Surface-enhanced Raman scattering enhancement using a hybrid gold nanoparticles@carbon nanodot substrate for herbicide detection
- University of North Carolina, Greensboro, NC (United States)
- Syngenta Crop Protection Inc., Greensboro, NC (United States)
- Savannah River National Laboratory (SRNL), Aiken, SC (United States)
The widespread distribution of herbicides in the environment poses a significant risk to human health and wildlife. Surface-enhanced Raman scattering (SERS) has emerged as a powerful technique for detecting and analyzing herbicides. However, developing a low-cost, highly sensitive, reproducible, stable, and Raman-active nanostructured substrate for herbicide detection remains a particular challenge. In this research, a nanohybrid substrate consisting of gold nanoparticles@carbon nanodots (AuNPs@CNDs) was synthesized by reducing HAuCl4 in the presence of CNDs at 100 °C. The optical, chemical, and physical properties of CNDs, AuNPs, and the hybrid AuNPs@CND substrates were thoroughly investigated using various techniques including UV-vis spectrometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and CytoViva darkfield and hyperspectral imaging. The SERS effect of the substrates was evaluated using rhodamine 6G (Rh6G), a Raman-active probe, and two groups of herbicides containing mesotrione or S-metolachlor. The results demonstrated a significant signal amplification in the SERS spectra of Rh6G and herbicide molecule detection using the AuNPs@CND substrate compared to bare CNDs and AuNPs alone. This suggests that the nanohybrid AuNPs@CND SERS substrate holds promise for the detection of herbicides and other organic compounds in environmental applications.
- Research Organization:
- Savannah River National Laboratory (SRNL), Aiken, SC (United States); University of North Carolina, Greensboro, NC (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Environmental Management (EM)
- Grant/Contract Number:
- 89303321CEM000080
- OSTI ID:
- 2440896
- Report Number(s):
- SRNL--STI-2024-00186
- Journal Information:
- The Analyst, Journal Name: The Analyst Journal Issue: 21 Vol. 149; ISSN 1364-5528; ISSN 0003-2654
- Publisher:
- Royal Society of Chemistry (RSC)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Graphene-based textured surface by pulsed laser deposition as a robust platform for surface enhanced Raman scattering applications
A Reusable Surface-Enhanced Raman Scattering (SERS) Substrate Prepared by Atomic Layer Deposition of Alumina on a Multi-Layer Gold and Silver Film