Nanoparticles Dispersed in Water and a Variety of Polar and Non-polar Organic Fluids From Alfa Aesar

Topics Covered

Background
Nanocrystalline Powders
Synthesis Techniques
      Physical Vapor Synthesis (PVS)
      NanoArc Synthesis (NAS)
Nanoparticle Dispersions

Background

Nanophase has developed technology to permit the dispersion of its nanoparticles in water and a variety of polar and non-polar organic fluids, providing a supply of concentrated, ready-to-use nanoparticle dispersions, eliminating the need for users to disperse the nanoparticles themselves.

Alfa Aesar, a leading supplier of research chemicals, metals and materials, and Nanophase Technologies, an industry-leading nanocrystalline materials innovator, have entered into a mutually exclusive partnership for the distribution of nanoparticles and nanoparticle dispersions. Alfa Aesar is the sole distributor of research and development quantities for a group of Nanophase materials.

Figure 1. Nanoparticles and dispersions brochure

Nanocrystalline Powders

Nanocrystalline powders typically have a mean particle size less than 100 nm, are non-porous single crystals, have defined surface chemistry, and are chemically pure. Alfa Aesar offers raw nanoparticles and dispersions from Nanophase. The dispersions in water or other liquids offer a more refined product allowing uniform distribution of material.

Synthesis Techniques

Nanoparticles are produced using one of two methods, Physical Vapor Synthesis (PVS) or NanoArc Synthesis (NAS).

Physical Vapor Synthesis (PVS)

In the PVS process, arc energy is first applied to a solid metal precursor in order to generate a vapor at high temperature. A reactant gas is then added to the vapor, which is then cooled at a controlled rate and condenses to form nanoparticles. The nanomaterials produced by the PVS process consist of discrete, fully-dense particles of defined crystallinity. This method typically produces particles with average sizes ranging from 8-75 nm.

NanoArc Synthesis (NAS)

Like the PVS process, the NAS process uses arc energy to produce nanoparticles. The NAS process, however, is capable of using a wide variety precursor formats and chemical compositions, thereby greatly expanding the number of materials that can be manufactured as nanopowders at commercial scale.

Nanoparticle Dispersions

In many cases, the successful application of nanoparticles in a particular application depends upon the ability to properly disperse the nanoparticles into a fluid. Application areas as diverse as cosmetics, coatings, polishing and catalysis all require that the particles are initially well dispersed and that the particles stay well dispersed (i.e. do not aggregate or "crash out" in the application environment) in order to exhibit their full activity. To meet this need, Nanophase has developed technology to permit the dispersion of its nanoparticles in water and a variety of polar and non-polar organic fluids. This technology provides a supply of concentrated, ready-to-use nanoparticle dispersions, eliminating the need for customers to disperse the nanoparticles themselves. This capability proves particularly attractive to customers who lack the equipment to prepare dispersions or wish to avoid handling dry powders.

Alfa Aesar offers Nanophase nanoparticles in dispersions and in the raw powder form.

For a complete list of Nanophase powders and dispersions, visit the Alfa Aesar web site at http://www.alfa.com/Alf/Product Indexes/Alfa_Complete/nano.html.

To request a copy of the Nanoparticles and Dispersions brochure, click here.

To view a pdf version of the Nanoparticles and Dispersions brochure, please go to http://www.alfa.com/alf/marketingdownloads.html

Source: Alfa Aesar

For more information on this source please visit Alfa Aesar

Date Added: Oct 27, 2006 | Updated: Jun 11, 2013
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