Robust Amphiphobic Few-Layer Black Phosphorus Nanosheet with Improved Stability
Robust Amphiphobic Few-Layer Black Phosphorus Nanosheet with Improved Stability
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具有更高稳定性的鲁棒两疏性少层黑磷纳米片
DOI：
10.1002/advs.201901991
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发表时间：
2019-09-30
期刊：
影响因子：
15.1
通讯作者：
Zhao, Yanli
中科院分区：
文献类型：
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作者：
Liu, Xiao;Bai, Yunfei;Zhao, Yanli
少层黑磷（FL-BP）由于其优异的性能和在电子学、光电子学等领域的巨大应用潜力而受到人们的广泛关注。然而，FL-BP固有的不稳定性极大地限制了它的实际应用。本研究通过在FL-BP表面引入1H，1H，2 H，2 H-全氟辛基三氯硅烷（PF 4S），得到了具有两亲性的FL-BP。所获得的PF 40涂覆的FL-BP（FL-BP/PF 40）表现出增强的稳定性，这在高水分含量环境（95%湿度）中2个月的显著降解期间未观察到。特别地，由于表面的两亲性，FL-BP/PF 40在油酸（作为污染物）存在下表现出强的表面拒水性，而其它钝化涂层（例如亲水或疏水涂层）在这样的条件下变为亲水性。由于这一优点，即使表面被油液或其它有机溶剂（如油酸、CH 2Cl 2和N-甲基-2-吡咯烷酮）污染，所获得的FL-BP/PF 40在高水分含量环境中也表现出增强的稳定性2个月。通过双疏涂层对FL-BP进行钝化，为FL-BP的稳定化提供了一种有效的途径。
Few-layer black phosphorus (FL-BP) has been intensively studied due to its attractive properties and great potential in electronic and optoelectronic applications. However, the intrinsic instability of FL-BP greatly limits its practical application. In this study, the amphiphobic FL-BP is achieved by functionalization of 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFDTS) on the surface of FL-BP. The obtained PFDTS coated FL-BP (FL-BP/PFDTS) demonstrates enhanced stability, which is not observed during significant degradation for 2 months in high moisture content environment (95% humidity). Particularly, attributing to the surface amphiphobicity, FL-BP/PFDTS exhibits strong surface water repellency in the presence of oleic acid (as the contaminant), while other passivation coating layers (such as hydrophilic or hydrophobic coating) become hydrophilicity under such conditions. Owing to this advantage, the obtained FL-BP/PFDTS demonstrates enhanced stability in high moisture content environment for 2 months, even though the surface is contaminated by oil liquid or other organic solvents (such as oleic acid, CH2Cl2, and N-methyl-2-pyrrolidone). The passivation of FL-BP by amphiphobic coating provides an effective approach for FL-BP stabilization toward future applications.