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ACS Nano, 2017, 11 (10), pp 10509–10518
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Chirality Assignment Program of SWCNT CodeFactor


This is the source code of the website described in ACS Nano, 2017, 11 (10), pp 10509–10518, as an encapsulation of the chirality determining function of the bilayer graph. However, the assignment logic is not described in the paper, which is implemented here, and may be updated at any time.

The official release of this project is hosted at: =>

A (maybe fallback) version is available if our server is down: =>


View the paper and site above (with tutorial videos) for details.


Use any of the current versions of Visual Studio to build and run on localhost, if you would like to work offline.

The .NET Framework version is 4.6.1.

This project is not intended to be built and run on any other operating system except Windows.


We noticed there are several clones/downloads of this project source code. We would like to re-state that,

The Nanomaterials & Nanostructures Group, Peking University disclaims any warranty or liability of the version built offline/modified, especially when the copy is not in update with the latest version on the website listed above, as described in LICENSE.

And, in addition to the LICENSE (GPL-3.0),

The original part of this project is NOT ALLOWED FOR ANY COMMERCIAL OR PATENT USE. In addition, ANY DISTRIBUTION OF THE MODIFICATION SHOULD ASK The Nanomaterials & Nanostructures Group, Peking University FOR PERMISSION, WHERE "distribution" is defined as publishing the built website, "modification" is defined as modifying/reinterpreting/rewriting the original part, "origial part" is defined as all functions, procedures or other code fragments in all C# source (*.cshtml/*.cs) and main.js in the project, no matter if it is source, rewritten in any other language or built.

Contact for further technical details or permission.