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Article

Polarized SERS Controlled by Anisotropic Growth on Ordered Curvature Substrate

1
Center for Advanced Optoelectronic Materials, School of Material and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2
College of Chemistry, Nankai University, Tianjin 300071, China
3
College of Physics, Jilin Normal University, Changchun 130103, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Jianjun Wei and Franck Rabilloud
Molecules 2021, 26(8), 2338; https://doi.org/10.3390/molecules26082338
Received: 4 February 2021 / Revised: 7 March 2021 / Accepted: 15 April 2021 / Published: 17 April 2021
(This article belongs to the Section Green Chemistry)
Colloidal lithography is an efficient and low-cost method to prepare an ordered nanostructure array with new shapes and properties. In this study, square-shaped and cone-shaped Au nanostructures were obtained by 70° angle deposition onto polystyrene bead array with the diameter of 500 nm when a space of 120 nm is created between the neighbor beads by plasma etching. The gaps between the units decrease when the Au deposition time increases, which leads to the polarized enhanced local field, in agreement with the surface-enhanced Raman scattering spectra (SERS) observations and finite-difference time-domain (FDTD) simulations. When the Au deposition time increased to 5 min, 5 nm gaps form between the neighbor units, which gave an enhancement factor of 5 × 109. The SERS chip was decorated for the detection of the liver cancer cell marker Alpha-fetoprotein (AFP) with the detection limit down to 5 pg/mL. View Full-Text
Keywords: angle deposition; polarization; SERS angle deposition; polarization; SERS
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MDPI and ACS Style

Wang, Y.; Zhu, A.; Zhang, X.; Zhang, Y. Polarized SERS Controlled by Anisotropic Growth on Ordered Curvature Substrate. Molecules 2021, 26, 2338. https://doi.org/10.3390/molecules26082338

AMA Style

Wang Y, Zhu A, Zhang X, Zhang Y. Polarized SERS Controlled by Anisotropic Growth on Ordered Curvature Substrate. Molecules. 2021; 26(8):2338. https://doi.org/10.3390/molecules26082338

Chicago/Turabian Style

Wang, Yaxin, Aonan Zhu, Xiaolong Zhang, and Yongjun Zhang. 2021. "Polarized SERS Controlled by Anisotropic Growth on Ordered Curvature Substrate" Molecules 26, no. 8: 2338. https://doi.org/10.3390/molecules26082338

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