In this research, we developed a wearable temperature-sensing element by dip dyeing threads in poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) (p-type conducting polymer) solution. The PEDOT:PSS was used to dye the textile and it exhibited negative temperature coefficient characteristics which resistance decreases as increases. fabricated temperature-detection thread achieved sensitivity of 167.1 Ω/°C with 99.8% linearity range -50 °C 80 °C. We anticipate that sensors...

Abstract InGaAs-based photodetectors have been generally used for detection in the short-wave infrared (SWIR) region. However, epitaxial process to grow these materials is expensive; therefore, are limited space exploration and military applications. Many researchers expended considerable efforts address problem of SWIR photodetector development using lead sulfide (PbS) quantum dots (QDs). Along with their cost-efficient solution processability flexible substrate compatibility, PbS QDs...

This paper presents a ring oscillator with the function of oscillation controlled for wireless sensor systems (WSSs). The proposed consists NAND gate, 4 inverters, and 1-, 3-, 9-times buffer stage. Operation it is by gate. can reduce power loss because oscillated during only high level input. was designed fabricated 2.5 μm CMOS technology, through which possible to realize WSS on single chip an be concurrently. frequency tuning range found approximately 90–152 MHz output −8.42 dBm. measured...

In this research, we developed a wearable temperature-sensing element by dip dyeing threads in poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) (p-type conducting polymer) solution. The PEDOT:PSS was used to  dye the textile and it exhibited negative temperature coefficient characteristics which resistance decreases as increases. fabricated temperature-detection thread achieved sensitivity of 167.1 W/°C with 99.8% linearity range -50 to 80 °C. We...

Abstract Transparent conducting electrodes (TCEs) have attracted considerable attention towards the development of flexible optoelectronic devices. In this study, mixed-dimensional TCEs are fabricated based on two-dimensional graphene and one-dimensional electrospun metal fiber that can address shortcomings each electrode. comparison with other TCEs, Ag fiber/graphene hybrid exhibited a highly stable morphology (67% lower peak-to-valley ratio), low sheet resistance (approximately 11 Ω/sq),...

This paper reports on fabrication and characterization of Schottky barrier diodes, which were obtained by contacts between aluminum electrodes phosphorous-doped single crystalline silicon layer silicon-on-insulator (SOI) structure. Our photodetectors (PDs) with this structure have advantages, are simple process compatible complementary metal-oxide-semiconductor devices. The detector performed the highest external quantum efficiency 0.397 at 360 nm in ultraviolet spectral range compared other...

This paper presents the radio frequency (RF) transmitter using pulsewidth modulation (PWM) method. The proposed can perform with lower power consumption compared to other RF transmitters a conventional ring oscillator because voltage-controlled (VCO) is operated by ON-/OFF-time of PWM signal. Moreover, VCO metal-oxide semiconductor switch reduce significantly due reduction idle current loss. dissipation measured as 0.75 mW at carrier 315 MHz. transmission modulated signal performed on-chip...

This paper presents a wireless smart sensor (WSS) with thermoelectric sensor, transmitter and small spiral antenna on single package. To transmit signal, the was designed to consist of an amplifier, modulator, oscillator, buffer stage antenna. The used dual pulse position modulation for low-power transmission. fabricated has sampling frequency 2.6 kHz output carrier wave 300 MHz band due higher far field radiation transmitted signals from inside body. size chip transmission waves. bandwidth...

The wireless smart sensors have been proposed for high-risk and chronically ill patients. radio frequency (RF) transmitter is necessary to fabricate sensors. This paper presents temperature (WSTS) with sensor the complementary metal-oxide-semiconductor (CMOS) RF using pulse width modulation (PWM) method. major advantage of PWM a performance low consumption power. In this paper, was fabricated silicon on insulator (SOI) structure, circuitry designed simulated. WSTS consists PWM. With method,...

To change the DC voltage from radio frequency signal (800 MHz) of on-chip reception antenna was successful. As a result, rectifier using possible to supply power 1.9 V / 1 mA at distance 3 cm. It confirmed that fabricated touch driven oscillator (TDO) operated successfully, when finger with conductive part touched. The carrier 300 MHz is transmitted through transmission antenna, touched between two metal electrodes. Utilization and allows realizing wireless battery-free oscillator. proposed...

This paper presents the Inkjet-printed strain gauge using PEDOT:PSS. The (width 0.6 mm, length 20 thickness <TEX>$0.3{\mu}m$</TEX>) was printed on PET film PEDOT:PSS ink. resistance variation of fabricated measured by digital multi-meter with displacement range -4 to 10 mm. As result, (<TEX>${\Delta}R/R_0$</TEX>) has approximately 0.75%, linearity 99.87%. is expected various applications such as tape type pressure sensor, PMS(pressure mapping sensor), wearable devices.

In this study, we present a hybrid wireless smart temperature sensor using thermoelectric and transmitter. The SOI structure consists of 17 pairs n- p-type single-crystal silicon strips selective absorption area. sensitivity the fabricated was found to be approximately 190μV/°C. transmitter an amplifier, modulator oscillator. dual pulse position modulation method uses two narrow pulses for transmitter, distance between describes amplitude input signal. Oscillator with oscillation control...

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been extensively studied as the active material in ammonia gas sensor because of its fast response time, high conductivity and environmental stability. It is well known that a post annealing process for organic devices based on PEDOT:PSS significantly increases device performance. In this study, we propose solvent investigated effects. As results, lead to surface chemical physical properties change. These changes result...

In this paper, we fabricated an apparatus of the electro-chemical discharge drilling for boring narrow through-hole into a glass. electrolyte, creates high temperature condition by electro-discharge energy. Therefore, glass are removed accelerated chemical reaction with glasses and chemicals in condition. For optimization drilling, process was studied experimentally as function electrolyte concentration, supply voltage time. The optimum from DC25V to DC30V applied voltage, 35 wt% NaOH solution.