Electrostatic Functionalization and Passivation of Water-Exfoliated Few-Layer Black Phosphorus by Poly Dimethyldiallyl Ammonium Chloride and Its Ultrafast Laser Application

ACS Applied Materials & Interfaces
Qingliang FengJianlin Zhao

Abstract

Few-layer black phosphorus (BP) which exhibits excellent optical and electronic properties, has great potential applications in nanodevices. However, BP inevitably suffers from the rapid degradation in ambient air because of the high reactivity of P atoms with oxygen and water, which greatly hinders its wide applications. Herein, we demonstrate the electrostatic functionalization as an effective way to simultaneously enhance the stability and dispersity of aqueous phase exfoliated few-layer BP. The poly dimethyldiallyl ammonium chloride (PDDA) is selected to spontaneously and uniformly adsorb on the surface of few-layer BP via electrostatic interaction. The positive charge-center of the N atom of PDDA, which passivates the lone-pair electrons of P, plays a critical role in stabilizing the BP. Meanwhile, the PDDA could serve as hydrophilic ligands to improve the dispersity of exfoliated BP in water. The thinner PDDA-BP nanosheets can stabilize in both air and water even after 15 days of exposure. Finally, the uniform PDDA-BP-polymer film was used as a saturable absorber to realize passive mode-locking operations in a fiber laser, delivering a train of ultrafast pulses with the duration of 1.2 ps at 1557.8 nm. This work provides ...Continue Reading

References

Mar 4, 2014·Nature Nanotechnology·Likai LiYuanbo Zhang
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Mar 19, 2015·ACS Nano·Joohoon KangMark C Hersam
Apr 29, 2015·Nature Nanotechnology·Xiaomu WangFengnian Xia
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Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Joohoon KangMark C Hersam

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Citations

Jan 30, 2020·Advanced Science·Shameel Thurakkal, Xiaoyan Zhang
Dec 30, 2020·Angewandte Chemie·Chuang HanYi-Jun Xu
Jul 30, 2021·Advanced Materials·Ye ZhangHan Zhang
Aug 13, 2021·RSC Advances·Aleksandra MitrovićAndreas Hirsch
Sep 15, 2018·Journal of the American Chemical Society·Xiaozong HuTianyou Zhai
Sep 1, 2020·ACS Applied Materials & Interfaces·Jiangjiang FengQi Jie Wang
Sep 21, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Qiang YuPu Zhou

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