FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4249683313> ?p ?o ?g. }

• W4249683313 endingPage "540" @default.
• W4249683313 startingPage "540" @default.
• W4249683313 abstract "Researchers in Korea have developed a silver-loaded zinc oxide nanostructure that can significantly more reduce the operating temperature of acetylene gas sensors. This could mean cheaper, more efficient and more reliable sensors to ensure safety in the handling of this commonly used and highly unstable industrial gas. As well as being used in welding, acetylene is used as a raw material in the production of many products, including acetaldehyde, synthetic rubber, paints, fabrics, floor coverings, dry-cleaning solvents and insecticides. Acetylene is colourless and highly flammable, making it potentially very dangerous, especially as it is used in industrial settings where possible ignition sources can be plentiful. It is a particularly unstable substance when liquefied, pressurised, heated or mixed with air; all of which can also be expected in industrial use. With flame temperatures exceeding 3300°C, it is critical to avoid unexpected ignition of acetylene, and that requires the ability to sense tiny amounts. Numerous sensor approaches have been tried, but they usually operate at high temperatures (over 300°C). This incurs high power consumption and compromises their long-term stability. Their application has also been limited by issues including low sensitivity, poor selectivity and complex sensing material synthesis. In their Electronics Letters paper, the team from the University of Ulsan, South Korea, propose a nanostructure as the basis for efficient low-temperature acetylene sensors. The silver-loaded hierarchical zinc oxide nanostructure sensing material is synthesised uniformly through simple and rapid hydrothermal and photochemical processes. According to the team, the main challenges in this work were controlling the shape of the ZnO nanostructures and the size of the silver nanoparticles. They found that the pH level and working pressure were critical to shaping the ZnO nanostructure and that reaction time under UV light and operating power controlled the nucleation and growth of silver nanoparticles. The material produced has large specific surface area and numerous pores of the hierarchical ZnO nanostructure, and this, combined with the specific catalytic property of silver nanoparticles, is key to the success of the work. “It has high selectivity and long-term stability properties. Along with fast response, our fabricated sensor also exhibits excellent reproducibility, which is very important for the development of high performance practical sensors,” said Ulsan team member, Iftekhar Uddin. The sensor produced is highly selective for acetylene. For comparison, the team measured the responses of zinc oxide structures not loaded with silver to a range of gases (C2H2, H2, CO, CO2 and NO2) and found that the structures were most sensitive to hydrogen. The silver loaded structures, on the other hand, show negligible response to all these gases, apart from acetylene (C2H2). The current version of the sensor has an optimum operating temperature of 200°C, 100°C lower than the previous nanostructure-based approaches using zinc oxide loaded with other chemicals (Pt, Pd, Sm2O3, Ni). Although this is a significant improvement, the Ulsan team are working to get the optimum operating temperature down to 50-100°C. As part of this, they are now focusing on graphene nanosheets to support the silver loaded hierarchical zinc oxide nanostructure. It has been shown previously that embedding this kind of sensor in graphene helps to reduce working temperature." @default.
• W4249683313 created "2022-05-12" @default.
• W4249683313 date "2015-04-01" @default.
• W4249683313 modified "2023-09-27" @default.
• W4249683313 title "silver linings" @default.
• W4249683313 doi "https://doi.org/10.1049/el.2015.0836" @default.
• W4249683313 hasPublicationYear "2015" @default.
• W4249683313 type Work @default.
• W4249683313 citedByCount "0" @default.
• W4249683313 crossrefType "journal-article" @default.
• W4249683313 hasBestOaLocation W42496833131 @default.
• W4249683313 hasConcept C127413603 @default.
• W4249683313 hasConcept C154238967 @default.
• W4249683313 hasConcept C171250308 @default.
• W4249683313 hasConcept C178790620 @default.
• W4249683313 hasConcept C185592680 @default.
• W4249683313 hasConcept C186187911 @default.
• W4249683313 hasConcept C191897082 @default.
• W4249683313 hasConcept C192562407 @default.
• W4249683313 hasConcept C206139338 @default.
• W4249683313 hasConcept C21880701 @default.
• W4249683313 hasConcept C2777517455 @default.
• W4249683313 hasConcept C2779851234 @default.
• W4249683313 hasConcept C31892906 @default.
• W4249683313 hasConcept C42360764 @default.
• W4249683313 hasConcept C548081761 @default.
• W4249683313 hasConceptScore W4249683313C127413603 @default.
• W4249683313 hasConceptScore W4249683313C154238967 @default.
• W4249683313 hasConceptScore W4249683313C171250308 @default.
• W4249683313 hasConceptScore W4249683313C178790620 @default.
• W4249683313 hasConceptScore W4249683313C185592680 @default.
• W4249683313 hasConceptScore W4249683313C186187911 @default.
• W4249683313 hasConceptScore W4249683313C191897082 @default.
• W4249683313 hasConceptScore W4249683313C192562407 @default.
• W4249683313 hasConceptScore W4249683313C206139338 @default.
• W4249683313 hasConceptScore W4249683313C21880701 @default.
• W4249683313 hasConceptScore W4249683313C2777517455 @default.
• W4249683313 hasConceptScore W4249683313C2779851234 @default.
• W4249683313 hasConceptScore W4249683313C31892906 @default.
• W4249683313 hasConceptScore W4249683313C42360764 @default.
• W4249683313 hasConceptScore W4249683313C548081761 @default.
• W4249683313 hasIssue "7" @default.
• W4249683313 hasLocation W42496833131 @default.
• W4249683313 hasOpenAccess W4249683313 @default.
• W4249683313 hasPrimaryLocation W42496833131 @default.
• W4249683313 hasRelatedWork W1978209546 @default.
• W4249683313 hasRelatedWork W1995907093 @default.
• W4249683313 hasRelatedWork W2037822878 @default.
• W4249683313 hasRelatedWork W2078685040 @default.
• W4249683313 hasRelatedWork W2259757938 @default.
• W4249683313 hasRelatedWork W2374957268 @default.
• W4249683313 hasRelatedWork W2377437087 @default.
• W4249683313 hasRelatedWork W2380029783 @default.
• W4249683313 hasRelatedWork W2384511065 @default.
• W4249683313 hasRelatedWork W4200104911 @default.
• W4249683313 hasVolume "51" @default.
• W4249683313 isParatext "false" @default.
• W4249683313 isRetracted "false" @default.
• W4249683313 workType "article" @default.