Step by Step Bisacrificial Templates Growth of Bimetallic Sulfide QDs‐Attached MOF Nanosheets for Nonlinear Optical Limiting
Yin‐Di Zhu, Yao Kang, Zhi‐Gang Gu, Jian Zhang
Abstract
Abstract Here, the authors first report a bimetallic sulfide quantum dots (QDs)‐attached metal–organic framework (MOF) nanosheets‐based film from bisacrificial templates. By using a step by step bisacrificial templates strategy, MOF CuBDC precursors (BDC = 1,4‐benzenedicarboxylate) and chalcogenidometalates as the templates can successfully in‐situ assemble Cu 2 SnS 3 (CTS) QDs‐attached CuBDC nanosheets on the functionalized substrate (CTS @ CuBDC film). The obtained CTS QDs possess a uniform size with ≈6.2 nm and are homogeneously dispersed on MOF nanosheets, which results in an improvement of conductivity and represents a semiconductive composite film for optical application. A Z‐scan study under the excitation of a 532 nm laser shows that the CTS @ CuBDC film possesses strong optical limiting (OL) behavior and very low OL thresholds (0.92 J cm −2 ) as well as large third‐order nonlinear susceptibility (1.9 × 10 −6 esu). This work suggests that the step by step bisacrificial templates method is a fascinating and feasible strategy to prepare metal sulfide QDs dispersed MOF hybrid materials, and provides a promising potential candidate for nonlinear optical applications.