Accession Number : ADA474807


Title :   Nanoscale Ionic Liquids


Descriptive Note : Final rept. 1 Dec 2005-30 Nov 2006


Corporate Author : CORNELL UNIV ITHACA NY DEPT OF MATERIALS SCIENCE AND ENGINEERING


Personal Author(s) : Giannelis, Emmanuel P ; Lee, Dongkyu ; Burgaz, Engin ; Wang, Dongyan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a474807.pdf


Report Date : Nov 2006


Pagination or Media Count : 10


Abstract : The focus of this program was a new family of solvent-less nanoparticle fluids (hereafter referred to as nanoparticle fluids, NFs) comprised of a charged corona grafted to various nanoparticle cores. NFs possess flow properties (viscosity and diffusivity) remarkably similar to simple molecular liquids even in the absence of any diluent or solvent. Additionally, unlike molecular liquids, NFs do not possess a measurable vapor pressure dramatically increasing the range of potential applications. Furthermore, since NFs are hybrid systems, they can be engineered to combine specific properties (e.g. conductivity, magnetic susceptibility, refractive index, photoluminescence) that are difficult or impossible to achieve with molecular-based liquids. These new materials offer new and unique opportunities because their physical properties can be manipulated over a wide range, from liquid to solid, by varying the size and concentration of the nanoparticles as well as the temperature. The fluid character at low temperatures especially in the absence of solvents facilitates many new applications where conventional colloidal suspensions either cannot be used or require special design to reduce solvent loss. Applications of potential interest to the Air-Force include lubricants for deployed space systems and MEMS, alternative coolants for thermal management applications, electrolytes for high-temperature fuel cells/batteries, ferrofluids for actuators, compliant electrodes, zero VOC inks for microfabrication, and high refractive index liquids.


Descriptors :   *PHASE TRANSFORMATIONS , *FLOW , *NANOSTRUCTURES , MILITARY APPLICATIONS , SULFONATES , ANIONS , NANOTECHNOLOGY , MILITARY CRITICAL TECHNOLOGY , ELECTRICAL CORONA , VISCOSITY , FLUIDS , MOLECULAR STRUCTURE


Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE