journal article·2021-09Open access

Size‐Tunable Gold Aerogels: A Durable and Misfocus‐Tolerant 3D Substrate for Multiplex SERS Detection

Lin Zhou, Yunyi Peng, Na Zhang, Ran Du, René Hübner, Xinglin Wen, Dehui Li, Yue Hu, Alexander Eychmüller

Advanced Optical Materials· Volume 9· Issue 17

Abstract

Abstract The research on surface‐enhanced Raman scattering (SERS) continuously draws wide attention because of its high detection sensitivity. However, the commonly investigated 2D SERS substrates cannot fully utilize the 3D active focal volume and require a tight focus on the correct plane, retarding signal enhancement and flexible use. Here, self‐supported gold aerogels of centimeter‐dimension with tunable ligament sizes are designed as 3D SERS substrates, featuring hot spots throughout the entire network. Unveiling a universal ligament‐size‐effect, the optimized gold aerogel showcases much larger enhancement factors compared to a 8 nm Au film toward dyes, pesticides, and carcinogens (up to 109). Aside from an excellent reusability and an exceptional stability (> 1 month), an outstanding misfocus tolerance (>300 µm along the z‐axis) is also demonstrated for such aerogel‐based SERS substrates for multiplex detection. This work may expand the application scope of metal aerogels and lay the foundation for designing next‐generation 3D SERS substrates.
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Research context

OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Nanocluster Synthesis and Applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials Engineering Wenzhou University Wenzhou 325000 P. R. China

School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China

School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

Department of Physics The Pennsylvania State University University Park Pennsylvania 16802 USA

Physical Chemistry Technische Universität Dresden Zellescher Weg 19 01069 Dresden Germany

Helmholtz‐Zentrum Dresden‐Rossendorf Institute of Ion Beam Physics and Materials Research Bautzner Landstrasse 400 01328 Dresden Germany

Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province

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