engineering INEE | Adam T.,University Malaysia Perlis | Hashim U.,Institute of Nano Electronic Engineering INEE
AIP Conference Proceedings | Year: 2017

The study report novel, yet simple and flexible fabrication method for micro channel patterning PDMS thin mold on glass surfaces, the method allows microstructures with critical dimensions to be formed using PDMS. Micro channel production is a two-step process. First, soft photolithography methods are implemented to fabricate a reusable mold. The mold is then used to create the micro channel, which consists of SU8, PDMS and glass. The micro channel design was performed using AutoCAD and the fabrication begins by creating a replicable mold. The mold is created on a glass slide. by spin-coating speed between 500 to 1250rpm with an acceleration of 100 rpm/s for 100 and 15 second ramp up and down speed respectively. Channel flow rate based on concentration were measured by analyzing the recorded flow profiles which was collected from the high powered microscope at. 80μ, 70μm, 50μm for inlet channel 1, 2, 3 respectively the channel flow were compared for flow efficiency at different concentrations and Re. Thus, the simplicity of device structure and fabrication makes it feasible to miniaturize it for the development of point-of-care kits, facilitating its use in both clinical and non-clinical environments. With its simple geometric structure and potential for mass commercial fabrication, the device can be developed to become a portable photo detection sensor that can be use for both environmental and diagnostic application. © 2017 Author(s).


Adam T.,Institute of Nano Electronic Engineering INEE | Adam T.,University Malaysia Perlis | Hashim U.,Institute of Nano Electronic Engineering INEE
AIP Conference Proceedings | Year: 2017

Novel, highly sensitive Si-NWs with the length of 200μm, with size of 15nm were fabricated using basic standard CMOS processes, Reactive ion etching (RIE) and Buffered Oxide Etching (BOE). FESEM micrograph was used to observe the defining and trimming results. With this process, the width of the wires is decreased from the initial, larger 1μm dimensions to approximately 15nm in a controllable and convenient way. The device is pre-treated with higher pH DI for the mobile carriers to be accumulated at the inner surface of silicon nanowire and nine standard aqueous pH buffer solutions: pH2, pH3, pH 4, pH 5, pH6, pH8 and pH9 were used to test the electrical response of the device. The SiNWs sensor show the highest resistance value for pH 2 and the lowest resistance value for pH 9. In terms of sensitivity, the device with smaller nanowire is found to be more sensitive than larger nanowire as a result of the high surface-to-volume ratio and the measurements were done for 5 times on each sample in 24 hours after the nanowire sensor is immersed in DI water overnight (∼24hours), the pH sensitivity is reproduced at every internal. This tendency is repeated in for all the samples. Hence, the fabricated device has demonstrated the potential device in the pH level detection. © 2017 Author(s).


Haarindraprasad R.,Institute of Nano Electronic Engineering INEE | Hashim U.,Institute of Nano Electronic Engineering INEE | Gopinath S.C.B.,Institute of Nano Electronic Engineering INEE | Gopinath S.C.B.,University Malaysia Perlis | And 6 more authors.
PLoS ONE | Year: 2015

The performance of sensing surfaces highly relies on nanostructures to enhance their sensitivity and specificity. Herein, nanostructured zinc oxide (ZnO) thin films of various thicknesses were coated on glass and p-type silicon substrates using a sol-gel spin-coating technique. The deposited films were characterized for morphological, structural, and optoelectronic properties by high-resolution measurements. X-ray diffraction analyses revealed that the deposited films have a c-axis orientation and display peaks that refer to Zn O, which exhibits a hexagonal structure with a preferable plane orientation (002). The thicknesses of ZnO thin films prepared using 1, 3, 5, and 7 cycles were measured to be 40, 60,100, and 200 nm, respectively. The increment in grain size of the thin film from 21 to 52 nm was noticed, when its thickness was increased from 40 to 200 nm, whereas the band gap value decreased from 3.282 to 3.268 eV. Band gap value of ZnO thin film with thickness of 200 nm at pH ranging from 2 to 10 reduces from 3.263eV to 3.200 eV. Furthermore, to evaluate the transducing capacity of the ZnO nanostructure, the refractive index, optoelectric constant, and bulk modulus were analyzed and correlated. The highest thickness (200 nm) of ZnO film, embedded with an interdigitated electrode that behaves as a pH-sensing electrode, could sense pH variations in the range of 2-10. It showed a highly sensitive response of 444 μAmM-1cm-2 with a linear regression of R2 =0.9304. The measured sensitivity of the developed device for pH per unit is 3.72μA/pH. © 2015 Haarindraprasad et al.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Zaki M.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This paper presents the development of gas chamber for testing and characterization of gases with different concentrations. By using glass as the chamber material, it able to provide strong and air-tight structure and prevent odor chemical gases from leaking which can effect the environment. The glass chamber also enables easy monitoring (from the external) of the hardware connections, to ensure that they are always intact and in good condition. The measurement plate in the chamber consists of a copper probe, sensor, heater and conductor. A temperature within the range of 200 °C to 300 °C is required to activate the sensing mechanism. Initial testing shows that the chamber provides well enclose environment for gases detection. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Zaki M.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This paper studies the development of portable electronic reader for detection of formaldehyde gas sensor. This electronic reader can detect the level of formaldehyde concentration, which later translated into voltage level by using PIC 18F4580 microcontroller. Result shows that high concentration of chemical gas, which decoded to high voltage signal can be displayed on screen reader. Three level of detection is set in the programming i.e. reject, quarantine and low-level voltage conditions which translated into high, medium and low concentration of gas respectively. Finally, the result detected by portable electronic reader is correlated well with real-time PC based multi-meter detection. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Puah A.Y.P.,Institute of Nano Electronic Engineering INEE | Voon C.H.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

As technology advanced from bulky to the tremendous miniature feature size devices, the patterning process changes according to the technology in order to improving the quality of producing a tiny device. However, in research experiment, costing and ease of use is well preferred rather than high throughput outputs. Hence, such low cost photolithography technique which is a crucial part in fabrication process begins from mask design is introduced. A common mask printing on transparency film via inject printers comes in handy for low cost fabrication together with time saving and easy to generate. The only drawback is that printing dimension must not less than 100μm and definitely the bigger the size, the better the resolution of the transparency mask. On the other hand, the less devices that able to fit in a wafer. Design of this mask drawn using AutoCAD drawing tools using multiple trimmed circles that combined with a pair of contact pad. Tangible printed mask enable the next steps of photolithography to be proceed and patterns occurs upon completion. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Nadzirah S.,Institute of Nano Electronic Engineering INEE | Azizah N.,Institute of Nano Electronic Engineering INEE | And 2 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This Detection of specific biomolecules increases interest in the development of biosensor especially for its applicability and complexity. Biomolecules and nanomaterials are the two issues that researchers used to improve electrical signal originating from biochemical reactions. Titanium dioxide nanoparticles (TiO2) on aluminium electrodes-based DNA biosensor were fabricated using conventional photolithography. This device rapidly response since the data comes out quantitatively In order to create a chemical reaction between DNA and the nanoparticles surface, a surface treatment process has been done namely silanization. APTES is used as a coupling agent of TiO2 towards DNA as DNA cannot be directly bonded with the TiO2 surface. Hence, surface modification using APTES diluted in different solvents for further DNA detection is studied. Only certain solvents are suitable to be diluted with APTES and able to generate conductivity. Hence, the conductivity was measured to identify the reaction between the APTES and TiO2 nanoparticles. APTES diluted in acetone gives unreadable conductivity. © 2015 IEEE.


Razak A.R.A.,University Malaysia Perlis | Hashim U.,Institute of Nano Electronic Engineering INEE | Norlia M.I.,University Malaysia Perlis | Hasan S.,University Malaysia Perlis | Shukri F.R.,University Malaysia Perlis
Proceedings of the 2013 IEEE 7th International Power Engineering and Optimization Conference, PEOCO 2013 | Year: 2013

Compact fluorescent lamps are tested under DC operating conditions. Five random samples are evaluated in term of their starting and operation response compared to normal AC environment. Experiment result shows that DC line supply has successfully able to start and operate any conventional CFL at almost the same lux level and power consumption rate of 240ac rms. © 2013 IEEE.


Gan C.L.,Institute of Nano Electronic Engineering INEE | Hashim U.,Institute of Nano Electronic Engineering INEE
2015 10th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2015 - Proceedings | Year: 2015

This paper compares and discusses the influence of shear strength {in terms of (SPMS) shear-per mils-square} of Au and Cu ball bonds on the biased humidity reliability performance in SOIC 8LD leaded package. Biased HAST (Highly Accelerated Temperature and Humidity Stress Test, 130°C, 85%RH) has been carried out to estimate the long term reliability of Au and Cu ball bonds. Lognormal reliability plots have been plotted for the three legs (Control, leg 1 and leg 2) whereby leg 2 is identified to have better mean-time-to-failure (t50) compared to other two legs. Open failure from biased HAST 96 hours, 192 hours are subjected for SEM cross-sectioning and found typical interfacial CuAl IMC (intermetallic compound) corrosion microcracking. HAST failure rates have been analyzed and the Cu ball bond lifetime has been established by using Peck model. The obtained Cu ball bond lifetime, of leg 2 is greater than 25 years and belongs to wearout reliability data point. This proves significant influence of SPMS on biased HAST failure rate. The higher the ball bond shear strength the lower the failure rate of biased HAST test. Hence, we should implement control on the average SPMS of ≥ 7.50 g/mil2. However, the minimum SPMS should have been controlled at minimum ≥ 6.5 g/mil2. © 2015 IEEE.

Loading Institute of Nano Electronic Engineering INEE collaborators
Loading Institute of Nano Electronic Engineering INEE collaborators