UPRM PREM Professor Receives Presidential Award

UPRM PREM Prof. Carlos Rinaldi who in 2006 received the National Science Foundation's (NSF) Faculty Early Career Development Program (CAREER) award was one of the 20 NSF nominees who received the US government's highest honor for scientists and engineers beginning their independent careers

Materials Student Chapter Spotlighted in International Professional Publication

The Material Advantage Chapter of the University of Puerto Rico-Mayagüez (UPRM), founded under the auspice of UPRM PREM, received a spotlight on the October 2007 issue of JOM. This is published by The Minerals, Metals & Materials Society and is distributed globally. The 2-column spotli


In October – December 2007, PREM will bring Strange Matter to Casa Roig Museum Humacao, Puerto Rico. See more details at prem.uprh.edu

Smart Materials for Manipulating Cell/Surface and Cell/Cell Interactions

Poly(N-isopropyl acrylamide) (pNIPAM) undergoes a sharp property change in response to a moderate temperature drop. When the polymer is maintained above its lower critical solution temperature (LCST, ~32 °C), most biological cells are observed to adhere. However, below its LCST, confluent

Anomalous Bias Dependence of Spin Torque in Magnetic Tunnel Junctions

When a spin polarized current passes through a magnetic multilayer structure, it can transfer spin angular momentum from one ferromagnet to another, and hence exert a torque on the magnetic moments of the electrodes. At sufficiently high current densities, this spin transfer torque can ev

Charge and Spin Transport and Symmetry Broken State in Graphene

We reproduce the recent experimentally discovered odd integer quantum Hall effect in graphene The bottom image reveals a stripe order and symmetry broken state in higher Dirac Landau levels Small projects involved in this research are used in a new course taught at CSUN by Dr. Sheng (

First Prizes in TMS 2007 Student Posters Competition

During its 2007 Annual Meeting held in Orlando, FL (Feb. 25 - March 2) The Minerals, Metals and Materials Society (TMS) hosted their Technical Division Student Posters Contest. The competition included five technical categories. Two PREM undergraduate students won first prizes their corres

Molecular Dynamics Simulations of DNA- Covered Carbon Nanotubes

Myrna Merced Serrano*, José O. Sotero Esteva, UPR-Humacao Robert Johnson**, A.T. Johnson, U. of. Pennsylvania * Undergraduate Student (sophomore) ** Graduate Student A FET device made with a single wall carbon nanotube (SWCNT) decorated with single-strand DNA (ss-DNA) has shown

Nanotubes for the Future

In February 2007, UPRM PREM hosted more than 140 students, members of the five Materials Science and Engineering clubs formed in public schools under the auspices of PREM. The activity was organized by PREM’s Office of Outreach and Education led by Prof. J. Santos and was partly financed b

Very Large Infrared Two-Photon Absorption Cross Section of Asymmetric Zinc Porphyrin Aggregates: Role of Intermolecular Interaction and Donor-Acceptor Strengths

One of the long-standing challenges is the development of organic compounds, which exhibits a large value of the 2PA cross section at wavelength(s) above 700 nm. We have designed a series of D-A Zn-porphyrin aggregates that possess exceptionally large Two Photon Absorption (TPA) cross se

Gold Nanoparticle Based FRET Asssay for Detection of DNA Cleavage

This represents the first nanoparticle-based fluorescence assay for probing single-strand DNA nuclease activity. Our simple assay with extremely high sensitivity will make it widely applicable and highly useful for convenient characterization of DNA/RNA cleavage reactions Given the simplic

Magnetic Bead Assays

Certain antibiotics bind to specific receptors on bacterial cell walls blocking further growth and eventually leading to the bacterial death. Dr. Menake Piyasena (PREM Post-doc fellow) at CSULA has demonstrated a bead-based technique on a microfluidic format that can be used to monitor ba