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Selective Aggregation of Single-Walled Carbon Nanotubes Using the Large Optical Field Gradient of a Focused Laser Beam

Selective Aggregation of Single-Walled Carbon Nanotubes Using the Large Optical Field Gradient of a Focused Laser Beam

Selective Aggregation of Single-Walled Carbon Nanotubes Using the Large Optical Field Gradient of a Focused Laser Beam

We demonstrate the selective aggregation of single-walled carbon nanotubes by photon forces, using the large optical field gradient of a laser focused through a high numerical aperture objective lens. The nanotubes, dispersed in an aqueous solution with a surfactant, are detected via Raman scattering from the confocal volume of the optical trap. By using a visible-light laser for both trapping and detection, the dynamics of the radial breathing mode signal taken at short intervals shows an increase of a single breathing mode over time, indicating the increase in the density of only one species of tube in the focal volume. This result represents a significant step toward the development of techniques for the arbitrary manipulation and sorting of nanotubes by optical fields.

Detection of Trace Hg2+ via Induced Circular Dichroism of DNA Wrapped Around Single-Walled Carbon Nanotubes

via Induced Circular Dichroism of DNA Wrapped Around Single-Walled Carbon Nanotubes [J. Am. Chem. Soc. 2008, 130, 9190-9191].

Optical tweezers trap nanotubes by color

(Nanowerk News) Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities). Each type of nanotube has its own electronic and optical properties. Physicists at Osaka University in Japan used colored light to selectively manipulate different types of carbon nanotubes ("Selective Aggregation of Single-Walled Carbon Nanotubes Using the Large Optical Field Gradient of a Focused Laser Beam"). They found that some of nanotubes displayed a tendency to cluster at the focal area of a focused laser beam.

A Cautionary Note In The Use Of Carbon Nanotubes As Interconnects

Researchers at the University of Surrey's Advanced Technology Institute (UK) have used scanning tunnelling microscopy to confirm remarkable changes in the fundamental electronic behaviour when double-walled carbon nanotubes are subject to radial deformations and torsional strain. The work reported in Nano Letters (reference below) reveals that squashing and twisting a double-walled nanotube opens an electronic band gap in an otherwise metallic system, which has major ramifications on the use of carbon nanotubes for electronic and NEMS applications.

GRIT International Groups Inc. Has Contractually Agreed to Provide Sandblasting & Painting Services to Target Rentals Ltd., an Alberta Canadian-Based Oil & Gas Rental Services Provider

GRANDE PRAIRIE, AB -- (Marketwire) -- 10/16/08 -- GRIT International Groups Inc. (GRIT) (FRANKFURT: 3GR) (GIGR) would like to inform its Shareholders and Investors of securing a contractual service to Sandblast and Paint 52 newly manufactured, Double Walled Petroleum Based (Invert) 500 Barrel/75M3 Tanks. These patented innovated double walled tank designs have received a 200% growth marketing demand. Even through the commodity price fluctuations, demand for the tanks appears strong.

Functionalized Single-Walled Carbon Nanotubes as Rationally Designed Vehicles for Tumor-Targeted Drug Delivery

Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, and Institute of Chemical Biology and Drug Discovery, State University of New York at Stony Brook, Stony Brook, New York 11794-3400

Using Single-Walled Carbon Nanotubes to Ease Electronics Assembly

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Antenna Chemistry with Metallic Single-Walled Carbon Nanotubes

Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley Institute for Nanoscale Science & Technology, Rice University, 6100 South Main, Houston, Texas 77005

Swelling the Micelle Core Surrounding Single-Walled Carbon Nanotubes with Water-Immiscible Organic Solvents

Department of Chemical Engineering, Department of Materials Science and Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611

NanoIntegris Announces Sale of Metallic and Semiconducting Single-Walled Carbon Nanotubes

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Improving the Effectiveness of Interfacial Trapping in Removing Single-Walled Carbon Nanotube Bundles

Department of Chemical Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611

Tweezers Trap Nanotubes by Color

Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities). Each type of nanotube has its own electronic and optical properties. Physicists at Osaka University in Japan used colored light to selectively manipulate different types of carbon nanotubes. They found that some of nanotubes displayed a tendency to cluster at the focal area of a focused laser beam.

Tweezers Trap Nanotubes By Color

Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities). Each type of nanotube has its own electronic and optical properties.

Tweezers Trap Nanotubes by Color

Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities). Each type of nanotube has its own electronic and optical properties. Physicists at Osaka University in Japan used colored light to selectively manipulate different types of carbon nanotubes. They found that some of nanotubes displayed a tendency to cluster at the focal area of a focused laser beam.

Tweezers Trap Nanotubes by Color

Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities).

Directed Growth of Carbon Nanotubes Across Gaps

An experiment has shown that when single- walled carbon nanotubes (SWNTs) are grown by chemical vapor deposition in the presence of an electric field of suitable strength, the nanotubes become aligned along the electric field. In an important class of contemplated applications, one would exploit this finding in fabricating nanotube transistors; one would grow SWNTs across gaps between electrodes that would serve, subsequently, as source and drain contacts during operation of the transistors.

Mimicking gecko feet: Dry adhesive based on carbon nanotubes gets stronger

Typical side view of the inverted vertically-aligned multi-walled carbon nanotube film without top entangled segments before adhesion measurements. Image courtesy of Liangti Qu

Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability: Mimicking gecko feet

Scanning electron microscope images of the vertically-aligned multi-walled carbon nanotubes grown for this research. Credit: Image courtesy of Liangti Qu

US Army to Explain Military Interest in Nano Materials at Major Nanotechnology Conference This Week

Materials of interest include Fullerenes (C60), Multi and single-walled carbon nanotubes, Nano-silver, Aluminum oxide, Sediment, Terrestrial, Coatings

Nanotailor to Attend NanoTXUSA'08

Nanotailor, Inc., a nanomaterials company specializing in the manufacturing of Single-Walled Carbon Nanotubes, announced today that in cooperation with the Nanomaterials Application Center [NAC] at Texas State University-San Marcos, Nanotailor will have a presence at the upcoming NanoTXUSA'08 Conference and Expo to be held in Dallas, Texas on October 2nd and 3rd at the Hyatt Regency Convention Hotel. Nanotailor will have a presence along with Texas State University at Booth #503.

Nanotailor to Attend NanoTXUSA'08

Nanotailor, Inc., a nanomaterials company specializing in the manufacturing of Single-Walled Carbon Nanotubes, announced today that in cooperation with the Nanomaterials Application Center [NAC] at Texas State University-San Marcos, Nanotailor will have a presence at the upcoming NanoTXUSA'08 Conference and Expo to be held in Dallas, Texas on October 2nd and 3rd at the Hyatt Regency Convention Hotel. Nanotailor will have a presence along with Texas State University at Booth #503.

Nanotailor to Attend NanoTXUSA'08

(Nanowerk News) Nanotailor, Inc., a nanomaterials company specializing in the manufacturing of Single-Walled Carbon Nanotubes, announced today that in cooperation with the Nanomaterials Application Center [NAC] at Texas State University-San Marcos, Nanotailor will have a presence at the upcoming NanoTXUSA'08 Conference and Expo to be held in Dallas, Texas on October 2nd and 3rd at the Hyatt Regency Convention Hotel. Nanotailor will have a presence along with Texas State University at Booth #503.

A jailbreak for Google's Android

Hack allows users a way to read data on parts of the G1 that are walled off and could be used to install new programs or even a new OS on the mobile phone

Cautionary Note In Use Of Carbon Nanotubes As Interconnects

Researchers at the University of Surrey’s Advanced Technology Institute (UK) have used scanning tunnelling microscopy to confirm remarkable changes in the fundamental electronic behaviour when double-walled carbon nanotubes are subject to radial deformations and torsional strain.

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