The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, three different sets of samples were prepared to compare the memristive behavior of single layer metal oxide which is zinc oxide (ZnO) as well as two composite ZnO and TiO2 double layer thin film samples. Spin coating method was selected to deposit ZnO and TiO2 solutions on indium tin oxide (ITO)/Glass substrate. Platinum (Pt) was used as the top metal electrode which had been deposited...
This paper presents the integrated readout interfacing circuit (IROIC) for extended gate field effect transistor (EGFET) to be used as pH sensor. Development of IROIC for EGFET is for the creation of single chip for smart sensors with low cost. Implementation of constant voltage constant current (CVCC) technique to this architecture, resulted in the variation of electrochemical potential can be monitored...
This project presents the fabrication and characterization of a memristor and its implementation in digital logic. The memristor was fabricated using TiO2 thin film using sol-gel spin coating technique sandwiched in between a Pt top electrode and a conductive ITO substrate to form the metal-insulator-metal (MIM) configuration. It was found that the fabricated device showed the pinch-hysteresis loop...
Integrated constant voltage constant current (CVCC) readout interfacing for EGFET electrochemical sensing is presented. Development of integrated CVCC readout circuit is lead to single chip smart sensor system with the low cost production. CVCC technique is commonly used in investigation of ionic activities solution. The design architecture of CVCC has been targeted to Silterra 0.13um technology with...
This paper demonstrates the fabrication method and reports the essential physical characterization of a memristive device with TiO2 or titania as an active layer. The memristive device was fabricated on glass substrate. Titania thin films were grown in two layers by RF-magnetron sputtering technique onto the substrates. The first layer is a titania layer etched by 1% HF (Hydrofluoric acid) before...
The deposition of Indium doped ZnO thin films using sol gel spin coating technique will be discussed in this paper. The concentrations of indium doping of the thin films were varied from 1.0–5.0 at. % indium. The effect of various doping concentrations 1.0–5.0 at. % indium on electrical, optical properties and gas sensing application were studied. The electrical properties were analyzed using I-V...
In this study, titanium dioxide (TiO2) thin films have been investigated as a sensing membrane of the extended gate field effect transistor (EGFET) for pH detection application. The sol-gel TiO2 has been prepared and spin coated onto the indium tin oxide (ITO) coated glass as a substrate. Then the TiO2/ITO test structures thin films were annealed for 15 min at different temperatures; 300 °C and 400...
Zinc oxide (ZnO) thin films were deposited by thermal chemical vapor deposition (TCVD) method. Gold (Au) metal was used as a catalyst to improve the growth of tetrapod ZnO structures. In this study, the substrates were deposited at 750°C to 800°C to study the temperature effect of tetrapod ZnO thin films. The surface morphology of ZnO thin films were characterized using field emission scanning electron...
Sol-gel method is used to deposit each of the Titanium Dioxide (TiO2) film coating layers to indicate the porosity and to see the thickness by each coating layers. The electrical properties were studied on the thickness variance. The surface morphologies of the prepared TiO2 film were observed by using Field Emission Scanning Electron Microscopy (FESEM) to investigate the evolution of TiO2 grains...
This paper presents the CMOS readout technique for extended gate field effect transistor (EGFET) based on the voltage divider circuit technique and indirect feedback readout interfacing circuit(ROIC). These circuits have designs using mentor graphic tools with 0.13μm silterra technology file. The investigation of this project focuses on the size ratio of EFGET, temperature compensation, and sweeping...
This paper investigates the electrical properties of metal-insulator-semiconductor (MIS) by varying the thickness of the semiconductor layer. The MIS device was fabricated using ZnO and PMMA: TiO2 nanocomposite as semiconductor and dielectric layer, respectively. Different thickness of ZnO films was obtained by varying the deposition speed from 500 to 3000 rpm. The electrical properties of MIS showed...
This paper investigated the effect of dielectric thickness to the electrical properties metal-insulator-semiconductor (MIS) device. The MIS device were fabricated having PMMA:TiO2 and ZnO as dielectric and semiconductor layer, respectively. The PMMA:TiO2 nancomposite dielectric film were deposited at different deposition speed from 1000, 2000, 3000, 4000, 5000, 6000 rpm. Results showed that there...
In this work, zinc oxide (ZnO) nanostructure was synthesized by thermal vapor deposition (TCVD) on various kinds of metal catalyst namely, gold (Au) and platinum (Pt). The thicknesses of the metal catalyst were varied (10 nm and 15 nm) to investigate the shape of the ZnO nanostructures. The metal catalyst was used as seed layer to facilitate the nucleation site for nanostructured growth. FESEM images...
The paper presents the memristive behavior of spin-coated titania thin films. The spin speed during the deposition was varied and their effect on the film thickness and thus, to the memristive behavior was studied. Sample deposited at 5000 rpm produced thinner film thickness which result in better switching behavior. The sample showed larger OFF to ON resistance ratio of 5. All samples were measured...
This paper presents an investigation on sputtered titanium dioxide (TiO2) thin film for application in the Extended-Gate Field Effect Transistor (EGFET) sensor application for pH detection. The TiO2 thin film was fabricated on conductive indium-tin oxide (ITO) covered glass by using RF Sputtering method. An EGFET proof-of-concept setup was constructed using a commercial FET as the transducer and the...
In this paper we study the hysteresis in metal-insulator-semiconductor (MIS) devices fabricated with nanocomposite poly (methyl methacrylate): titanium dioxide (PMMA:TiO2) on n-tyse Si as dielectric and semiconductor layers, respectively. The capacitance-voltage (C-V) and current-voltage (I-V) characteristic of MIS were studied as a function of different frequency varied at 10 kHz until 10 MHz. C-V...
Nanocrystalline silicon (nc-Si) thin films were deposited on polytetrafluoroethylene (PTFE, teflon) substrates using RF magnetron sputtering. The aim of this study was to study the physical and structural properties of nc-Si on the Teflon substrate. The thin films properties were examined by Raman spectroscopy and field emission scanning electron microscopy (FESEM). We found that at room temperature,...
This research is to investigate the dielectric properties of PMMA: TiO2 nanocomposite thin films. The experiments are conducted by varying the TiO2 concentration from 0wt%, 1wt%, 2wt%, 3wt%. The results indicate that dielectric properties of PMMA: TiO2 nanocomposite thin film is affected by the amount of TiO2 concentration added into PMMA solution. The thin film with 3wt% indicate the higher dielectric...
Layer-by-layer ZnO nanoparticles thin films were deposited using sol-gel spin coating technique. Zinc acetate dihydrate, 2-methoxyethanol and monoethanolamine were used in the ZnO solution. Different numbers of film layers were employed to study their effects to the physical, electrical and optical properties of the thin films. XRD patterns showed that the films were single crystalline with highly...
TiO2 thin films of various thicknesses were grown on glass substrates by Radio Frequency (RF) magnetron sputtering technique with sputtering power varied from 100W to 300W. The thickness of the thin films are measured using surface profiler KLA Tencor P-6 and it is observed that the thickness increased as the sputter power increased and uniformity is observed at sputtering power of 300W. Sputtering...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.