Step by Step Bisacrificial Templates Growth of Bimetallic Sulfide QDs-Attached MOF Nanosheets for Nonlinear Optical Limiting

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 Cu2SnS3 (CTS) QDs-attached CuBDC nanosheets on the functionalized substrate (CTS @ CuBDC film). The obtained CTS QDs possess a uniform size with approximate to 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 x 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.

Automated summary

The authors successfully prepared a composite film of Cu2SnS3 QDs attached to CuBDC nanosheets using a step-by-step bisacrificial template strategy, showing promising optical properties for nonlinear optical applications.