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Feng Q, Liu H, Zhu M, et al. Electrostatic Functionalization and Passivation of Water-Exfoliated Few-Layer Black Phosphorus by Poly Dimethyldiallyl Ammonium Chloride and Its Ultrafast Laser Application. ACS Appl Mater Interfaces. 2018;10(11):9679-9687doi: 10.1021/acsami.8b00556.
Feng, Q., Liu, H., Zhu, M., Shang, J., Liu, D., Cui, X., Shen, D., Kou, L., Mao, D., Zheng, J., Li, C., Zhang, J., Xu, H., & Zhao, J. (2018). 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, 10(11), 9679-9687. https://doi.org/10.1021/acsami.8b00556
Feng, Qingliang, et al. "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 vol. 10,11 (2018): 9679-9687. doi: https://doi.org/10.1021/acsami.8b00556
Feng Q, Liu H, Zhu M, Shang J, Liu D, Cui X, Shen D, Kou L, Mao D, Zheng J, Li C, Zhang J, Xu H, Zhao J. Electrostatic Functionalization and Passivation of Water-Exfoliated Few-Layer Black Phosphorus by Poly Dimethyldiallyl Ammonium Chloride and Its Ultrafast Laser Application. ACS Appl Mater Interfaces. 2018 Mar 21;10(11):9679-9687. doi: 10.1021/acsami.8b00556. Epub 2018 Mar 12. PMID: 29489321.
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ACS Appl Mater Interfaces. 2018 Mar 21;10(11):9679-9687. doi: 10.1021/acsami.8b00556. Epub 2018 Mar 12.

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 Feng, Hongyan Liu, Meijie Zhu, Jing Shang, Dan Liu, Xiaoqi Cui, Diqin Shen, Liangzhi Kou, Dong Mao, Jianbang Zheng, Chun Li, Jin Zhang, Hua Xu, Jianlin Zhao

Affiliations

  1. Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China.
  2. School of Chemistry, Physics and Mechanical Engineering Faculty , Queensland University of Technology , Garden Point Campus , Brisbane , Queensland 4001 , Australia.
  3. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China.

PMID: 29489321 DOI: 10.1021/acsami.8b00556

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 a new way to obtain highly stable few-layer BP, which shows great promise in ultrafast optics application.

Keywords: PDDA; black phosphorus; electrostatic functionalization; stability; ultrafast lasers

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