Title: Method for the rapid synthesis of large quantities of metal oxide nanowires at low temperatures

Abstract

A process for the rapid synthesis of metal oxide nanoparticles at low temperatures and methods which facilitate the fabrication of long metal oxide nanowires. The method is based on treatment of metals with oxygen plasma. Using oxygen plasma at low temperatures allows for rapid growth unlike other synthesis methods where nanomaterials take a long time to grow. Density of neutral oxygen atoms in plasma is a controlling factor for the yield of nanowires. The oxygen atom density window differs for different materials. By selecting the optimal oxygen atom density for various materials the yield can be maximized for nanowire synthesis of the metal.

Inventors:

Sunkara, Mahendra Kumar ^[1]; Vaddiraju, Sreeram ^[2]; Mozetic, Miran ^[3]; Cvelbar, Uros ^[4]

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+ Show Inventor Affiliations

1. Louisville, KY
2. Mountain View, CA
3. Ljubljan, SI
4. Idrija, SI

Issue Date:

Tue Sep 22 00:00:00 EDT 2009

Research Org.:

Univ. of Louisville, KY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

988698

Patent Number(s):

7591897

Application Number:

11/385,015

Assignee:

University of Louisville Research Foundation, Inc. (Louisville, KY)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J19/081 - {employing particle radiation or gamma-radiation}
B01J19/085 - {Electron beams only}
B01J19/088 - {giving rise to electric discharges
B01J19/121 - {Coherent waves, e.g. laser beams
B01J19/126 - {Microwaves}
B01J19/129 - {Radiofrequency}
B01J2219/0847 - Glow discharge
B01J2219/0869 - Feeding or evacuating the reactor
B01J2219/0886 - Gas-solid

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B13/322 - {of elements or compounds in the solid state}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C01G15/00 - Compounds of gallium, indium or thallium
C01G31/02 - Oxides
C01G33/00 - Compounds of niobium

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/01 - depicted by a TEM-image
C01P2002/82 - by IR- or Raman-data
C01P2004/03 - obtained by SEM
C01P2004/04 - obtained by TEM, STEM, STM or AFM
C01P2004/16 - Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
C01P2004/62 - Submicrometer sized, i.e. from 0.1-1 micrometer
C01P2004/64 - Nanometer sized, i.e. from 1-100 nanometer

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S977/844 - Growth by vaporization or dissociation of carbon source using a high-energy heat source, e.g. electric arc, laser, plasma, e-beam

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DOE Contract Number:  

FG02-05ER64071

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

77 NANOSCIENCE AND NANOTECHNOLOGY