Selection of nanoparticles using CO.sub.2-expanded liquids

Roberts, Christopher B; McLeod, Marshall Chandler; Anand, Madhu

Title: Selection of nanoparticles using CO.sub.2-expanded liquids

Patent · Tue Feb 19 00:00:00 EST 2013

OSTI ID:1082913

Roberts, Christopher B; McLeod, Marshall Chandler; Anand, Madhu

A method for size selection of nanostructures comprising utilizing a gas-expanded liquids (GEL) and controlled pressure to precipitate desired size populations of nanostructures, e.g., monodisperse. The GEL can comprise CO.sub.2 antisolvent and an organic solvent. The method can be carried out in an apparatus comprising a first open vessel configured to allow movement of a liquid/particle solution to specific desired locations within the vessel, a second pressure vessel, a location controller for controlling location of the particles and solution within the first vessel, a inlet for addition of antisolvent to the first vessel, and a device for measuring the amount of antisolvent added. Also disclosed is a method for forming nanoparticle thin films comprising utilizing a GEL containing a substrate, pressurizing the solution to precipitate and deposit nanoparticles onto the substrate, removing the solvent thereby leaving a thin nanoparticle film, removing the solvent and antisolvent, and drying the film.

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Research Organization:: Auburn University (Auburn, AL)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-01ER15255

Assignee:: Auburn University (Auburn, AL)

Patent Number(s):: 8,377,831

Application Number:: 12/082,189

OSTI ID:: 1082913

Country of Publication:: United States

Language:: English

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