Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Novel Technique Enables Rapid Size Determination of Quantum Dots and Nanoparticles

Abstract:
Novel Technique Enables Rapid Size Determination of Quantum Dots and Nanoparticles

Novel Technique Enables Rapid Size Determination of Quantum Dots and Nanoparticles

York, UK | Posted on August 26th, 2009

Quantum dots are a new form of semiconductors that model atoms. Being only nanometers in size and offering high quantum efficiency, quantum dots are opening up exciting new applications in medical imaging, electronics and optical technologies. Determining the hydrodynamic radius of synthesized samples is of considerable importance as size has a significant effect on the more subtle effects offered by quantum dots.

Data presented on the website (www.paraytec.com/downloads/application-notes/) shows how researchers were able to achieve excellent correlation between experimental and expected values of quantum dot hydrodynamic radii with typical analysis times of less than 10 minutes. Professor Stephen Evansof the Department of Physics at the University of Leeds (UK) commented "We are delighted at the data generated from this study. This approach promises to offer significant benefit to the quantum dot and nanoparticle manufacturing community as it has the potential to enable rapid, on-line size determination in a fraction of the time offered by current methods such as Transmission Electron Microscopy (TEM)".

The study was peformed on the ActiPix™ HT Nano-Sizing System. This system is a high precision nano-sizing system consisting of a precision nano-injector, autosampler and detector. Samples are typically stored in the autosampler prior to injection of a few nanolitres of each sample into a fused capillary. A plug of the sample, typically 20-100 nL, is injected at the capillary inlet of a specially designed sizing cartridge and driven by application of external pressure along the capillary. UV absorption of the sample is recorded in the first and the second detection window using the ActiPix™ D100 detector. Whilst the area of the peak is the same, the widths of both peaks are different: the signal from the second window has a greater width and lower amplitude due to Taylor dispersion. The peaks are fitted with an appropriate peak fitting function using software supplied with the system. The area under the peak corresponds to the amount of the quantum dot injected. The standard deviations are used to calculate the hydrodynamic radius of the sample.

Paraytec's multi-award winning product, the ActiPix™ D100, is the world's first quantitative UV area imaging system. As well as providing superior performance over conventional particle measuring techniques, which cannot effectively measure down to sub 20 nanometre sizes, the patented ActiPix™ opens up intriguing new possibilities never before possible using conventional detectors.

####

About Paraytec Ltd
Paraytec Ltd is a scientific instrument company based in York, UK, designing, developing and manufacturing innovative detectors. Paraytec was established in January 2005 as a spin-out from the Chemistry Department at the University of York, UK. Winner of the prestigious PittCon Editors Silver Award and an R&D 100 Award in 2007, the ActiPix™ D100 has achieved widespread recognition as a novel analytical instrument delivering applications advances.

For more information, please click here

Contacts:
+44-1904-526270

Copyright © Paraytec 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

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Nanomedicine

NYU Researchers Break Nano Barrier to Engineer the First Protein Microfiber October 23rd, 2014

Iranian Scientists Apply Nanotechnology to Produce Surgery Suture October 23rd, 2014

RF Heating of Magnetic Nanoparticles Improves the Thawing of Cryopreserved Biomaterials October 23rd, 2014

Sopping up proteins with thermosponges: Researchers develop novel nanoparticle platform that proves effective in delivering protein-based drugs October 22nd, 2014

Optical Computing

Nanoparticles Break the Symmetry of Light October 6th, 2014

Speed at its limits September 30th, 2014

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

Sensors

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Journal Nanotechnology Progress International (JONPI), 2014, Volume 5, Issue 1, pp 1-24 October 22nd, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

Nanoelectronics

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Announcements

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Advancing thin film research with nanostructured AZO: Innovnano’s unique and cost-effective AZO sputtering targets for the production of transparent conducting oxides October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Tools

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

National Synchrotron Light Source II Achieves 'First Light' October 23rd, 2014

Advancing thin film research with nanostructured AZO: Innovnano’s unique and cost-effective AZO sputtering targets for the production of transparent conducting oxides October 23rd, 2014

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Quantum Dots/Rods

Journal Nanotechnology Progress International (JONPI), 2014, Volume 5, Issue 1, pp 1-24 October 22nd, 2014

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Ultrafast remote switching of light emission October 2nd, 2014

Platinum meets its match in quantum dots from coal: Rice University's cheap hybrid outperforms rare metal as fuel-cell catalyst October 1st, 2014

Nanobiotechnology

NYU Researchers Break Nano Barrier to Engineer the First Protein Microfiber October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

‘Designer’ nanodevice could improve treatment options for cancer sufferers October 22nd, 2014

Photonics/Optics/Lasers

Physicists build reversible laser tractor beam October 20th, 2014

Magnetic mirrors enable new technologies by reflecting light in uncanny ways October 16th, 2014

New VDMA Association "Electronics, Micro and Nano Technologies" founded: Inaugural Meeting in Frankfurt/Main, Germany October 15th, 2014

Nanodevices for clinical diagnostic with potential for the international market: The development is based on optical principles and provides precision and allows saving vital time for the patient October 15th, 2014

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





  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE