QUANTIFOIL® with Square Holes

QUANTIFOIL® Holey Carbon Film supports with square holes maximize the amount of open area on the grid, while retaining mechanical stability, by having relatively narrow bars. By adding a thin additional layer of carbon, these grids can be used for samples that are not stable in unsupported ice, for example fragile macromolecular complexes. The large open areas are also popular for materials science applications.

The S 7/2 arrangement (7 μm holes, 2μm bars) is the most popular choice as the spacing is well suited to the highest magnifications.

Additional Ultrathin Carbon Layer

Improve data quality by adding an ultrathin continuous carbon layer to most QUANTIFOIL® Holey Carbon Film supports. Read more.


Common QUANTIFOIL® Holey Carbon Film support square hole arrangements are shown in the table below.

QUANTIFOIL® type Hole size in µm Spacing in µm Period in µm
S 7/2 7 2 9
S 35/10 35 10 45

Contact us

Got a question or want to order?
Get in touch