Ambient Protection of Few-Layer Black Phosphorus via Sequestration of Reactive Oxygen Species

作者：Walia Sumeet; Balendhran Sivacarendran; Ahmed Taimur; Singh Mandeep; El Badawi Christopher; Brennan Mathew D; Weerathunge Pabudi; Karim Md Nurul; Rahman Fahmida; Rassell Andrea; Duckworth Jonathan; Ramanathan Rajesh; Collis Gavin E; Lobo Charlene J; Toth Milos; Kotsakidis Jimmy Christopher; Weber Bent; Fuhrer Michael; Dominguez Vera Jose M; Spencer Michelle J S; Aharonovich Igor; Sriram Sharath; Bhaskaran Madhu; Bansal Vipul

来源：Advanced Materials, 2017, 29(27): 1700152.

DOI：10.1002/adma.201700152

• 2D materials
• black phosphorus
• degradation
• ionic liquids
• phosphorene
• stability

Few-layer black phosphorous (BP) has emerged as a promising candidate for next-generation nanophotonic and nanoelectronic devices. However, rapid ambient degradation of mechanically exfoliated BP poses challenges in its practical deployment in scalable devices. To date, the strategies employed to protect BP have relied upon preventing its exposure to atmospheric conditions. Here, an approach that allows this sensitive material to remain stable without requiring its isolation from the ambient environment is reported. The method draws inspiration from the unique ability of biological systems to avoid photo-oxidative damage caused by reactive oxygen species. Since BP undergoes similar photo-oxidative degradation, imidazolium-based ionic liquids are employed as quenchers of these damaging species on the BP surface. This chemical sequestration strategy allows BP to remain stable for over 13 weeks, while retaining its key electronic characteristics. This study opens opportunities to practically implement BP and other environmentally sensitive 2D materials for electronic applications.

• 出版日期2017-7-19