Large-yield exfoliation of few-layer black phosphorus nanosheets in liquid
As a new two-dimensional nanomaterial, few-layer black phosphorus (BP) shows great potential for many applications. However, owing to its high chemical reactivity, the synthesis and processing of BP must be treated with special care to avoid oxidation-induced degradation. Herein, we explore a facile...
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Published in | New journal of chemistry Vol. 43; no. 48; pp. 19365 - 19371 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
09.12.2019
|
Subjects | |
Online Access | Get full text |
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Summary: | As a new two-dimensional nanomaterial, few-layer black phosphorus (BP) shows great potential for many applications. However, owing to its high chemical reactivity, the synthesis and processing of BP must be treated with special care to avoid oxidation-induced degradation. Herein, we explore a facile and efficient liquid exfoliation approach to obtain single- to few-layer black phosphorus nanosheets (BPNSs) with the assistance of Li
2
SiF
6
. Subsequently, BPNSs were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy. Among the conventional solvents, dimethyl sulfoxide (DMSO) was found to provide the BPNSs with a high exfoliation yield (up to 75%). Furthermore, the bacterial toxicity of the BPNSs was evaluated against two model bacterial strains, Gram negative
Escherichia coli
(
E. coli
) and Gram-positive
Staphylococcus aureus
(
S. aureus
). We believe that this method can provide new opportunities for the preparation of high-quality BPNSs in highly concentrated processes.
A novel method for large-scale, few-layer phosphorus nanosheets and their potential antibacterial application. |
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Bibliography: | on agar plates after treatment with varying concentrations of BPNS. See DOI S. aureus Electronic supplementary information (ESI) available: Additional AFM image of BPNSs; BPNSs concentration plot with different surface tensions at 298 K; photographs of bacterial colonies of 10.1039/c9nj04757c and E. coli |
ISSN: | 1144-0546 1369-9261 |
DOI: | 10.1039/c9nj04757c |