Sukreen Hana Herman

Sukreen Hana Herman
Universiti Teknologi MARA | UiTM · School of Electrical Engineering College of Engineering

PhD Materials Science (JAIST)

About

185
Publications
31,470
Reads
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774
Citations
Citations since 2017
46 Research Items
498 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
Sensing materials fabrication and characterization. Focusing on the development of Extended-Gate Field Effect Transistor (EGFET) sensors
Additional affiliations
April 2006 - September 2009
Japan Advanced Institute of Science and Technology
Position
  • PhD Student
March 2004 - present
Universiti Teknologi MARA
Position
  • Professor (Associate)
April 2001 - March 2003
Kanazawa University
Position
  • Postgrad Student

Publications

Publications (185)
Article
Full-text available
A highly selective and sensitive EGFET-pH sensor based on composite TiO2–PANI had been developed in this work. A sol-gel titanium dioxide (TiO2) and the composite of TiO2 with semiconducting polyaniline (PANI) were deposited using a simple spin-coating method on an indium tin oxide (ITO) substrate. The films have been explored as a sensing electrod...
Article
The post-deposition heat treatment process was studied to improve zinc oxide (ZnO) ‘s pH sensing performance as the sensing electrode (SE) of extended-gate field effect transistor (EGFET) pH sensor. The low-temperature chemical bath deposited ZnO nanostructured thin film was heated from 200 to 400 °C before being applied as the SE. The heat treatme...
Article
The effect of zinc oxide (ZnO) multilayer thin film thicknesses, deposited via the sol-gel spin coating technique, on the morphology, structural and optical properties of ZnO nanorods (ZNR) grown on the ZnO thin films were explored in this investigation. The ZNR was grown using the chemical bath deposition method on the ZnO thin film seed layer (SL...
Conference Paper
Full-text available
This paper presents a one-dimension (1D) eye tissue model to mimic retinal blood perfusion during retinal imaging photoplethysmography (iPPG) assessment in previous work. An uneven light source illumination and noise during the assessment can affect the extraction of backscattering light, hence alter the actual blood perfusion measurement. In this...
Article
Full-text available
Introduction: This paper presents a comparative study of an optical system of a smartphone-based ophthalmoscope to improve the image quality of retinal imaging photoplethysmography (iPPG). Methods: This study has developed two optical systems using WinLens 3D software. Design I employed the combination of best forms and aspheric lenses while Design...
Preprint
Full-text available
A SPICE model for extended-gate field-effect transistor (EGFET) based pH sensor was developed using standard discrete components. Capacitors and resistors were used to represent the sensing and reference electrodes in the EGFET sensor system and the values of the discrete component were varied to see the output of the transistor. These variations w...
Article
This paper presents the investigation of the thickness of the ZnO thin films by varying the number of deposition layers during the spin coating deposition process. ZnO thin films were deposited with a different number of layers (ranging from 1, 3, and 5), and the main purpose of this study is to explore the effect of the thickness on the properties...
Article
Full-text available
For this study, TiO2 thin film was fabricated using the sol-gel spin coating method. The fabricated film was then applied as a sensing membrane in an extended gate field effect transistor (EGFET) pH sensor system. The pH sensing performance of the sol-gel spin-coated TiO2 was evaluated in terms of sensitivity, linearity, and hysteresis where the va...
Conference Paper
Polymer plays vital role in assisting fibers (micro or nano) formation via electrospinning method. In this study polyvinylpyrrolidone (PVP) was used and the concentration of the polymer was manipulated by varying its weight percent in the sol-gel solution. From the images obtained, it was observed that solution with low polymer concentration produc...
Conference Paper
Zinc oxide (ZnO) nanorods were successfully prepared using two-step (spin-coating and chemical bath deposition) process. Indium tin oxide (ITO) substrate was used, and before the growth process, the seed layer of ZnO was prepared on the substrate. In this study, growth time or growth durations were varied, to study its effect towards ZnO nanorod pr...
Conference Paper
This paper presents the effect of different direction of bias voltage on the memristive behaviour of sputtered titania thin films by varying the I-V measurement with positive direction of bias voltage ranging from 0V to 5V, 5V to - 5V and -5V to 0V (0 V→+5 V→-5 V→0 V : positive loop) and negative direction of bias voltage ranging from 0V to - 5V, -...
Article
Full-text available
Non-structural protein 1 (NS1 protein) is becoming a commonplace biomarker for the diagnostic of early detection of dengue. In this study, we sought to use a label-free approach of detecting NS1 protein by harnessing fluidic-based memristor sensor. The sensor was fabricated using sol-gel spin coating technique, by which TiO2 thin film is coated on...
Article
Full-text available
PVA-ZnO composite nanofibers were successfully fabricated by electrospinning method. The effect of the deposition distance (the distance between the needle tip to the substrate) on the fiber diameter was investigated. The distance was varied from 4 cm to 20 cm and it was found out that the fiber diameter decreased as the distance increased. The fib...
Article
This study presents an investigation on copper oxide (CuO) composited with polyethylene glycol (PEG) thin film. The main objective for this compositing thin film is to explore and determine the characteristic of the thin film when the value of PEG is varied. In this study, PEG plays a role as phase change material (PCM), where this type of material...
Article
Full-text available
In this work a SPICE model was developed for metal-insulator-metal (MIM)-based memristors. The proposed model was achieved by combining the current conduction mechanisms with the dynamical state variable phenomenon. To account for ionic conduction in memristor, the Mott-Gurney law for ion hopping was incorporated in the state variable derivative. A...
Article
Full-text available
Growth of zinc oxide (ZnO) nanostructure on seeded indium tin oxide (ITO) via chemical bath deposition were presented in this study. Growth time is believed to have vital role in order to control the physical (morphology), optical and structural characteristics of ZnO nanostructures. Several growth time of ZnO nanostructure were varied (1 H – 3.5 H...
Article
Optical pH sensors offer a promising alternative method over the existence pH electrochemical sensor and other. Due to ability to achieve high performance, electrical passive operation, simplicity and price effectiveness. Recently, significant research efforts have been devoted to pH sensors for the detection of pH variation in high resolution shor...
Article
Full-text available
The fabrication and characterization of an optical fiber pH sensor for the detection range 2 – 7 are described. The sensing element was prepared by coating the uncladded middle portion of a multimode plastic clad silica fiber (PCF) with xerogel film of immobilized bromophenol blue (BPB) prepared by a sol-gel process. The exponential decay of the ev...
Article
Nanostructures of metal oxide semiconductors sensing membrane have received considerable attraction due to its large surface-to-volume ratios that leads to a short diffusion distance of the analyte towards the electrode surface, resulting in an improvement of pH sensitivities and response times. In this paper zinc oxide (ZnO) nanostructures were fa...
Article
Full-text available
Evolution of electronics equipment evolves rapidly with the technologies invented. Broadcasting field also transform from analogue devices system into file-based system. As a continuously used equipment, the lifespan is an important issue. To prevent breakdown, this broadcasting equipment must have a proper health inspection which provides an early...
Article
To realize the miniaturization of an extended gate field effect transistor (EGFET) based sensor, an all solid state phase electrodes are needed. This paper presents the facile fabrication of an integrated solid state electrode (ISSE) consisting a solid state silver/silver chloride (Ag/AgCl) reference electrode (RE) and ZnO nanostructures sensing el...
Article
Full-text available
This paper presents a correlation study between experimental results of titanium dioxide (TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> )-based memristors and various hyperbolic sine function models. The current–voltage (I-V) characteristics of sol-gel-derived TiO <sub xmlns:mml="http://w...
Article
Full-text available
Zinc oxide (ZnO) nanostructures were synthesized via thermal chemical deposition (TCVD) method and applied as the sensing membrane of an extended-gate field effect transistor (EGFET) pH sensor. The ZnO nanostructures undergone a post-deposition heat treatment with the temperature ranging from 200-500 °C for 15 min in air ambient. The influence of t...
Conference Paper
Solid-state materials have becomes essential in recent technological advancements. This study also utilized solid-state material but in form of thin films to sense hydrogen ions in solutions. Fabrication of ZnO thin film was done using sol-gel spin coating technique. In an attempt to increase the pH sensitivity of the produced film, prolonging of a...
Conference Paper
Full-text available
Al-doped zinc oxide (AZO) nanorods thin film were deposited on Au catalyst using RF sputtering at 300 °C. The 15 nm thickness Au catalyst were deposited on glass substrates by sputtering method followed by annealing for 15 min at 500 °C to form Au nanostructures on the glass substrate. The AZO thin films were then deposited on Au catalyst at differ...
Conference Paper
This paper demonstrates the transfer of graphene at low temperature using water bath. Graphene in water solution (highly opaque) was transferred onto Platinum/Glass (Pt/Glass) substrate and the technique involves no additional chemicals. We obtained high transparency and large area of graphene film that is free of contaminants. The transferred grap...
Conference Paper
The comparison between bilayer configurations were presented in this paper. TiO2 and ZnO layer configurations were manipulated in order to investigate which configuration produce highest sensing performance to be applied as EGFET pH sensor. Both of the materials were deposited together as the bilayer film. The configurations were manipulated betwee...
Article
In the field of aquaculture, optical sensor technology is beginning to provide alternatives to the conventional electrical sensor. Hence, the development and characterization of a multipoint quasi-distributed optical fiber sensor for oxygen measurement is reported. The system is based on 1 mm core diameter plastic optical fiber where sections of cl...
Article
Full-text available
This study presents an investigation on zinc oxide (ZnO) and titanium dioxide (TiO2) bilayer film applied as the sensing membrane for extended-gate field effect transistor (EGFET) for pH sensing application. The influences of the drying temperatures on the pH sensing capability of ZnO/TiO2 were investigated. The sensing performance of the thin film...
Article
Full-text available
Titanium dioxide, (TiO2) is transparent to visible light and excellent in optical transmittance. In this experiment, TiO2 thin films have been fabricated on glass substrates by sol-gel dip coating method. Sol-gel dip coating technique can provide corrosion protection performance and can produce thick coating. Due to the thick coating, the possibili...
Article
Full-text available
Memristor has become one of the alternatives to replace the current memory technologies. Fabrication of titanium dioxide, TiO2 memristor has been extensively studied by using various deposition methods. However, recently more researches have been done to explore the compatibility of other transition metal oxide, TMO such as zinc oxide, ZnO to be us...
Article
Full-text available
Since the emergence of memristor as the newest fundamental circuit elements, studies on memristor modeling have been evolved. To date, the developed models were based on the linear model, linear ionic drift model using different window functions, tunnelling barrier model and hyperbolic-sine function based model. Although using hyperbolic-sine funct...
Article
Full-text available
Zinc Oxide (ZnO) nanostructures were deposited using chemical bath deposition (CBD) technique in water bath at 95 °C for 4 h. Post-deposition heat treatment in air ambient at various temperature ranging from 200-600 °C for 30 min was applied in order to enhance the electrical properties of ZnO nanostructures as the sensing membrane of extended-gate...
Article
Full-text available
Recently, extensive researches have been done on memristor to replace current memory storage technologies. Study on active layer of memristor mostly involving n-type semiconductor oxide such as TiO2 and ZnO. This paper highlight a simple water vapour oxidation method at 423 K to form Cu/Cu2O electronic junction as a new type of memristor. Cu2O is a...
Article
The prediction of stocks in the stock market is important in investment as it would help the investor to time buy and sell transactions to maximize profits. In this paper, a Multi-Layer Perceptron (MLP)-based Nonlinear Auto-Regressive with Exogenous Inputs (NARX) model was used to predict the prices of the Apple Inc. weekly stock prices over a time...
Article
Zinc oxide (ZnO) thin films were deposited on Teflon substrates by radio frequency (RF) magnetron sputtering method at different substrate temperature. The dependence of residual stress on the substrate temperature was investigated in this work due to the growth process, the bombardment of energetic particles and process heating to the deposited th...
Article
Full-text available
2nd order pseudo-elliptic resonator topologies are presented in this paper. Based on the closed loop with coupled-line resonator, three 2nd order bandpass filter topologies were built. Each of these topologies offered pseudo-elliptic bandpass response with high selectivity that is suitable for RF and wireless applications. The main advantage of the...
Article
Full-text available
Two types of memristor sensor were fabricated using two different TiO2 deposition methods of sputtering and sol-gel spin coating. The surface morphology of the sensors and the behaviour of the sensors were analysed by using scanning electron microscopy with energy dispersive x-ray system and I-V characterisation system respectively. The sensors wer...
Conference Paper
K-Means Clustering is one of the method for image segmentation which will subtract the interest area from background. By using K-Means Clustering, thermal image is divided into 2 layers which separates the hotter region from the background image. This will ease the hot spot detection on thermal infrared images. This paper presents work on the imple...
Conference Paper
ZnO-Graphene material has been proven to show the effect of memristive behaviour. Consequently, a good memristive performance in devices of such materials has the potential in non-volatile memory applications. However, little is known about the significance of nanostructure in making the devices more conductive, thereby improving their performance....
Conference Paper
Thermal infrared is an alternative method in determining the thermal distribution in almost everything. Thermal infrared camera captures the raw thermal images. These raw thermal images most likely to have an unwanted entities. To have an accurate setup especially in hot spot detection system, the raw image must be properly processed. By applying t...
Conference Paper
This work focuses on the memristive behaviour of zinc oxide-based memristive device that was prepared by sol-gel spin coating technique to deposit ZnO. The substrate used is ITO as the bottom electrode. The top electrode is platinum. The deposited thin films were; one non-annealed sample and the rest are annealed for 30, 60 and 120 minutes each und...
Conference Paper
Optical absorption spectra of dye doped in polyaniline (PANI) sol-gel films for sensing of pH solutions have been investigated. Accordingly, the glass substrate was coated by dip coating by sol-gel method. The surface morphological and optical characterizations of the deposited films were carried out using Atomic Force Microscopy (AFM) and UV-Vis s...
Article
Full-text available
Titanium dioxide (TiO 2 ) thin films were sputtered by radio frequency (RF) magnetron sputtering method and have been employed as the sensing membrane of an extended gate field effect transistor (EGFET) for pH sensing detection application. The TiO 2 thin films were deposited onto indium tin oxide (ITO) coated glass substrates at room temperature a...
Conference Paper
The work focuses on the effect of different annealing temperature on the ZnO-based memristive device. Zinc oxide was deposited on the ITO substrate by sol-gel spincoating technique. The deposited ZnO thin films were then annealed from 50°C to 450°C in a furnace for 60 minutes each. The electrodes Platinum (Pt) were sputtered by using JEOL JFC-1600...
Conference Paper
EGFET pH sensor is one type of pH sensor that is used to measure and determine pH of a solution. The sensing membrane of EGFET pH sensor plays vital role in the overall performance of the sensor. This paper studies the effects of different annealing temperature of the TiO2 sensing membranes towards sensitivity of EGFET pH sensor. Sol-gel spin coati...
Conference Paper
In this study, titanium dioxide (TiO2) and zinc oxide (ZnO) bilayer film for pH sensing application will be presented. TiO2/ZnO bilayer film with different speed of spin-coating process was deposited on Indium Tin Oxide (ITO), prepared by sol-gel method. This fabricated bilayer film was used as sensing membrane for Extended Gate Field-Effect Transi...
Article
In this research, metal oxides (ZnO and TiO2) thin films were fabricated by the sol-gel spin coating method. The thin films were applied as the pH sensing membrane for the extended-gate field effect transistor (EGFET) sensor to distinguish the sensing capability between them. The surface morphology, thin film components and crystalline quality were...
Article
An extended gate field-effect transistor (EGFET) of ZnO/TiO2 bilayer film as pH sensor was demonstrated in this paper. The sol-gel zinc oxide (ZnO) and titanium dioxide (TiO2) were prepared and spin coated onto indium tin oxide (ITO) coated glass substrate. After deposition process, this bilayer film then was annealed from 200°C up to 700°C. EGFET...
Article
Full-text available
Titanium dioxide (TiO2) thin films were fabricated on indium tin oxide (ITO) glass substrates using the spin coating technique and further were implemented as sensing membranes of the extended gate field effect transistor (EGFET) based pH sensor. The as-deposited thin films were annealed at different temperatures from 200 - 600 °C in room ambient f...
Article
Study on the SPICE model for nanostructured titania based memristor was carried out. Nanostructured titania thin film was deposited and a memristive device based on the nanostructured film was fabricated and characterized. Various reported SPICE models were applied to simulate the memristive behavior. The parameters for each model were optimized. T...
Article
Full-text available
The fabrication and characterization of an optical fiber oxygen sensor based on oxygen fluorescence quenching are described. The sensors are prepared by coating the oxygen sensitive indicator (tris-BP ruthenium (II) chloride and platinum octaethylporphyrin) that is immobilized by the sol-gel route onto the uncladded middle portion of a multimode pl...
Article
Full-text available
Titanium dioxide (TiO 2 ) thin films were applied as the sensing membrane of an extended-gate field-effect transistor (EGFET) pH sensor. TiO 2 thin films were deposited by spin coating method and the influences of the spin speed and spin duration on the pH sensing behavior of TiO 2 thin films were investigated. The spin coated TiO 2 thin films were...
Article
Full-text available
An integrated Readout Interfacing Circuit (ROIC) for resistive-based sensors using SILTERRA CMOS 0.13μm technology that reads resistance shift and converts it to voltage was designed. In conventional practice, resistive-based sensors are interfaced with Wheatstone bridge to transform the sensor signal to voltage. Due to low sensitivity of Wheatston...
Article
Full-text available
Amputees seldom experience from physical difficulties due to their incapability to use their extremities. To aid the amputees in acquiring an operative replacement fingers at a feasible cost, a 3D printed prosthetic fingers model interfaced with Readout Interfacing Circuit (ROIC) and a microcontroller is presented. A resistive-voltage as well as se...
Conference Paper
This paper presents the three stage CMOS operational amplifier (op amp) with class A output stage designed in SilTerra's 130 nm CMOS technology. The designed three stage op amp employed an indirect feedback compensation technique produces an open loop gain (AOL) , for both schematic and layout are 102 dB and 117 dB respectively. the op amp produces...
Article
Full-text available
This paper presents the memristive behavior of zinc oxide thin films deposited on ITO substrate by sol-gel spin coating technique. The spin coating speed was varied from 1000 rpm to 5000 rpm to study the effect it has on the memristive device fabricated. The electrical properties were characterized by using a two-point probe IV (current-voltage) me...
Article
Full-text available
Composite titanium dioxide (TiO2) and zinc oxide (ZnO) thin films were deposited on indium tin oxide (ITO) substrates using sol-gel spin coating technique. The electrical and physical characterizations of three different sol-gel spin coating speed were investigated using two-probe current-voltage (I-V) measurement, field emission scanning electron...
Article
Full-text available
On behalf of the Organizing Committee of ICEDSA2015, and with great pleasure, we would like to welcome all delegates to Kuala Lumpur, Malaysia. Being held from 14th to 15th September 2015 at Hotel Istana, Kuala Lumpur, the event is co-sponsored by the Faculty of Electrical Engineering, Universiti Teknologi MARA (UiTM), Malaysia, and the American Un...
Article
Full-text available
DRAM has been approaching its maximum physical limit due to the demand of smaller size and higher capacity memory resistor. The researchers have discovered the abilities of a memristor, a Non Volatile Memory (NVM) that could overcome the size and capacity obstacles. This paper discussed about the deposition of zinc oxide (ZnO) on indium tin oxide (...
Article
Full-text available
Titanium dioxide (TiO2) thin film was deposited on indium tin oxide (ITO) substrate and used as sensing membrane of EGFET pH sensor. The thin film was fabricated using sol- gel spin coating method. All samples were annealed at 400 °C but the annealing time was varied. This is done to study the effects of annealing time on physical and electrical pr...
Article
Full-text available
This paper presents an investigation on titanium dioxide (TiO2) and zinc oxide (ZnO) bilayer film, which is used as sensing membrane for extended-gate field effect transistor (EGFET) for pH sensing application. TiO2/ZnO thin films were deposited using sol-gel spin coating method on indium tin oxide (ITO) substrates. After the deposition, the bilaye...
Conference Paper
Full-text available
This paper studies the behavior of fluidic based memristor sensor in detecting glucose liquid. Two types of memristor sensors were produced using two different deposition methods which were physical vapor deposition (PVD) method and sol-gel spin coating method. The equipment used in doing the PVD was radio frequency (RF) sputtering machine, and nor...