Open AccessRobust Amphiphobic Few‐Layer Black Phosphorus Nanosheet with Improved Stability
Author(s) -
Liu Xiao,
Bai Yunfei,
Xu Jun,
Xu Qingchi,
Xiao Liangping,
Sun Liping,
Weng Jian,
Zhao Yanli
Publication year - 2019
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201901991
Subject(s) - passivation , coating , chemical engineering , nanosheet , materials science , oleic acid , black phosphorus , monolayer , humidity , moisture , layer (electronics) , thermal stability , degradation (telecommunications) , surface modification , chemistry , nanotechnology , composite material , optoelectronics , telecommunications , biochemistry , physics , computer science , engineering , thermodynamics
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 1 H ,1 H ,2 H ,2 H ‐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, CH 2 Cl 2 , and N ‐methyl‐2‐pyrrolidone). The passivation of FL‐BP by amphiphobic coating provides an effective approach for FL‐BP stabilization toward future applications.