In this paper, we propose fast, highly sensitive, and wide-dynamic-range fiber-optic probe-type biosensors to detect pH glucose. The operation principle of the proposed is based on Fabry-Perot interferometry technique. Three pH-sensitive dyes (methyl orange, methyl red, thymol blue) three solvatochromic (Nile rhodamine-B, 4-amino-N-methylphthalimide) were individually mixed with polymers obtain five pHand glucose-sensitive sensing membranes. These membranes subsequently deposited eight gold...

In this paper, we proposed a new type high sensitive volatile organic compounds (VOCs) gas sensor array that is based on the pulse width modulation technique. Four different types of solvatochromic dyes and two polymers, were used to make five sensing membranes. These deposited side-polished optical fibers by spin coater elements array. order ascertain effectiveness sensors, VOC gases tested. Finally, principal component analysis (PCA) has been discriminates VOCs.

In this study, we designed and developed an interdigitated capacitor (IDC)-based taste sensor array to detect different substances. The sensing has four IDC elements. elements of the are fabricated by incorporating types lipids into polymer, dioctyl phenylphosphonate (DOPP) tetrahydrofuran (THF) make respective dielectric materials that individually placed onto electrode (IDE) via spin coating. When material element comes contact with a substance, its properties change capacitance element;...

In this paper, we propose a volatile organic compound (VOC) gas sensing system with high sensitivity and wide dynamic range that is based on the principle of heterodyne frequency modulation method. According to method, time period signal shift when Nile Red containing VOC-sensitive membrane fiber-optic element comes into contact VOC. This produces strong, fast reversible signals exposed VOC gases. The response recovery times proposed were less than 35 s, good reproducibility accuracy obtained.

We developed a new class of compact wavelength blocker (WB) array based on liquid crystal silicon (LCOS), which enables per-channel control not only the optical transmission power level but also channel center and bandwidth independently. demonstrate an integrated device with WB having 12 input/output ports for 50-GHz-spaced International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) channels over entire C-band. The can be adjusted independently minimum setting...

In this paper, we propose a temperature/thermal sensor that contains Rhodamine-B sensing membrane. We applied two different methods, namely, fiber-optic pulse width modulation (PWM) and an interdigitated capacitor (IDC)-based temperature to measure the from 5 °C 100 °C. To best of our knowledge, PWM-based is reported for first time in study. The proposed PWM has good ability; its sensitivity ~3.733 mV/°C. designed temperature-sensing system offers stable responses over wide dynamic range,...

In this paper, we proposed an interdigitated capacitor (IDC)-based glucose biosensor to measure different concentrations of from 1 μM M. We studied four types solvatochromic dyes: Auramine O, Nile red, Rhodamine B, and Reichardt’s dye (R-dye). These dyes were individually incorporated into a polymer [polyvinyl chloride (PVC)] N,N-Dimethylacetamide (DMAC) solution make the respective dielectric/sensing materials. To best our knowledge, report for first time IDC biosensing system utilizing...

We have designed and developed a compact, contactless, chipless, high frequency wireless passive LC pressure sensor tag capable of measuring from 0 Pa to 60 kPa. The design consists parallel combination planar inductor sensitive interdigitated capacitor (IDC). readout or signal detection processing system combines Colpitts oscillator, different electronic circuits, microcontroller-based unit. Operation the is based on mutual coupling oscillation coil oscillator. IDC electrodes melamine foam...

Here, we designed and developed an organic field-effect transistor (OFET)-based gas sensor by applying solvatochromic dye (Nile red, NR) with twisted intramolecular charge-transfer (TICT) behavior depending on the polarity of surrounding molecules, as auxiliary NR sensing medium (aNR-SM). As a polar molecule approaches, intra-charge transfers from donor diethylamine group to ketone occur in molecule, resulting twisting functional thereby increasing its dipole moment. Using this...

In this paper, an electronic tongue/taste sensor array containing different interdigitated capacitor (IDC) sensing elements to detect types of tastes, such as sweetness (glucose), saltiness (NaCl), sourness (HCl), bitterness (quinine-HCl), and umami (monosodium glutamate) is proposed. We present for the first time IDC tongue using membranes solvatochromic dyes. The proposed highly sensitive (30.64 mV/decade sensitivity) has fast response recovery times about 6 s 5 s, respectively, with...

We proposed an interdigitated capacitor (IDC)-based temperature sensor that can measure temperatures from 0 °C to 120 °C. The principle of operation the depends on variation capacitance as IDC becomes warmer. Graphene oxide, a well-known conductive polymer, was mixed with polyvinylpyrrolidone polymer prepare temperature-sensitive dielectric sensing solution. This solution then deposited electrode by spin coater sensor. designed has good ability and offers stable responses over broad range....

In this study, we propose a highly sensitive multichannel pH sensor that is based on an optical-fiber pulse width modulation (PWM) technique. According to the PWM method, received sensing signal's changes when sensing-element of array comes into contact with buffer solutions. The proposed pH-sensing system offers linear response over wide range values from 2 12, high ability. sensitivity 0.46 µs/pH, and correlation coefficient R² approximately 0.997. Additional advantages include short/fast...

A passive radio frequency-identification-based inductor-capacitor (LC) lactate sensory system with a specific dye-containing interdigitated capacitor (IDC) in which the sensing signal is amplified by solvatochromic effect proposed. When solution contacts IDC of LC sensor, capacitance changes, changing resonance frequency sensor. This changes oscillation Colpitts oscillator readout circuit. By analyzing concentration can be measured quickly and accurately over wide range. To our knowledge,...

Abstract The representatively chronic problems of the piezoresistive‐type sensing media containing conductive fillers such as carbon nanotubes are dispersion problem when composited with a high content for securing certain conductivity and low reliable sensor performance owing to hysteresis signals. Therefore, this study introduces piezoresistive medium multilayered parallel structure resistors which effectively reduces resistance stabilizes signal. multiparallel resistor (MPR)...

The crystalline and morphological structures of polymer semiconducting films were controlled by selecting appropriate thermal properties the polymeric chains, thereby improving field-effect transistor (FET) performances. Poly(dioctyl-quaterthiophene-dioctyl-bithiazole) (PDQDB), comprising 5,5′-bithiazole oligothiophene rings, was used as basis for semiconductor studies. Tg Tm values thin-film state, rather than those bulk important in this study. A PDQDB film with a 101 °C state showed...

We systematically demonstrated the effects of surface modification gate dielectrics and thermal annealing an ad-deposited polymer semiconducting film on electrical performance organic field-effect transistors in which they were incorporated. Chemically or energetically engineered designed by introducing various end-functional groups (CF3, CH3, NH2, Cl, SH). Poly(dioctyl-quaterthiophene-dioctyl-bithiazole) (PDQDB), consisting 5,5′-bithiazole oligothiophene rings, was employed as...

In this paper we design and develop a highly stable low cost regulated DC power supply for Geiger Müller (GM) Counter/detector.A high voltage is an important source to bias gasdischarge tubes, X-ray radiation detectors etc.A stabilized 575 volts was developed using the pulse width modulation (PWM) control technique from 5 volt supply.It specially designed biasing GM detector area monitor.The output can be adjusted at any suitable value by adjusting preset potentiometer.

In our study, we designed and developed a glucose biosensor that operates without battery or chip. This utilizes the principles of radio frequency (RF) to operate. For construction glucose-sensitive interdigitated capacitor (IDC), famous substance called phenylboronic acid (PBA) is combined with polyvinyl chloride (PVC) n,n-dimethylacetamide (DMAC) solution. According theory sensing, resonance shifts whenever there change in capacitance IDC. caused by fluctuations concentrations. As far as...

Orthogonal frequency-division multiplexing (OFDM) is one of the promising techniques for modern mobile wireless data systems. For OFDM systems with co-channel interference, adaptive beamformer can be used interference suppression. This paper focuses on a key issue algorithm. In this paper, we have proposed an algorithm that based least square-constant modulus (LS-CM) property signals. The effectively suppress interference. Finally, simulation results confirm efficacy beamforming investigated...