SPI Supplies is proud to now offer SMART Grids with silicon
nitride membranes for high resolution imaging of low contrast materials using TEM. SMART SiN functionalized grids enable
rapid, reliable, and quality sample preparation.
SMART SiN Grids employ state-of-the art microfabrication techniques that allow for the deposition of ultra-low
stress silicon nitride (Si3N4) membrane windows on sturdy Si substrates to provide the lowest background of any
silicon-based membrane grids. The nitride membranes are chemically resistant and surprisingly robust given their
extreme thin-ness. In addition, we have developed proprietary processing technology that allows us to
access many of the same surface functionalities that we offer for our SiO2 membranes.
SMART SiN Grids are now available with 15 nm ultra-flat membranes on 100 um thick Si substrates
in the same three standard configurations as is available for our SiO2 membrane grids. These grids fit in any
standard TEM grid holder. SMART SiN Grids are available with both functionalized surfaces to enhance sample
prepration or as the native (non-functionalized) nitride membrane.
In addition, we have SMART SiN grids available in 5 nm and 20 nm membranes with custom geometry as shown in the
image on the right. The grids are 3.5 mm square and 300 ?m thick with four 60 x 100 ?m nitride membranes. These
grids will fit in all FEI single tilt holders, but not all standard TEM holders from other manufacturers.
As with our SiO2 membrane SMART Grids, SMART SiN Grids can be used in a variety of applications and with an
assortment of analytical methods. They are an excellent choice for materials including single-walled carbon
nanotubes, carbon black, latex spheres, virus-like particles, dendrimers, as well as a range of inorganic materials
and particles. SMART SiN Grids are the preferred substrate for electron energy loss spectroscopy due to their low
absorption, but can also be used with SEM, STEM, AFM, and other surface analytical techniques.
To order SMART Grids™, please make your selection below. For assistance in selecting the correct window
size and thickness for your applications, see our configuration page.