Dopant-mediated surface charge imbalance for enhancing the performance of metal oxide chemiresistive gas sensors

Chakraborty, Nirman; Mondal, Swastik

doi:10.1039/d1tc05144j

Cited by 19 publications

(15 citation statements)

References 78 publications

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“…This observation put the Au‐50‐15 material in the third quadrant of the surface charge imbalance‐sensing property correlation picture by Chakraborty and Mondal. [ 138 ] This indicates that Au‐50‐15 should be highly responsive toward oxidizing gas due to excess negative surface charge, corroborating by the experimental findings. The results in Figure 9e indicate that better NO 2 response has been observed in the substrate with higher gold layer thickness, which shows a direct correlation between film thickness and sensing response.…”

Section: Resultssupporting

confidence: 76%

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Gangareddy,

Rudra,

Chirumamilla

et al. 2023

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Metal nanoparticles (MNPs) are synthesized using various techniques on diverse substrates that significantly impact their properties. However, among the substrate materials investigated, the major challenge is the stability of MNPs due to their poor adhesion to the substrate. Herein, it is demonstrated how a newly developed H‐glass can concurrently stabilize plasmonic gold nanoislands (GNIs) and offer multifunctional applications. The GNIs on the H‐glass are synthesized using a simple yet, robust thermal dewetting process. The H‐glass embedded with GNIs demonstrates versatility in its applications, such as i) acting as a room temperature chemiresistive gas sensor (70% response for NO2 gas); ii) serving as substrates for surface‐enhanced Raman spectroscopy for the identifications of Nile blue (dye) and picric acid (explosive) analytes down to nanomolar concentrations with enhancement factors of 4.8 × 106 and 6.1 × 105, respectively; and iii) functioning as a nonlinear optical saturable absorber with a saturation intensity of 18.36 × 1015 W m−2 at 600 nm, and the performance characteristics are on par with those of materials reported in the existing literature. This work establishes a facile strategy to develop advanced materials by depositing metal nanoislands on glass for various functional applications.

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Section: Resultssupporting

confidence: 76%

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Gangareddy,

Rudra,

Chirumamilla

et al. 2023

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“…[72][73][74] Surface reactions also have an effect on the responsiveness of gas sensors based on resistance. [75][76][77] When gas molecules are adsorbed, they may react with the active sites on the surface of the material, which can then change the charge distribution on the surface. The significance of such reactions lies in their ability to selectively target specific gases.…”

Section: Sensitive Mechanisms Of Resistive Gas Sensorsmentioning

confidence: 99%

Metal–organic framework-derived metal oxides for resistive gas sensing: a review

Wang,

Song,

2023

Phys. Chem. Chem. Phys.

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“…Photocatalysts have lately acquired prominence as a research topic due to their wide variety of applications in fuel cells, harvesting energy, hydrogen production, , degrading organic pollutants into simple inorganic substances (CO 2 and H 2 O) with light irradiation, − and hence in waste water treatment. , Surface structure and morphology play an important role in photocatalysis − alike some important surface-dependent properties (e.g., sensors, actuators, etc. − ) of materials. Tuning of surface morphology by varying the pH of photocatalytic materials with semiconductor properties in order to observe the impact of light absorption ability is of particular relevance .…”

Section: Introductionmentioning

confidence: 99%

Zn₃Sb₄O₆F₆ and KI-Doped Zn₃Sb₄O₆F₆: A Metal Oxyfluoride System for Photocatalytic Activity, Knoevenagel Condensation, and Bacterial Disinfection

et al. 2023

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Zn3Sb4O6F6 crystallites were synthesized by a pH-regulated hydrothermal synthetic approach, while doping on Zn3Sb4O6F6 by KI was performed by the “incipient wetness impregnation technique.” The effect of KI in Zn3Sb4O6F6 is found with the changes in morphology in the doped compound, i.e., needle-shaped particles with respect to the irregular cuboid and granular shaped in the pure compound. Closer inspection of the powder diffraction pattern of doped compounds also reveals the shifting of Braggs’ peaks toward a lower angle and the difference in cell parameters compared to the pure compound. Both metal oxyfluoride comprising lone pair elements and their doped compounds have been successfully applied as photocatalysts for methylene blue dye degradation. Knoevenagel condensation reactions were performed using Zn3Sb4O6F6 as the catalyst and confirmed 99% yield even at 60 °C temperature under solvent-free conditions. Both pure and KI-doped compounds were tested against several standard bacterial strains, i.e., Enterobacter sp., Escherichia coli, Staphylococcus sp., Salmonella sp., Bacillus sp., Proteous sp., Pseudomonas sp., and Klebsiella sp. by the “disk diffusion method” and their antimicrobial activities were confirmed.

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Dopant-mediated surface charge imbalance for enhancing the performance of metal oxide chemiresistive gas sensors

Abstract: Chemically pristine and untailored metal oxide based gas sensors usually suffer the brunt of poor sensitivity and selectivity. Doping with suitable element has been an efficient strategy to encounter above...

Cited by 19 publications

References 78 publications

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Metal–organic framework-derived metal oxides for resistive gas sensing: a review

Zn₃Sb₄O₆F₆ and KI-Doped Zn₃Sb₄O₆F₆: A Metal Oxyfluoride System for Photocatalytic Activity, Knoevenagel Condensation, and Bacterial Disinfection

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Dopant-mediated surface charge imbalance for enhancing the performance of metal oxide chemiresistive gas sensors

Abstract: Chemically pristine and untailored metal oxide based gas sensors usually suffer the brunt of poor sensitivity and selectivity. Doping with suitable element has been an efficient strategy to encounter above...

Cited by 19 publications

References 78 publications

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Multi‐Functional Applications of H‐Glass Embedded with Stable Plasmonic Gold Nanoislands

Metal–organic framework-derived metal oxides for resistive gas sensing: a review

Zn3Sb4O6F6 and KI-Doped Zn3Sb4O6F6: A Metal Oxyfluoride System for Photocatalytic Activity, Knoevenagel Condensation, and Bacterial Disinfection

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Zn₃Sb₄O₆F₆ and KI-Doped Zn₃Sb₄O₆F₆: A Metal Oxyfluoride System for Photocatalytic Activity, Knoevenagel Condensation, and Bacterial Disinfection