Direct Exfoliation and Dispersion of Two-dimensional Materials in Pure Water Via Temperature Control

Overview

Journal Nat Commun

Specialty Biology

Date 2015 Sep 16

PMID 26369895

Citations 42

Authors

Jinseon Kim

Sanghyuk Kwon

Dae-Hyun Cho

Byunggil Kang

Hyukjoon Kwon

Youngchan Kim

Sung O Park

Gwan Yeong Jung

Eunhye Shin

Wan-Gu Kim

Hyungdong Lee

Gyeong Hee Ryu

Minseok Choi

Tae Hyeong Kim

Junghoon Oh

Sungjin Park

Sang Kyu Kwak

Suk Wang Yoon

Doyoung Byun

Zonghoon Lee

Changgu Lee

Affiliations

Soon will be listed here.

Abstract

The high-volume synthesis of two-dimensional (2D) materials in the form of platelets is desirable for various applications. While water is considered an ideal dispersion medium, due to its abundance and low cost, the hydrophobicity of platelet surfaces has prohibited its widespread use. Here we exfoliate 2D materials directly in pure water without using any chemicals or surfactants. In order to exfoliate and disperse the materials in water, we elevate the temperature of the sonication bath, and introduce energy via the dissipation of sonic waves. Storage stability greater than one month is achieved through the maintenance of high temperatures, and through atomic and molecular level simulations, we further discover that good solubility in water is maintained due to the presence of platelet surface charges as a result of edge functionalization or intrinsic polarity. Finally, we demonstrate inkjet printing on hard and flexible substrates as a potential application of water-dispersed 2D materials.

Citing Articles

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Effect of static pressure on ultrasonic liquid phase exfoliation of few-layer graphene.

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