Vary Band Gap in Graphene Nanoribbon for Transistor Research

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Discussion Overview

The discussion centers on varying the band gap in graphene nanoribbons (GNR) for transistor research. Participants explore techniques for manipulating the band gap through edge chirality and width, as well as the challenges associated with these methods.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant, Vinoth, seeks guidance on varying the band gap in GNR for a research project.
  • Another participant suggests that the band gap can be varied by the "chirality" of the edge and the width of the GNR, referencing a conference for further information.
  • Vinoth expresses confusion about how to vary the width of GNR and requests techniques for reshaping edges and information on the electronic structure of graphene.
  • A participant notes that shaping GNR is a complex task at the forefront of science and suggests unzipping defined chirality nanotubes as one method.
  • Another participant corrects themselves and references a specific paper on energy band-gap engineering of GNR, highlighting its significance in the field.
  • Vinoth indicates a plan to simulate GNR-based transistors using software, rather than fabricating them.
  • A later participant requests a book on graphene to assist with calculating band structures.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and approaches to the topic, with no consensus on specific methods for varying the band gap or the best resources for further study. Multiple competing views and uncertainties remain regarding the techniques and challenges involved.

Contextual Notes

Participants mention the complexity of shaping GNR and the lack of standardized methods, indicating that the field is still developing. There are references to specific literature and conference proceedings, but no definitive techniques or solutions are agreed upon.

Who May Find This Useful

Researchers and students interested in graphene nanoribbons, band gap engineering, and transistor applications may find this discussion relevant.

vinothr
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i am vinoth. i am doing research project related to how we can vary the band gap in graphene nanoribbon and use it to form transistor.
now only i started for literature survey related to how we can vary the band gap in graphene nanoribbon.i need some guidance from our friends.i am waiting for your valuable reply.
 
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The bandgap is varied by the "chirality" of the edge and the width. There are several techniques available to reshape the edges, look at current conference proceedings Nanotube 2010 in Montreal had quite a bit on reshaping graphene.

http://nt10.org/NT2010_FinalProgram_AbstractBook.pdf

Look through there and follow up on groups that are of interest to you.
 
Last edited by a moderator:
Thanks for your valuable reply.that conference book useful to my project work. Actually i studied some journal they told band gap is inversely proportional to width of the graphene nanoribbon.but i am not getting idea about how to vary the width of the GNR.
could you explain some techniques to reshape the edges of GNR or please provide some journal related to reshape the edges of GNR.i need the information about electronic stucture of graphene briefly.thanks for your help.
 
This is by no means an easy or standardized task. Shaping GNR is at the forefront of science. One way is to buy nanotubes at a defined chirality and unzip them. How you place them where you want after that I have no idea. The conference proceeding I posted above had at least one talk about doing it, to my knowledge not yet published.

You should just invent your own method and publish it, at this point that would be some high impact work in the field.
 
I stand corrected, I have been researching the subject also since I am in a similar field.
Check
Energy Band-Gap Engineering of Graphene Nanoribbons
M. Han et al. PRL 07

Already cited 439 times!
 
Thanks for your information.I will study that paper energy bandgap engineering of GNR.Actually i plan to simulate GNR based transistor using advanced tool kit software.Thanks to spend some amount of time for me.i can't go upto fabrication level.i plan to do upto simulation level.
 
Hi everyone,
I need a book about graphene.Can you give me a link for download?I have to calculate it's band structures.
thank you.:smile:
 

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