Functionalization of Metallic Nanoparticles with Methyl-Thiol Molecules

Functionalization of Au and Ag nanoparticles with thiol molecules has been a topic of high interest, due to their peculiar and unique properties of their organic-metal interfaces. Thiols are well-known ligand molecules because they are able to form a self-assembled monolayer on the metal n

Multifunctional Nanoparticles Can Target, Separate and Destroy Bacteria

JSU & UT San Antonio team members have reported the development of multifunctional popcorn shape iron magnetic core- gold plasmonic shell nanotechnology-driven approach for targeted magnetic separation & enrichment, label-free surface enhanced Raman spectroscopy detection, and sel

JSU-UCSB PREM’s Summer Program for K12 Participants: Impact on the Community

NSF-JSU-UCSB PREM members arranged summer program for K12 minority participants, to help local science students in their mission of enhancing scientific literacy to wider audiences. This program is very popular in Jackson, MS and it helps to raise the number of STEM minority students ev

Measuring the strength of individual metal nanoparticles

It is well established that matter behaves in a different manner at the nanoscale compared with their bulk counterparts. Mostly, this is due to confinement of electron, increased surface to volume ratio, composition, etc.; therefore, the study of matter at the nanoscale is of crucial relev

A Nanoparticle-Based Sensor of Oxidative Stress

Oxidative stress is a critical process in biological systems, involved in both normal and pathological functions; thus it is a commonly measured endpoint. Current methods for measuring oxidative stress are affected by artifacts, such as auto-oxidation. We are developing a new measurement

Biomedical Imaging with NIR Upconverting Nanoparticles

Rare-earth doped nanoparticles (NPs) are known to have exceptional optical properties such as strong absorption and sharp emission lines. Since the optical properties are due to the f-f electron transitions, these nanoparticles do not photobleach like organic dyes or blink like quantum do

Doping graphene with UV light

CVD Graphene was synthesized at PENN. A Field Effect Transistor was fabricated at UPRH . No lithography was used (i.e. no harsh chemicals used) to define the source and drain electrodes, instead a TEM grid was used as a shadow mask. This is new to graphene based device fabrication. The d

Organic phase behavior connects to an array of inorganic structure

The self-assembly dynamics of our two-dimensionally confined organic films defines the composite nanostructure. Mimicking biology, highly organized templates lead to polycrystallinity, and sparse films lead to large single crystals, but films on the phase envelope lead to complex composi

Self-Assembly as a Method to Device Construction

Surfactant molecules of Tau-3PDP and Phs-3PDP self-assemble into fractal patterns when placed on an air-water interface. These fractal crystals can subsequently be coated with various metallic films and used in electronic devices. Several labs are currently trying to unlock the potential

Numerical Simulations of Droplet Deformation Under Shear Flow

Numerical simulations of the deformation of a droplet in viscous fluid under shear flow are performed with the Lattice Boltzmann method (LBM) based on the Cahn-Hilliard diffuse interface approach. The Degree of confinement between two parallel walls, which is defined as the ration betwee

Molecular Dynamics Simulations of Drops Falling on a Surface

Molecular dynamics simulations are used to study the dynamics of drop splashing on a solid surface. In agreement with experiment, we observe that splashes occur only in the presence of vapor. We are investigating how the flow in the vapor produces the stress which tears the drop into fr

Reversible Behavior in 17nm Fe3O4 Capped Janus Particles

The structure transitions from staggered to loose double chain configuration as the voltage is ramped down at constant magnetic field. As the voltage is ramped back up the structure reforms and the staggered character begins to re-emerge.