Jackson State University – TechConnect Briefs

Fabrication and Characterization of pH-Responsive, Nanoparticle-Attached Porphyrins for Singlet Oxygen Production

Courtney S., Ellis E.D., Gandra N., Gao R., Li W., Tiyyagura P.T., Jackson State University, US

The goal of this work was to understand if singlet oxygen (1O2) production from an immobilized dye could be regulated directly on support media such as titania and silica. Two types of pH- responsive, nanoparticle-attached [...]

Gold nanoparticle-based miniaturized NSET Probe for rapid and ultra-sensitive detection of toxic metals in soil, water and fish

Darbha G.K., Ray A., Ray P.C., Jackson State University, US

Contamination of the environment with toxic metals like mercury and arsenic have been an important concern throughout the world for decades. Human exposure to high Hg or As levels can harm the brain, heart, kidneys, [...]

Gold nanoparticle-based miniaturized NSET Probe for rapid and ultra-sensitive detection of toxic metals in soil, water and fish

Darbha G.K., Ray A., Ray P.C., Jackson State University, US

Contamination of the environment with toxic metals like mercury and arsenic have been an important concern throughout the world for decades. Human exposure to high Hg or As levels can harm the brain, heart, kidneys, [...]

Vibrational Modes of Metal Nanoshells

Kirakosyan A.S., Shahbazyan T.V., Jackson State University, US

We study coherent oscillations of radial breathing modes in metal nanoparticles with a dielectric core. Vibrational modes are impulsively excited by a rapid heating of the particle lattice that occurs after laser excitation, while the [...]

Surface-Enhanced Raman Scattering in Small Noble-Metal Nanoparticles

Pustovit V.N., Shahbazyan T.V., Jackson State University, US

We present a microscopic theory of quantum-size effects in surface-enhanced Raman scattering (SERS) from molecules adsorbed on small metal nanoparticles. In noble-metal nanoparticles, the confining potential has different effect on s-band and d-band electrons. Namely, [...]

Finite-Size Effects and Surface-Enhanced Raman Scattering from Molecules Adsorbed on Noble-Metal Nanoparticles

Pustovit V.N., Shahbazyan T.V., Walker K.M., Jackson State University, US

We study theoretically the role of strong electron confinement on surface-enhanced Raman scattering (SERS) from molecules adsorbed on metal nanoparticles. We describe a novel enhancement mechanism, relevant for nanometer-sized noble-metal particles, which originates from different [...]