CdS based Chemiresistor with Schottky Contact: Toxic Gases Detection with Enhanced Sensitivity and Selectivity at Room Temperature

2022 ◽  
pp. 131421
Author(s):  
Venkata Ramesh Naganaboina ◽  
Shiv Govind Singh
Keyword(s):  
Room Temperature ◽  
Schottky Contact ◽  
Enhanced Sensitivity ◽  
Toxic Gases ◽  
Sensitivity And Selectivity

Porous conducting polymer and reduced graphene oxide nanocomposites for room temperature gas detection

RSC Advances ◽  
2014 ◽  
Vol 4 (80) ◽  
pp. 42546-42553 ◽  
Author(s):  
Yajie Yang ◽  
Xiaojie Yang ◽  
Wenyao Yang ◽  
Shibin Li ◽  
Jianhua Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Conducting Polymer ◽  
Room Temperature ◽  
Gas Detection ◽  
Enhanced Sensitivity ◽  
Reduced Graphene ◽  
Sensitivity And Selectivity

Porous conducting polymer and reduced graphene oxide (GO) composites was prepared as sensing materials for enhanced sensitivity and selectivity.

Fabrication of anatase/rutile hierarchical nanospheres with enhanced n/p type gas sensing performance at room temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57722-57726 ◽  
Author(s):  
Shaofeng Shao ◽  
Shimin Wang ◽  
Fan Jiang ◽  
Hongyan Wu ◽  
Tao Wu ◽  
...  
Keyword(s):  
Surface Area ◽  
Room Temperature ◽  
Gas Sensing ◽  
Large Surface Area ◽  
High Crystallinity ◽  
Enhanced Sensitivity ◽  
Sensitivity And Selectivity ◽  
P Type ◽  
Sensing Performance

Porous Pt decorated anatase/rutile sensing nanospheres with high crystallinity and large surface area synthesized through psHT treatment present enhanced sensitivity and selectivity to VOCs vapor at room temperature.

L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

2021 ◽  
Author(s):  
Md. Farhan Naseh ◽  
Neelam Singh ◽  
Jamilur R. Ansari ◽  
Ashavani Kumar ◽  
Tapan Sarkar ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Quantum Dots ◽  
Room Temperature ◽  
Graphene Quantum Dots ◽  
Optical Characterization ◽  
Functionalized Graphene ◽  
Transmission Electron ◽  
Sensitivity And Selectivity ◽  
Structural Characterizations

Abstract Here, we report functionalized graphene quantum dots (GQDs) for the optical detection of arsenic at room temperature. GQDs with the fluorescence of three fundamental colors (red, green, and blue) were synthesized and functionally capped with L-cysteine (L-cys) to impart selectively towards As (III) by exploiting the affinity of L-cys towards arsenite. The optical characterization of GQDs was carried out using UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy, and fluorescence spectrometry and the structural characterizations were performed using transmission electron microscopy. The fluorescence results showed instantaneous quenching in intensity when the GQDs came in contact with As (III) for all test concentrations over a range from 0.025 ppb to 25 ppb, which covers the permissible limit of arsenic in drinking water. The experimental results suggested excellent sensitivity and selectivity towards As (III).

Enhanced Sensitivity and Selectivity of Co3O4 Nanoparticle-Decorated SnO2 Nanowire Sensors to Ethanol Gas

2017 ◽  
Vol 17 (11) ◽  
pp. 8285-8290 ◽  
Author(s):  
Maryam Bonyani ◽  
Gun-Joo Sun ◽  
Jae Kyung Lee ◽  
Seungbok Choi ◽  
Chongmu Lee ◽  
...  
Keyword(s):  
Enhanced Sensitivity ◽  
Sensitivity And Selectivity ◽  
Nanowire Sensors

A miniature room temperature formaldehyde sensor with high sensitivity and selectivity using CdSO4 modified ZnO nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75098-75104 ◽  
Author(s):  
Xinghua Chang ◽  
Mi Peng ◽  
Junfeng Yang ◽  
Teng Wang ◽  
Yu liu ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Room Temperature ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Modified Zno Nanoparticles

A light activated miniature formaldehyde sensor working at room temperature is fabricated by CdSO4 modified ZnO nanoparticles.

scholarly journals Production and Electrical Properties of a CuZnAlMn(SMA)/p-Si Diode

2021 ◽  
Author(s):  
EMINE ALDIRMAZ ◽  
M. Güler ◽  
E. Güler
Keyword(s):  
Room Temperature ◽  
Schottky Contact ◽  
Phase Identification ◽  
Frequency Interval ◽  
Electrical Measurements ◽  
X Ray ◽  
Current Voltage ◽  
Capacitance Voltage ◽  
Type Semiconductor ◽  
Diode Current

Abstract In this study, the Cu-23.37%Zn-13.73%Al-2.92%Mn (at.%) alloy was used. Phase identification was performed with the Scanning electron microscope (SEM), and energy-dispersive X-ray (EDX). We observed in the austenite phase in Cu-23.37%Zn-13.73%Al-2.92%Mn (at.%) alloy. To produce a new Schottky diode, CuZnAlMn alloy was exploited as a Schottky contact on p-type semiconductor silicon substrate. To calculate the characteristics of the produced diode, current-voltage (I-V), capacitance-voltage (C-V) and conductance-voltage (G-V) analyzes were taken at room temperature (300 K), in the dark and under various lights. Using electrical measurements, the diode's ideality factor (n), barrier height (Φb), and other diode parameters were calculated. Besides, the conductance / capacitance-voltage (G/C-V) characteristics of the diode were studied and in a wide frequency interval at room temperature. Also, the capacitance and conductance values strongly ​​ rely on the frequency. From the present experimental results, the obtained diode can be used for optoelectronic devices.

Mesoporous InN/In2O3heterojunction with improved sensitivity and selectivity for room temperature NO2gas sensing

2016 ◽  
Vol 27 (38) ◽  
pp. 385501 ◽  
Author(s):  
Fengdong Qu ◽  
Honghong Liu ◽  
Rohiverth Guarecuco ◽  
Yutong Jiao ◽  
Minghui Yang
Keyword(s):  
Room Temperature ◽  
Sensitivity And Selectivity

Fabrication of TiO2 sensor using rapid breakdown anodization method to measure pressure, humidity and sense gases at room temperature

2019 ◽  
pp. 1694-1703
Author(s):  
Reem Saadi Khaleel ◽  
Mustafa Shakir Hashim
Keyword(s):  
Room Temperature ◽  
Average Pressure ◽  
Spherical Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Recovery Times ◽  
Sensitivity And Selectivity ◽  
Response And Recovery ◽  
Anodization Method ◽  
Rapid Breakdown Anodization

Rapid breakdown anodization (RBA) process was used to fabricate TiO2 sensor to measure pressure and humidity and sense gases at room temperature. This chemical process transformed Ti to its oxide (TiO2) as a powder with amorphous phase as X ray diffraction (XRD) technique confirmed.  This oxide consisted from semi spherical nanoparticles and titania nanotubes (TNTs) as Scanning electron microscope (SEM) technique showed.  TiO2 powder was deposited on Ti substrates by using electrophoretic deposition (EPD) method.   Average pressure sensitivity was 0.34 MΩ/bar and hysteresis area was 1.4 MΩ .bar. Resistance of TiO2 decreased exponentially with the increasing of relative humidity (RH%). The sensitivity% of TiO2 for RH% was greater than 70% in the range of (50-95). TiO2 was tested as a sensor for Ammonia, Ethanol and Methanol. Its sensitivity and selectivity towards Ammonia were the greatest but the shortest response and recovery times were recorded toward Methanol.

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