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Updated: Jul 25, 2025
Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
Improvement in near-infrared absorbance attenuation by using nanometer black silicon composited with gold
Guanyu Mi1, Jian Lv2, Longcheng Que1
1State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Abstract:
In order to solve the problem of near-infrared (NIR) absorbance attenuation of silicon, a method of preparing gold nanoparticles (AuNPs) on the micro-nano-structured black silicon (B-Si) is proposed. In this study, the local surface plasmon resonance (LSPR) of AuNPs excited by a light field is used to achieve B-Si materials with broad spectrum and high absorption. The results show that nanometer B-Si composited with 25-nm AuNPs has an average absorption of 98.6% in the spectral range of 400-1100 nm and 97.8% in the spectral range of 1100-2500 nm. Compared with ordinary B-Si, the absorption spectrum is broadened from 400-1100 nm to 400-2500 nm, and the absorption is increased from 90.1 to 97.8% at 1100-2500 nm. It is possible to use the B-Si materials in the field of NIR-enhanced photoelectric detection and micro-optical night vision imaging due to the low cost, high compatibility, and reliability.
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