Patents Assigned to RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
  • Patent number: 9136794
    Abstract: An apparatus, system, and method are disclosed for modulating electric current. An electron source electrode provides a flow of electrons in a partial vacuum environment. An ionizable gas in the partial vacuum environment forms positively charged ion particles in response to impact with the electrons from the electron source electrode. Application of a bias voltage differential between a first bias electrode and a second bias electrode in the partial vacuum environment forms an electric field gradient in a path of the flow of electrons. A collector electrode in the partial vacuum environment collects more electrons than ion particles when a collector electrode input voltage is above a threshold, and collects more ion particles than electrons when the collector electrode input voltage is below the threshold.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: September 15, 2015
    Assignee: Research Triangle Institute, International
    Inventors: Brian Stoner, Jeffrey Piascik
  • Publication number: 20140104013
    Abstract: An apparatus, system, and method are disclosed for modulating electric current. An electron source electrode 202 provides a flow of electrons in a partial vacuum environment 116. An ionizable gas 118 in the partial vacuum environment 116 forms positively charged ion particles in response to impact with the electrons from the electron source electrode 202. Application of a bias voltage differential between a first bias electrode 204 and a second bias electrode 206 in the partial vacuum environment 116 forms an electric field gradient in a path of the flow of electrons. A collector electrode 208 in the partial vacuum environment 116 collects more electrons than ion particles when a collector electrode input voltage 106 is above a threshold, and collects more ion particles than electrons when the collector electrode input voltage 106 is below the threshold.
    Type: Application
    Filed: June 21, 2012
    Publication date: April 17, 2014
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: Brian Stoner, Jeffrey Piascik
  • Publication number: 20140080729
    Abstract: An optical sensing device and associated apparatus are configured for multiplexed detection of specific analytes in fluid samples. The device has a wavelength-tunable grating-coupler configuration in which a grating is disposed on a surface of a waveguide. Different regions of the grating may be functionalized with different receptors, and may form binding-specific sensors and reference sensors. The receptors are exposed to a fluid sample utilizing a fluidic structure mounted to the device. The device utilizes evanescent waves to sense analytes bound to the waveguide surface. The evanescent wave is sensitive to changes in refractive index at (or near) the waveguide surface. Changes in refractive index occur proportionally to the mass of the bound analyte. The apparatus utilizes a tunable light source to implement swept wavelength interrogation while the input beam is held at a fixed coupling angle relative to the waveguide and grating.
    Type: Application
    Filed: March 16, 2012
    Publication date: March 20, 2014
    Applicant: Research Triangle Institute, International
    Inventors: Sonia Grego, Kristin Hedgepath Gilchrist
  • Publication number: 20140042753
    Abstract: An energy management system includes an energy storage reservoir and a fluid pump. The reservoir includes a fluid reservoir configured to contain varying quantities of a fluid and to isolate the fluid from the ambient. The fluid reservoir has a top surface, bottom surface, flexible member, and at least one opening for filling or emptying the reservoir. A pressing mass of solid material is positioned above the fluid reservoir with a weight sufficient to press the reservoir and empty the reservoir of fluid when the reservoir opening is open. The pressing mass is supported by the fluid reservoir when the reservoir contains fluid and is closed. The flexible member is disposed around the fluid reservoir to seal the fluid and to facilitate vertical motion of the pressing mass as the reservoir is filled and emptied. The pump supplies fluid to the fluid reservoir via the opening.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 13, 2014
    Applicant: Research Triangle Institute, International
    Inventors: Mark Bahner, Scott H. Goodwin
  • Publication number: 20130241435
    Abstract: A lighting device (100) includes a housing (104), a light converter (136), one or more light sources (132), and one or more optical waveguides (160). The housing includes a light exit (124) for outputting a combination of primary light (140) and secondary light (156,158). The light source emits a primary light beam of a primary wavelength. The optical waveguide includes an input end (162) optically coupled to the light source, and an output end (164) facing a housing interior (108) and positioned at an angle to an axial direction through the housing interior. The optical waveguide directs the primary light beam from the light source, through the housing interior and toward a luminescent material of the light converter. The luminescent material emits secondary light of one or more wavelengths different from the primary wavelength in response to excitation by the primary light beam. The light source may be mounted outside the housing interior so as not to obstruct light propagation.
    Type: Application
    Filed: August 19, 2011
    Publication date: September 19, 2013
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: Michael Kasper Lamvik, James Lynn Davis, Brent Thomas Ward
  • Publication number: 20130215598
    Abstract: A photoluminescent nanofiber composite includes a nanofiber substrate, first luminescent particles, and second luminescent particles. The first luminescent particles are supported by the nanofibers and span at least a portion of a substrate surface, as a layer on the substrate surface, or with some particles located in a bulk of the substrate, or both. The second luminescent particles are disposed on the substrate. The second luminescent particles may be disposed directly on the substrate surface or on the first luminescent particles. The second luminescent particles may be deposited in a pattern of deposition units. The first and second luminescent particles are configured for emitting light of different respective wavelengths in response to excitation by a light beam. One or more surface treatment coatings may be provided at different locations.
    Type: Application
    Filed: August 19, 2011
    Publication date: August 22, 2013
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: Kimberly A. Guzan, Karmann C. Mills, Li Han, James Lynn Davis, Paul G. Hoertz
  • Publication number: 20130215597
    Abstract: A lighting device (100) includes a housing (104) enclosing a housing interior (108), a light source (132), a light converter (136), and a color tuning device. The light source is configured for emitting a primary light beam of a primary wavelength (140) through the housing interior. The light converter includes a luminescent material (144) facing the housing interior and configured for emitting secondary light (156, 158) of one or more wavelengths different from the primary wavelength, in response to excitation by the primary light beam. The housing includes a light exit (124) for outputting a combination of primary light and secondary light. The color tuning device is configured for adjusting a position of the primary light beam relative to the luminescent material.
    Type: Application
    Filed: August 19, 2011
    Publication date: August 22, 2013
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventor: James Lynn Davis
  • Publication number: 20130215599
    Abstract: A lighting device may include a housing interior, a light exit, a light source, and a light converter. Output light is outputted from the light exit by emitting primary light from the light source. In response, the light converter emits secondary light of one or more wavelengths different than the primary wavelength, and the output light includes a combination of the primary light and the secondary light. The color of the output light may be tuned by adjusting a color parameter of the output light. The adjustment includes adding a color tuning material at a location in the housing interior where primary light is incident on the color tuning material. The color tuning material is configured for emitting auxiliary light in response to the incident primary light. Subsequently, the lighting device produces color-tuned output light that includes a combination of the primary light, the secondary light and the auxiliary light.
    Type: Application
    Filed: August 19, 2011
    Publication date: August 22, 2013
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: James Lynn Davis, Kimberly A. Guzan
  • Publication number: 20130034122
    Abstract: A temperature sensor includes a photon source, a fluorescent element and a photodetector. The fluorescent element includes a temperature-insensitive first fluorophore and a temperature-sensitive second fluorophore. The photodetector includes a first photosensor exhibiting a first spectral responsivity and a second photosensor exhibiting a second spectral responsivity. The first fluorophore may be selected to optimize the first spectral responsivity and the second fluorophore may be selected to optimize the second spectral responsivity. To measure a temperature of a surface, the fluorescent element may be placed adjacent to the surface and irradiated with a photon beam. First photons emitted from the first fluorophore and second photons emitted from the second fluorophore are collected.
    Type: Application
    Filed: October 5, 2012
    Publication date: February 7, 2013
    Applicant: Research Triangle Institute, International
    Inventor: Research Triangle Institute, International
  • Publication number: 20120241723
    Abstract: An optoelectronic device includes a first electrode, a quantum dot layer disposed on the first electrode including a plurality of quantum dots, a fullerene layer disposed directly on the quantum dot layer wherein the quantum dot layer and the fullerene layer form an electronic heterojunction, and a second electrode disposed on the fullerene layer. The device may include an electron blocking layer. The quantum dot layer may be modified by a chemical treatment to exhibit in creased charge carrier mobility.
    Type: Application
    Filed: September 29, 2010
    Publication date: September 27, 2012
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: Ethan Klem, John Lewis
  • Publication number: 20120223291
    Abstract: A photodetector includes one or more photodiodes and a signal processing circuit. Each photodiode includes a transparent first electrode, a second electrode, and a heterojunction interposed between the first electrode and the second electrode. Each heterojunction includes a quantum dot layer and a fullerene layer disposed directly on the quantum dot layer. The signal processing circuit is in signal communication each the second electrode. The photodetector may be responsive to wavelengths in the infrared, visible, and/or ultraviolet ranges. The quantum dot layer may be treated with a chemistry that increases the charge carrier mobility of the quantum dot layer.
    Type: Application
    Filed: September 29, 2010
    Publication date: September 6, 2012
    Applicant: RESEARCH TRIANGLE INSTITUTE, INTERNATIONAL
    Inventors: Ethan Klem, John Lewis