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Chemically exfoliated highly conductive layer-tunable graphene by simply controlling the exfoliating temperature.

08:00 EDT 14th August 2019 | BioPortfolio

Summary of "Chemically exfoliated highly conductive layer-tunable graphene by simply controlling the exfoliating temperature."

The development of effective strategies for the massive production of layer-number tunable graphene is of great importance to satisfy the requirements in versatile applications such as energy storage, thermal management, photocatalysis. However, how to prepare the layer-tunable graphene by a simple and efficient way is still facing great challenge. Herein, an attempt has been made to exfoliate graphite into layer-tunable graphene by simply soaking the graphite in a binary-component solution composed of H2SO4 and (NH4)2S2O8. In this one-step method, we demonstrate that the layer-number for the as-prepared graphene can be significantly reduced by increasing the exfoliating temperature. An average thickness of ~20, ~10, and ~3 atomic layers can be obtained for the graphene samples exfoliated at the temperature of 30℃, 60℃, and 90℃, respectively. Meanwhile, higher exfoliating temperature not only facilitates the higher efficiency in the exfoliation of graphite, but also achieve a superior conductivity for the prepared graphene. We have demonstrated for the first time that controlling in a sole factor of temperature can effectively tune the layer-number of graphene by a one-step chemical exfoliation method, which will find its great potential in the practical application where the designated property of graphene is required.

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Name: Nanotechnology
ISSN: 1361-6528
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