Innovative experimental nanotech TEM supports
Substratek™ TEM Substrates are ultrathin metallic support films on standard 3mm TEM grids. These metallic films are specially manufactured with a patented process (US Patent #7348570 B2, March 25, 2008) as experimental platforms and are electron transparent to allow for imaging using a TEM. The ultrathin Substratek™ TEM Substrates enable electrochemical processing, crystal growth, and nano- and micro-fabrication directly on the substrates. They allow for subsequent TEM examination without the need for extensive sample preparation. Direct nanoscale imaging without extensive TEM preparation does not require expensive thinning tools, it saves time and it avoids introduction of preparation artifacts. Compared to the widely used carbon support films, ultrathin and electron transparent metallic films have a high surface energy and therefore more suitable for fabrication processes.
The Substratek™ TEM Substrates are metallic ultrathin films on a standard 3mm TEM grid. Available substrate are Au, Pt, Pd (2-3nm thickness) and TiOx (10-20nm thickness) on 300 and 400mesh TEM grids. The Au, Pt and Pd substrates are deposited on gold TEM grids compatible with electrochemical processes. The TiOx substrate is deposited on copper TEM grids; These materials have proven to be stable substrates with a small feature size in the support film. The TiOx substrate is more bio-compatible and can also be used for life-science applications. They are supplied in a PELCO® 160 TEM grid box in quantities of 25 per box.
TEM substrates on 400 mesh TEM grids
G400: Pitch 62µm; Hole Width 37µm; Bar Width 25µm; Transmission 37%
21410-25 - Substratek™, 2-3nm Pt on 400 mesh Au TEM grid, pkg/25
21420-25 - Substratek™, 2-3nm Au on 400 mesh Au TEM grid, pkg/25
21430-25 - Substratek™, 2-3nm Pd on 400 mesh Au TEM grid, pkg/25
21440-25 - Substratek™, 10-20nm TiOx on 400 mesh Cu TEM grid, pkg/25
Gold is an electron dense material and has relatively large background features (similar to silver). However, gold is one of the most studied materials and is often used for comparison. Au substrates are also often used in material science studies. The 2nm thin Au substrate is sufficiently electron transparent to enable TEM examinations.
Au substrate, 2nm.
Platinum, though a 3rd row transition metal, forms such small grain sizes that a thin film is surprisingly electron transparent and yet still has good conductivity. A good substrate to work with and quite robust. Useful for catalyst studies.
Pt substrate, 2nm.
Palladium is an excellent substitute for platinum. It is more electron transparent with small feature sizes, but it is less electrically conducting. Palladium is currently being investigated as a substitute for gold in integrating circuits for its lower price. Other research fields are catalyst studies and hydrogen storage.
Pd substrate, 2nm.
The titania substrates are 10-20nm thick and have a very fine grain size. Titania particles are used in countless applications. Both titanium and titania (titaniumoxide) are considered biologically compatible materials and can be incorporated into living tissue. Titanium implants are used as solid body implants. Titania particles are used for cosmetic lotions and sunscreens. It is also widely used in high end paints for the automotive and aerospace industry. The titania films offer an excellent substrate to study crystal growth and interactions of other materials with TiOx.