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Baruah B, Craighead C, Abolarin C. One-phase synthesis of surface modified gold nanoparticles and generation of SERS substrate by seed growth method. Langmuir. 2012;28(43):15168-76doi: 10.1021/la302861b.
Baruah, B., Craighead, C., & Abolarin, C. (2012). One-phase synthesis of surface modified gold nanoparticles and generation of SERS substrate by seed growth method. Langmuir : the ACS journal of surfaces and colloids, 28(43), 15168-76. https://doi.org/10.1021/la302861b
Baruah, Bharat, et al. "One-phase synthesis of surface modified gold nanoparticles and generation of SERS substrate by seed growth method." Langmuir : the ACS journal of surfaces and colloids vol. 28,43 (2012): 15168-76. doi: https://doi.org/10.1021/la302861b
Baruah B, Craighead C, Abolarin C. One-phase synthesis of surface modified gold nanoparticles and generation of SERS substrate by seed growth method. Langmuir. 2012 Oct 30;28(43):15168-76. doi: 10.1021/la302861b. Epub 2012 Oct 17. PMID: 23025402.
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Langmuir. 2012 Oct 30;28(43):15168-76. doi: 10.1021/la302861b. Epub 2012 Oct 17.

One-phase synthesis of surface modified gold nanoparticles and generation of SERS substrate by seed growth method.

Langmuir : the ACS journal of surfaces and colloids

Bharat Baruah, Carl Craighead, Caleb Abolarin

Affiliations

  1. Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, Georgia 30144-5591, United States. [email protected]

PMID: 23025402 DOI: 10.1021/la302861b

Abstract

In this study, we report a novel and facile single-phase synthesis of stable AuNP-CTAB(NA) conjugates with good dispersibility, bearing a bilayer of cationic surfactant, cetyltrimethylammonium bromide (CTAB) supported by N-nonylamine (NA) as a cosurfactant. We investigated AuNP-CTAB(NA) conjugates by (1)H NMR spectroscopy, UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and transmission electron microscopy (TEM). These studies suggest the presence of a CTAB bilayer on the nanoparticles surface forming an admicelle and NA embedded in the hydrophobic core of that bilayer. AuNP-CTAB(NA) conjugates remain dispersed in water even in the presence of high concentrations of salt and over a wide range of solution pHs. These conjugates further grow bigger when treated with additional AuCl(4)(-), CTAB, and NA in the presence of the mild reducing agent, hydroquinone (HQ). The larger AuNP-CTAB(NA)-1 conjugates serve as SERS (surface-enhanced Raman Scattering) substrate of Raman active dye even at nanomolar concentrations.

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