Large-scale Multiplexed Surface Plasmonic Gold Nanostructures Based on Nanoimprint and Self-assembly †

doi:10.7503/cjcu20190658

Abstract

Abstract:

Noble metal nanoparticles with significant localized surface plasmon resonance effects have demonstrated potential applications in various fields due to their unique optoelectronic properties. Recently, the construction of multiplexed plasmonic nanostructures has been widely conducted. Through combining nanoimprint and self-assembly, an efficient method for the preparation of multiplexed plasmonic nanostructure with different size gold nanoparticles on a large area were developed. Meanwhile, two fluorescent barcodes were designed based on the differences in the effects of surface enhancement fluorescence, which shows a multi-functional fluorescent display.

Key words: Nanoimprint, Self-assembly, Surface plasmon resonance, Nanoparticle structure, Surface enhanced fluorescence(SEF)

CLC Number:

TrendMD:

LI Dong,SUN Yinghui,WANG Zhongshun,HUANG Jing,Lü Nan,JIANG Lin. Large-scale Multiplexed Surface Plasmonic Gold Nanostructures Based on Nanoimprint and Self-assembly ^†[J]. Chem. J. Chinese Universities, 2020, 41(2): 221.

Figures/Tables 6

Fig.1 Schematic of preparing multiplex plasmonic lattice substrate

Fig.2 SEM images of multiplexed plasmonic substrate (A) 13 nm gold spheres assembled on the SiO2/Si substrate; (B) substrate after imprinting and oxygen plasma treatment; (C) multiplexed plasmonic nanostructures after in-situ growth; (D), (E) and (F) are amplification of (A), (B) and (C), respectively.

Fig.3 SEM section of grown nanoparticles(A) and diameter statistics of grown nanoparticles(B)

Fig.4 Electric field simulation of multiplexed nanostructure(A), experimental(B) and simulated scattering spectra(C) of different regions on multiplexed substrate

Fig.5 Surface enhanced fluorescence schematic of multiplexed substrate to HEX(A) and TEX(B), optical microscope fluorescence image of the multiplexed substrate absorbed HEX(C) and TEX(D), fluorescence spectra of the multiplexed substrate absorbed HEX(E) and TEX(F) a1 and a2 are the ratio of the fluorescence intensity for the two molecules in the growing region and the ungrowing region, respectively.

Fig.6 Emission spectra of the HEX(a) and TEX(b), and the scattering spectrum of the grown nanoparticles(c) and ungrown nanoparticles(d) The dotted lines 1 and 2 are the excitation of HEX and TEX, respectively.

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