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Kinetically-Controlled Growth of Chestnut-Like Au Nanocrystals with High-Density Tips and Their High SERS Performances on Organochlorine Pesticides.
- Source :
-
Nanomaterials (2079-4991) . Jul2018, Vol. 8 Issue 7, p560. 15p. - Publication Year :
- 2018
-
Abstract
- Amodified seed growth routewas developed to fabricate theAu nanocrystalswith high-density tips based on kinetically-controlled growth via adjusting the adding rate of Au seeds into growth solution. The obtained Au nanostructures were chestnut-like in morphology and about 100 nm in size. They were built of the radial [111]-oriented nanoneedles andwere 30-50 nmin length. Therewere about 120-150 tips in each nanocrystal. The formation of chestnut-like Au nanocrystals is ascribed to surfactant-induced preferential growth of seeds along direction [111]. Importantly, the chestnut-like Au configuration displayed powerful surface enhanced Raman scattering (SERS) performance (enhance factor > 107), owing to the high density of tips. Further, such film was used as a SERS substrate for the detection of lindane (γ -666) molecules (the typical organochlorine pesticide). The detection limit was about 10 ppb, and the relationship between SERS intensity I and concentration C of 666 accords with the double logarithm linear. This work presents a simple approach to Au nanocrystal with high-density tips, and provides a highly efficacious SERS-substrate for quantitative and trace recognition of toxic chlorinated pesticides. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOCRYSTALS
*SERS spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 8
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 131979181
- Full Text :
- https://doi.org/10.3390/nano8070560