Remarkable reproducibility and significant sensitivity of ZnO nanoparticles covered by Chromium (III) oxide as a hydrogen sulfide gas sensor

Najafi, Vahid; Zolghadr, S.; Kimiagar, Salimeh

doi:10.1016/j.ijleo.2019.01.015

Cited by 22 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reproducibility is one of the most significant parameters of sensor response, which is strongly related to sensor reliability and consistency ( Najafi et al., 2019 ). It could be indexed by the coefficient of vibration ( CV ) using the following equations ( Chen et al., 2020 ):

…”

Section: Resultsmentioning

confidence: 99%

Self-assembled peptides-modified flexible field-effect transistors for tyrosinase detection

Ren

Liang

et al. 2022

iScience

View full text Add to dashboard Cite

Summary Flexible biosensors have received intensive attention for real-time, non-invasive monitoring of cancer biomarkers. Highly sensitive tyrosinase biosensors, which are important for melanoma screening, remained a hurdle. Herein, high-performance tyrosinase-sensing field-effect transistor-based biosensors (bio-FETs) have been successfully achieved by self-assembling nanostructured tetrapeptide tryptophan–valine–phenylalanine–tyrosine (WVFY) on n-type metal oxide transistors. In the presence of target tyrosinase, the phenolic hydroxyl groups in WVFY are rapidly converted to benzoquinone with the consumption of protons, which could be detected potentiometrically by bio-FETs. As a result, the WVFY-modified bio-FETs exhibited an ultra-low detection limit of 1.9 fM and an optimal detection range of 10 fM to 1 nM toward tyrosinase sensing. Furthermore, flexible devices fabricated on ∼2.9-μm-thick polyimide (PI) substrates illustrated robust mechanical flexibility, which could be attached to human skin conformally. These achievements hold promise for wearable melanoma screening and provide designing guidelines for detecting other important cancer biomarkers with bio-FETs.

show abstract

…”

Section: Resultsmentioning

confidence: 99%

Self-assembled peptides-modified flexible field-effect transistors for tyrosinase detection

Ren

Liang

et al. 2022

iScience

View full text Add to dashboard Cite

show abstract

“…The adsorbed oxygen species capture electrons from the conduction band, creating a depletion region in the samples. The electron transfer from the conduction band to the adsorbed oxygen species, decreasing the electron concentration of the surface [26]. After that, when the surface is exposed to NO gas, they react with the chemisorbed oxygen.…”

Section: Resultsmentioning

confidence: 99%

Low Concentration NO Gas Detection Of SnO2 And Zn0.50Sn0.50O Sensors

Çorlu

Yıldırım

et al. 2020

Politeknik Dergisi

View full text Add to dashboard Cite

Figure. SEM Analysis (Zn0.50Sn0.50O) Aim In this study, the gas sensing properties of SnO2 and Zn0.50Sn0.50O samples produced by Succession Ionic Layer Adsorption and Reaction (SILAR) method with different SILAR cycles against NO gas were investigated. Design & Methodology In this study, sensors were produced with the cheap, practical and fabricated Succession Ionic Layer Adsorption and Reaction (SILAR) method. Originality The sensors can be seen to show high responses to a relatively low NO gas concentration, such as 50 ppb. Findings For 50 ppb NO gas concentration, 3.01, 3.74% and 4.16% sensitivities were obtained for 20, 30 and 40 cycles, respectively, while for 25 ppm 18%, 20% and 34% sensitivities were obtained, respectively. Conclusion The results show that Zn doping greatly increases the response sensors. Also, Zn doping introduces some defects in the sensors, and these defects make the structure unstable and more possible to react with gas molecules.

show abstract

“…It occurs naturally as n-type and stable chemically as well as thermally. ZnO possesses high mobility, optically transparent in the visible region, and is one of the finest sensors for an extensive range of both reducing and oxidizing gases and the ease of preparation and availability in abundance makes it a suitable contender [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of spray pyrolysed In:ZnO nanostructures for CO gas sensing at low concentration

Ani

Poornesh

Nagaraja

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Herein, we report the role of indium (In) on the carbon monoxide sensing of ZnO thin films using a low-cost spray pyrolysis technique. The decrease in crystalline size was observed from XRD studies and hexagonal wurtzite structure was confirmed. Photoluminescence and XPS studies proved the presence of various defects in the films. The gas-sensing properties of films toward carbon monoxide (CO) gas indicate that 15 wt% of In in ZnO thin films (IZO) exhibit high response (1.84) to a low concentration of the gas (1 ppm) at 300 °C compared to undoped ZnO (0.53). The observed high response of 15 wt% IZO can be mainly endorsed to the oxygen vacancy defects as observed from the photoluminescence and XPS analysis. Further, the high response is complemented by high surface area and smaller grain size (~ 13.1 nm) with well-defined grain boundaries as evident from SEM analysis as well as XRD studies.

show abstract

Remarkable reproducibility and significant sensitivity of ZnO nanoparticles covered by Chromium (III) oxide as a hydrogen sulfide gas sensor

Cited by 22 publications

References 39 publications

Self-assembled peptides-modified flexible field-effect transistors for tyrosinase detection

Self-assembled peptides-modified flexible field-effect transistors for tyrosinase detection

Low Concentration NO Gas Detection Of SnO2 And Zn0.50Sn0.50O Sensors

Evaluation of spray pyrolysed In:ZnO nanostructures for CO gas sensing at low concentration

Contact Info

Product

Resources

About