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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1000 mesh calibration grid AGS1965A single 1000 mesh 3mm diameter TEM grid for calibration. Supplied in a vial.In Stock£13.90In Stock
Fine meshThis 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 28 days
From £18.03Average lead time: 1 to 28 days
Electroformed mesh - NickelElectroformed 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 £417.26Average lead time: 7 to 70 days
Electroformed mesh - CopperElectroformed 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 £926.11Average lead time: 7 to 35 days
Electroformed mesh - GoldElectroformed 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
POAAverage lead time: 7 days
Polystyrene latex particlesThis range of polystyrene particles is excellent for SEM calibration purposes.Average lead time: 1 day
From £18.03Average lead time: 1 day
Polystyrene latex spheresThis range of polystyrene latex spheres can be used for either SEM or TEM applications.Average lead time: 21 to 30 days
From £20.87Average lead time: 21 to 30 days
Chessy test specimen AGS171The Chessy test specimen comprises more than 1.6 million gold squares on silicon which form a four-fold chequerboard pattern in an area of 5mm square.Average lead time: 14 days£1,097.84Average lead time: 14 days