Products
TEM/STEM Test Specimens
Polystyrene Latex Spheres
Used as a magnification test specimen in TEM and SEM, but is also employed in particle counting devices as a size check and focus aid.
Covers m to nm range.
Offered in a 10ml size, at 0.1% weight by volume.
Specific gravity is 1.05 g/ml.
| Sphere Size, Size Deviation, Sphere Density Table | |||
| Prod. No. | Nom Size ( m) | Size Uniformity (C.V.) | Approx. Spheres/cc |
|---|---|---|---|
| 610-03 | 0.03 | ≤30% | 6.741 x 1013 |
| 610-08 | 0.08 | ≤18% | 3.55E x 1012 |
| 610-10 | 0.09 | ≤15% | 2.50 x 1012 |
| 610-14 | 0.17 | ≤5% | 3.70 x 1011 |
| 610-17 | 0.26 | ≤3% | 1.04 x 1011 |
| 610-20 | 0.30 | ≤3% | 6.74 x 1010 |
| 610-30 | 0.49 | ≤3% | 1.55 x 1010 |
| 610-38 | 1.00 | ≤3% | 1.82 x 109 |
Note: actual size will appear on product label
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 610-03 | Latex Spheres, 0.03 m, nom |
10ml | € 23,30 | ||
| 610-08 | Latex Spheres, 0.08 m, nom |
10ml | € 23,30 | ||
| 610-10 | Latex Spheres, 0.09 m, nom |
10ml | € 23,30 | ||
| 610-14 | Latex Spheres, 0.17 m, nom |
10ml | € 23,30 | ||
| 610-17 | Latex Spheres, 0.26 m, nom |
10ml | € 23,30 | ||
| 610-20 | Latex Spheres, 0.30 m, nom |
10ml | € 23,30 | ||
| 610-30 | Latex Spheres, 0.49 m, nom |
10ml | € 23,30 | ||
| 610-38 | Latex Spheres, 1.00 m, nom |
10ml | € 23,30 | ||
| 610-SET | Latex Spheres, set of 3 |
10ml | € 62,40 |
Combined TEM Test Specimen – Gold / Graphitized Carbon
A holey carbon film is shadowed with gold and graphitized carbon particles are deposited.
These particles viewed over the holes may be used for assessment of factors limiting the microscope performance.
The evaporated gold forms small polycrystalline islands and within these islands lattice fringes can be resolved.
This specimen is also used for contamination measurement rates in the electron microscope by noting the deposition rate of carbon within the holes found in the gold film.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 638 | Combined TEM Test Specimen on 3mm grid |
Each | € 143,30 |
Diffraction Standard – Camera Length
Evaporated Aluminum
The nominal value of the effective camera length of an EM operating in the selected area mode is not sufficiently accurate for calculations of lattice spacing.
The actual value of camera length must be calibrated at the same accelerating voltage and objective lens setting by reference to a known substance with well defined diffraction spacings.
A normal specimen is evaporated film of aluminum with a thickness of around 31nm.
Very small crystallite size yields ring patterns suitable for calibration. The specimen is supplied with a list of the principal lattice spacings.
Made on a G400, 400 square mesh copper Gilder grid.
Technical Note
 |
Download Technical Note |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 619 | Evaporated Aluminum on 3mm grid |
Each | € 36,00 |
Image Rotation
Molybdenum Trioxide
When changing from a selected area image of a specimen to a diffraction pattern, the strength of the intermediate lens is changed, producing an image rotation between the image and the diffraction pattern.
This rotation is seen by photographing a crystal whose shape gives a clear indication of orientation.
A molybdenum trioxide crystal is suitable for this purpose.
Supported on a G400, 400 square mesh copper Gilder grid.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 625 | Molybdenum Trioxide, on 3mm grid |
Each | € 27,80 |
500nm Magnification Calibration Diffraction Grating Replica
Carbon replica with Au/Pd shadowing on a cross line grating with well-defined trench type grooves.
Pitch or “d” spacing for parallel line grating is 500nm.
The trench type groove makes it easy to measure the pitch.
Typically, cross line grating is used up to 100,000x with 2,000 lines/mm in both directions.
Instructions included.
Made on a G400, 400 square mesh copper grid.
Technical Note
|
Download Technical Note |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 677 | 500nm Grating Replica, Cross line grating, 2000 l/mm, on 3mm grid |
Each | € 66,80 |
500nm Diffraction Grating Replica with Latex Spheres
magnification calibration specimen
Two-in-one; this standard for calibration provides a double-check of the accuracy of magnification calibration.
It is particularly useful at higher magnification; up to 150,000x.
The latex sphere size is 261nm and the carbon cross line grating replica with Au/Pd shadowing has a pitch or “d” spacing of 500nm or 2000 lines/mm.
Replica has well-defined trench type grooves, which makes it easy to measure the 500nm pitch.
Supplied on a G400, 400 square mesh copper grid.
Technical Note
|
Download Technical Note |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 673 | 500nm Diffraction Grating Replica with Latex Spheres, 2000 l/mm, on 3mm grid |
Each | € 67,40 |
Magnification Calibration
Diffraction Grating Replicas
Carbon replicas with Au/Pd shadowing of diffraction line gratings, parallel line, waffle pattern gratings.
Made on a G400, 400 square mesh copper Gilder grid.
Typically, parallel is used up to ~40-50,000x, while the waffle is used up to ~80-100,000x.
Parallel line gratings are 2,160 lines/mm (54,864 lines/inch).
The waffle is 2,160 lines/mm in both directions.
Line or “d” spacing for parallel line grating is 462.9nm.
Instructions included.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 606 | Grating Replica, Parallel, 2160 l/mm, on 3mm grid |
Each | € 64,40 | ||
| 607 | Grating Replica, Waffle, 2160 l/mm, on 3mm grid |
Each | € 77,80 |
Diffraction Grating Replica with Latex Spheres
magnification calibration specimen
Two-in-one; this standard for calibration provides a double-check of the accuracy of magnification calibration.
It is particularly useful at higher magnification.
The latex sphere size is 0.261 m and the carbon grating replica with Au/Pd shadowing is 2160 lines/mm.
Supplied on a G400, 400 square mesh copper Gilder grid.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 603 | Diffraction Grating Replica and Latex Calibration Standard |
Each | € 73,20 |
Gold Shadowed Latex
These are latex particles of 0.204 m diameter shadowed with a fairly heavy coating of gold.
The gold forms islands of strongly scattering material and produces a suitable test object for STEM.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 628-B | Gold Shadowed Latex, 3.05mm grid |
Each | € 97,10 |
Perforated carbon film, 3.05mm grid
This specimen is one of the quickest and easiest to use for performance checks since it gives information about nearly all causes of loss of resolution.
The Agar Scientific perforated carbon films yield holes small enough to be imaged at an instrumental magnification of x200,000.
If these holes are not present in a grid square they will be found in an adjacent square.
The holes are round, with smooth unthickened edges. Perforated carbon films are thin films of carbon which have been treated to obtain a large number of small holes.
The examination of the Fresnel fringe around a hole when the objective lens is slightly defocused enables the astigmatism to be corrected.
The clarity of the fringe also gives information about the mechanical and electrical stabilities and available resolution of the instrument.
When higher resolution equipment is used, the slightly underfocused image of the carbon film itself is used for astigmatism correction.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| S100 | Perforated carbon film, 3.05mm grid |
Each | € 35,00 |
This is available in copper, nickel or gold, in 1000, 1500 and 2000 mesh (1000, 1500 or 2000 repeat distance per inch), ie. 25, 18.75 and 12.5 m.
This material is not claimed to be of high accuracy over any one cell spacing.
An average over at least 20 spacings should be taken to give reasonable accuracy.
The mesh is available in 25 mm squares.
The mesh can also be provided as a sandwich in a folding 3.05mm coarse mesh grid for SEM users.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| AGG248N | Fine Wire Mesh Nickel 1000 Mesh |
Each | € 86,00 | ||
| AGG248A | Fine Wire Mesh Gold 1000 Mesh |
Each | € 324,50 | ||
| AGG243C | Fine Wire Mesh Copper 1500 Mesh |
Each | € 196,20 | ||
| AGG243N | Fine Wire Mesh Nickel 1500 Mesh |
Each | € 107,60 | ||
| AGG243A | Fine Wire Mesh Gold 1500 Mesh |
Each | € 303,20 | ||
| AGG249N | Fine Wire Mesh Nickel 2000 Mesh |
Each | € 105,50 | ||
| AGS151 | 1000 Mesh Copper in sandwich grid 3mm |
Each | € 31,00 | ||
| AGS151-5 | 1500 Mesh Copper in sandwich grid 3mm |
Each | € 31,80 |
High resolution test specimen gold particles on carbon film
An arrangement of finely dispersed thin gold particles has an advantage over single crystal gold foil for tests of high resolution imaging capabilities in TEM.
As with gold foil, image quality, magnification and instrumental stability are readily assessed, however, this gold particle specimen is superior for the determination of resolution capabilities since it offers a choice of crystalline orientations on static or low tilt stages.
In addition, the thickness of the crystalline material is easily calculated from the projected shape of the gold crystal.
The background noise arising from structure in the support film helps with determinations of the operating transfer function.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| S132 | High resolution test specimen gold particles on carbon film |
Each | € 72,50 |
