Strain Engineering in Highly Wrinkled CVD Graphene/Epoxy Systems
Journal article, 2018

Chemical vapor deposition (CVD) is regarded as a promising fabrication method for the automated, large-scale, production of graphene and other two-dimensional materials. However, its full commercial exploitation is limited by the presence of structural imperfections such as folds, wrinkles, and even cracks that downgrade its physical and mechanical properties. For example, as shown here by means of Raman spectroscopy, the stress transfer from an epoxy matrix to CVD graphene is on average 30% of that of exfoliated monolayer graphene of over 10 μm in dimensions. However, in terms of electrical response, the situation is reversed; the resistance has been found here to decrease by the imposition of mechanical deformation possibly due to the opening up of the structure and the associated increase of electron mobility. This finding paves the way for employing CVD graphene/epoxy composites or coatings as conductive "networks" or bridges in cases for which the conductivity needs to be increased or at least retained when the system is under deformation. The tuning/control of such systems and their operative limitations are discussed here.

CVD graphene

electrical resistance

Raman spectroscopy

epoxy resin

wrinkles

Author

George Anagnostopoulos

Institute of Chemical Engineering and High Temperature Chemical Processes

George Paterakis

Institute of Chemical Engineering and High Temperature Chemical Processes

Ioannis Polyzos

Institute of Chemical Engineering and High Temperature Chemical Processes

Panagiotis Nektarios Pappas

Institute of Chemical Engineering and High Temperature Chemical Processes

Kostantinos Kouroupis-Agalou

Institute for organic syntheses and photoreactivity (ISOF-CNR)

Nicola Mirotta

Institute for organic syntheses and photoreactivity (ISOF-CNR)

A. Scidà

Institute for organic syntheses and photoreactivity (ISOF-CNR)

Vincenzo Palermo

Chalmers, Industrial and Materials Science, Materials and manufacture

Institute for organic syntheses and photoreactivity (ISOF-CNR)

John Parthenios

Institute of Chemical Engineering and High Temperature Chemical Processes

Konstantinos Papagelis

Institute of Chemical Engineering and High Temperature Chemical Processes

Aristotle University of Thessaloniki

C. Galiotis

Institute of Chemical Engineering and High Temperature Chemical Processes

Universityof Patras

ACS Applied Materials & Interfaces

1944-8244 (ISSN) 1944-8252 (eISSN)

Vol. 10 49 43192-43202

Subject Categories

Textile, Rubber and Polymeric Materials

Other Materials Engineering

Composite Science and Engineering

DOI

10.1021/acsami.8b14698

More information

Latest update

6/10/2020