- 1562 Unionport Road, Apt. 4B
Bronx, NY 10462 - (949) 202-6667
Ian Nieves
Hunter College, Physics and Astronomy, Post-Doc
- Science Education, Biophysics, Electron Microscopy, Monte Carlo Simulation, Numerical Simulations, Nuclear Magnetic Resonance, and 33 moreNanodevices, Scanning Probe Microscopy, Space Exploration, Electron Spin Resonance, Implantable neural electrodes, Solid State NMR, Solid-state NMR, Energy storage systems, Li-ion battery modeling and control design in electrified vehicles, High Performance Computing, High Performance Computing Applications development for Atmosphere modeling, Scientific Computing (Computational Science), Computing In Mathematics, Natural Sciences, Engineering And Medicine, Computational Neuroscience, Distributed Computing, Parallel Computing, Computer Graphics, Image Processing, Nanostructured Electrodes, Polymer Solar Cells, Nanostructured Carbon Electrodes, Photorefractive Polymers and Supercapacitors, Nanomaterials, Graphene, Carbon Nanotubes, Nanoparticles, Nanorod, Quantum Dots, Astronomy, Astrophysics, 3d Printers, Global 3D Printer Market, 3D Printing Process, and RepRapedit
- Using solid state nuclear magnetic resonance (NMR) to characterize reactions and kinetics in silver vanadate and carbon monofluoride-based in vivo power cells for deep brain stimulation. Using electron spin resonance (ESR) to monitor cat... moreUsing solid state nuclear magnetic resonance (NMR) to characterize reactions and kinetics in silver vanadate and carbon monofluoride-based in vivo power cells for deep brain stimulation. Using electron spin resonance (ESR) to monitor cation formation in pentacene intended for fabricating organic solar sell. Mentoring undergraduate and doctoral students.edit
This work analyses the production of Al based composites with particulate reinforcement, via mechanical alloying. Composites were produced by mixing Al and NbAl3 powders by high energy mechanical alloying, under liquid nitrogen... more
This work analyses the production of Al based composites with particulate reinforcement, via mechanical alloying. Composites were produced by mixing Al and NbAl3 powders by high energy mechanical alloying, under liquid nitrogen atmosphere, followed by cold pressing and hot sintering; and by controlling NbAl3 phase precipitation in liquid Al (in situ formation of the reinforcement). Results on composite produced from powders showed better distribution and incorporation, besides finer dispersion of particles in the matrix when mechanical alloying is employed. In this case, high dispersion on particulate phase was found despite predominance of small particles; there are no evidence of interface formation. When composites are produced by in situ formation of NbAl3 intermetallics, results showed that the formation of the reinforcement directly from the liquid matrix and the peritectic reaction between NbAl3 and liquid Al, provide a perfect reinforcement/matrix interface. Products showed good mechanical properties, good wear behavior and reduced thermal expansion.
AgGaxIn1−xSe2 single crystals with x=0.4 have been grown by the horizontal Bridgman technique for nonlinear optical application requires phase matching. High purity polycrystalline synthesis of AgGaxIn1−xSe2 was carried out at 850 °C,... more
AgGaxIn1−xSe2 single crystals with x=0.4 have been grown by the horizontal Bridgman technique for nonlinear optical application requires phase matching. High purity polycrystalline synthesis of AgGaxIn1−xSe2 was carried out at 850 °C, which is a relatively lower temperature compared to those in earlier reports, thus reducing secondary phase formation. An average Ga:In ratio of 62:38 (±3%) was measured using energy dispersive spectroscopy (EDS). As grown, a single crystal shows very high IR transmission of not, vert, similar65% in the spectral range of 4000–600 cm−1. There was no significant change in its IR transmission after annealing it at 500 °C for 20 days in vacuum in the presence of AgGaxIn1−xSe2 powder. This indicates a low concentration of defects in the crystal. The results demonstrate that the improved new synthesis method for crystal growth was promising and that the quality of the crystal was good.
Dynamic finite element analysis (FEA) was used to verify the ability of a novel percussion instrument to characterize the composition and structure of laminated materials and glass columns and to elucidate key facets of this process.... more
Dynamic finite element analysis (FEA) was used to verify the ability of a novel percussion instrument to characterize the composition and structure of laminated materials and glass columns and to elucidate key facets of this process. Initial simulations modeling the percussion process ...