SEM ACCESSORIES SEM FOR FORENSICS n Mica Sheets and Disks (continued)


coatings research, and some AFM studies where HOPG are used to taking place, the mica V-4 or V-5 is recommended. (Mica must always use freshly cleaved surfaces).


For AFM and SPM calibration, V-1 or V-2 is recommended.


However, we believe that it is important that you know what kind of mica is being used in your lab. The information on the mica is given above should be used to make your choice.


Here at EMS we try to stock a variety of sizes with different thicknesses and classifications of quality for convenience.


Ordering Information Muscovite Mica V-1 Quality: Cat.#


71855-01


71855-01-10 71855-05


71855-05-10 71855-10


71855-10-10 71855-11


71855-11-10 71855-15


71855-15-10 71856-01


71855-01-10 71856-02 71856-03 71856-04


71857-01


71857-01-10 71857-05


71857-05-10 71857-10


71857-10-10 71857-11


71857-11-10 71857-15


71857-15-10 71858-01


71858-01-10


Muscovite Mica V4 Quality: Cat.#


Mica Size


71853-01 71853-05 71853-10 71853-11 71853-15 71854-01 71854-15


71850-01 71851-05 71850-10 71850-11 71850-15 71852-01


50mm x 75 mm V-4 25mm x 75mm 25mm x 25mm 25mm x 25mm 15mm x 15mm 9.5mm Diameter 12.7mm Diameter


Muscovite Mica V5 Quality: Cat.#


Mica Size


50mm x 75 mm V-5 25mm x 75mm 25mm x 25mm 25mm x 25mm 15mm x 15mm 9.5mm Diameter


Mica Size 50 x 75mm


25 x 75 mm 25 x 25 mm 25 x 25 mm 15 x 15 mm


9.5 mm Diameter 12 mm Diameter


15 mm Diameter 20 mm Diameter


Muscovite Mica V2 Quality: Cat.#


Mica Size 50 x 75mm


25 x 75 mm 25 x 25 mm 25 x 25 mm 15 x 15 mm


9.5 mm Diameter


Quality Thickness (mm) Pack V-1


V-1 V-1 V-1 V-1 V-1 V-1


V-1 V-1


0.15 – 0.21 0.26 – 0.31 0.15 – 0.21 0.26 – 0.31 0.15 – 0.21 0.15 – 0.21


each


10/pk each


10/pk each


10/pk each


10/pk each


10/pk each


10/pk


0.15 – 0.21 10/pk 0.15 – 0.21 10/pk 0.15 – 0.21 10/pk


Quality Thickness (mm) Pack V-2


V-2 V-2 V-2 V-2 V-2


0.15 – 0.21 0.26 – 0.31 0.15 – 0.21 0.26 – 0.31 0.15 – 0.21 0.15 – 0.21


each


10/pk each


10/pk each


10/pk each


10/pk each


10/pk each


10/pk


Quality Thickness (mm) Pack 0.15 – 0.21 10/pk 0.26 – 0.31 10/pk 0.15 – 0.21 10/pk 0.26 – 0.31 10/pk 0.15 – 0.21 10/pk 0.15 – 0.21 10/pk 0.15 – 0.21 10/pk


V-4 V-4 V-4 V-4 V-4 V-4


Quality Thickness (mm) Pack 0.15 – 0.21 10/pk 0.26 – 0.31 10/pk 0.15 – 0.21 10/pk 0.26 – 0.31 10/pk 0.15 – 0.21 10/pk 0.15 – 0.21 10/pk


V-5 V-5 V-5 V-5 V-5


n Conductive Carbon Adhesive Tabs


Standard Carbon Conductive Adhesive Tabs – Tabs are formed by two sides of thick conductive adhesive (45 µm on each side) with the center conductive core film (35 µm). With the total thickness of 125 µm, these tabs will offer reasonably firm, smooth surfaces for a variety SEM applications, including gunshot residue analysis. Tabs are protected by white liners, which do not have to be removed when samples are ready to be mounted.


z No out-gassing z Conductive adhesive is carbon filled acrylic glue z Solvent free


z Adhesive can be removed by ethyl acetate, ethanol, isopropyl alcohol or alcohols


z Service temperature is up to 60ºC (140ºF) Tabs contain some traces of Si, Sb, S, Fe, Mg, Na.


Thick Carbon Conductive Tabs or Image Tabs – The stiff and smooth surface conductive tabs are 260 µm thick, including 200 µm thick conductive carbonate base, coated 30 µm thick on each side with conductive adhesive. However, these tabs are not as conductive and sticky as the Standard Carbon Conductive Tabs. Thick Carbon Conductive Tabs are used for photographic background as well as for Jet Scan applications, where the tabs must be removed and filed away.


Ultra-Thin Carbon Conductive Adhesive Tabs – These tabs have Core material which is nonconductive cloth (70 µm) with Carbon Filler Conductive Adhesive (2 x 45µm). Total thickness is 160 µm.


Spectro Grade Carbon Adhesive Tabs – High purity conductive carbons for less interference signals, such as X-Ray analysis.


Ultra-Smooth Carbon Adhesive Tabs – Carbon adhesive tabs that eliminate issues with rough surfaces, insufficient tackiness, and hardness with significantly lower contaminant levels under EDS. Tabs are made in USA and very popular, and may be used in place of other conductive adhesive in many applications in conventional and field emission microscopes. They are also widely used in forensic laboratories for study of gunshots residues. Without the addition of conductive coating, small nonconductive particles can often be imaged and X-Ray analyzed, cutting down your analysis time. These tabs are composed of a thin film of strong adhesive approximately 1


⁄2 " diameter. Over 99%


transparent to EDS, with a very small amount of nickel (0.6%) and copper (< 0.3%).


Refrigeration will increase shelf life but tabs need to be warmed up to room temperature before use (usually more than one hour)


Cat. #


77825-06 77825-09 77825-12 77825-25 77824-12


77825-12-SP 77826-12 77827-12 77827-25


Description


Standard Carbon Adhesive Tabs, 6mm Dia. Standard Carbon Adhesive Tabs, 9mm Dia. Standard Carbon Adhesive Tabs, 12mm Dia. Standard Carbon Adhesive Tabs, 25mm Dia. Thick Carbon Conductive Tabs, 12mm Dia. Ultra Thin Carbon Adhesive Tabs, 12mm Dia.


Qty.


100/pk. 98/pk.


100/pk. 54/pk.


100/pk. 200/pk.


Spectro Grade Carbon Adhesive Tabs, 12mm Dia. 120/pk. Ultra-Smooth Carbon Adhesive Tabs, 12mm 100/pk. Ultra-Smooth Carbon Adhesive Tabs, 25mm


50/pk.


Electron Microscopy Sciences In PA: (215) 412-8400 • Toll-Free (800) 523-5874 Fax (215) 412-8450 or 8452 • email: sgkcck@aol.com or stacie@ems-secure.com • www.emsdiasum.com


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