Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7691205 | Vibrational Spectroscopy | 2014 | 4 Pages |
Abstract
We performed a feasibility test of the cosmetic ingredient kinetin (KT)-gold nanoparticle (AuNP) conjugates by means of vibrational Raman spectroscopy and quantum mechanical calculations. The adsorptions of KT on AuNP surfaces were examined by absorption spectra and surface-enhanced Raman scattering (SERS). The size of KT at the initial concentrations of 10â5Â M with the AuNP composites was measured to be 22Â nm. Density functional theory (DFT) calculations were performed to estimate the energetic stabilities of KT on an Au cluster atom. The two tautomeric forms of 9H-amino and 7H-amino in KT are predicted to have similar energies on Au. The N3-coordinating geometries in both 9H-amino and 7H-amino forms of KT are predicted to be most stable on an Au cluster. Vibrational analysis also suggested that the two tautomers of KT should coexist in the adsorbed state on Au. The concentration-dependent SERS spectra of KT indicated that 5Â ÃÂ 10â5Â M exhibited the highest SERS signals.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Anh Thu Ngoc Lam, Erdene-Ochir Ganbold, Kwang-Hwi Cho, Daeseung Kang, Sang-Woo Joo,