Patents by Inventor Michael R. Zachariah

Michael R. Zachariah 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).

  • Publication number: 20240190789
    Abstract: Compositions comprising magnesium nanoparticles, a nanoscale metal or metalloid, and an oxidizer and methods of fabrication the compositions are described. One example use of such compositions is in high energy fuel applications. One example method includes fabricating a composite by adding magnesium nanoparticles to a composition of a nanoscale metal or metalloid and an oxidant. Examples of the composition resulting from the described processes provides shorter burn times and a multi-fold increase in reactivity compared to the corresponding composition comprising the same amount of nanoscale metal or metalloid and oxidizer but without the magnesium nanoparticles.
    Type: Application
    Filed: December 8, 2023
    Publication date: June 13, 2024
    Inventors: Michael R. Zachariah, Reza Abbaschian, Pankaj Ghildiyal, Steven Herrera
  • Publication number: 20240157442
    Abstract: A method and system are disclosed of assembling metal particles into nanoparticles. The method includes electromagnetically levitating the metal particles; inductively heating the electromagnetically levitated metal particles beyond their melting point into metal droplets; and wherein an evaporation flux achieved at a surface of the metal droplets result in a supersaturation of metal atoms around the metal droplets leading to nucleation and growth of the nanoparticles.
    Type: Application
    Filed: March 9, 2022
    Publication date: May 16, 2024
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Michael R. Zachariah, Reza Abbaschian, Pankaj Ghildiyal, Steven Herrera, Prithwish Biswas
  • Publication number: 20240002310
    Abstract: An energetic composition and a method of unzipping polymer binders are disclosed, which includes localizing a heat feedback just near the reaction front by unzipping polymer binders employed to a nanothermite. The energetic composition includes an unzipping polymer binder employed to high load fuel and oxidizer particles.
    Type: Application
    Filed: June 28, 2023
    Publication date: January 4, 2024
    Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, The Board of Trustees of the University of Illinois
    Inventors: Haiyang Wang, Michael R. Zachariah, Jeffrey S. Moore, Mayank Garg
  • Patent number: 9677984
    Abstract: A method for extracting shape information for particles with similar shape and corresponding system of a tandem differential mobility analyzer (DMA) and pulse field differential mobility analyzer (PFDMA) system, that executes at least generating a steady state aerosol concentration; passing aerosol flow from the aerosol concentration thru a bipolar charger to produce a known charge distribution; passing aerosol thru a DMA with set sheath and aerosol flows and a set voltage to generate a mono-mobility aerosol; passing mono-mobility aerosol thru a PFDMA system; and measuring mobility as a function of electric field by varying the duty cycle of the pulse in the PFDMA system. Alternatively, the method and system relate to separating particles with different shapes by adjusting the duty cycle of the pulse to reach a higher or lower electric field than in the DMA in which the mono-mobility aerosol was generated; and separating particles based on shape.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: June 13, 2017
    Assignee: University of Maryland
    Inventors: Michael R. Zachariah, Mingdong Li, George W. Mulholland
  • Patent number: 9492870
    Abstract: Low temperature gas-phase methods for the preparation of faceted aluminum crystals are disclosed.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 15, 2016
    Assignees: University of Maryland, College Park, United States of America as Represented by the Secretary of the Navy
    Inventors: Daniel Kaplowitz, R. Jason Jouet, Michael R. Zachariah
  • Patent number: 9271936
    Abstract: A method for synthesizing a mesoporous silica nanoparticle, a mesoporous silica nanoparticle, and applications thereof are provided. The method includes fractionating a mesoporous silica nanoparticle suspension to produce size-fractionated mesoporous silica nanoparticle. The method further includes etching the size-fractionated mesoporous silica nanoparticle to produce synthesized mesoporous silica nanoparticle having a hollow, porous morphology configured to receive one of a therapeutic agent and an imaging material. The etching includes differential etching of silica from areas of low polymeric density within the mesoporous silica nanoparticle and re-depositing of the silica in areas of higher polymeric density existing near the surface of the mesoporous silica nanoparticle. A target material is loaded into the synthesized mesoporous silica nanoparticle and a controlled released of the target material is provided by decreasing the physiological pH of the surface of the mesoporous silica nanoparticle.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: March 1, 2016
    Assignee: UNIVERSITY OF MARYLAND
    Inventors: Philip R. DeShong, Michael R. Zachariah, Peter DeMuth, Anand Prakash, Charles Luckett, Douglas Stephen English
  • Publication number: 20150221490
    Abstract: A method for extracting shape information for particles with similar shape and corresponding system of a tandem differential mobility analyzer (DMA) and pulse field differential mobility analyzer (PFDMA) system, that executes at least generating a steady state aerosol concentration; passing aerosol flow from the aerosol concentration thru a bipolar charger to produce a known charge distribution; passing aerosol thru a DMA with set sheath and aerosol flows and a set voltage to generate a mono-mobility aerosol; passing mono-mobility aerosol thru a PFDMA system; and measuring mobility as a function of electric field by varying the duty cycle of the pulse in the PFDMA system. Alternatively, the method and system relate to separating particles with different shapes by adjusting the duty cycle of the pulse to reach a higher or lower electric field than in the DMA in which the mono-mobility aerosol was generated; and separating particles based on shape.
    Type: Application
    Filed: February 2, 2015
    Publication date: August 6, 2015
    Applicant: UNIVERSITY OF MARYLAND
    Inventors: Michael R. Zachariah, Mingdong Li, George W. Mulholland
  • Patent number: 8628747
    Abstract: Carbon nanotube structures are formed by providing metal composite particles including a catalyst metal and a non-catalyst metal, where the catalyst metal catalyzes the decomposition of a hydrocarbon compound and the formation of carbon nanotube structures on surfaces of the particles. The metal composite particles are combined with the hydrocarbon compound in a heated environment so as to form carbon nanotube structures on the surfaces of the metal composite particles. The metal composite particles can be include iron and aluminum at varying amounts. The carbon nanotubes formed on the metal particles can remain on the metal particles or, alternatively, be removed from the metal particles for use in different applications.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: January 14, 2014
    Assignee: University of Maryland College Park
    Inventors: Michael R. Zachariah, Soo H. Kim
  • Publication number: 20130129563
    Abstract: Low temperature gas-phase methods for the preparation of faceted aluminum crystals are disclosed.
    Type: Application
    Filed: September 14, 2012
    Publication date: May 23, 2013
    Inventors: Daniel KAPLOWITZ, R. Jason JOUET, Michael R. ZACHARIAH
  • Patent number: 8324703
    Abstract: An in situ approach toward connecting and electrically contacting vertically aligned nanowire arrays using conductive nanoparticles is provided. The utility of the approach is demonstrated by development of a gas sensing device employing the nanowire assembly. Well-aligned, single-crystalline zinc oxide nanowires were grown through a direct thermal evaporation process at 550° C. on gold catalyst layers. Electrical contact to the top of the nanowire array was established by creating a contiguous nanoparticle film through electrostatic attachment of conductive gold nanoparticles exclusively onto the tips of nanowires. A gas sensing device was constructed using such an arrangement and the nanowire assembly was found to be sensitive to both reducing (methanol) and oxidizing (nitrous oxides) gases. This assembly approach is amenable to any nanowire array for which a top contact electrode is needed.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: December 4, 2012
    Assignees: University of Maryland, The United States of America as represented by the Secretary of Commerce
    Inventors: Prahalad Parthangal, Michael R. Zachariah, Richard E. Cavicchi
  • Patent number: 7781350
    Abstract: In a method and system for controllable electrostatic-directed deposition of nanoparticles from the gas phase on a substrate patterned to have p-n junction(s), a bias electrical field is reversely applied to the p-n junction, so that uni-polarly charged nanoparticles are laterally confined on the substrate by a balance of electrostatic, van der Waals and image forces and are deposited on a respective p-doped or n-doped regions of the p-n junction when the applied electric field reaches a predetermined strength. The novel controllable deposition of nanoparticles employs commonly used substrate architectures for the patterning of an electric field attracting or repelling nanoparticles to the substrates and offers the opportunity to create a variety of sophisticated electric field patterns which may be used to direct particles with greater precision.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: August 24, 2010
    Assignee: University of Maryland
    Inventors: Michael R. Zachariah, De-Hao Tsai, Raymond J. Phaneuf, Timothy D. Corrigan, Soo H. Kim
  • Publication number: 20090311332
    Abstract: A method for synthesizing a mesoporous silica nanoparticle, a mesoporous silica nanoparticle, and applications thereof are provided. The method includes fractionating a mesoporous silica nanoparticle suspension to produce size-fractionated mesoporous silica nanoparticle. The method further includes etching the size-fractionated mesoporous silica nanoparticle to produce synthesized mesoporous silica nanoparticle having a hollow, porous morphology configured to receive one of a therapeutic agent and an imaging material. The etching includes differential etching of silica from areas of low polymeric density within the mesoporous silica nanoparticle and re-depositing of the silica in areas of higher polymeric density existing near the surface of the mesoporous silica nanoparticle. A target material is loaded into the synthesized mesoporous silica nanoparticle and a controlled released of the target material is provided by decreasing the physiological pH of the surface of the mesoporous silica nanoparticle.
    Type: Application
    Filed: March 6, 2009
    Publication date: December 17, 2009
    Inventors: Philip R. DeShong, Michael R. Zachariah, Peter DeMuth, Anand Prakash, Charles Luckett, Douglas Stephen English
  • Publication number: 20090032801
    Abstract: An in situ approach toward connecting and electrically contacting vertically aligned nanowire arrays using conductive nanoparticles is provided. The utility of the approach is demonstrated by development of a gas sensing device employing the nanowire assembly. Well-aligned, single-crystalline zinc oxide nanowires were grown through a direct thermal evaporation process at 550° C. on gold catalyst layers. Electrical contact to the top of the nanowire array was established by creating a contiguous nanoparticle film through electrostatic attachment of conductive gold nanoparticles exclusively onto the tips of nanowires. A gas sensing device was constructed using such an arrangement and the nanowire assembly was found to be sensitive to both reducing (methanol) and oxidizing (nitrous oxides) gases. This assembly approach is amenable to any nanowire array for which a top contact electrode is needed.
    Type: Application
    Filed: April 29, 2008
    Publication date: February 5, 2009
    Applicant: University of Maryland
    Inventors: Prahalad Parthangal, Michael R. Zachariah, Richard E. Cavicchi
  • Publication number: 20080280136
    Abstract: Carbon nanotube structures are formed by providing metal composite particles including a catalyst metal and a non-catalyst metal, where the catalyst metal catalyzes the decomposition of a hydrocarbon compound and the formation of carbon nanotube structures on surfaces of the particles. The metal composite particles are combined with the hydrocarbon compound in a heated environment so as to form carbon nanotube structures on the surfaces of the metal composite particles. The metal composite particles can be include iron and aluminum at varying amounts. The carbon nanotubes formed on the metal particles can remain on the metal particles or, alternatively, be removed from the metal particles for use in different applications.
    Type: Application
    Filed: December 21, 2007
    Publication date: November 13, 2008
    Applicant: University of Maryland
    Inventors: Michael R. Zachariah, Soo H. Kim
  • Patent number: 7276224
    Abstract: Methods of producing nanoporous particles by spray pyrolysis of a precursor composition including a reactive precursor salt and a nonreactive matrix salt are provided, wherein the matrix salt is used as a templating medium. Nanoporous aluminum oxide particles produced by the methods are also provided.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: October 2, 2007
    Assignee: Regents of the University of Minnesota
    Inventors: Michael R. Zachariah, Benjamin Y. H. Liu
  • Patent number: 6113983
    Abstract: A new low temperature method for nanostructured metal and ceramic thin film growth by chemical vapor deposition (CVD) involves the use of a low pressure co-flow diffusion flame reactor to react alkali metal vapor and metal halide vapor to deposit metal, alloy and ceramic films. The reaction chemistry is described by the following general equation:(mn)Na+nMX.sub.m .fwdarw.(M).sub.n +(nm)NaXwhere Na is sodium, or another alkali metal (e.g., K, Rb, Cs), and MX.sub.m is a metal-halide (M is a metal or other element such as Si, B or C; X is a halogen atom, e.g., chlorine, fluorine or the like; and m and n are integers). This reaction chemistry is a viable technique for thin film growth. In one mode, using the precursors of sodium metal vapor, titanium tetrachloride (the limiting reagent), and either argon or nitrogen gases, titanium (Ti), titanium nitride (TiN), titanium dioxide (TiO.sub.2), and titanium silicide (TiSi, Ti.sub.5 Si.sub.3, TiSi.sub.2, Ti.sub.5 Si.sub.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: September 5, 2000
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Michael R. Zachariah, Jay H. Hendricks
  • Patent number: 5936137
    Abstract: A method of destroying halogenated compounds by a vapor phase chemical reaction using an alkali metal vapor, alkaline earth metal vapor, or a combination of the two, in a heated reactor to produce mineralized or solid products. The production of solid products, such as halide salts and particulate carbon, yields numerous advantages in the collection and disposal of the resulting products. The invention is especially useful for the destruction of chlorofluorocarbons.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: August 10, 1999
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Michael R. Zachariah, Douglas P. DuFaux