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SPI Supplies® Brand Molybdenum Grids for TEM

For in-the-TEM in situ high temperature studies



Chinese




Molybdenum

Use molybdenum grids for TEM studies when high temperature and inertness are needed. "Moly" grids are sometimes used in conjunction with certain ion milling recipes since the etching rate under ion milling conditions is very low. The carbon coating of molybdenum grids typically is a bit more of a challenge, especially to the inexperienced, and therefore, SPI Supplies offers a complete grid coating service, providing grids custom coated with carbon, holey carbon, Formvar, etc. All grids shown on this page are made to a specification for the outer diameter of 3.05 mm

Grids are available in both square hole and also, circular hole style mesh. All grids have a thickness of 0.03 mm (30 Ám/0012"). This thickness corresponds to the lowest cost production (and highest yield) and is quite an acceptable thickness for most users. However, on occasion, we are asked if we can produce thinner grids. And the answer is "yes, but", meaning that yes, we can make thinner grids, but the yield goes down and the cost goes up. The thinnest grids we can make are 0.01 mm (10Ám/0.0004"). Such grids are made on special order, minimum of twenty vials of 100 grids, and the cost is typically 35% higher than the 10+ vial pricing. Such special order grids requirement payment in advance as once started there are no changes or cancellations permitted. Let us know your requirements so that we can help you sort this out!

Are you doing ion milling?
While some of the SPI TEM grid patterns in molybdenum have applications in ion milling, the product that has been developed specifically for this application would be the SPI "moly rings".

Are you doing Tripod polishing?
For the support of the specimen, we recommend the SPI "Moly" half rings.

Are you doing cryo-TEM?
The use of molybdenum grids has been well documented by those doing cryo-TEM work. Since the coefficient of contraction for a carbon coating is almost identical with that of molybdenum metal, it is possible to avoid the frustrating phenomenon of "cryo-crinkling". This means that thin molecular crystals, both natural as well as synthetic, will really be "flat" and normal to the beam and one would expect to get far more reflections than would otherwise be the case. See the publication by J. Vonck, Ultramicroscopy 5, 123-129 (2000).

Not all moly grids are the same!
In the case of moly TEM grids, thinner is almost always better. This is especially true for those doing tilting experiments. For example, if you are using the 30 Ám thick SPI moly grids, and are doing work that requires tilting of the specimen, you have have much more area available for viewing than if you are using 50 Ám thick grids, which would come from other sources. It is more difficult to make the thinner grids, yields are lower, but we offer only the best moly grids, those that are only 30 Ám thick. Note that the thickness of the 300 and 400 mesh square mesh grids are only 22 Ám thick. There is also the question of purity: The molybdenum foils used to make the grids are 99.9% pure molybdenum.

Diameter:
All grids on this page have an outside diameter of 3.05 mm.

Orthogonal (square) mesh:
Mesh
Size
SPI
Part #
Aspect
Ratio
Hole
Diameter
(Ám)
Open
Area
(%)
Mesh
Pitch
(Ám)
Bar
Width
(Ám)
Each10+,
Each
30+,
Each
In Stock
50 mesh
Pkg 25
4050M-CF 47070500 30 $ 57.79 $ 52.01 $ 49.12 Add to cartYes
70 mesh
Pkg 100
4070M-MB *3006535050  183.63  165.27  156.09 Add to cartYes
100 mesh
Pkg 100
4110M-MB *2106525040  324.45  292.01  275.78 Add to cartYes
150 mesh
Pkg 25
4150M-CF1503516933    59.65 Add to cartNo
200 mesh
Pkg 25
4120M-XA1005512525    57.79 Add to cartYes
300 mesh
Pkg 25
4030M-CF   57.79  52.01  49.12 Add to cartYes
400 mesh
Pkg 25
4040M-CF   75.87  68.28  64.49 Add to cartYes
Available while supplies last!

Circular mesh
Mesh
Size
SPI
Part #
Aspect
Ratio
Hole
Diameter
(Ám)
Open
Area
(%)
Mesh
Pitch
(Ám)
Bar
Width
(Ám)
Each10+,
Each
30+,
Each
In Stock
50 mesh
Pkg 100
4205M-MB *4507560$ 201.98$ 181.78$ 171.68 Add to cartYes
70 mesh
Pkg 100
4200M-MB *3207030  201.98  181.78  171.68 Add to cartYes
100 mesh
Pkg 100
4210M-MB *2206030  201.98  181.78  171.68 Add to cartYes
400 mesh
Pkg 100
4240M-MB *455514  403.26  362.93  342.77 Add to cartYes
Available while supplies last!
Slotted Grids, 30 Ám thick
Mesh
Size
SPI
Part #
Aspect
Ratio
Hole
Diameter
(Ám)
Open
Area
(%)
Mesh
Pitch
(Ám)
Bar
Width
(Ám)
Each10+,
Each
30+,
Each
In Stock
2 x 1 mm
Vial 25
4260M-CF  86.26  77.63  73.32 Add to cartYes
2 x 0.4 mm
Vial 25
4290M-CF  82.53  74.28  70.15 Add to cartNo
1.5 x 0.2 mm
Vial 100
4270M-MB *  180.41  162.37  153.35 Add to cartYes
0.5 x 0.2 mm
Vial 100
4280M-MB *  180.41  162.37  153.35 Add to cartYes

Aperture Grids, 30 Ám thick
Also available, molybdenum rings for ion milling.
Mesh
Size
SPI
Part #
Aspect
Ratio
Hole
Diameter
(Ám)
Open
Area
(%)
Mesh
Pitch
(Ám)
Bar
Width
(Ám)
Each10+,
Each
30+,
Each
In Stock
Hole size: 0.6 mm
Vial 25
4296M-CF  82.53  74.28  70.15 Add to cartNo
Hole size: 0.6 mm
Vial 100
4296M-MB *  330.11  297.10  280.59 Add to cartYes
Hole size: 0.8 mm
Vial 100
4297M-MB *  180.41  162.37  153.35 Add to cartYes
Hole size: 1.0 mm
Vial 25
4298M-CF  330.11  74.28  70.15 Add to cartNo
Hole size: 1.0 mm
Vial 100
4298M-MB *  330.11  297.10  280.59 Add to cartYes
Hole size: 1.5 mm
Vial 100
4121M-MB  180.41  162.37  153.35 Add to cartYes
Moly "half rings"
Vial 100
4119M-MB  177.04  159.34  150.48 Add to cartYes


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Wednesday November 26, 2014
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