Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 19, Pages 4800-4804Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201800487
Keywords
aggregates; controlled detection; illicit drugs; NaCl crystal; SERS platform
Categories
Funding
- Sci-tech Police Project of Anhui Province [1704d0802186]
- National Science Foundation of China [21571180, 21505138]
- China Postdoctoral Science Foundation [2016T90590]
- Anhui Natural Science Foundation [1508085MB26]
Ask authors/readers for more resources
A sodium chloride crystal-driven spontaneous hot spot structure was demonstrated as a SERS-active platform, to get reproducible SERS signals, and eliminate the need for mapping large areas, in comparison with solution phase testing. During the process of solvent evaporation, the crystals produced induced silver aggregates to assemble around themselves. The micro-scale crystals can also act as a template to obtain an optical position, such that the assembled hot area is conveniently located during SERS measurements. More importantly, the chloride ions added in colloids can also replace the citrate and on the surface of the silver sol, and further decrease the background interference. High quality SERS spectra from heroin, methamphetamine (MAMP), and cocaine have been obtained on the crystal-driven hot spot structure with high sensitivity and credible reproducibility. This approach can not only bring the nanoparticles to form plasmonic hot spots in a controlled way, and thus provide high sensitivity, but also potentially be explored as an active substrate for label-free detection of other illicit drugs or additives.
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