Clay Bragg Stack Optical Sensors


  • G. A. O. is Government of Canada Research Chair in Materials Chemistry. The authors thank NSERC, and the University of Toronto for financial support. SEM imaging was performed at the CFI funded “Centre of Nanostructure Imaging” at the Chemistry Department, University of Toronto. Funding granted by the Alexander von Humboldt foundation (Feodor–Lynen postdoc scholarship for B. V. Lotsch) is gratefully acknowledged. Supporting Information is available online from Wiley InterScience or from the authors.


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Functional 1D photonic crystals are fabricated based on the clay Laponite and mesoporous oxide layers. Color-tunable clay Bragg stacks are sensitive to a wide range of analytes and show potential as intelligent optical devices for chemo-optical sensing applications.