TY - JOUR

T1 - Structure and microhardness of two-layer foils of nanotwinned copper with graphene nanoinclusions

AU - Kurapova, O. Yu

AU - Konakov, V. G.

AU - Grashchenko, A. S.

AU - Novik, N. N.

AU - Golubev, S. N.

AU - Orlov, A. V.

AU - Ovid'ko, I. A.

N1 - Funding Information: Acknowledgements. This work was supported by the Russian Ministry of Education and Science (Zadanie 9.1964.2014/К). Raman spectroscopy was performed at the Research park of St. Petersburg State University Center for Optical and Laser Research. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017

Y1 - 2017

N2 - Two-layer foils of nanotwinned copper with graphene nanoinclusions were fabricated by electrochemical deposition from 1M CuSO4∗6H2O aqueous solution containing graphene-graphite mixture stabilized by non-ionic surfactants (Pluronic F-127 and Polyacrilic acid - PAC). The microstructure of the outer foils surface was examined by Scanning Electron Microscopy, the microstructure of the inner foils surface was characterized by Atomic Force Microscopy. XRD analysis proved that the deposition of the thin copper layer on the wafer in case of suspension stabilized by Pluronic F-127 surfactant results in the nanotwinned copper growth. Raman Spectroscopy showed that the use of stabilized suspensions provides the graphene insertion into the foils in a form of nanoinclusions i.e. flakes with 4-6 graphene layers. The amount of graphene in the foils depends on the composition of the graphene-graphite suspension and on the surfactant type. Nanoindentation tests were carried out for both inner and outer surfaces of the foils. The microhardness of inner surface of the foils fabricated using the suspension stabilized by Pluronic F-127 surfactant lies in the range of 2 to 3 GPa, while the elastic modulus exceeds 100 GPa.

AB - Two-layer foils of nanotwinned copper with graphene nanoinclusions were fabricated by electrochemical deposition from 1M CuSO4∗6H2O aqueous solution containing graphene-graphite mixture stabilized by non-ionic surfactants (Pluronic F-127 and Polyacrilic acid - PAC). The microstructure of the outer foils surface was examined by Scanning Electron Microscopy, the microstructure of the inner foils surface was characterized by Atomic Force Microscopy. XRD analysis proved that the deposition of the thin copper layer on the wafer in case of suspension stabilized by Pluronic F-127 surfactant results in the nanotwinned copper growth. Raman Spectroscopy showed that the use of stabilized suspensions provides the graphene insertion into the foils in a form of nanoinclusions i.e. flakes with 4-6 graphene layers. The amount of graphene in the foils depends on the composition of the graphene-graphite suspension and on the surfactant type. Nanoindentation tests were carried out for both inner and outer surfaces of the foils. The microhardness of inner surface of the foils fabricated using the suspension stabilized by Pluronic F-127 surfactant lies in the range of 2 to 3 GPa, while the elastic modulus exceeds 100 GPa.

UR - http://www.scopus.com/inward/record.url?scp=85029009969&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85029009969

VL - 32

SP - 58

EP - 73

JO - ФИЗИКА И МЕХАНИКА МАТЕРИАЛОВ

JF - ФИЗИКА И МЕХАНИКА МАТЕРИАЛОВ

SN - 1605-8119

IS - 1

ER -