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One dimensional Au-ZnO hybrid nanostructures based CO2 detection : Growth mechanism and role of the seed layer on sensing performance

Gonzalez-Garnica, Marisol (author)
Univ Tecnol Tulancingo, Tulancingo 43642, Hidalgo, Mexico.;Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
Galdamez-Martinez, Andres (author)
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
Malagon, Francisco (author)
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
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Ramos, C. D. (author)
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
Santana, G. (author)
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
Abolhassani, Reza (author)
Univ Southern Denmark, Mads Clausen Inst, NanoSYD, Alsion 2, DK-6400 Sonderborg, Denmark.
Panda, Pritam Kumar, PhD Student, 1991- (author)
Uppsala universitet,Materialteori
Kaushik, Ajeet (author)
Florida Polytech Univ, Dept Nat Sci, Div Sci Art & Math, 4700 Res Way, Lakeland, FL 33805 USA.
Mishra, Yogendra Kumar (author)
Univ Southern Denmark, Mads Clausen Inst, NanoSYD, Alsion 2, DK-6400 Sonderborg, Denmark.
Karthik, Tangirala V. K. (author)
Autonomous Univ Hidalgo State, Tepeji Grad Sch, Ind Engn, Ave Maestro 41,Col Noxtongo 2a Secc, Tepeji Del Rio 42855, Hidalgo, Mexico.
Dutt, A. (author)
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico.
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Univ Tecnol Tulancingo, Tulancingo 43642, Hidalgo, Mexico;Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico. Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico. (creator_code:org_t)
Elsevier, 2021
2021
English.
In: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 337
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • In the present research, hybrid Au-ZnO one-dimensional (1-D) nanostructures were grown on silicon substrates with an Al-doped ZnO (AZO) seed layer (Ultrasonic Spray Pyrolysis: USP grown) and no seed layer (NSL) using two different catalytic gold films of 2 nm and 4 nm, respectively. Consequently, such 1-D nanostructures growth was associated with the vapor-liquid-solid (VLS) and vapor-solid (VS) processes. Scanning electron microscopy (SEM) imaging analysis confirms that heat treatment triggered Au nanoparticles nucleation with varying diameters. The Au nanoparticles size and underneath seed layer texture strongly affect the morphology and aspect ratio of 1-D ZnO nanostructures. The seed layer (1-D USP) sample resulted in the growth of longer nanowires (NWs) with a high aspect ratio. The NSL sample showed the formation of nanorods (NRs) with a low aspect ratio mainly via VS growth process. X-ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS), and photoluminescence (PL) analysis also revealed the differences in the NWs and NRs properties and confirmed VLS and VS growth mechanisms. CO2 gas sensing performance at different concentrations was demonstrated, and NWs with seed layer showed a relatively higher sensing response. In contrast, NSL samples (NRs) exhibited two times faster response. A detailed gas sensing mechanism with different CO2 adsorption modes based on properties of 1D nanostructures has been discussed. Currently, CO2 sensing and capturing are critical topics in the green transition framework. The present work would be of high significance to the scientific field of NW growth and fulfill the urgent need for CO2 gas sensing.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

Keyword

ZnO/Au nanowires
Metal oxide semiconductor
Seed layers
VLS/VS growth mechanism
Ultrasonic spray pyrolysis
CO2 gas sensors
Environmental monitoring
Sustainable systems

Publication and Content Type

ref (subject category)
art (subject category)

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