Nanotechnology Now

Our NanoNews Digest Sponsors







Heifer International

Wikipedia Affiliate Button


Home > Press > New synthesis method produces nanoparticles in high quantities

Abstract:
TiO2 nanoparticles are in increasingly high demand for a range of applications, including photocatalysts, photonic crystals, photovoltaic cells, gas sensors, fuel cells, pigments and cosmetics. Now researchers in Japan have demonstrated a new method for synthesis of TiO2 nanoparticles in large amounts.

New synthesis method produces nanoparticles in high quantities

Kanazawa, Japan | Posted on February 25th, 2013

Researchers have already used inductively coupled thermal plasmas (ICTPs) as a useful source of heat and chemicals in synthesis. These plasmas are forms of the chemical that have been ionised by energy produced by electric currents produced by fluctuating magnetic fields, so-called electromagnetic induction. However application of ICTPs in nanoparticle synthesis has met with difficulties in controlling the particle size.

Yasunori Tanaka and colleagues at Kanazawa University and Nisshin Seifun Group in Japan had previously modified the ICTP approach using a modulated current coil to give voltage pulses and other arbitrary waveforms. The modulated current provides a means of controlling the temperature and density of the chemical species during synthesis. Applying these pulse-modulated inductive thermal plasmas (PMITP) to TiO2 nanoparticle synthesis allowed control over the particle size and mineral phase. However, due to the latent heat of evaporation of the powders, there was a limit to how much the feed rate could be increased before the ICTP failed to evaporate all the powder.

Now the researchers have demonstrated that carefully timed intermittent feeding combined with gas quenching to synchronise with the pulse modulation of the induction thermal plasmas allowed oxidation of all the titanium into TiO2 nanoparticle even when synthesised in large amounts. They conclude, "The results indicated that the synthesized particles by the 20-kW PMITP with a heavy loading rate of 12.3 g/min had a similar particle size distribution with the mean diameter about 40 nm to those with light loading of 4.2 g/min."

1. Faculty of Electrical and Computer Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
2. Research Center for Production & Technology, Nisshin Seifun Group Inc.,5-3-1 Tsurugaoka, Fujimino 356-8511, Japan

*corresponding author, e-mail address:

####

For more information, please click here

Contacts:
Organization of Frontier Science and Innovation
Kanazawa University
Kakuma, Kanazawa, Ishikawa 920-1192, Japan

Copyright © Kanazawa University

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 Links

Publication and Affiliation

Related News Press

News and information

How do cold ions slide May 24th, 2013

Heinrich Rohrer dies at 79; a father of nanotechnology: With IBM colleague Gerd Binnig, Rohrer invented the scanning tunneling microscope, which can show individual atoms on a surface and move them around May 23rd, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013

Sensors

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Innovation could bring flexible solar cells, transistors, displays May 22nd, 2013

New Nanopore Sensor Simplifies Analysis of Methylated DNA May 20th, 2013

Imec and Renesas collaborate on ultra-low power short range radios: Collaboration will develop robust wireless solutions for future electronics May 16th, 2013

Discoveries

How do cold ions slide May 24th, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Whirlpools on the Nanoscale Could Multiply Magnetic Memory: At the Advanced Light Source, Berkeley Lab scientists join an international team to control spin orientation in magnetic nanodisks May 22nd, 2013

Bacterial spare parts filter antibiotic residue from groundwater May 22nd, 2013

Materials

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Weird science: Crystals melt when they're cooled May 22nd, 2013

INSCX™ exchange announces substantial increase in capital designated to provide Trade Finance for registered Nanomaterial Producers May 21st, 2013

Announcements

How do cold ions slide May 24th, 2013

Heinrich Rohrer dies at 79; a father of nanotechnology: With IBM colleague Gerd Binnig, Rohrer invented the scanning tunneling microscope, which can show individual atoms on a surface and move them around May 23rd, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013

Energy

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Innovation could bring flexible solar cells, transistors, displays May 22nd, 2013

Researchers Stitch Defects into the World’s Thinnest Semiconductor May 22nd, 2013

Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency: MIT and Brookhaven Lab scientists use electron microscopy imaging techniques to settle a solid-state controversy and raise new experimental possibilities May 22nd, 2013

Personal Care

Harris & Harris Group Notes Solazyme and Mitsui Multi-Year Agreement February 7th, 2013

X-rays reveal uptake of nanoparticles by soya bean crops: Metals contained in nanoparticles can enter into the food chain February 6th, 2013

Nature: super gel stiffens when heated January 23rd, 2013

Research and Markets: The Global Nanotechnology and Nanomaterials Industry 2013 Report: Stage of Development, Global Activity and Market Opportunities December 16th, 2012

Fuel Cells

Researchers develop unique method for creating uniform nanoparticles May 6th, 2013

Surface diffusion plays a key role in defining the shapes of catalytic nanoparticles April 8th, 2013

Nanoparticles Combined with Light Reverses Rusting April 1st, 2013

Hydrogen stores wind and solar energy: Innovative "Power-to-Gas" concepts at Hannover Messe March 7th, 2013

Photonics/Optics/Lasers

How do cold ions slide May 24th, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Rice unveils method for tailoring optical processors: Arranging nanoparticles in geometric patterns allows for control of light with light May 21st, 2013

Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013

Solar/Photovoltaic

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Innovation could bring flexible solar cells, transistors, displays May 22nd, 2013

Researchers Stitch Defects into the World’s Thinnest Semiconductor May 22nd, 2013

Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency: MIT and Brookhaven Lab scientists use electron microscopy imaging techniques to settle a solid-state controversy and raise new experimental possibilities May 22nd, 2013

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








abbigliamento uomo
Computer Accessories
© Copyright 1999-2013 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE