Of Chemical Property Or Presence Patents (Class 977/957)
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Publication number: 20100201381Abstract: Devices, systems, and methods for detecting nucleic acid hybridization, including single nucleic base mutations at low concentrations, are disclosed, using surface-tethered hairpin loop oligonucleotide probes and metal-nanoparticles conjugated to a hybridization detection sequence that is capable of binding the stem region of the opened hairpin loop oligonucleotide probe, without the use of labeling or target modification and capable of recycling.Type: ApplicationFiled: February 8, 2010Publication date: August 12, 2010Inventors: Samir M. Iqbal, Swati Goyal, Shawn M. Christensen, Mohammud R. Noor
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Publication number: 20100178713Abstract: A substrate of a target substance-detecting element for detecting a target substance in a specimen based on localized surface plasmon resonance comprises a supporting member and a metal nano-dot group provided on the supporting member, metal nano-dots each of which is comprised in the metal nano-dot group and adjacent to each other are arranged with a gap between the metal nano-dots of not larger than 30 nm.Type: ApplicationFiled: January 17, 2007Publication date: July 15, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Satoru Nishiuma, Masaya Ogino
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Publication number: 20100155691Abstract: A gas sensor for detecting environmentally harmful gases is provided. The sensor includes an insulating substrate, a metal electrode formed on the insulating substrate, and a sensing layer formed on the metal electrode and including a semiconductor oxide (Lan+1NinO3n+1(n=1,2,3)) nanofiber. Therefore, a semiconductor oxide (Lan+1NinO3n+1(n=1,2,3)) has an ABO3-type basic crystalline structure and thus is stable in structure, and is a representative material having a nonstoichiometric composition due to oxygen defects. Since the semiconductor oxide has great oxygen defects on its surface, a great change in electrical resistance may be exhibited due to reactive gas adsorption and oxidation/reduction reaction on the oxide surface. Also, a method of fabricating the gas sensor is provided.Type: ApplicationFiled: August 6, 2009Publication date: June 24, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Su Jae LEE, Jin Ah Park, Jaehyun Moon, Tae Hyoung Zyung
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Publication number: 20100133119Abstract: The invention relates to electrodes for electrochemical analysis comprising: —an insulating surface; —carbon nanotubes situated on the insulating surface at a density of at least 0.1 ?mCNT Um?2; and—an electrically conducting material in electrical contact with the carbon nanotubes; wherein the carbon nanotubes cover an area of no more than about 5.0% of the insulating surface. Methods of making such electrodes and assay devices or kits with such electrodes, are also provided.Type: ApplicationFiled: August 1, 2008Publication date: June 3, 2010Inventors: Julie Victoria Macpherson, Patrick Robert Unwin, Mark Newton
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Publication number: 20100129925Abstract: A semiconductor nanowire is coated with a chemical coating layer that comprises a functional material which modulates the quantity of free charge carriers within the semiconductor nanowire. The outer surface of the chemical coating layer includes a chemical group that facilitates bonding with molecules to be detected through electrostatic forces. The bonding between the chemical coating layer and the molecules alters the electrical charge distribution in the chemical coating layer, which alters the amount of the free charge carriers and the conductivity in the semiconductor nanowire. The coated semiconductor nanowire may be employed as a chemical sensor for the type of chemicals that bonds with the functional material in the chemical coating layer. Detection of such chemicals may indicate pH of a solution, a vapor pressure of a reactive material in gas phase, and/or a concentration of a molecule in a solution.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Ali Afzali-Ardakani, Lidija Sekaric, George S. Tulevski
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Patent number: 7695609Abstract: The present invention is directed to systems and methods for detecting biological and chemical species in liquid and gaseous phase. The systems and methods utilize carbon nanotubes to enhance sensitivity and selectivity towards the reacting species by decreasing interference and detecting a wide range of concentrations.Type: GrantFiled: June 5, 2008Date of Patent: April 13, 2010Assignee: Applied Nanotech Holdings, Inc.Inventors: Prabhu Soundarrajan, James Novak
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Publication number: 20100088040Abstract: Chemical field effect sensors comprising nanotube field effect devices having biopolymers such as single stranded DNA or RNA functionally adsorbed to the nanotubes are provided. Also included are arrays comprising the sensors and methods of using the devices to detect volatile compounds.Type: ApplicationFiled: July 13, 2007Publication date: April 8, 2010Applicant: The Trustees of the University of PennsylvaniaInventor: Alan T. Johnson, JR.
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Publication number: 20100072080Abstract: Disclosed are methods and devices for biomolecular detection, comprising a nanopipette, exemplified as a hollow inert, non-biological structure with a conical tip opening of nanoscale dimensions, suitable for holding an electrolyte solution which may contain an analyte such as a protein biomolecule to be detected as it is passed through the tip opening. Biomolecules are detected by specific reaction withy peptide ligands chemically immobilized in the vicinity of the tip. Analytes which bind to the ligands cause a detectible change in ionic current. A sensitive detection circuit, using a feedback amplifier circuit, and alternating voltages is further disclosed. Detection of Il-10 at a concentration of 4 ng/nl is also disclosed, as is detection of VEGF.Type: ApplicationFiled: May 4, 2009Publication date: March 25, 2010Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Miloslav Karhanek, Chris D. Webb, Senkei Umehara, Nader Pourmand
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Publication number: 20100039126Abstract: A sensor system for detecting a chemical or biological species includes a sensing element and a bias and measurement circuit. The sensing element includes nanochannels, each having an outer surface functionalized to chemically interact with the species to create a corresponding surface potential, and each having a sufficiently small cross section to exhibit a shift of a differential conductance characteristic into a negative bias operating region by a shift amount dependent on the surface potential. The bias and measurement circuit applies a bias voltage across two ends of the nanochannels sufficiently negative to achieve a desired dependence of the differential conductance on the surface potential, wherein the dependence has a steeply sloped region of high amplification substantially greater than a reference amplification at a zero-bias condition, thus achieving relatively high signal-to-noise ratio.Type: ApplicationFiled: May 12, 2009Publication date: February 18, 2010Applicant: Trustees of Boston UniversityInventors: Yu Chen, Xihua Wang, Agniezska Kalinowski, Mi Hong, Pritiraj Mohanty, Shyamsunder Erramilli
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Publication number: 20100019226Abstract: The invention relates to a semiconductor sensor device (10) for sensing a substance comprising at least one nanowire (11) which is formed on a surface of a semiconductor body (12) and which is connected at a first end to a first electrically conducting connection region (13) and at a second end to’ a second electrically conducting connection region (14) while a fluid (20) comprising a substance (30) to be sensed can flow along the nanowire (11) and the substance (30) to be sensed can influence’ the electrical properties of the nanowire (11), wherein the nanowire (11) comprises viewed in a longitudinal direction subsequently a first semiconductor subregion (1) comprising a first semiconductor material and a second semiconductor subregion (2) comprising a second semiconductor material different from the first semiconductor material. According to the invention’ the first semiconductor material comprises a IV element material and the second semiconductor material comprises a III-V compound.Type: ApplicationFiled: September 17, 2007Publication date: January 28, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Meriman Nicoletta Kahya, Erik Petrus Antonius Maria Bakkers
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Publication number: 20090327188Abstract: At least one resonator is disclosed having a plurality of nanoscale resonator elements, the at least one resonator having at least two, different resonant frequencies and configured to provide at least two signals in response to an input signal and at least two adders configured to weight the signals with respective weights and to add weighted signals so as to produce an output signal.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Inventors: Tapani Ryhanen, Mark Welland
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Patent number: 7638036Abstract: Nanosensors for detecting analytes and methods of detecting analytes have been developed in which the redox potential of a redox effector in solution is altered thereby causing changes in carbon nanotube conductance. The analyte may be detected in solution, eliminating the need for immobilizing the analyte on a support.Type: GrantFiled: September 30, 2005Date of Patent: December 29, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Salah Boussaad, Bruce A. Diner, Janine Fan, Vsevolod Rostovtsev, Ajit Krishnan
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Patent number: 7635423Abstract: This invention relates to the field of nanotechnology. Specifically the invention describes a nanosensor for the detection of an analyte in which the redox potential in solution is altered thereby causing changes in carbon nanotube conductance.Type: GrantFiled: September 30, 2005Date of Patent: December 22, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Salah Boussaad, Bruce A. Diner, Janine Fan, Vsevolod Rostovtsev, Ajit Krishnan
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Patent number: 7623972Abstract: Methods and systems for determining if one or more target molecules are present in a gas, by exposing a functionalized carbon nanostructure (CNS) to the gas and measuring an electrical parameter value EPV(n) associated with each of N CNS sub-arrays. In a first embodiment, a most-probable concentration value C(opt) is estimated, and an error value, depending upon differences between the measured values EPV(n) and corresponding values EPV(n;C(opt)) is computed. If the error value is less than a first error threshold value, the system interprets this as indicating that the target molecule is present in a concentration C?C(opt). A second embodiment uses extensive statistical and vector space analysis to estimate target molecule concentration.Type: GrantFiled: October 31, 2006Date of Patent: November 24, 2009Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Jing Li, Meyya Meyyappan, Yijiang Lu
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Publication number: 20090286344Abstract: A method of making a sensor comprises substantially laterally growing at least one nanowire having at least two segments between two electrodes, whereby a junction or connection is formed between the at least two segments; and establishing a sensing material adjacent to the junction or connection, and adjacent to at least a portion of each of the at least two segments, wherein the sensing material has at least two states.Type: ApplicationFiled: July 27, 2009Publication date: November 19, 2009Inventors: Theodore I Kamins, Philip J. Kuekes, Carrie L. Donley, Jason J. Blackstock
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Patent number: 7608902Abstract: A nanowire composite and a method of preparing the nanowire composite comprise a template having a plurality of hollow channels, nanowires formed within the respective channels of the template, and a functional element formed by removing a portion of the template so that one or more of the nanowires formed within the portion of the template are exposed. Since the nanowire composite can be prepared in a simple manner at low costs and can be miniaturized, the nanowire composite finds application in resonators and a variety of sensors.Type: GrantFiled: May 26, 2006Date of Patent: October 27, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Soon Jae Kwon, Byoung Lyong Choi, Eun Kyung Lee, Kyung Sang Cho, In Taek Han, Jae Ho Lee, Seong Jae Choi
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Patent number: 7597788Abstract: A gas sensing mechanism and a gas sensor based on a semiconducting carbon nanotube diode structure are disclosed. The gas sensor operates by detecting the change in conductivity characteristic of the current vs. voltage behavior of an I—N, or I—P junction, in the carbon nanotube. In the presence of electrophilic gas species at the I—N junction, or nucleophilic gas species at the I—P junction, a P—N, or N—P, junction is created by doping of the carbon nanotube by the respective gas species. The resulting change from the undoped, instrinsic i-type to p-type, or n-type, creates a diode structure whose conductivity characteristics can be measured with high accuracy and selectivity.Type: GrantFiled: July 20, 2005Date of Patent: October 6, 2009Assignee: Applied Nanotech Holdings, Inc.Inventors: Thomas Visel, Prabhu Soundarrajan
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Publication number: 20090242416Abstract: The present invention relates to a nanowire sensor and method for forming the same. More specifically, the nanowire sensor comprises at least one nanowire formed on a substrate, with a sensor receptor disposed on a surface of the nanowire, thereby forming a receptor-coated nanowire. The nanowire sensor can be arranged as a sensor sub-unit comprising a plurality of homogeneously receptor-coated nanowires. A plurality of sensor subunits can be formed to collectively comprise a nanowire sensor array. Each sensor subunit in the nanowire sensor array can be formed to sense a different stimulus, allowing a user to sense a plurality of stimuli. Additionally, each sensor subunit can be formed to sense the same stimuli through different aspects of the stimulus. The sensor array is fabricated through a variety of techniques, such as by creating nanopores on a substrate and electrodepositing nanowires within the nanopores.Type: ApplicationFiled: May 29, 2009Publication date: October 1, 2009Inventors: Minhee Yun, Nosang Myung, Richard Vasquez, Margie L. Homer, Margaret A. Ryan, Shiao-Pin Yen, Jean-Pierre Fleurial, Ratnakumar Bugga, Daniel Choi, William Goddard, Abhijit Shevade, Mario Blanco, Tahir Cagin, Wely Floriano
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Publication number: 20090216461Abstract: A method and system of monitoring for chemical or other toxic agents includes operating a plurality of first type sensors having a first level of sensitivity to an agent in a monitored area. Concurrently a second type sensor is operated having a second level of sensitivity to the agent in the monitored area, where the second level of sensitivity is at least ten times more sensitive than the first level of sensitivity. Input from the plurality of first type sensors and the second type sensor is received and analyzed, at a central location, in order to determine the presence of the agent in the monitored area.Type: ApplicationFiled: December 29, 2008Publication date: August 27, 2009Inventors: Steven A. Sunshine, Timothy E. Burch
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Patent number: 7575933Abstract: An electronic system for selectively detecting and identifying a plurality of chemical species, which comprises an array of nanostructure sensing devices, is disclosed. Within the array, there are at least two different selectivities for sensing among the nanostructure sensing devices. Methods for fabricating the electronic system are also disclosed. The methods involve modifying nanostructures within the devices to have different selectivity for sensing chemical species. Modification can involve chemical, electrochemical, and self-limiting point defect reactions. Reactants for these reactions can be supplied using a bath method or a chemical jet method. Methods for using the arrays of nanostructure sensing devices to detect and identify a plurality of chemical species are also provided.Type: GrantFiled: May 27, 2005Date of Patent: August 18, 2009Assignee: Nanomix, Inc.Inventors: Jean-Christophe P. Gabriel, Philip G. Collins, Keith Bradley, George Gruner
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Patent number: 7545010Abstract: The invention provides a nanostructure including nanowires having very small diameters and integrated at a high density, and capable of being applied to still further high-functional devices. The invention provides a structure including a substrate or substrate having an underlayer, and a structure formed on the substrate or substrate having an underlayer, wherein the structure includes a columnar first part (part) and a second part (part) formed to surround the first part, and the second part comprises two or more types of materials capable of forming eutectic crystals, one type of the materials is a semiconductor material, and the height of the first part from the substrate is greater than the height of the second part from the substrate.Type: GrantFiled: August 6, 2004Date of Patent: June 9, 2009Assignee: Canon Kabushiki KaishaInventors: Shigeru Ichihara, Kaoru Konakahara, Tohru Den, Kazuhiko Fukutani
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Publication number: 20090084673Abstract: There is described a gas sensor element 1 including a solid electrolyte body 11, insulators 15, 141, 142, 197, 161, 162, 163, 164, 165, and a pair of electrodes 121, 131 formed such that the solid electrolyte body 11 is held therebetween. The gas sensor element 1 satisfies the following requirement (a) and/or the requirement (b). (a) The solid electrolyte body 11 is made of ion-conductive composite material in which nanoparticles with specific particle diameters are dispersed in ion-conductive ceramics. (b) The insulators 15, 141, 197, 161, 162, 163, 164, 165 are made of insulative composite material in which nanoparticles with specific particle diameters are dispersed in insulative ceramics. Further, there is described a manufacturing method of a gas sensor element in which the particle diameter and dispersion quantity of the nanoparticles dispersed in the solid electrolyte body 11 and/or insulative ceramics 11 are controlled.Type: ApplicationFiled: June 29, 2006Publication date: April 2, 2009Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Itsuhei Ogata, Daisuke Makino, Satoshi Nakamura, Hiroo Imamura, Akio Tanaka
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Patent number: 7481912Abstract: A pair of measuring electrodes comprising a first and a second, preferably in each case sheet-like electrode comprises an insulation layer arranged between said electrodes. One or more nanopores, which extend through said insulation layer as far as said first electrode, the surface of which is at least partially uncovered by said nanopores, are provided in each second electrode. The invention also describes a biosensor comprising a pair of measuring electrodes of this type, an electrochemical cell comprising a biosensor of this type and a process for producing said pair of measuring electrodes.Type: GrantFiled: October 16, 2003Date of Patent: January 27, 2009Assignee: NMI Naturwissenschaftliches und Medizinisches Institut an der Universität TuebingenInventors: Martin Stelzle, Wilfried Nisch
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Patent number: 7452452Abstract: The present invention relates to microelectode arrays (MEAs), and more particularly to carbon nanotube nanoelectrode arrays (CNT-NEAs) for chemical and biological sensing, and methods of use.Type: GrantFiled: December 20, 2004Date of Patent: November 18, 2008Assignee: The Trustees of Boston CollegeInventors: Zhifeng Ren, Yuehe Lin, Wassana Yantasee, Guodong Liu, Fang Lu, Yi Tu
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Patent number: 7439562Abstract: The present invention concerns a method for modyfing at least an electronic property of a carbon nanotube or nanowire comprising exposing said nanotube or nanowire to an acid having the formula (I) wherein R1, R2 and R3 are chosen in the group comprising (H, F, Cl, Br, I) with at least one of R1, R2 and R3 being different from H. At least part of the nanotube or nanowire may be a channel region of a field effect transistor.Type: GrantFiled: April 22, 2003Date of Patent: October 21, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Stéphane Auvray, Jean-Philippe Bourgoin, Vincent Derycke, Marcelo Goffman
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Publication number: 20080218740Abstract: Embodiments of the present invention are related to nanowire-based devices that can be configured and operated as modulators, chemical sensors, and light-detection devices. In one aspect, a nanowire-based device includes a reflective member, a resonant cavity surrounded by at least a portion of the reflective member, and at least one nanowire disposed within the resonant cavity. The nanowire includes at least one active segment selectively disposed along the length of the nanowire to substantially coincide with at least one antinode of light resonating within the cavity. The active segment can be configured to interact with the light resonating within the cavity.Type: ApplicationFiled: February 29, 2008Publication date: September 11, 2008Inventors: R. Stanley Williams, Shih-Yuan Wang, Philip J. Kuekes, Theodore I. Kamins, Duncan Stewart, Alexandre M. Bratkovski, Jason Blackstock, Zhiyong Li
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Patent number: 7388200Abstract: A sensing method includes exposing a nano-transducer having a controlled surface to a sample including at least one species. Adsorption of the species on the nano-transducer is transduced to a measurable signal as a function of time. Desorption of the species from the nano-transducer is also transduced to a measurable signal as a function of time. A residence time of the at least one species adsorbed on the nano-transducer is extracted from the measurable signals. The adsorption and desorption each define an individual measurable event.Type: GrantFiled: October 19, 2006Date of Patent: June 17, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: Duncan R. Stewart, William M. Tong, R. Stanley Williams, Philip J. Kuekes, Sean Xiao-an Zhang, Kevin F. Peters, Kenneth J. Ward
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Publication number: 20080078234Abstract: The present invention provides for variable-range hydrogen sensors and methods for making same. Such variable-range hydrogen sensors comprise a series of fabricated Pd—Ag (palladium-silver) nanowires—each wire of the series having a different Ag to Pd ratio—with nanobreakjunctions in them and wherein the nanowires have predefined dimensions and orientation. When the nanowires are exposed to H2, their lattace swells when the H2 concentration reaches a threshold value (unique to that particular ratio of Pd to Ag). This causes the nanobreakjunctions to close leading to a 6-8 orders of magnitude decrease in the resistance along the length of the wire and providing a sensing mechanism for a range of hydrogen concentrations.Type: ApplicationFiled: July 14, 2006Publication date: April 3, 2008Applicant: Nano-Proprietary, Inc.Inventors: Greg Monty, Kwok Ng, Mohshi Yang
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Patent number: 7335526Abstract: A ChemFET Sensing system is Described.Type: GrantFiled: October 31, 2005Date of Patent: February 26, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kevin F Peters, Xiaofeng Yang
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Publication number: 20080034842Abstract: A gas sensor includes a substrate having a plurality of through holes, a pair of electrodes disposed on the substrate, wherein the plurality of through holes are disposed between the pair of electrodes and a plurality of carbon nanotubes covering at least a portion of the plurality of through holes, wherein at least a portion of the plurality of carbon nanotubes is connected with the pair of electrodes.Type: ApplicationFiled: April 3, 2007Publication date: February 14, 2008Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Soo-suk LEE, Sung-ouk JUNG, Hun-joo LEE, In-ho LEE, Kyu-tae YOO, Jae-ho KIM
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Patent number: 7312095Abstract: An electronic system for selectively detecting and identifying a plurality of chemical species, which comprises an array of nanostructure sensing devices, is disclosed. Within the array, there are at least two different selectivities for sensing among the nanostructure sensing devices. Methods for fabricating the electronic system are also disclosed. The methods involve modifying nanostructures within the devices to have different selectivity for sensing chemical species. Modification can involve chemical, electrochemical, and self-limiting point defect reactions. Reactants for these reactions can be supplied using a bath method or a chemical jet method. Methods for using the arrays of nanostructure sensing devices to detect and identify a plurality of chemical species are also provided.Type: GrantFiled: March 15, 2002Date of Patent: December 25, 2007Assignee: Nanomix, Inc.Inventors: Jean-Christophe P. Gabriel, Philip G. Collins, Keith Bradley, George Gruner
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Patent number: 7267797Abstract: A system and method for detecting changes in the refractive index of a fluid in a small test volume. A change in the refractive index can indicate a change in the chemical composition of the fluid. The test volume has a depth comparable to or less than the wavelength of incident light. In one embodiment, an internal surface of the volume is coated with a binding partner selected to bind with a targeted molecule. When the targeted molecule binds to the binding partner, the optical properties of the system change. The refractive index is determined by illuminating the test volume with laser light and measuring transmitted or reflected light.Type: GrantFiled: November 7, 2001Date of Patent: September 11, 2007Assignee: Cornell Research Foundation, Inc.Inventors: Harold G. Craighead, Jun Kameoka
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Patent number: 7258838Abstract: A solid state nanopore device including two or more materials and a method for fabricating the same. The device includes a solid state insulating membrane having an exposed surface, a conductive material disposed on at least a portion of the exposed surface of the solid state membrane, and a nanopore penetrating an area of the conductive material and at least a portion of the solid state membrane. During fabrication a conductive material is applied on a portion of a solid state membrane surface, and a nanopore of a first diameter is formed. When the surface is exposed to an ion beam, material from the membrane and conductive material flows to reduce the diameter of the nanopore. A method for evaluating a polymer molecule using the solid state nanopore device is also described. The device is contacted with the polymer molecule and the molecule is passed through the nanopore, allowing each monomer of the polymer molecule to be monitored.Type: GrantFiled: February 14, 2003Date of Patent: August 21, 2007Assignee: President and Fellows of Harvard CollegeInventors: Jiali Li, Derek M. Stein, Gregor M. Schurmann, Gavin M. King, Jene Golovchenko, Daniel Branton, Michael Aziz
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Patent number: 7226530Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: GrantFiled: December 11, 2003Date of Patent: June 5, 2007Assignees: The Aerospace Corporation, Regents of the University of CaliforniaInventors: Bruce H. Weiller, Shabnam Virji, Richard B. Kaner, Jiaxing Huang
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Patent number: 7141210Abstract: A nanocalorimeter array for detecting chemical reactions includes at least one thermal isolation region residing on a substrate. Each thermal isolation region includes at least one thermal equilibration region, within which resides a thermal measurement device connected to detection electronics.Type: GrantFiled: April 1, 2002Date of Patent: November 28, 2006Assignee: Palo Alto Research Center IncorporatedInventors: Alan G. Bell, Richard H. Bruce, Scott A. Elrod, Eric Peeters, Francisco E. Torres
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Patent number: 7129554Abstract: Electrical devices comprised of nanoscopic wires are described, along with methods of their manufacture and use. The nanoscopic wires can be nanotubes, preferably single-walled carbon nanotubes. They can be arranged in crossbar arrays using chemically patterned surfaces for direction, via chemical vapor deposition. Chemical vapor deposition also can be used to form nanotubes in arrays in the presence of directing electric fields, optionally in combination with self-assembled monolayer patterns. Bistable devices are described.Type: GrantFiled: December 11, 2001Date of Patent: October 31, 2006Assignee: President & Fellows of Harvard CollegeInventors: Charles M. Lieber, Hongkun Park, Qingqiao Wei, Yi Cui, Wenjie Liang