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Nanomaterials 2018, 8(7), 493; https://doi.org/10.3390/nano8070493

Controlling the 3D Electromagnetic Coupling in Co-Sputtered Ag–SiO2 Nanomace Arrays by Lateral Sizes

1
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
2
College of Chemistry, Jilin Normal University, Siping 136000, China
3
College of Physics, Jilin Normal University, Siping 136000, China
*
Authors to whom correspondence should be addressed.
Received: 7 June 2018 / Revised: 28 June 2018 / Accepted: 28 June 2018 / Published: 5 July 2018
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Abstract

Ag–SiO2 nanomace arrays were prepared on a two-dimensional ordered colloidal (2D) polystyrene sphere template by co-sputtering Ag and SiO2 in a magnetron sputtering system. The lateral size of the nanomaces and the distance between the neighbor nanomaces were controlled by adjusting the etching time of the 2D template. The nanomaces were composed of SiO2-isolated Ag nanoparticles, which produced surface-enhanced Raman scattering (SERS) enhancement, and 3D hot spots were created between the neighbor nanomaces. When the distance between the nanomaces was sufficiently large, triangle-shaped nanostructures on silicon substrate were observed, which also contributed to the enhancement of the SERS signals. The finite-difference time-domain (FDTD) method was used to calculate the electromagnetic field distributions in the Ag–SiO2 nanomace arrays, which generated physical reasons for the change of the SERS signals. View Full-Text
Keywords: co-sputtered; nanomace arrays; SERS; FDTD co-sputtered; nanomace arrays; SERS; FDTD
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Zhang, F.; Guo, S.; Liu, Y.; Chen, L.; Wang, Y.; Gao, R.; Zhu, A.; Zhang, X.; Zhang, Y. Controlling the 3D Electromagnetic Coupling in Co-Sputtered Ag–SiO2 Nanomace Arrays by Lateral Sizes. Nanomaterials 2018, 8, 493.

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