Patents Assigned to Princeton University
  • Post-processing treatment of conductive polymers to enhance electrical conductivity
    Patent number: 8093098
    Abstract: A method for enhancing electrical conductivity of a film which includes at least one conductive polymer. The method includes providing the film comprising the at least one conductive polymer and at least one polymer acid, agitating the film in at least one reagent; and, placing the film on a heated surface. The at least one reagent includes a reagent acid that is stronger than the polymer acid. The conductivity of the treated film is significantly greater than the conductivity of the untreated film.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: January 10, 2012
    Assignees: The Trustees of Princeton University, The Board of Regents, the University of Texas System
    Inventors: Yueh-Lin Loo, Joung Eun Yoo, Kwang Seok Lee
  • Enhanced bonding layers on titanium materials
    Patent number: 8092585
    Abstract: The present invention provides a dense-coverage, adherent phosphorous-based coating on the native oxide surface of a material. Disclosed phosphorous-based coatings include phosphate and organo-phosphonate coatings. The present invention also provides further derivatization of the phosphorous-based coatings to yield dense surface coverage of chemically reactive coatings and osteoblast adhesion-promoting and proliferation-promoting coatings on the native oxide surface of a titanium material.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: January 10, 2012
    Assignee: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, Michael J. Avaltroni, Kim S. Midwood, Jean E. Schwarzbauer, Ellen Gawalt
  • Thermally exfoliated graphite oxide
    Patent number: 8066964
    Abstract: A modified graphite oxide material contains a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g, wherein the thermally exfoliated graphite oxide displays no signature of the original graphite and/or graphite oxide, as determined by X-ray diffraction.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: November 29, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'Homme, Ilhan A. Aksay, Ahmed Abdala
  • Quasicrystalline structures and uses thereof
    Patent number: 8064127
    Abstract: This invention relates generally to the field of quasicrystalline structures. In preferred embodiments, the stopgap structure is more spherically symmetric than periodic structures facilitating the formation of stopgaps in nearly all directions because of higher rotational symmetries. More particularly, the invention relates to the use of quasicrystalline structures for optical, mechanical, electrical and magnetic purposes. In some embodiments, the invention relates to manipulating, controlling, modulating and directing waves including electromagnetic, sound, spin, and surface waves, for a pre-selected range of wavelengths propagating in multiple directions.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: November 22, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Paul Joseph Steinhardt, Paul Michael Chaikin, Weining Man
  • Packaging material and flexible medical tubing containing thermally exfoliated graphite oxide
    Patent number: 8063134
    Abstract: A packaging material or flexible medical tubing containing a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 22, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'homme, Ilhan A. Aksay
  • Electrospray painted article containing thermally exfoliated graphite oxide and method for their manufacture
    Patent number: 8053508
    Abstract: A painted polymer part containing a conductive polymer composition containing at least one polymer and a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g, wherein the painted polymer part has been electrospray painted.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: November 8, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Sibel Korkut, Robert K. Prud'Homme, Ilhan A. Aksay
  • Emulsifier containing thermally exfoliated graphite oxide
    Patent number: 8048931
    Abstract: An emulsifier containing a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 1, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'Homme, Ilhan A. Aksay
  • Wire coating containing thermally exfoliated graphite oxide
    Patent number: 8048950
    Abstract: A wire coating containing a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 1, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'homme, Ilhan A. Aksay, Douglas Adamson, Ahmed Abdala
  • Conductive ink containing thermally exfoliated graphite oxide and method a conductive circuit using the same
    Patent number: 8048214
    Abstract: A conductive ink containing a conductive polymer, wherein the conductive polymer contains at least one polymer and a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g, and it use in a method for making a conductive circuit.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 1, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'Homme, Ilhan A. Aksay
  • Tire containing thermally exfoliated graphite oxide
    Patent number: 8047248
    Abstract: A tire, tire lining or inner tube, containing a polymer composite, made of at least one rubber and/or at least one elastomer and a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 1, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'homme, Ilhan A. Aksay
  • System and method for machine-assisted election auditing
    Patent number: 8033463
    Abstract: A method for auditing ballots cast in an election, wherein each ballot is associated with a group. A subset of groups from which sample ballots will be chosen is identified. An identifier is printed on each ballot in the subset. Each ballot has a different identifier than every other ballot in its group. A check is performed to determine whether the identifiers were printed correctly on the ballots. If so, a machine re-count of ballots in each group in the subset is performed and the results are compared to the initial tally of ballots associated with the group. If there is a mismatch, a further investigation is triggered. If there is a match, manual verification is performed on sample ballots from each group. The audit may begin prior to completion of voting from all precincts by estimating the number of samples that will be necessary.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: October 11, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Edward W. Felten, Joseph A. Calendrino, J. Alex Halderman
  • Phosphorescent OLED with interlayer
    Patent number: 8021763
    Abstract: The present invention relates to phosphorescent stacked OLEDs having an interlayer.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: September 20, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Hiroshi Kanno, Stephen Forrest
  • Single step gas phase flame synthesis method to produce sub-10 nanometer sized rare earth doped nanoparticles
    Patent number: 8017036
    Abstract: Methods for forming rare earth element doped oxide, oxyhalide and oxysulfide activated nanoparticles by the following method steps: (a) providing a precursor solution of a water- or alcohol-soluble host metal salt or host metalloid compound and one or more water- or alcohol-soluble rare earth element salts in a polar solution; (b) forming an aerosol of the precursor solution and oxygen; (c) feeding the aerosol to a heated Laval tube (d) igniting the aerosol with a reactive gas flame at the apex of the Laval tube to pyrolyze the salts; and (e) expanding and cooling the pyrolysis gases emerging from the Laval tube so that rare earth element doped nanoparticles precipitate therefrom; wherein one or more of the aerosol particle size, flow rate through the Laval tube and pyrolysis temperature are selected to provide a predetermined particle size and degree of crystallinity without particle aggregation.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: September 13, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert H. Austin, Shuang Fang Lim, Robert Riehn
  • Organic photovoltaic cells utilizing ultrathin sensitizing layer
    Patent number: 8013240
    Abstract: A photosensitive device includes a plurality of organic photoconductive materials disposed in a stack between a first electrode and a second electrode, including a first continuous layer of donor host material, a second continuous layer of acceptor host material, and at least one other organic photoconductive material disposed as a plurality of discontinuous islands between the first continuous layer and the second continuous layer. Each of these other photoconductive materials has an absorption spectra different from the donor host material and the acceptor host material. Preferably, each of the discontinuous islands consists essentially of a crystallite of the respective organic photoconductive material, and more preferably, the crystallites are nanocrystals.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: September 6, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Fan Yang, Barry P. Rand
  • Method and system for operating an atomic clock using a self-modulated laser with electrical modulation
    Patent number: 8009520
    Abstract: A polarization gain medium such as an emitting laser diode provides the optical pumping. An atomic vapor cell is positioned in the laser cavity providing spontaneous push-pull optical pumping inside the laser cavity. This causes the laser beam to be modulated at hyperfine-resonance frequency. A clock signal is obtained from electrical modulation across the laser diode.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: August 30, 2011
    Assignee: Princeton University
    Inventors: Yuan-Yu Jau, Kiyoshi Ishikawa, William Happer
  • Near infrared emitting organic compounds and organic devices using the same
    Patent number: 7989090
    Abstract: Certain iridium compounds which may comprise an iridium(III)-ligand complex having the general formula: (C^N)2—Ir—(N^N). (C^N) and (N^N) may each represent a ligand coordinated to an iridium atom. The iridium compounds may have a primary phosphorescent photoluminescence peak wavelength in the near-infrared (IR) range. Also, organic devices that use certain iridium compounds. The organic device may comprise an organic layer and the organic layer may comprise any of the iridium compounds disclosed herein. Also, organic devices that use certain metalloporphyrin compounds. The metalloporphyrin compounds may comprise a core porphyrin structure with four pyrrole rings. The metalloporphyrin compounds may have a primary phosphorescent photoluminescence peak wavelength in the near-IR range.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: August 2, 2011
    Assignees: The Trustees of Princeton University, The University of Southern California, The Regents of the University of Michigan
    Inventors: Mark E. Thompson, Carsten Borek, Kenneth Hanson, Peter Djurovich, Yiru Sun, Stephen Forrest, Arnold Tamayo
  • Method for continuous particle separation using obstacle arrays asymmetrically aligned to fields
    Patent number: 7988840
    Abstract: The present invention relates to methods and devices for separating particles according to size. More specifically, the present invention relates to a microfluidic method and device for the separation of particles according to size using an array comprising a network of gaps, wherein the field flux from each gap divides unequally into subsequent gaps. In one embodiment, the array comprises an ordered array of obstacles in a microfluidic channel, in which the obstacle array is asymmetric with respect to the direction of an applied field.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: August 2, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Lotien Richard Huang, James Christopher Sturm, Robert Hamilton Austin
  • MULTIFUNCTIONAL GRAPHENE-SILICONE ELASTOMER NANOCOMPOSITE, METHOD OF MAKING THE SAME, AND USES THEREOF
    Publication number: 20110178224
    Abstract: A nanocomposite composition having a silicone elastomer matrix having therein a filler loading of greater than 0.05 wt %, based on total nanocomposite weight, wherein the filler is functional graphene sheets (FGS) having a surface area of from 300 m2/g to 2630 m2/g; and a method for producing the nanocomposite and uses thereof.
    Type: Application
    Filed: November 12, 2010
    Publication date: July 21, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Shuyang Pan, Ilhan A. Aksay, Robert K. Prud'Homme
  • Organic photosensitive devices using subphthalocyanine compounds
    Patent number: 7973307
    Abstract: An organic photosensitive optoelectronic device, having a donor-acceptor heterojunction of a donor-like material and an acceptor-like material and methods of making such devices is provided. At least one of the donor-like material and the acceptor-like material includes a subphthalocyanine, a subporphyrin, and/or a subporphyrazine compound; and/or the device optionally has at least one of a blocking layer or a charge transport layer, where the blocking layer and/or the charge transport layer includes a subphthalocyanine, a subporphyrin, and/or a subporphyrazine compound.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: July 5, 2011
    Assignees: The Trustees of Princeton University, The Regents of the University of Michigan, The University of Southern California
    Inventors: Barry Rand, Stephen R. Forrest, Kristin L. Mutolo, Elizabeth Mayo, Mark E. Thompson
  • Phosphorescent organic light emitting devices
    Patent number: RE42561
    Abstract: An organic light emitting device structure having an organic light emitting device (OLED) over a substrate, where the OLED has, for example, an anode, a hole transporting layer (HTL), a first electron transporting layer (ETL) that is doped with a phosphorescent material, a second electron transporting layer (ETL), and a cathode. The OLEDs of the present invention are directed, in particular, to devices that include an emissive layer comprised of an electron transporting host material having a triplet excited state energy level that is higher than the emissive triplet excited state energy level of the phosphorescent dopant material.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: July 19, 2011
    Assignees: The University of Southern California, The Trustees of Princeton University
    Inventors: Chihaya Adachi, Marc A. Baldo, Stephen R. Forrest