New York – often called New York City or the City of New York to distinguish it from the State of New York, of which it is a part – is the most populous city in the United States and the center of the New York metropolitan area, the premier gateway for legal immigration to the United States and one of the most populous urban agglomerations in the world. A fast-paced global power city, New York exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment. Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation. This energy is at a specific resonance frequency which depends on the strength of the magnetic field and the magnetic properties of the isotope of the atoms; in practical applications, the frequency is similar to VHF and UHF television broadcasts (60–1000 MHz). NMR allows the observation of specific quantum mechanical magnetic properties of the atomic nucleus. Many scientific techniques exploit NMR phenomena to study molecular physics, crystals, and non-crystalline materials through NMR spectroscopy. NMR is also routinely used in advanced medical imaging techniques, such as in magnetic resonance imaging (MRI)
In magnetic resonance, a spin echo is the refocusing of spin magnetisation by a pulse of resonant electromagnetic radiation. Modern nuclear magnetic resonance (NMR) and magnetic resonance imaging make use of this effect..
"GWM HahnEchoDecay" by Gavin W Morley - Own work. Licensed under CC BY-SA 3.0 via Commons - https://commons.wikimedia.org/wiki/File:GWM_HahnEchoDecay.gif#/media/File:GWM_HahnEchoDecay.gif
In the period from 1/ july/2014 to 31/aug/2014 I was guest of the Hunter College, in the laboratory of the Professor Steve G. Greenbaum.
Ether based electrolytes with different chain length CH3O[CH2CH2O]nCH3 (DME-DEGDME-DOL:DME-TEGDME-PEG250DME-PEG500DME) and lithium triflate LiCF3SO3 , were investigated by Bruker 400 Avance III NMR using pulse field gradient method.
Self diffusion coefficients of 1H, 19F, and 7Li nuclei were carried out by NMR instrument in the temperature range from 20°C to 80°C collecting data every 10 °C, in order to obtain the transference number of the cation, conductivity measures, Ionic association degree and the activation energy of the self diffusion coefficient.
695 Park Ave, New York, NY 10065, USA
One of the foremost technological challenges of the coming decades is energy storage for electric vehicles, military, aerospace, and other applications. The research concerns the evaluation of materials being developed for fuel cells and lithium batteries, which are two technologies undergoing rapid growth. In polymer electrolytes for both fuel cell and lithium battery applications, we investigate the dynamics of ion transport in these disordered media by solid state NMR methods. NMR is also utilized, along with EPR and synchrotron x-ray absorption techniques (EXAFS, XANES), to study local atomic arrangements and electronic band structure of lithium - transition metal oxide insertion compounds being developed for battery electrodes, and noble metal alloys for fuel cell catalysts. The x-ray absorption spectroscopy is conducted at the National Synchrotron Light Source located at nearby (~90 minutes by car) Brookhaven National Lab. In addition to Brookhaven, our group collaborates with several other national labs (Argonne National Lab, NASA Jet Propulsion Lab, Air Force Research Lab and numerous universities, worldwide, on the development and characterization of new power sources.