![]() Firstly, the coordinate system of the image usually does not coincide with the coordinate system of the design file (even if the images are taken with great care a slight rotation is always present). Image processing is necessary for two reasons. The software presented here ( SVGMarks) is used to process images of graphene flakes and marks such that they can be imported into a design file. The coordinate system is used to precisely locate graphene on a chip allowing design of lithographic patterns. ![]() For this reason, patterning graphene (or any other sparse and randomly distributed set of objects) requires deposition of graphene on a prepatterned substrate containing a coordinate system (usually defined by a matrix of marks). The probability of obtaining monolayer graphene in this process is very small (a few monolayers per mm 2). ![]() Such deposited graphene flakes are randomly distributed on a chip. Nanoscale Device Group Graphene software - SVGMarksĭevices based on graphene and related 2D materials (‘graphene’ for short) are usually fabricated by patterning graphene deposited on a Si substrate by mechanical exfoliation.
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