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Agar Scientific specialises in producing a wide range of specimens specifically for SEM test and calibration where quantification or high resolution results are required.

 

SEM resolution is tested in terms of a combination of criteria, namely resolved gaps and the number of grey levels in the image. This is to ensure that the resolution has not been distorted by using the contrast to maximise visibility of edges. High resolution images ideally should show fine detail together with a lack of noise, evidenced by a good range of grey levels.

For assessments of resolution in scanning electron microscopes, we have developed a range of gold on carbon and tin on carbon test specimens. These specimens are suitable for tests of SE and BSE imaging and also for chemical mapping in high resolution systems such as in Auger scanning instruments. The specimens can be supplied on most types of specimen stub.

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  1. Boron substrates for SEM/EDX micro analysis
    Diamond polished, crystalline boron surfaces for semi-quantitative SEM/EDX analysis of carbonaceous samples, e.g. soot.
    Average lead time: 30 days

    From £362.47

    Average lead time: 30 days
  2. 1000 mesh calibration grid AGS1965
    A single 1000 mesh 3mm diameter TEM grid for calibration. Supplied in a vial.
    In Stock
    £14.32
    In Stock
  3. Fine mesh
    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 µm.
    Average lead time: 1 to 14 days

    From £18.57

    Average lead time: 1 to 14 days
  4. Electroformed mesh - Nickel
    Electroformed mesh in Nickel with an approximate thickness of 5 micron. Available 5, 20, 70, 80, 100, 200, 333, 400, 500, 750, 1000, 1500 and 2000 mesh sizes.
    Average lead time: 7 to 70 days

    From £429.78

    Average lead time: 7 to 70 days
  5. Electroformed mesh - Copper
    Electroformed mesh in Copper with an approximate thickness of 5 micron. Available 5, 20, 70, 80, 100, 200, 333, 400, 500, 750, 1000, 1500 and 2000 mesh sizes.
    Average lead time: 7 to 35 days

    From £953.89

    Average lead time: 7 to 35 days
  6. Electroformed mesh - Gold
    Electroformed mesh in Gold with an approximate thickness of 5 micron. Available 5, 20, 70, 80, 100, 200, 333, 400, 500, 750, 1000, 1500 and 2000 mesh sizes.
    Average lead time: 7 days

    POA

    Average lead time: 7 days
  7. Polystyrene latex particles
    This range of polystyrene particles is excellent for SEM calibration purposes.
    Average lead time: 1 day

    From £18.57

    Average lead time: 1 day
  8. Glass size standards
    Glass microspheres can be used in any application that requires a NIST traceable size standard with a narrow size distribution, and where sample conditions may not be suitable for polystyrene spheres.
    Average lead time: 7 to 30 days

    From £483.05

    Average lead time: 7 to 30 days
  9. Gold on carbon AGS1969 - high resolution test specimen
    High resolution test specimen with a particle size range from approximately 3 - 50nm.
    Average lead time: 1 to 45 days

    From £105.35

    Average lead time: 1 to 45 days
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PRICE & AVAILABILITY: Please note that while we are working closely with our suppliers to minimise any global supply chain issues, prices and availability may be subject to change at short notice.
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