1. K-State home
  2. »Research Foundation
  3. »Technologies
  4. »Patents

Research Foundation

Production of Graphene Nanoribbons with Controlled Dimensions and Crystallographic Orientation

Reference Number: 09-18

Inventors: Vikas Berry and Nihar Mohanty


Research at Kansas State University has developed a high-throughput method for enabling controlled production of graphene nanoribbons (GNRs) with predictable metallic or semiconducting electrical properties. The process can control the band gap of the GNRs by controlling its width (from 5 nm to 200 nanometers (nm) with a 1 nm resolution), and crystallographic orientation (zigzag, armchair or mixed).

This method is unique, simple, highly robust and highly effective in obtaining GNRs and other graphene nanostructures under a high level of control. Highly-oriented-pyrolytic-graphite (HOPG) is sliced by a diamond knife, producing graphite nanoblocks (GNBs) of precisely controlled width and atomic orientation. These GNB are then chemically exfoliated to produce GNRs. In opposition to the existing, this method produces low-defect GNRs at high throughput with highly controlled crystallography.

Fig 1. Transmission electron microscopy image showing high throughput production of GNRs of controlled width (50 nm).
Potential advantages of this IP over current technologies include:
  • High throughput GNR production with predictable metallic and semiconducting properties via improved control on band gap.
  • Width controlled at 1 nm resolution.
  • Controlled crystallographic orientations.
  • Production of other controlled nanoshapes.
Development of high performance GNRs is beneficial to various electronic, optoelectronic and semiconducting industries, with interest in the following products and services:
  • Ultrahigh speed transistors
  • Electronic & optoelectronic devices
  • Sensors (biological, physical, etc.)
  • Solar cells
  • Logic devices
  • Actuators
  • Coulomb blockade devices
  • Ultra-strong composite paper
  • Field emission devices
  • Transparent electrodes
  • Conductive pastes
  • Optical/fluorescent devices

This method also presents potential for application of graphene in biological devices.

Patent Status
  • International Patent Protection (#13/511,600) filed in USA on May 23, 2012.

Kansas State University Research Foundation seeks to have discussions with companies that are interested in licensing and/or research collaborations.

Interested parties should contact:

Kansas State University Institute for Commercialization (KSU-IC)
2005 Research Park Circle Manhattan, KS 66502
Tel: 785-532-3900 Fax: 785-532-3909
E-Mail: ic@k-state.edu