Uma Shanker Rai

TL;DR: The results show that the HRS assay for monitoring Hg(II) ions using MPA-HCys-PDCA-modified gold nanoparticles has excellent selectivity over alkali, alkaline earth and transition heavy metal ions.

TL;DR: This work reports cytotoxicity of gold nanomaterial of different size and shape using MTT test, absorption spectroscopy and TEM, which indicates that spherical gold nanoparticles with different sizes are highly toxic to human skin cells.

TL;DR: It is demonstrated that the second-order nonlinear optical properties of gold nanorods can be used for screening HIV-1 viral DNA sequence without any modification, with good sensitivity (100 pico-molar) and selectivity (single base-pair mismatch).

TL;DR: In this article, the authors review the synthesis, grain growth, morphological evolution, effect of impurities, substitution and interface anisotropy on the dielectric constant, resistivity and other materials parameters.

TL;DR: In this paper, a gold nanoparticle based surface enhanced fluorescence (NSEF) spectroscopy was proposed for rapid and sensitive screening of organophosphorus agents. But the authors did not discuss the mechanism of fluorescence enhancement and role of OPA for fluorescence intensity change in the presence of gold nanoparticles.