Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7141845 | Sensors and Actuators B: Chemical | 2018 | 26 Pages |
Abstract
Three-dimensional (3D) distribution Au-nanoparticles (AuNPs) arrays have enabled surface-enhanced Raman scattering (SERS) for a variety of analytical applications due to the spatial-distribution plasmon. Herein, we present a new route for synthesis of 3D SERS powder, hierarchical MoS2-microspheres (MoS2-MS) decorated with “cauliflower-like” AuNPs arrays (CF-AuNPs), for high-efficiency molecular detection. Finite element simulations have shown that the spatial-distribution nanogaps can generate intensive SERS hot spots. Using the CF-AuNPs@MoS2-MS for in-situ molecular detection, not only have 10â14Â M rhodamine 6G or methylene blue been identified with different laser wavelength excitation (532 and 633Â nm), but also various metabolites in human early-morning urine were recognized. Moreover, the wafer-scale flexible SERS substrates consisted of CF-AuNPs@MoS2-MS inset cellulose acetate membrane (CAM) were fabricated via suction filtration method, showing good SERS sensitivity for adenosine detection.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Hengwei Qiu, Minqiang Wang, Le Li, Junjie Li, Zhi Yang, Minghui Cao,