Efficient liquid exfoliation of KP15 nanowires aided by Hansen's empirical theory

Zhaoxuan Huang; Zhikang Jiang; Nan Tian; Disheng Yao; Fei Long; Yanhan Yang; Danmin Liu

doi:10.3762/bjnano.13.69

Efficient liquid exfoliation of KP₁₅ nanowires aided by Hansen's empirical theory

Beilstein J Nanotechnol. 2022 Aug 17:13:788-795. doi: 10.3762/bjnano.13.69. eCollection 2022.

Authors

Zhaoxuan Huang¹, Zhikang Jiang¹, Nan Tian¹, Disheng Yao¹, Fei Long¹, Yanhan Yang², Danmin Liu³

Affiliations

¹ School of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin 541004, China.
² School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
³ Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, China.

Abstract

The KP₁₅ nanowires with one-dimensional properties has a defect-free surface, high anisotropy, and carrier mobility which is desirable for the development of novel nanodevices. However, the preparation of nanoscale KP₁₅ is still inefficient. In this work, the Hansen solubility parameters of KP₁₅ were first obtained. Based on the Hansen's empirical theory, the concentration of liquid-exfoliated KP₁₅ nanowires was improved to 0.0458 mg·mL^-1 by a solution containing 50% water and 50% acetone. Approximately 79% of the KP₁₅ nanowires had a thickness value below 50 nm and 60.9% of them had a width value below 100 nm. The thinnest KP₁₅ nanowires reached 5.1 nm and had smooth boundaries. Meanwhile, strong temperature-dependent Raman response in exfoliated KP₁₅ nanowires has been observed, which indicates a strong phonon-phonon coupling in those nanowires. This is helpful for non-invasive temperature measurements of KP₁₅ nanodevices.

Keywords: Hansen's empirical theory; KP15; Raman; liquid exfoliation; nanodevices; nanowires; semiconductors.

Grants and funding

This work was supported by the National Natural Science Foundation of China under the grant (51972006), Guangxi Key Laboratory of Optical and Electronic Materials and Devices (20AA-19), Guilin University of Technology research fund (GUTQDJJ2019031), Guangxi Young and middle-aged teachers' basic ability improvement project (2021KY0251), National Natural Science Foundation of China (U20A20245), Guangxi Distinguished Experts Special Fund (2019B06), Guangxi Research Foundation for Science and Technology Base and Talent Special (AD19245175), National Natural Science Foundation of China (NFSC) (52002318), and National Science Foundation of Shaanxi Province (2020JQ-841).