Strain Engineering in Highly Wrinkled CVD Graphene/Epoxy Systems
Artikel i vetenskaplig tidskrift, 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.

electrical resistance

CVD graphene

wrinkles

Raman spectroscopy

epoxy resin

Författare

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

Istituto per la Sintesi Organica e la Fotoreattività

Nicola Mirotta

Istituto per la Sintesi Organica e la Fotoreattività

A. Scidà

Istituto per la Sintesi Organica e la Fotoreattività

Vincenzo Palermo

Istituto per la Sintesi Organica e la Fotoreattività

Chalmers, Industri- och materialvetenskap, Material och tillverkning

John Parthenios

Institute of Chemical Engineering and High Temperature Chemical Processes

Konstantinos Papagelis

Aristotelio Panepistimio Thessalonikis

Institute of Chemical Engineering and High Temperature Chemical Processes

C. Galiotis

Panepistimion Patron

Institute of Chemical Engineering and High Temperature Chemical Processes

ACS Applied Materials & Interfaces

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

Vol. 10 49 43192-43202

Ämneskategorier

Textil-, gummi- och polymermaterial

Annan materialteknik

Kompositmaterial och -teknik

DOI

10.1021/acsami.8b14698

Mer information

Senast uppdaterat

2019-01-07