Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Edinburgh Instruments’ Spectrometer Helps Identify New Electronic State In Carbon Nanotube Research

Abstract:
Researchers at Duke University1 have utilised the LP920 laser flash photolysis spectrometer from Edinburgh Instruments to experimentally observe excited triplet states of individualised single-wall carbon nanotubes (SWNTs) for the first time. These SWNT triplet excitons have lifetimes of the order of microseconds, differing vastly the picosecond lifetimes characteristic of the well-known SWNT singlet excitons. This research provides new insights into the fundamental photophysical processes of 1-dimensional carbon-based nanostructures.

Edinburgh Instruments’ Spectrometer Helps Identify New Electronic State In Carbon Nanotube Research

Livingston, UK | Posted on March 8th, 2012

SWNTs facilitate ballistic charge transport and fast singlet exciton migration over long distances; such properties are highly useful for electronic and photonic devices. The experimental identification of the SWNT triplet exciton state expands significantly the scope of nanotube electron and energy migration reactions that can be exploited.

Nanosecond pump-probe transient absorption spectroscopic experiments of purified, polymer wrapped SWNTs in a variety of solvents was carried out using the LP920 laser flash photolysis spectrometer equipped with the L900 software for control and data acquisition. A previously unidentified transient absorption band at 1150 nm is shown to correspond to a SWNT T1 to Tn transition; the lifetime of the SWNT triplet excited state was found to be 17.4 and 6.5 µs, respectively, in D2O and DMSO solvents.

In this study, (6,5)-chirality enriched semiconducting SWNTs that were helically wrapped by an aryleneethynylene polymer monolayer at periodic and constant morphology, were utilised. These polymer-wrapped SWNTs maintain uniform structural morphology in both D2O and DMSO solvents, and provide versatile constructs in which to probe nanotube triplet exciton states.

The LP920 laser flash photolysis spectrometer is a fully automated turnkey solution for the reliable and accurate measurement of transient absorption either in spectral and/or kinetic mode. It has a large sample chamber to house a variety of sample holders.

####

For more information, please click here

Contacts:
Press Enquiries:
In Press Public Relations Ltd
PO Box 24
Royston, Herts, SG8 6TT
Tel: +44 1763 262621

Internet: www.inpress.co.uk

Other Enquiries:
Edinburgh Instruments
Photonics Division
2 Bain Square, Kirkton Campus
Livingston, EH54 7DQ, UK
Tel: + 44 1506 425 300

Internet: www.edinburghphotonics.com

Copyright © Edinburgh Instruments Ltd.

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Nanotubes/Buckyballs/Fullerenes/Nanorods/Nanostrings

Catalytic combo converts CO2 to solid carbon nanofibers: Tandem electrocatalytic-thermocatalytic conversion could help offset emissions of potent greenhouse gas by locking carbon away in a useful material January 12th, 2024

TU Delft researchers discover new ultra strong material for microchip sensors: A material that doesn't just rival the strength of diamonds and graphene, but boasts a yield strength 10 times greater than Kevlar, renowned for its use in bulletproof vests November 3rd, 2023

Tests find no free-standing nanotubes released from tire tread wear September 8th, 2023

Detection of bacteria and viruses with fluorescent nanotubes July 21st, 2023

Announcements

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Tools

First direct imaging of small noble gas clusters at room temperature: Novel opportunities in quantum technology and condensed matter physics opened by noble gas atoms confined between graphene layers January 12th, 2024

New laser setup probes metamaterial structures with ultrafast pulses: The technique could speed up the development of acoustic lenses, impact-resistant films, and other futuristic materials November 17th, 2023

Ferroelectrically modulate the Fermi level of graphene oxide to enhance SERS response November 3rd, 2023

The USTC realizes In situ electron paramagnetic resonance spectroscopy using single nanodiamond sensors November 3rd, 2023

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project