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1. Facile displacement of citrate residues from gold nanoparticle surfaces

Author:
Athukorale, Sumudu A.,   et al.   ; Perera, Ganganath S.; Perez, Felio; Pittman, Charles U.; Zhang, Dongmao;     Show all 5 Authors
Source:
Journal of colloid and interface science 2018 v.511 pp. 335-343
ISSN:
0021-9797
Subject:
X-radiation; X-ray photoelectron spectroscopy; adenine; chemistry; citrates; gold; halides; ligands; nanogold; nanoparticles; silicone
Abstract:
... The stability of citrate-residues on gold nanoparticles (AuNPs) against ligand displacement has been controversial. Using AuNPs synthesized with deuterated citrate in combination with in-situ surface-enhanced Raman spectroscopic (SERS) analysis, we report that both citrate-residues and solution impurities can be simultaneously adsorbed onto citrate-reduced AuNPs in solution. The citrate-residues c ...
DOI:
10.1016/j.jcis.2017.10.014
CHORUS:
10.1016/j.jcis.2017.10.014

2. Determining the Liquid Light Scattering Cross Section and Depolarization Spectra Using Polarized Resonance Synchronous Spectroscopy

Author:
Athukorale, Sumudu A.,   et al.   ; Zhou, Yadong; Zou, Shengli; Zhang, Dongmao;     Show all 4 Authors
Source:
Analytical chemistry 2017 v.89 no.23 pp. 12705-12712
ISSN:
1520-6882
Subject:
1-propanol; acetone; acetonitrile; benzene; carbon disulfide; carbon tetrachloride; constitutional isomerization; cyclohexanes; dimethyl sulfoxide; dimethylformamide; ethanol; hexane; isomers; light scattering; liquids; methanol; pyridines; researchers; solvents; spectroscopy; tetrahydrofuran; toluene
Abstract:
... Rayleigh scattering is a universal material property because all materials have nonzero polarizability. Reliable quantification of the material light scattering cross section in the liquid phase and its depolarization spectra is, however, challenging due to a host of sample and instrument issues. Using the recently developed polarized resonance synchronous spectroscopic method, we reported the lig ...
DOI:
10.1021/acs.analchem.7b02721