Journal article
Exciton-Driven Chemical Sensors Based on Excitation-Dependent Photoluminescent Two-Dimensional SnS
Azmira Jannat, Farjana Haque, Kai Xu, Chunhua Zhou, Bao Yue Zhang, Nitu Syed, Md Mohiuddin, Kibret A Messalea, Xu Li, Sally L Gras, Xiaoming Wen, Zhengdong Fei, Enamul Haque, Sumeet Walia, Torben Daeneke, Ali Zavabeti, Jian Zhen Ou
ACS Applied Materials and Interfaces | American Chemical Society | Published : 2019
Abstract
Excitation wavelength-dependent photoluminescence (PL) in two-dimensional (2D) transition-metal chalcogenides enables a strong excitonic interaction for high-performance chemical and biological sensing applications. In this work, we explore the possible candidates in the domain of post-transition-metal chalcogenides. Few-layered 2D p-type tin monosulfide (SnS) nanoflakes with submicrometer lateral dimensions are synthesized from the liquid phase exfoliation of bulk crystals. Excitation wavelength-dependent PL is found, and the excitonic radiative lifetime is more than one order enhanced compared to that of the bulk counterpart because of the quantum confinement effect. Paramagnetic NO2 gas i..
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Awarded by Australian Research Council
Awarded by Centre of Excellence in Future Low Energy Electronics
Funding Acknowledgements
We acknowledge the facilities and scientific and technical assistance of the RMIT MicroNano Research Facility (MNRF) and the RMIT Microscopy and Microanalysis Facility (RMMF). The authors would like to acknowledge the support from the Australian Research Council (DE160100715). The authors would also like to recognize the use of the facilities at The Bio21 Molecular Science and Biotechnology Institute at the University of Melbourne. J.Z.O. would like to acknowledge the support from the Centre of Excellence in Future Low Energy Electronics (CE170100039).