Journal
BIOSENSORS & BIOELECTRONICS
Volume 212, Issue -, Pages -Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2022.114430
Keywords
Helical gold nanoparticles; Flower-like gold nanoparticles; Chiral nanostructure; Surface-enhanced Raman scattering; Thiram detection
Categories
Funding
- Talent Start-up Funding of Wenzhou Medical University [89219009]
- Natural Science Foundation of Zhejiang Province [LQ20H180005]
- National Natural Science Foundation of China [31471146, 21805188]
- Zhejiang Wenzhou Medical University Scientific Devel-opment Foundation of China [QTJ06012]
- Na-tional Natural Science Foundation of China [21805188]
Ask authors/readers for more resources
This study proposed a SERS substrate made of helical gold nanoparticles synthesized by L-glutathione, showing an impressive average enhancement factor under off-resonant condition. The research also demonstrated the potential application of this SERS substrate in detecting pesticide residues on the surface of fruits.
Surface-enhanced Raman scattering (SERS) technique has enlarged the application of Raman spectroscopy, and the most crucial problem is the exploration of SERS-active materials. In the paper, a SERS substrate made of helical gold nanoparticles by the directed synthesis of L-glutathione (L-GSH) was proposed. Because of the large surface specific area and the uneven conduction electrons distribution for sharp tips resulted from the complex concave surface and the symmetry breaking structure, The nanostructure has shown an impressive average enhancement factor (EF) of 2.95 x 10(5) under off-resonant condition. This phenomenon was explained by the experimental results and finite difference time domain (FDTD) method. Finally, the SERS substrates were used to detect thiram on pear with a limit of detection (LOD) of 0.62 mg/kg and R-2 of 0.9772. The proposed SERS substrates suggest the potential application of chiral molecules such as amino acids, peptides et al. in the SERS-active materials fabrication.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available