Related Experiment Video
Updated: May 9, 2026
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Conductive thin films of pristine graphene by solvent interface trapping
Steven J Woltornist1, Andrew J Oyer, Jan-Michael Y Carrillo
1Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States.
ACS Nano
|July 25, 2013
Summary
Researchers developed a novel interfacial trapping technique to create large, transparent films from pristine graphene. This method avoids chemical modification, preserving graphene
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Graphite's insolubility hinders its application.
- Chemical modification (oxidation/reduction) degrades graphene properties.
- Pristine graphene offers superior performance but is difficult to process.
Purpose of the Study:
- To develop a method for assembling pristine graphene into macroscopic films without chemical alteration.
- To overcome the limitations of conventional graphite processing techniques.
Main Methods:
- Interfacial trapping technique using a water/heptane mixture.
- Modest sonication of natural flake graphite.
- Assembly of continuous films at the liquid-liquid interface.
- Transfer of graphene films onto hydrophilic solid substrates.
Main Results:
- Formation of up to 95% transparent, macroscopic pristine graphene films.
- Graphene sheets readily transfer to form homogeneous thin films (1-4 layers thick).
- Films exhibit long-range structure with conductivities around 400 S/cm.
Conclusions:
- The interfacial trapping technique enables the production of high-quality pristine graphene films.
- This method preserves intrinsic graphene properties, unlike chemical modification approaches.
- The resulting films have potential applications in electronics and transparent conductive materials.
