Rensselaer Polytechnic Institute

Abb Research Ltd.

Medical University of South Carolina

Albany International Corporation

Richard W Siegel

Linda S Schadler

Brian C Benicewicz

Peng Tao

Pulickel Madhavapanicker Ajayan

Jonathan S Dordick

Anand Viswanath

Carina Önneby

Ying Li

Linda Schadler Feist

Linda S Schadler-Feist

Dongling Ma

Jung-Il Hong

Eva Mårtensson

Glen C Irvin, Jr

Yu Li

Frank Wilhelm Mont

E Fred Schubert

Robert F Karlicek

Lei Wang

Crayton Gregory Toney

Rena Bizios

Linda S Schadler Feist

Chek Beng Ng

David J Poxson

Praveen Bhimaraj

Ravindra S Kane

Robert H Doremus

Alexey A Vertegel

Tao Li

John Mendel

Junrong Zheng

Sekyung Chang

Rahmi Ozisik

Thomas J Webster

Xi Qian

Jennifer E Gagner

Anders Gustafsson

Prashanth Asuri

Lars Palmovist

Sandeep S Karajanagi

John M Nugent

Linda Schadler-Feist

Provided is a phosphor-functionalized nanoparticle that includes an inorganic nanoparticle core; surface polymer brushes that include a plurality of long-chain polymers bonded to the surface of the inorganic nanoparticle core, said long-chain polymers each having molecular weight greater than 500, and a plurality of short-chain polymers bonded to the surface of the inorganic nanoparticle core, said short-chain polymers each having molecular weight less than 0.5 times the average molecular weight of the long-chain polymers; and one or more organic phosphors bonded to at least one of the inorganic nanoparticle core and one or more of the plurality of short-chain polymers. Graft density of the short-chain polymers on the surface of the inorganic nanoparticle core (&#x3c3;) is greater than graft density of the long-chain polymers on the surface of the inorganic nanoparticle core (&#x3c3;). Also provided are polymer matrices, LED's, optical systems, lighting devices, and fixtures that include the inventive nanoparticle.

Organic phosphor-functionalized nanoparticles and compositions comprising the same

The invention is directed to a composite polymer/nanoporous film system and methods of fabrication of tunable nanoporous coatings on flexible polymer substrates. The porosity of the nanoporous film can be tuned during fabrication to a desired value by adjusting the deposition conditions. Experiments show that SiOcoatings with tunable porosity fabricated by oblique-angle electron beam deposition can be deposited on polymer substrates. These conformable coatings have many applications, including in the field of optics where the ability to fabricate tunable refractive index coatings on a variety of materials and shapes is of great importance.

Tunable nanoporous films on polymer substrates, and method for their manufacture

Provided is a gold nanocage with pores, charged ligand molecules covalently bound to internal surfaces of the gold nanocage, and payload molecules electrostatically adsorbed onto said charged ligand molecules, wherein a pore diameter is between 1.2 and 20 times a gyration radius of the payload molecule. Also provided is a method for making a nanoparticle, including using polyvinylpyrrolidone as a capping agent in a galvanic replacement reaction to convert a silver nanocube into a gold nanocage having pores, replacing the polyvinylpyrrolidone on internal surfaces with charged ligand molecules, and electrostatically adsorbing payload molecules onto the charged ligand molecules, with a pore diameter less than twenty times a gyration radius of the payload molecule. Also provided is a method of delivering a pharmacological agent to a mammalian cell, including contacting the cell with a gold nanocage having pores, ligand molecules bound to internal surfaces, and pharmacological agent adsorbed onto ligand molecules.

Internalization of proteins into hollowed gold nanostructures

This invention is directed to the application of a previously unknown property of nanomaterials&#x2014;its ability to enhance protein activity and stability at high temperatures, in organic solvents, and in polymer composites. Nanomaterials such as single-walled carbon nanotubes (SWNTs) can significantly enhance enzyme function and stability in strongly denaturing environments. Experimental results and theoretical analysis reveal that the enhancement in stability is a result of the curvature of these nanoscale materials, which suppresses unfavorable protein-protein interactions.

Enhanced stability of proteins immobilized on nanoparticles

Silicone-based nanocomposites that include a plurality of multimodal nanoparticles dispersed within a silicone-based polymeric matrix are provided. Each of the multimodal nanoparticle has a first plurality of long silicone compatible polymeric chains and a second plurality of short silicone compatible polymeric chains grafted onto a surface of a nanoparticle (e.g., an inorganic nanoparticle, such as silica, alumina, titania, indium tin oxide, CdSe, etc.), with the short silicone compatible polymeric chains present on each multimodal nanoparticle at a higher grafting density than the long silicone compatible polymeric chains. Methods are also provided for forming a silicone-based nanocomposite.

Silicone based nanocomposites including inorganic nanoparticles and their methods of manufacture and use

PU/ZnO nanocomposites are provided wherein the addition of less than 1 vol % 33 nm ZnO nanoparticles into a PU matrix effect a decrease in the Young's Modulus and storage modulus of the polymer, while simultaneously effecting an increase glass transition temperature of the polymer. Detailed experiments are described (e.g., FTIR, DMTA, FESEM and AFM) that suggest that the reaction between hydroxyl groups of the ZnO nanoparticles and isocyanate groups of the polyurethane prepolymer disrupts the self-assembly of the phase separation in PU. Phase separation is responsible for the good mechanical properties of PU. Further, detailed experiments suggest that the increase of the glass transition temperature results from the crosslinking effect of the ZnO nanoparticles.

Block copolymer and nanofiller composites

The present invention includes a method for preparing a nanoparticle filled nanocomposite material, the method including the steps of providing a plurality of nanoparticles. attaching a first layer of organic ligand to the nanoparticle via a phosphate or phosphonate linkage, covalently attaching a second layer of matrix compatible polymer to said first layer of organic ligand to produce modified nanoparticles, providing a polymer matrix and dispersing the modified nanoparticles in the polymer matrix, wherein the dispersement of the modified nanoparticles into the polymer matrix results in a nanocomposite material, and wherein the modified nanoparticles are modified such that the first layer is proximal to the nanoparticle and the second layer is distal to the nanoparticle. Also within the scope of the invention are modified nanoparticles, alternative nanocomposite materials and methods of making the same.

Nanofilled polymeric nanocomposites with tunable index of refraction

A method for preparing a polyester nanocomposite is presented. The method comprises coating nanoparticles with a dicarboxylic acid. Combining the dicarboxylic acid coated nanoparticles with a coupling agent resulting in a first mixture. Then combining the first mixture with a polyester to form a polyester nanocomposite. The resulting polyester nanocomposite has among other properties a glass transition temperature greater than the polyester itself and also a crystallization temperature less than the polyester itself.

Method for producing polyester nanocomposites

A field grading material includes a field grading effective amount of a nanoparticle filler distributed in a polymeric matrix, and the nanoparticle filler is heterogeneously distributed in the polymeric matrix.

Nanocomposites with controlled electrical properties

A field grading material including a polymeric matrix provided with a filler. The filler includes a field grading effective amount of particles having at least one dimension smaller than or equal to 100 nm. A device including the field grading material for grading an electric field in high-voltage applications and a method for grading an electric field at a joint or termination of an electric power cable using the field grading material.

Field grading material

A flash CVD process can be employed to grow micron- and nano-sized tree-like structures, particularly carbon structures on graphite electrodes. This process involves fast cyclic resistive heating of electrodes in an atmosphere of inert gas and hydrocarbons at below atmospheric pressure.

Carbon nanotrees formed by flash CVD method

A process for producing microtubes from nanoparticles includes forming a dispersion of the nanoparticles in a liquid phase and freeze-drying the dispersion to produce microtubes. The nanoparticles have surface functionality capable of self-bonding and bonding with the liquid phase during freeze-drying, particularly surface hydroxy functionality.

Tubular microstructures via controlled nanoparticle assembly

Scratch-resistant nanocomposite materials contain at least one film-forming hydrophilic colloid and at least one ceramic nanoparticle material. In particular, the film-forming hydrophilic colloid may be a gelatin, and the ceramic nanoparticle material may be alumina. In another aspect, the invention relates to scratch-resistant imaging elements comprising a support and a layer comprising such a nanocomposite material. The nanocomposite layer may be employed as an imaging layer, or as a protective layer disposed between an imagining layer and the environment.

Gelatin nanocomposites

Polymer resins incorporating nanoparticles having a particle size in the range of 1-100 nm and a narrow particle size distribution have improved tensile properties and scratch resistance.

Nanoparticle-filled polymers

A ceramic matrix nanocomposite having enhanced mechanical behavior is made up of a nanotube filler composed of at least one nanotube material, and a ceramic matrix composed of a nanocrystalline ceramic oxide. A method for producing ceramic articles having improved fracture toughness includes combining of a nanotube filler made up of a nanotube material and a ceramic matrix made up of a nanocrystalline ceramic oxide, forming an article therefrom, and sintering the article under elevated pressure at elevated temperature.

Ceramic matrix nanocomposites containing carbon nanotubes for enhanced mechanical behavior

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Menands, NY, United States of America

Richard W Siegel