HOPG Substrates – Highly Ordered Pyrolytic Graphite

 

HPOG Graph

Overview

HOPG – Highly Ordered Pyrolytic Graphite is a very pure and highly ordered form of synthetic graphite. It is characterized by by the mosaic spread angle.  HOPG is a laminar material and consists of layered poly crystals resembling a mosaic of mono crystals grains which are slightly disorientated with respect to each other. The size of the individual crystals varies from 1-10um. A lower mosaic spread angle represents a better alignment of the graphite crystals. The best HOPG samples have a mosaic spread value of less than 1 degree. The freshly cleaved HOPG substrates provides atomically flat areas which are used as a specimen substrate and for magnification calibration in scanning probe microscopy techniques (AFM, SPM, STM). Similar to mica,  fresh surfaces can be made by cleaving the samples. 

HOPG is made by annealing graphite under pressure at temperatures over 3000°C. This conductive material is stable up to 2000°C.° 

Available in three qualities with 0.4, 0.8 and 3.5 degrees mosaic spread. Sample size is 10x10mm and thickness is 1 or 2 mm. The samples are all double sided which means that the full thickness can be used and they can be cleaved from both sides.

HOPG  grade specifications

 Grade  ZYA  ZYB  ZYH
 Product #  RS-MN-10-008311 / RS-MN-10-008322  RS-MN-10-008333  RS-MN-10-008341 /RS-MN- 10-008342
 Mosaic Spread  0.4°  0.8°  1.5°
 Accuracy 0.1°   0.2°  1.5°
 Sides  Double  Double  Double
 Thickness 1 or 2mm   1mm  1mm
 Chip size  10 x 10mm  10 x 10mm 10 x 10mm 
 Application  SPM, STM, AFM, X-ray  Same  Same 

 

 

     

ZYA grade HOPG, 0.4°mosaic spread, double sided, 10 x10 x 1mm chip

10 008311 10 008322 10 008333 10 008341 10 008342

Product Part Number Price
ZYA grade HOPG, 0.4°mosaic spread, double sided, 10 x10 x 1mm chip RS-MN-10-008311 $809.32 each

ZYA grade HOPG, 0.4°mosaic spread, double sided, 10 x10 x 2mm chip

10 008311 10 008322 10 008333 10 008341 10 008342

Product Part Number Price
ZYA grade HOPG, 0.4°mosaic spread, double sided, 10 x10 x 2mm chip RS-MN-10-008322 $1,199.99 each

ZYB grade HOPG, 0.8°mosaic spread, double sided, 10 x10 x 1mm chip

10 008311 10 008322 10 008333 10 008341 10 008342

Product Part Number Price
ZYB grade HOPG, 0.8°mosaic spread, double sided, 10 x10 x 1mm chip RS-MN-10-008333 $209.32 each

ZYH grade HOPG, 3.5°mosaic spread, double sided, 10 x10 x 1mm chip

10 008311 10 008322 10 008333 10 008341 10 008342

ZYH grade HOPG, 3.5°mosaic spread, double sided, 10 x10 x 2mm chip

10 008311 10 008322 10 008333 10 008341 10 008342

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