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Updated: Aug 22, 2025
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Thermal-needle-triggered cascade reduction of graphene oxide for controllable moving trajectory into conductive
Xiaofang Zhang1,2, Lu Zong3, Mingjie Li1,2
1Group of Biomimetic Smart Materials, CAS Key Lab of Bio-based materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao 266101, P. R. China. limj@qibebt.ac.cn.
Abstract:
We showed graphene patterning could be triggered with a thermal needle and controlled through pre-infiltrating certain materials into graphene oxide (GO) substrates. With an appropriate O/C molar ratio of GO (≥0.4) and physical density (≥3 mg cm-3), a cascade reduction reaction of GO films/aerogels was triggered by a needle with a temperature as low as 195 °C and propagated at a high rate of up to ∼320 mm s-1. The thermal reduction mechanism could also provide a clue for laser writing on GO substrates without the occurrence of cascade reduction for high precision. More importantly, this study offers a promising approach for graphene patterning by triggering with a hot needle and controlling with pre-infiltration of hydrophilic materials.
