文章基本信息

标题：Counter-ion Dependent, Longitudinal Unzipping of Multi-Walled Carbon Nanotubes to Highly Conductive and Transparent Graphene Nanoribbons
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作者：Dhanraj B. Shinde ; Mainak Majumder ; Vijayamohanan K. Pillai 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep04363
出版社：Springer Nature
摘要：Here we report for the first time, a simple hydrothermal approach for the bulk production of highly conductive and transparent graphene nanoribbons (GNRs) using several counter ions from K₂SO₄, KNO₃, KOH and H₂SO₄ in aqueous media, where, selective intercalation followed by exfoliation gives highly conducting GNRs with over 80% yield. In these experiments, sulfate and nitrate ions act as a co-intercalant along with potassium ions resulting into exfoliation of multi-walled carbon nanotubes (MWCNTs) in an effective manner. The striking similarity of experimental results in KOH and H₂SO₄ that demonstrates partially damaged MWCNTs, implies that no individual K⁺, SO₄²⁻ ion plays a key role in unwrapping of MWCNTs, rather this process is largely effective in the presence of both cations and anions working in a cooperative manner. The GNRs can be used for preparing conductive 16 kΩsq⁻¹, transparent (82%) and flexible thin films using low cost fabrication method.