Crystallographic investigation of Au nanoparticles embedded in a SrTiO{sub 3} thin film for plasmonics applications by means of synchrotron radiation

Self-organized monocrystalline Au nanoparticles with potential applications in plasmonics are grown in a SrTiO{sub 3} matrix by a novel two-step deposition process. The crystalline preferred orientation of these Au nanoparticles is investigated by synchrotron hard x-ray diffraction. Nanoparticles pr...

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Bibliographic Details
Published in:Journal of applied physics 2015-03, Vol.117 (10)
Main Authors: Pincini, Davide, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milano, Mazzoli, Claudio, Bernhardt, Hendrik, Katzer, Christian, Schmidl, Frank, Uschmann, Ingo, Detlefs, Carsten
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
DEPOSITION
GOLD
GRAIN ORIENTATION
HARD X RADIATION
MATRIX MATERIALS
NANOPARTICLES
STRONTIUM TITANATES
SUBSTRATES
SYNCHROTRON RADIATION
THIN FILMS
X-RAY DIFFRACTION
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Summary:Self-organized monocrystalline Au nanoparticles with potential applications in plasmonics are grown in a SrTiO{sub 3} matrix by a novel two-step deposition process. The crystalline preferred orientation of these Au nanoparticles is investigated by synchrotron hard x-ray diffraction. Nanoparticles preferentially align with the (111) direction along the substrate normal (001), whereas two in-plane orientations are found with [110]{sub SrTiO{sub 3}}∥[110]{sub Au} and [100]{sub SrTiO{sub 3}}∥[110]{sub Au}. Additionally, a smaller diffraction signal from nanoparticles with the (001) direction parallel to the substrate normal (001) is observed; once again, two in-plane orientations are found, with [100]{sub SrTiO{sub 3}}∥[100]{sub Au} and [100]{sub SrTiO{sub 3}}∥[110]{sub Au}. The populations of the two in-plane orientations are found to depend on the thickness of the gold film deposited in the first step of the growth.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4914865