Metals

The simplest inorganic nanomaterials are metallic with a wide range of metals already produced in nano form. These include aluminium, copper, nickel, cobalt, iron, silver and gold with a wide range of potential applications including land remediation, batteries and explosives. Metal nanoparticles have been prepared for some time, but several have found significant commercial application. These include aluminium, iron, cobalt and silver. 3.3.1 Aluminium. Aluminium nanoparticles have been used...

Federal Government Activities in Support of Safe Nanotechnology

While the NEHI has provided an effective forum for government agencies to exchange notes and experiences, there has been little direct output visible from the working group since its inception. In the light of the NEHI's coordinating function, much of the group's work is reflected in agency plans and initiatives. Certainly, a number of US federal agencies have developed a position on nanotechnology and have instituted internal nanotechnology programs since joining NEHI. What the working group...

Surface Area Concentrations

Measurements of particle surface area have been possible for some time using the BET method.30 However, it requires the collection of relatively large amounts of particles, and measurements are influenced by particle porosity (which may or may not be important) and collection support substrate -particularly where the quantity of material analysed is small. The first instrument designed specifically to measure aerosol surface area was the epiphaniometer.31 This device measures the Fuchs or...

Forbes Wolfe Nanotech Reports

Forbes Wolfe produce a monthly newsletter on nanotechnology called Nano-tech Report and at the end of each year report on the top 10 nanotech products of the year. In 2004, the products included a nanotechnology-based footwarmer containing a nanoporous aerogel, golf clubs using ''titanium fullerene materials'' in the head of their new driver, nanosilver-containing wound dressings with improved antibacterial effectiveness, an additive from BASF that improves the hydrophobicity of building...

Nanoparticle Size Distribution Measurement

3.5.1 Measuring Size Distribution using Particle Mobility Analysis. The most common instrument used for measuring size distributions of aerosols of nano-particles is the Scanning Mobility Particle Sizer SMPS . The SMPS is capable of measuring aerosol size distribution in terms of particle mobility diameter from approximately 3 nm up to around 800 nm, although multiple instruments typically need to be operated in parallel to span this range. A schematic diagram is given in Figure 6. It comprises...

Measurements of Nanoparticle Exposures in Existing Industries

Two main studies have been reported in which levels of nanoparticle exposures in existing workplaces have been assessed using instrumentation relevant for nanoparticles. In 2000, Wake42 carried out a review of industries based in the UK to identify those that produce, handle or generate nanoparticles or nano-powders, and to identify the processes that give rise to airborne nanoparticles. This was followed by short visits to a selection of those companies identified and measurements of...