Conductive adhesive based on mussel-inspired graphene decoration with silver nanoparticles
Journal article, 2018

Decoration with silver nanoparticles was obtained by coating graphene with a polydopamine layer, able to induce spontaneous metallic nanoparticles formation without any specific chemical interfacial modifier, neither using complex instrumentation. The choice of dopamine was inspired by the composition of adhesive proteins in mussels, related to their robust attach to solid surfaces. The synthesis procedure started from graphite and involved eco-friendly compounds, such as Vitamin C and glucose as reducing agent and water as reaction medium. Silver decorated graphene was inserted as secondary nanofiller in the formulation of a reference conductive adhesive based on epoxy resin and silver flakes. A wide characterization of the intermediate materials obtained along the step procedure for the adhesive preparation was carried out by several techniques. We have found that the presence of nanofiller yields, in addition to an improvement of the thermal conductivity (up to 7.6 W/m· K), a dramatic enhancement of the electrical conductivity of the adhesive. In particular, starting from 3 · 10 2 S/cm of the reference adhesive, we obtained a value of 4 · 10 4 S/cm at a nanofiller concentration of 11.5 wt%. The combined double filler conductivity was evaluated by Zallen’s model. The effect of the temperature on the resistivity of the adhesive has been also studied.

Volume Resistivity

Ag Functionalized Graphene

Conductive Adhesive

Green Synthesis

Author

Marcello Casa

University of Salerno

Maria Sarno

University of Salerno

Rosalba Liguori

University of Salerno

Claudia Cirillo

University of Salerno

Alfredo Rubino

University of Salerno

Emanuele Bezzeccheri

University of Salerno

Johan Liu

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Paolo Ciambelli

University of Salerno

Journal of Nanoscience and Nanotechnology

1533-4880 (ISSN)

Vol. 18 2 1176-1185

Subject Categories

Inorganic Chemistry

Materials Chemistry

Other Chemistry Topics

DOI

10.1166/jnn.2018.15256

More information

Latest update

2/13/2019