University of California

International Business Machines Corporation

University of Texas System

Leland Stanford Junior University

Heliotrope Technologies, Inc.

Delia J Milliron

Armand Paul Alivisatos

Raffaella Buonsanti

Anna Llordes

Guillermo Garcia

Brett Anthony Helms

Ilan Gur

Ravisubhash Tangirala

Janke J Dittmer

Wendy U Huynh

Marissa A Caldwell

James L Hedrick

David Brian Mitzi

Alshakim Nelson

Russell Clayton Pratt

Liberato Manna

Bonil Koo

Evelyn Rosen

P James Schuck

Bruce E Cohen

Gary Ong

Daniel J Gargas

Hsin-Che Lu

Elan M Katz

Anna Llordés Gil

Gabriel LeBlanc

Evan Runnerstrom

Tracy M Mattox

Luca De Trizio

Emory M Chan

Camila Saez Cabezas

Yang Wang

Clayton Dahlman

Haitao Liu

Steven M Hughes

Byung Hyo Kim

Alexis D Ostrowski

Paul A Alivisatos

Disclosed herein are porous electrochromic niobium oxide films comprising a plurality of niobium oxide nanocrystals, wherein the plurality of niobium oxide nanocrystals comprise niobium oxide having a formula of NbOwhere x represents the average Nb:O ratio in the niobium oxide and where x is from 2 to 2.6. Also disclosed herein are methods of making the porous electrochromic niobium oxide films, methods of use of the porous electrochromic niobium oxide films, and devices comprising the porous electrochromic niobium oxide films.

Porous electrochromic niobium oxide films and methods of making and use thereof

Described are electrochromic films produced by low temperature condensation of polyoxometalates and applications thereof. A method of producing an electrochromic film includes depositing a polyoxometalate (POM) solution on a substrate to form a POM film. The POM solution includes anionic POM clusters and counter ions, and may be doped with near-infrared plasmonic nanocrystals. The film is chemically cured using an acid to condense the POM clusters within the POM film. Another method of producing an electrochromic film includes electrochemical deposition and condensation of POM clusters.

Methods for producing electrochromic films by low temperature condensation of polyoxometalates

Disclosed herein are nanostructured conducting films. The nanostructured conducting films can comprise a nanocrystal phase comprising a plurality of nanocrystals comprising a first metal chalcogenide, the nanocrystal phase being dispersed within a continuous phase comprising a second metal chalcogenide, and wherein the nanocrystal phase, the continuous phase, or a combination thereof further comprises a dopant. In some examples, the first metal chalcogenide and/or the second metal chalcogenide comprise a metal oxide. Also disclosed herein are transparent conducting oxide films having heterogeneous dopant distributions, the films having high mobility, good conductivity, or combinations thereof. Also described herein are methods of making and methods of use of the nanostructured conducing films described herein.

Nanostructured conducting films with a heterogeneous dopant distribution and methods of making and use thereof

The present invention provides an electrochromic nanocomposite film. In an exemplary embodiment, the electrochromic nanocomposite film, includes (1) a solid matrix of oxide based material and (2) transparent conducting oxide (TCO) nanostructures embedded in the matrix. In a further embodiment, the electrochromic nanocomposite film farther includes a substrate upon which the matrix is deposited. The present invention also provides a method of preparing an electrochromic nanocomposite film.

Electrochromic nanocomposite films

An electrochromic device includes a nanostructured transition metal oxide bronze layer that includes one or more transition metal oxide and one or more dopant, a solid state electrolyte, and a counter electrode. The nanostructured transition metal oxide bronze selectively modulates transmittance of near-infrared (NIR) spectrum and visible spectrum radiation as a function of an applied voltage to the device.

Conductive transition metal oxide nanostructured electrochromic material and optical switching devices constructed thereof

Nanocrystals comprising organic ligands at surfaces of the plurality of nanocrystals are provided. The organic ligands are removed from the surfaces of the nanocrystals using a solution comprising a trialkyloxonium salt in a polar aprotic solvent. The removal of the organic ligands causes the nanocrystals to become naked nanocrystals with cationic surfaces.

Surface chemical modification of nanocrystals

Certain nanocrystals possess exceptional optical properties that may make them valuable probes for biological imaging, but rendering these nanoparticles biocompatible requires that they be small enough not to perturb cellular systems. This invention describes a phosphorescent upconverting sub-10 nm nanoparticle comprising a lanthanide-doped hexagonal &#x3b2;-phase NaYFnanocrystal and methods for making the same.

Controlled synthesis of bright and compatible lanthanide-doped upconverting nanocrystals

The embodiments described herein provide an electrochromic device. In an exemplary embodiment, the electrochromic device includes (1) a substrate and (2) a film supported by the substrate, where the film includes transparent conducting oxide (TCO) nanostructures. In a further embodiment, the electrochromic device further includes (a) an electrolyte, where the nanostructures are embedded in the electrolyte, resulting in an electrolyte, nanostructure mixture positioned above the substrate and (b) a counter electrode positioned above the mixture. In a further embodiment, the electrochromic device further includes a conductive coating deposited on the substrate between the substrate and the mixture. In a further embodiment, the electrochromic device further includes a second substrate positioned above the mixture.

Nanostructured transparent conducting oxide electrochromic device

An embodiment of an inorganic nanocomposite includes a nanoparticle phase and a matrix phase. The nanoparticle phase includes nanoparticles that are arranged in a repeating structure. In an embodiment, the nanoparticles have a spherical or pseudo-spherical shape and are incompatible with hydrazine. In another embodiment, the nanoparticles have neither a spherical nor pseudo-spherical shape. The matrix phase lies between the nanoparticles of the nanoparticle phase. An embodiment of a method of making an inorganic nanocomposite of the present invention includes forming a nanoparticle superlattice on a substrate. The nanoparticle superlattice includes nanoparticles. Each nanoparticle has organic ligands attached to a surface of the nanoparticle. The organic ligands separate adjacent nanoparticles within the nanoparticle superlattice. The method also includes forming a solution that includes an inorganic precursor. The nanoparticle superlattice is placed in the solution for a sufficient time for the inorganic precursor to replace the organic ligands.

Nanocomposite and method of making thereof

Described is an electrochromic nanocomposite film comprising a solid matrix of an oxide based material, the solid matrix comprising a plurality of transparent conducting oxide (TCO) nanostructures dispersed in the solid matrix and a lithium salt dispersed in the solid matrix. Also described is a near infrared nanostructured electrochromic device having a functional layer comprising the electrochromic nanocomposite film.

Nanocrystal-polymer nanocomposite electrochromic device

The present invention provides a method of preparing aluminum-doped zinc oxide (AZO) nanocrystals. In an exemplary embodiment, the method includes (1) injecting a precursor mixture of a zinc precursor, an aluminum precursor, an amine, and a fatty acid in a solution of a vicinal diol in a non-coordinating solvent, thereby resulting in a reaction mixture, (2) precipitating the nanocrystals from the reaction mixture, thereby resulting in a final precipitate, and (3) dissolving the final precipitate in an apolar solvent. The present invention also provides a dispersion. In an exemplary embodiment, the dispersion includes (1) nanocrystals that are well separated from each other, where the nanocrystals are coated with surfactants and (2) an apolar solvent where the nanocrystals are suspended in the apolar solvent. The present invention also provides a film. In an exemplary embodiment, the film includes (1) a substrate and (2) nanocrystals that are evenly distributed on the substrate.

Colloidal infrared reflective and transparent conductive aluminum-doped zinc oxide nanocrystals

The invention described herein provides for thin films and methods of making comprising inorganic semiconductor-nanocrystals dispersed in semiconducting-polymers in high loading amounts. The invention also describes photovoltaic devices incorporating the thin films.

Semiconductor-nanocrystal/conjugated polymer thin films

A photovoltaic device having a first electrode layer, a high resistivity transparent film disposed on the first electrode, a second electrode layer, and an inorganic photoactive layer disposed between the first and second electrode layers, wherein the inorganic photoactive layer is disposed in at least partial electrical contact with the high resistivity transparent film, and in at least partial electrical contact with the second electrode. The photoactive layer has a first inorganic material and a second inorganic material different from the first inorganic material, wherein the first and second inorganic materials exhibit a type II band offset energy profile, and wherein the photoactive layer has a first population of nanostructures of a first inorganic material and a second population of nanostructures of a second inorganic material.

Nanocrystal solar cells processed from solution

A process for forming functionalized nanorods. The process includes providing a substrate, modifying the substrate by depositing a self-assembled monolayer of a bi-functional molecule on the substrate, wherein the monolayer is chosen such that one side of the bi-functional molecule binds to the substrate surface and the other side shows an independent affinity for binding to a nanocrystal surface, so as to form a modified substrate. The process further includes contacting the modified substrate with a solution containing nanocrystal colloids, forming a bound monolayer of nanocrystals on the substrate surface, depositing a polymer layer over the monolayer of nanocrystals to partially cover the monolayer of nanocrystals, so as to leave a layer of exposed nanocrystals, functionalizing the exposed nanocrystals, to form functionalized nanocrystals, and then releasing the functionalized nanocrystals from the substrate.

Methods of making functionalized nanorods

A method including providing Au-doped Co nanoparticles. The nanoparticles include a combination of non-ferromagnetic nanoparticles and weakly ferromagnetic nanoparticles. The nanoparticles each have an exterior surface. The surfaces of the nanoparticles are functionalized with 7-(5-uracil-ylcarbamoyl)heptanoic acid. A polymer is provided having a general formula including a uracil group. A dispersion is formed by agitating a solution of the nanoparticles. The solution is spin cast into a film. The film is heated under vacuum at a first temperature, T, resulting in inducing ferromagnetism in the non-ferromagnetic nanoparticles and converting the non-ferromagnetic nanoparticles to ferromagnetic nanoparticles, and resulting in enhancing ferromagnetism in the weakly ferromagnetic nanoparticles. The nanoparticles are aligned such that magnetic easy axes of the nanoparticles are oriented by applying a magnetic field to the dispersion while at a second temperature less than T. The axes align in a plane parallel to a plane of the film.

Growing community of inventors

Austin, TX, United States of America

Delia J Milliron