Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



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

New class of protein misfolding simulated in high definition: Evidence for recently identified and long-lasting type of protein misfolding bolstered by atomic-scale simulations and new experiments August 8th, 2025

Sensors innovations for smart lithium-based batteries: advancements, opportunities, and potential challenges August 8th, 2025

Deciphering local microstrain-induced optimization of asymmetric Fe single atomic sites for efficient oxygen reduction August 8th, 2025

Lab to industry: InSe wafer-scale breakthrough for future electronics August 8th, 2025

Nanomedicine

New molecular technology targets tumors and simultaneously silences two ‘undruggable’ cancer genes August 8th, 2025

New imaging approach transforms study of bacterial biofilms August 8th, 2025

Cambridge chemists discover simple way to build bigger molecules – one carbon at a time June 6th, 2025

Electrifying results shed light on graphene foam as a potential material for lab grown cartilage June 6th, 2025

Optical computing/Photonic computing

ICFO researchers overcome long-standing bottleneck in single photon detection with twisted 2D materials August 8th, 2025

Programmable electron-induced color router array May 14th, 2025

Nanophotonic platform boosts efficiency of nonlinear-optical quantum teleportation April 25th, 2025

Groundbreaking research unveils unified theory for optical singularities in photonic microstructures December 13th, 2024

Sensors

Sensors innovations for smart lithium-based batteries: advancements, opportunities, and potential challenges August 8th, 2025

Quantum sensors tested for next-generation particle physics experiments: New research shows that the specialized sensors can detect particles more precisely April 25th, 2025

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

UCF researcher discovers new technique for infrared “color” detection and imaging: The new specialized tunable detection and imaging technique for infrared photons surpasses present technology and may be a cost-effective method of capturing thermal imaging or night vision, medica December 13th, 2024

Nanoelectronics

Lab to industry: InSe wafer-scale breakthrough for future electronics August 8th, 2025

Interdisciplinary: Rice team tackles the future of semiconductors Multiferroics could be the key to ultralow-energy computing October 6th, 2023

Key element for a scalable quantum computer: Physicists from Forschungszentrum Jülich and RWTH Aachen University demonstrate electron transport on a quantum chip September 23rd, 2022

Reduced power consumption in semiconductor devices September 23rd, 2022

Announcements

Sensors innovations for smart lithium-based batteries: advancements, opportunities, and potential challenges August 8th, 2025

Deciphering local microstrain-induced optimization of asymmetric Fe single atomic sites for efficient oxygen reduction August 8th, 2025

Japan launches fully domestically produced quantum computer: Expo visitors to experience quantum computing firsthand August 8th, 2025

ICFO researchers overcome long-standing bottleneck in single photon detection with twisted 2D materials August 8th, 2025

Tools

Japan launches fully domestically produced quantum computer: Expo visitors to experience quantum computing firsthand August 8th, 2025

Portable Raman analyzer detects hydrogen leaks from a distance: Device senses tiny concentration changes of hydrogen in ambient air, offering a dependable way to detect and locate leaks in pipelines and industrial systems April 25th, 2025

Rice researchers harness gravity to create low-cost device for rapid cell analysis February 28th, 2025

New 2D multifractal tools delve into Pollock's expressionism January 17th, 2025

Quantum Dots/Rods

A new kind of magnetism November 17th, 2023

IOP Publishing celebrates World Quantum Day with the announcement of a special quantum collection and the winners of two prestigious quantum awards April 14th, 2023

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

Nanobiotechnology

New molecular technology targets tumors and simultaneously silences two ‘undruggable’ cancer genes August 8th, 2025

New imaging approach transforms study of bacterial biofilms August 8th, 2025

Ben-Gurion University of the Negev researchers several steps closer to harnessing patient's own T-cells to fight off cancer June 6th, 2025

Electrifying results shed light on graphene foam as a potential material for lab grown cartilage June 6th, 2025

Photonics/Optics/Lasers

ICFO researchers overcome long-standing bottleneck in single photon detection with twisted 2D materials August 8th, 2025

INRS and ELI deepen strategic partnership to train the next generation in laser science:PhD students will benefit from international mobility and privileged access to cutting-edge infrastructure June 6th, 2025

Institute for Nanoscience hosts annual proposal planning meeting May 16th, 2025

Following the folds – with quantum technology: The connection between a crumpled sheet of paper and quantum technology: A research team at the EPFL in Lausanne (Switzerland) and the University of Konstanz (Germany) uses topology in microwave photonics to make improved systems of May 16th, 2025

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