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Template-Induced Gr...
Template-Induced Growth of Sputter-Deposited Gold Nanoparticles on Ordered Porous TiO2 Thin Films for Surface-Enhanced Raman Scattering Sensors
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- Liang, Suzhe (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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- Guan, Tianfu (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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- Yin, Shanshan (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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- Krois, Eva (författare)
- Tech Univ Munich, Fak Chem, Inst Wasserchem & Chem Balneol, D-81377 Munich, Germany.
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- Chen, Wei (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;Shenzhen Technol Univ SZTU, Coll Engn Phys, Shenzhen 518118, Peoples R China.
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- Everett, Christopher R. (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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- Drewes, Jonas (författare)
- Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany.
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- Strunskus, Thomas (författare)
- Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany.
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- Gensch, Marc (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;DESY, D-22607 Hamburg, Germany.
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- Rubeck, Jan (författare)
- DESY, D-22607 Hamburg, Germany.
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- Haisch, Christoph (författare)
- Tech Univ Munich, Fak Chem, Inst Wasserchem & Chem Balneol, D-81377 Munich, Germany.
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- Schwartzkopf, Matthias (författare)
- DESY, D-22607 Hamburg, Germany.
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- Faupel, Franz (författare)
- Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany.
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- Roth, Stephan V. (författare)
- KTH,Fiber- och polymerteknologi,DESY, D-22607 Hamburg, Germany.
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- Cheng, Ya-Jun (författare)
- Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China.
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- Mueller-Buschbaum, Peter (författare)
- Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany Tech Univ Munich, Fak Chem, Inst Wasserchem & Chem Balneol, D-81377 Munich, Germany. (creator_code:org_t)
- 2022-05-06
- 2022
- Engelska.
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Ingår i: ACS Applied Nano Materials. - : American Chemical Society (ACS). - 2574-0970. ; 5:5, s. 7492-7501
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Ordered porous gold/titanium dioxide (Au/TiO2) hybrid nanostructured films are specifically interesting in large-scale applications using localized surface plasmon resonances (LSPRs) and surface-enhanced Raman scattering (SERS). Deposition of Au nanoparticles via sputter deposition is one of the promising technologies to establish optically active sites at low cost in combination with nanostructured TiO2 films. In this work, we investigate the optical response of sputter-deposited Au/TiO2 nanohybrid thin films with a focus on the plasmonic response and application as molecular sensors. The LSPR peak red shifts with an increasing thickness of deposited Au. The Raman intensity of deposited molecules, probed with rhodamine 6G (R6G), depends on the deposited gold thickness. It has its maximum at an effective Au thickness of 3.4 nm. To elucidate the origin of this behavior, we apply in situ grazing-incidence small-angle X-ray scattering (GISAXS) to investigate the growth kinetics of Au on a TiO2 template during sputter deposition. On the basis of time-resolved GISAXS, the growth characteristics of sputter-deposited Au on a TiO2 template with a final effective Au layer thickness around the percolation threshold is described with the well-known four-stage model of nucleation and cluster formation, diffusion-mediated growth, adsorption-mediated growth, and grain growth. The maximum in SERS intensity is corroborated by the existence and optimal size of hot spots in the narrow space occurring between the sputter-deposited Au clusters, on staying below the percolation threshold. On the basis of the growth laws extracted, we give a guideline for tailoring the ordered porous Au/TiO2 nanohybrid thin films for SERS sensor applications.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Au/TiO2 nanohybrid thin film
- sensor
- sputter deposition
- in situ GISAXS
- growth kinetics
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Liang, Suzhe
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Guan, Tianfu
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Yin, Shanshan
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Krois, Eva
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Chen, Wei
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Everett, Christo ...
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Drewes, Jonas
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Strunskus, Thoma ...
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Gensch, Marc
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Rubeck, Jan
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Haisch, Christop ...
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Schwartzkopf, Ma ...
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Faupel, Franz
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Roth, Stephan V.
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Cheng, Ya-Jun
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Mueller-Buschbau ...
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