TY - JOUR
T1 - Size-Tunable Gold Aerogels
T2 - A Durable and Misfocus-Tolerant 3D Substrate for Multiplex SERS Detection
AU - Zhou, Lin
AU - Peng, Yunyi
AU - Zhang, Na
AU - Du, Ran
AU - Hübner, René
AU - Wen, Xinglin
AU - Li, Dehui
AU - Hu, Yue
AU - Eychmüller, Alexander
N1 - Publisher Copyright:
© 2021 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH
PY - 2021/9/6
Y1 - 2021/9/6
N2 - 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.
AB - 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.
KW - 3D SERS substrate
KW - gold aerogel
KW - metal aerogels
KW - misfocus tolerance
KW - multiplex detection
KW - surface-enhanced Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=85107331527&partnerID=8YFLogxK
U2 - 10.1002/adom.202100352
DO - 10.1002/adom.202100352
M3 - Article
AN - SCOPUS:85107331527
SN - 2195-1071
VL - 9
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 17
M1 - 2100352
ER -
