Shear Exfoliated Metal–Organic Framework Nanosheet-Enabled Flexible Sensor for Real-Time Monitoring of Superoxide Anion

• DOI: 10.1021/acsami.9b17659
• Publication Date: 2020-01-15T10:07:50Z
• Authors: Qiming Qiu; Huayun Chen; Zhiheng You; Yuyan Feng; Xiao Wang; Yixian Wang; Yibin Ying
• Keywords: Nanosheet

Recently, two-dimensional metal–organic framework (2D MOF) nanosheets have drawn a lot of attention on account their various advantages, like ultrathin thickness, ultralarge specific surface area, abundant accessible active sites, favorable solution dispersion properties, and ease designability. However, until now, it is still difficult to produce 2D MOF in large scale, which hinders the practical applications nanosheets. Here, for first time, we introduced novel shear exfoliation method prepare scalable by using commercial blender. As proof concept, used two kinds layer-structured MOFs (ELM-12, Cu(bpy)2(OTf)2, bpy = 4,4-bipyridine, OTf trifluoromethanesulfonate Zn2(bim)4, bim benzimidazole) as samples The thickness obtained 3–5 nm. Notably, exfoliated nanosheet (ELM-12) shows improved electrochemical catalytic activity compared with its bulk counterpart. Based this, an ELM-12 nanosheet-based flexible sensor was developed detecting superoxide anions (O2•–) released from cancer cells. fabricated displays excellent sensitivity, selectivity, flexibility, stability, reproducibility.