Gold-carbonaceous materials based heterostructures for gas sensing applications

Kumar, Sanjay; Kumar, Sudhir; Sengar, Manisha; Kumari, Pratibha

doi:10.1039/d1ra00361e

Cited by 9 publications

(4 citation statements)

References 211 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sensor resistance increased in the presence of ethanol vapor (a reducing species), which confirms that the CNF behave as p-type semiconductors [46]. In addition, as Figure 6 depicted, Au NP has a minor effect on the conductivity of CNF sensors.…”

Section: Gas Sensing Measurementsmentioning

confidence: 56%

Enhancement of Room Temperature Ethanol Sensing by Optimizing the Density of Vertically Aligned Carbon Nanofibers Decorated with Gold Nanoparticles

et al. 2022

View full text Add to dashboard Cite

An ethanol gas sensor based on carbon nanofibers (CNFs) with various densities and nanoparticle functionalization was investigated. The CNFs were grown by means of a Plasma-Enhanced Chemical Vapor Deposition (PECVD), and the synthesis conditions were varied to obtain different number of fibers per unit area. The devices with a larger density of CNFs lead to higher responses, with a maximal responsivity of 10%. Furthermore, to simultaneously improve the sensitivity and selectivity, CNFs were decorated with gold nanoparticles by an impaction printing method. After metal decoration, the devices showed a response 300% higher than pristine devices toward 5 ppm of ethanol gas. The morphology and structure of the different samples deposited on a silicon substrate were characterized by TEM, EDX, SEM, and Raman spectroscopy, and the results confirmed the presence of CNF decorated with gold. The influence of operating temperature (OT) and humidity were studied on the sensing devices. In the case of decorated samples with a high density of nanofibers, a less-strong cross-sensitivity was observed toward a variation in humidity and temperature.

show abstract

Section: Gas Sensing Measurementsmentioning

confidence: 56%

Enhancement of Room Temperature Ethanol Sensing by Optimizing the Density of Vertically Aligned Carbon Nanofibers Decorated with Gold Nanoparticles

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The common noble metals in resistive gas sensors mainly include Pd, 84 Pt, 85 Ag, 86 Au, 87 etc. When used as the guest materials, these noble metals are generally modified onto host materials to form heterostructural nanoparticles, improving the sensitivity and reducing the working temperature of gas sensors through catalytic and adsorption effects.…”

Section: Functional Guest Materials In Resistive Gas Sensorsmentioning

confidence: 99%

Advances in functional guest materials for resistive gas sensors

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In practice, carbon monoxide detectors are used as sensors for alarming faulty ventilation. The most commonly used materials for the production of gas sensors include polymers, semiconductor metal oxides, or porous silica, and nanomaterials such as single-wall carbon nanotubes, graphene, and silicene [73].…”

Section: Smoke Detectorsmentioning

confidence: 99%

Nanotechnology in Fire Protection—Application and Requirements

et al. 2021

View full text Add to dashboard Cite

Nanotechnology is used, to an increasing extent, in practically every aspect of the economy and society. One area where nanotechnology is constantly advancing is fire protection. Nanostructures are found in elements used in direct protection, such as in protective clothing, filters, and helmets. Solutions in the field of nanotechnology are also used in elements reducing the fire risk and increasing the fire safety, such as building materials and structures, paints, coatings, or fire safety equipment (e.g., fire detectors). However, new solutions may also pose a threat to the safety of people and the environment. As a result of operation or combustion and degradation processes, the emission of nano-substances with toxic properties may occur. Therefore, knowledge in this field is necessary, as it allows for the appropriate targeting and use of nanotechnology.

show abstract

Gold-carbonaceous materials based heterostructures for gas sensing applications

Abstract: The carbon nanostructures such as carbon nanotubes and graphene decorated with gold nanoparticles exhibit promising gas sensing applications with enhanced sensitivity.

Cited by 9 publications

References 211 publications

Enhancement of Room Temperature Ethanol Sensing by Optimizing the Density of Vertically Aligned Carbon Nanofibers Decorated with Gold Nanoparticles

Enhancement of Room Temperature Ethanol Sensing by Optimizing the Density of Vertically Aligned Carbon Nanofibers Decorated with Gold Nanoparticles

Advances in functional guest materials for resistive gas sensors

Nanotechnology in Fire Protection—Application and Requirements

Contact Info

Product

Resources

About