HOPG ZYA Quality (7mm x 7 mm)

Description

Product Description:
ScanSens supplies with Highly Oriented Pyrolytic Graphite (HOPG). It’s a type of pure, highly laminar graphite used as an atomic-scale calibration standard for atomic force microscopy and scanning tunneling microscopy. HOPG properties as atomic plane surface and good conductivity make it the best material for STM calibration and the excellent substrate for different samples. HOPG is a material that consists of many atomic layers of carbon, highly oriented amongst each other. HOPG is manufactured at the temperature of 3273K and remains stable at the temperatures up to 2000°C in an inert environment. The parallelism of atomic layers is characterized by “mosaic spread angle”. The less this angle, the higher the quality of HOPG.

To clean and smooth the graphite sample, do the following:

• Stick a piece of the adhesive tape (slightly wider than the sample) on the surface of the graphite sample.
• Smooth it out to remove air bubbles.
• With an abrupt movement remove the adhesive tape together with the top layer of graphite. The molecular layers of graphite have a spalling angle in relation to the surface layer, at which the layers are easily removed. Therefore the smoothness of the surface will depend on the direction, in which you remove a layer. Find the best direction to obtain the smoothest surface and remember (or mark) it, to use it later for cleaning the surface of pyrolitic graphite samples.

Specifications
HOPG ZYA Quality
HOPG material, Mosaic Spread 0.3-0.5 degrees, Piece size 7mm x 7mm

GRAS/0.6x7x7
HOPG piece has a top working layer with mosaic spread 2-5 degrees and a base layer (about 0-1mm) with not specified mosaic spread quality. To mark the non-working HOPG piece side the one-side scotch is used.
Size 7mm x 7mm
Thickness of working layer 0.4-0.7 mm

GRAS/1.0x7x7
HOPG piece has a top working layer with mosaic spread 2-5 degrees and a base layer (about 0-1mm) with not specified mosaic spread quality. To mark the non-working HOPG piece side the one-side scotch is used.
Size 7mm x 7mm
Thickness of working layer 0.8-1.8 mm