Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

NUST MISIS scientists present metamaterial for solar cells and nanooptics July 23rd, 2018

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern July 21st, 2018

World's fastest man-made spinning object could help study quantum mechanics July 20th, 2018

Relax, just break it July 20th, 2018

Nanomedicine

Nano-kirigami: 'Paper-cut' provides model for 3D intelligent nanofabrication July 13th, 2018

UMBC researchers develop nanoparticles to reduce internal bleeding caused by blast trauma July 13th, 2018

Researchers identify cost-cutting option in treating nail fungus with nanotechnology: GW researcher Adam Friedman, M.D., studied the potential use of nitric oxide-releasing nanoparticles to improve onychomycosis treatment July 11th, 2018

New sensor technology enables super-sensitive live monitoring of human biomolecules July 3rd, 2018

Optical computing/Photonic computing

NUST MISIS scientists present metamaterial for solar cells and nanooptics July 23rd, 2018

SUNY Poly-Led AIM Photonics and Partners Attend SEMICON West 2018 to Showcase High-Tech Advances, Collaboration, and Future R&D Opportunities: New York’s Tech Valley Makes a Major Showing in Silicon Valley July 3rd, 2018

Powering the 21st Century with Integrated Photonics: UCSB-Led Team Selected for Demonstration of a Novel Waveguide Platform Which is Transparent Throughout the MWIR and LWIR Spectral Bands June 19th, 2018

Carbon nanotube optics poised to provide pathway to optical-based quantum cryptography and quantum computing: Researchers are exploring enhanced potential of carbon nanotubes for unique applications June 18th, 2018

Sensors

Leti & Partners Launch Pilot Program to Assess New Perception Sensors for Autonomous Vehicles July 5th, 2018

New sensor technology enables super-sensitive live monitoring of human biomolecules July 3rd, 2018

A refined magnetic sense: Algorithms and hardware developed in the context of quantum computation are shown to be useful for quantum-enhanced sensing of magnetic fields July 2nd, 2018

NIST Researchers Simulate Simple Logic for Nanofluidic Computing June 30th, 2018

Nanoelectronics

GLOBALFOUNDRIES Surpasses $2 Billion in Design Win Revenue on 22FDX® Technology : With 50 client designs and growing, 22FDX proves its value as a cost-effective solution for power-sensitive applications July 9th, 2018

High-power electronics keep their cool with new heat-conducting crystals July 6th, 2018

Leti Presenting Strategic Vision and Hosting a Workshop at SEMICON West: “From Electrons to Photons” Leti Workshop and CEO Media Briefing Set for Tuesday, July 10 in W Hotel, San Francisco June 12th, 2018

Quantum Interference May Be Key to Smaller Insulators: Breakthrough could jumpstart further miniaturization of transistors June 6th, 2018

Announcements

NUST MISIS scientists present metamaterial for solar cells and nanooptics July 23rd, 2018

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern July 21st, 2018

World's fastest man-made spinning object could help study quantum mechanics July 20th, 2018

Relax, just break it July 20th, 2018

Tools

Relax, just break it July 20th, 2018

The relationship between charge density waves and superconductivity? It's complicated July 19th, 2018

Oxford Instruments’ 22 Tesla superconducting magnet system commissioned at the UAM, making it the most intense magnetic field available outside a large international facility July 12th, 2018

Nanometrics to Announce Second Quarter Financial Results on July 31, 2018 July 12th, 2018

Quantum Dots/Rods

Individual quantum dots imaged in 3-D for first time February 28th, 2018

Moving nanoparticles using light and magnetic fields January 25th, 2018

Tweaking quantum dots powers-up double-pane solar windows: Engineered quantum dots could bring down the cost of solar electricity January 2nd, 2018

Quantum communications bend to our needs: By changing the wavelengths of entangled photons to those used in telecommunications, researchers see quantum technology take a major leap forward September 28th, 2017

Nanobiotechnology

UMBC researchers develop nanoparticles to reduce internal bleeding caused by blast trauma July 13th, 2018

Researchers identify cost-cutting option in treating nail fungus with nanotechnology: GW researcher Adam Friedman, M.D., studied the potential use of nitric oxide-releasing nanoparticles to improve onychomycosis treatment July 11th, 2018

New sensor technology enables super-sensitive live monitoring of human biomolecules July 3rd, 2018

Arrowhead Presents New Clinical Data on ARO-AAT at Alpha-1 National Education Conference July 1st, 2018

Photonics/Optics/Lasers

NUST MISIS scientists present metamaterial for solar cells and nanooptics July 23rd, 2018

Future electronic components to be printed like newspapers July 20th, 2018

SUNY Poly-Led AIM Photonics and Partners Attend SEMICON West 2018 to Showcase High-Tech Advances, Collaboration, and Future R&D Opportunities: New York’s Tech Valley Makes a Major Showing in Silicon Valley July 3rd, 2018

Cleaning or Etching Items with Unique Geometries Requires Specialized Expertise June 27th, 2018

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