Patents by Inventor Ali Afzali Ardakani

Ali Afzali Ardakani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Field effect transistor-based bio-sensor
    Patent number: 9110014
    Abstract: An apparatus comprises: a sensing element formed on a buried oxide layer of a substrate and providing communication between a source region and a drain region; a gate dielectric layer on the sensing element, the gate dielectric layer defining a sensing surface on the sensing element; a passive surface surrounding the sensing surface; and a compound bound to the sensing surface and not bound to the passive surface, the compound having a ligand specifically configured to preferentially bind a target molecule to be sensed. An electrolyte solution in contact with the sensing surface and the passive surface forms a top gate of the apparatus.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: August 18, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Christopher P. D'Emic, Ashish Jagtiani, Sufi Zafar
  • N-dopant for carbon nanotubes and graphene
    Patent number: 9105853
    Abstract: A composition and method for forming a field effect transistor with a stable n-doped nano-component. The method includes forming a gate dielectric on a gate, forming a channel comprising a nano-component on the gate dielectric, forming a source over a first region of the nano-component, forming a drain over a second region of the nano-component to form a field effect transistor, and exposing a portion of a nano-component of a field effect transistor to dihydrotetraazapentacene, wherein dihydrotetraazapentacene is represented by the formula: wherein each of R1, R2, R3, and R4 comprises one of hydrogen, an alkyl group of C1 to C16 carbons, an alkoxy group, an alkylthio group, a trialkylsilane group, a hydroxymethyl group, a carboxylic acid group and a carboxylic ester group.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: August 11, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Bhupesh Chandra, George Stojan Tulevski
  • Carbon based biosensors and processes of manufacturing the same
    Patent number: 9103776
    Abstract: Sensors, processes for manufacturing the sensors, and processes of detecting a target molecule with the sensor generally includes a substrate including a channel and first and second electrodes electrically connected to the channel, wherein the channel includes a monolayer of surface functionalized graphene or surface functionalized carbon nanotubes, wherein the surface functionalized graphene or surface functionalized carbon nanotubes include an imidazolidone compound.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: August 11, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Shu-Jen Han
  • Forming patterned graphene layers
    Patent number: 9102118
    Abstract: An apparatus and method for forming a patterned graphene layer on a substrate. One such method includes forming at least one patterned structure of a carbide-forming metal or metal-containing alloy on a substrate, applying a layer of graphene on top of the at least one patterned structure of a carbide-forming metal or metal-containing alloy on the substrate, heating the layer of graphene on top of the at least one patterned structure of a carbide-forming metal or metal-containing alloy in an environment to remove graphene regions proximate to the at least one patterned structure of a carbide-forming metal or metal-containing alloy, and removing the at least one patterned structure of a carbide-forming metal or metal-containing alloy to produce a patterned graphene layer on the substrate, wherein the patterned graphene layer on the substrate provides carrier mobility for electronic devices.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: August 11, 2015
    Assignees: International Business Machines Corporation, Egypt Nanotechnology Center (EGNC)
    Inventors: Ali Afzali-Ardakani, Ahmed Maarouf, Glenn J. Martyna, Katherine Saenger
  • Graphene nanomesh based charge sensor
    Patent number: 9102540
    Abstract: A graphene nanomesh based charge sensor and method for producing a graphene nanomesh based charge sensor. The method includes generating multiple holes in graphene in a periodic way to create a graphene nanomesh with a patterned array of multiple holes, passivating an edge of each of the multiple holes of the graphene nanomesh to allow for functionalization of the graphene nanomesh, and functionalizing the passivated edge of each of the multiple holes of the graphene nanomesh with a chemical compound that facilitates chemical binding of a receptor of a target molecule to the edge of one or more of the multiple holes, allowing the target molecule to bind to the receptor, causing a charge to be transferred to the graphene nanomesh to produce a graphene nanomesh based charge sensor for the target molecule.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: August 11, 2015
    Assignees: International Business Machines Corporation, Egypt Nanotechnology Center (EGNC)
    Inventors: Ali Afzali-Ardakani, Shu-jen Han, Amal Kasry, Ahmed Maarouf, Glenn J. Martyna, Razvan Nistor, Hsinyu Tsai
  • Determination of isoelectric points of biomolecules using capacitive sensors
    Patent number: 9103770
    Abstract: A mechanism is provided for determining an isoelectric point of a molecule. A first group of capacitance versus voltage curves of a capacitor is measured. The capacitor includes a substrate, dielectric layer, and conductive solution. The first group of curves is measured for pH values of the solution without the molecule bound to a functionalized material on the dielectric layer of the capacitor. A second group of capacitance versus voltage curves of the capacitor is measured when the molecule is present in the solution, where the molecule is bound to the functionalized material of the dielectric layer of the capacitor. A shift is determined in the second group of curves from the first group of curves at each pH value. The isoelectric point of the molecule is determined by extrapolating a pH value corresponding to a shift voltage being zero, when the shift is compared to the pH values.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: August 11, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Christopher P. D'Emic, Ashish Jagtiani, Sufi Zafar
  • Carbon based biosensors and processes of manufacturing the same
    Patent number: 9097658
    Abstract: Sensors, processes for manufacturing the sensors, and processes of detecting a target molecule with the sensor generally includes a substrate including a channel and first and second electrodes electrically connected to the channel, wherein the channel includes a monolayer of surface functionalized graphene or surface functionalized carbon nanotubes, wherein the surface functionalized graphene or surface functionalized carbon nanotubes include an imidazolidone compound.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: August 4, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Shu-Jen Han
  • Carbon based biosensors and processes of manufacturing the same
    Patent number: 9091648
    Abstract: Sensors, processes for manufacturing the sensors, and processes of detecting a target molecule with the sensor generally includes a substrate including a channel and first and second electrodes electrically connected to the channel, wherein the channel includes a monolayer of surface functionalized graphene or surface functionalized carbon nanotubes, wherein the surface functionalized graphene or surface functionalized carbon nanotubes include an imidazolidone compound.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 28, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Shu-Jen Han
  • Silicon-based electronics with disabling feature
    Patent number: 9087851
    Abstract: Silicon-based circuitry is dissolved or otherwise disabled in a controlled manner by reactive materials provided beneath the insulating layer on which the circuitry is formed. Heat and/or light induced acid generating materials are provided for corroding one or more circuitry components. Additionally and/or alternatively, gas-producing materials are deposited in compartments beneath the insulating layer. The gas-producing materials cause pressure to rise within the compartments, damaging the chip. Chemical reactions within the chip may be facilitated by heating elements and/or light generating elements embedded within the chip and actuated by triggering circuits.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: July 21, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Bahman Hekmatshoartabari, Ali Khakifirooz, Davood Shahrjerdi
  • Method for manufacturing silicon-based electronics with disabling feature
    Patent number: 9087852
    Abstract: Silicon-based circuitry is dissolved or otherwise disabled in a controlled manner by reactive materials provided beneath the insulating layer on which the circuitry is formed. Heat and/or light induced acid generating materials are provided for corroding one or more circuitry components. Additionally and/or alternatively, gas-producing materials are deposited in compartments beneath the insulating layer. The gas-producing materials cause pressure to rise within the compartments, damaging the chip. Chemical reactions within the chip may be facilitated by heating elements and/or light generating elements embedded within the chip and actuated by triggering circuits.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: July 21, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Bahman Hekmatshoartabari, Ali Khakifirooz, Davood Shahrjerdi
  • DNA SEQUENCING USING MULTIPLE METAL LAYER STRUCTURE WITH DIFFERENT ORGANIC COATINGS FORMING DIFFERENT TRANSIENT BONDINGS TO DNA
    Publication number: 20150160159
    Abstract: A nanodevice includes a reservoir filled with conductive fluid and a membrane separating the reservoir. A nanopore is formed through the membrane having electrode layers separated by insulating layers. A certain electrode layer has a first type of organic coating and a pair of electrode layers has a second type. The first type of organic coating forms a motion control transient bond to a molecule in the nanopore for motion control, and the second type forms first and second transient bonds to different bonding sites of a base of the molecule. When a voltage is applied to the pair of electrode layers a tunneling current is generated by the base in the nanopore, and the tunneling current travels via the first and second transient bonds formed to be measured as a current signature for distinguishing the base. The motion control transient bond is stronger than first and second transient bonds.
    Type: Application
    Filed: February 18, 2015
    Publication date: June 11, 2015
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Hongbo Peng, Stephen M. Rossnagel, Ajay K. Royyuru, Gustavo A. Stolovitzky, Philip S. Waggoner
  • Optical latch and synaptic switch
    Patent number: 9041079
    Abstract: An optoelectronic device may include an insulating substrate, a semiconductor channel region located on the insulating substrate, and a source region and a drain region in contact with the semiconductor channel region. A photoswitchable material may be located on the semiconductor channel region between the source region and the drain region, such that the photoswitchable material includes a first structural state based on being exposed to a first optical wavelength, and includes a second structural state based on being exposed to a second optical wavelength. The first structural state causes a first electrical current to flow between the source region and the drain region, while the second structural state causes a second electrical current to flow between the source region and the drain region.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 26, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Tze-Chiang Chen, Bahman Hekmatshoartabari
  • FIELD EFFECT TRANSISTOR-BASED BIO-SENSOR
    Publication number: 20150137191
    Abstract: An apparatus comprises: a sensing element formed on a buried oxide layer of a substrate and providing communication between a source region and a drain region; a gate dielectric layer on the sensing element, the gate dielectric layer defining a sensing surface on the sensing element; a passive surface surrounding the sensing surface; and a compound bound to the sensing surface and not bound to the passive surface, the compound having a ligand specifically configured to preferentially bind a target molecule to be sensed. An electrolyte solution in contact with the sensing surface and the passive surface forms a top gate of the apparatus.
    Type: Application
    Filed: December 12, 2014
    Publication date: May 21, 2015
    Inventors: Ali Afzali-Ardakani, Christopher P. D'Emic, Ashish Jagtiani, Sufi Zafar
  • Doped carbon nanotubes and transparent conducting films containing the same
    Patent number: 9017813
    Abstract: Transparent conducting electrodes include a doped single walled carbon nanotube film and methods for forming the doped single walled carbon nanotube (SWCNT) by solution processing. The method generally includes depositing single walled carbon nanotubes dispersed in a solvent and a surfactant onto a substrate to form a single walled carbon nanotube film thereon; removing all of the surfactant from the carbon nanotube film; and exposing the single walled carbon nanotube film to a single electron oxidant in a solution such that one electron is transferred from the single walled carbon nanotubes to each molecule of the single electron oxidant.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: April 28, 2015
    Assignees: International Business Machines Corporation, Egypt Nanotechnology Center
    Inventors: Mostafa M. El-Ashry, Ali Afzali-Ardakani, Bhupesh Chandra, George S. Tulevski
  • GATE TUNABLE TUNNEL DIODE
    Publication number: 20150102289
    Abstract: A gate tunable diode is provided. The gate tunable diode includes a gate dielectric formed on a gate electrode and a graphene electrode formed on the gate dielectric. Also, the gate tunable diode includes a tunnel dielectric formed on the graphene electrode and a tunnel electrode formed on the tunnel dielectric.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 16, 2015
    Inventors: Ali Afzali-Ardakani, Damon Farmer
  • Field effect transistor-based bio-sensor
    Patent number: 8999739
    Abstract: An apparatus comprises: a sensing element formed on a buried oxide layer of a substrate and providing communication between a source region and a drain region; a gate dielectric layer on the sensing element, the gate dielectric layer defining a sensing surface on the sensing element; a passive surface surrounding the sensing surface; and a compound bound to the sensing surface and not bound to the passive surface, the compound having a ligand specifically configured to preferentially bind a target molecule to be sensed. An electrolyte solution in contact with the sensing surface and the passive surface forms a top gate of the apparatus.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: April 7, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Christopher P. D'Emic, Ashish Jagtiani, Sufi Zafar
  • Field effect transistor-based bio sensor
    Patent number: 8994077
    Abstract: An apparatus comprises: a sensing element formed on a buried oxide layer of a substrate and providing communication between a source region and a drain region; a gate dielectric layer on the sensing element, the gate dielectric layer defining a sensing surface on the sensing element; a passive surface surrounding the sensing surface; and a compound bound to the sensing surface and not bound to the passive surface, the compound having a ligand specifically configured to preferentially bind a target molecule to be sensed. An electrolyte solution in contact with the sensing surface and the passive surface forms a top gate of the apparatus.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 31, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Christopher P. D'Emic, Ashish Jagtiani, Sufi Zafar
  • DNA sequence using multiple metal layer structure with different organic coatings forming different transient bondings to DNA
    Patent number: 8986524
    Abstract: A nanodevice includes a reservoir filled with conductive fluid and a membrane separating the reservoir. A nanopore is formed through the membrane having electrode layers separated by insulating layers. A certain electrode layer has a first type of organic coating and a pair of electrode layers has a second type. The first type of organic coating forms a motion control transient bond to a molecule in the nanopore for motion control, and the second type forms first and second transient bonds to different bonding sites of a base of the molecule. When a voltage is applied to the pair of electrode layers a tunneling current is generated by the base in the nanopore, and the tunneling current travels via the first and second transient bonds formed to be measured as a current signature for distinguishing the base. The motion control transient bond is stronger than first and second transient bonds.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: March 24, 2015
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Hongbo Peng, Stephen M. Rossnagel, Ajay K. Royyuru, Gustavo A. Stolovitzky, Philip S. Waggoner
  • NANO-FLUIDIC FIELD EFFECTIVE DEVICE TO CONTROL DNA TRANSPORT THROUGH THE SAME
    Publication number: 20150068902
    Abstract: The present invention provides a nano-fluidic field effective device. The device includes a channel having a first side and a second side, a first set of electrodes adjacent to the first side, a second set of electrodes adjacent to the second side, a control unit for applying electric potentials to the electrodes and a fluid within the channel containing a charge molecule. The first set of electrodes is disposed such that application of electric potentials produces a spatially varying electric field that confines a charged molecule within a predetermined area of said channel. The second set of electrodes is disposed such that application of electric potentials relative to the electric potentials applied to the first set of electrodes creates an electric field that confines the charged molecule to an area away from the second side of the channel.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Glenn J. Martyna, Dennis M. Newns, Hongbo Peng, Stanislav Polonsky, Stephen Rossnagel, Gustavo Stolovitzky
  • DNA SEQUENCING USING A SUSPENDED CARBON NANOTUBE
    Publication number: 20150060275
    Abstract: A technique is provided for forming a nanodevice for sequencing. A bottom metal contact is disposed at a location in an insulator that is on a substrate. A nonconducting material is disposed on top of the bottom metal contact and the insulator. A carbon nanotube is disposed on top of the nonconducting material. Top metal contacts are disposed on top of the carbon nanotube at the location of the bottom metal contact, where the top metal contacts are formed at opposing ends of the carbon nanotube at the location. The carbon nanotube is suspended over the bottom metal contact at the location, by etching away the nonconducting material under the carbon nanotube to expose the bottom metal contact as a bottom of a trench, while leaving the nonconducting material immediately under the top metal contacts as walls of the trench.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Applicant: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Aaron D. Franklin, George S. Tulevski