Atomic-Scale Investigation of Graphene Grown on Cu Foil and the Effects of Thermal Annealing
Abstract
We have investigated the effects of thermal annealing on ex-situ chemically vapor deposited submonolayer graphene islands on polycrystalline Cu foil at the atomic-scale using ultrahigh vacuum scanning tunneling microscopy. Low-temperature annealed graphene islands on Cu foil (at ~430 deg C) exhibit predominantly striped Moire patterns, indicating a relatively weak interaction between graphene and the underlying polycrystalline Cu foil. Rapid high-temperature annealing of the sample (at 700 800 C) gives rise to the removal of Cu oxide and the recovery of crystallographic features of the copper that surrounds the intact graphene. These experimental observations of continuous crystalline features between the underlying copper (beneath the graphene islands) and the surrounding exposed copper areas revealed by high-temperature annealing demonstrates the impenetrable nature of graphene and its potential application as a protective layer against corrosion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2011
- Accession Number
- ADA559902
Entities
People
- Brandon Fisher
- Esmeralda N. Yitamben
- Helin Cao
- Jeffrey R Guest
- Jifa Tian
- Jongweon Cho
- Li Gao
- Qingkai Yu
- Wei Wu
- Yong P. Chen
Organizations
- Purdue University