Monolithic High Performance Surface Anchored Metal−Organic Framework Bragg Reflector for Optical Sensing
Liu, Jianxi / Redel, E. / Walheim, S. / Wang, Z. / Oberst, V. / Liu, Jinxuan / Heissler, S. / Welle, A. / Moosmann, M. / Scherer, T. / Bruns, M. / Gliemann, H,. / Wöll, C. (2015)
Chemistry of Materials, (2015), 27, 1991-1996
- Date: Februar 2015
We report the fabrication of monolithic dielectric mirrors by stacking layers of metal−organic frame-works (MOFs) and indium tin oxide (ITO). Such Hybrid Photonic Band-Gap (PBG) Materials exhibit high optical quality (reflectivities of 80%) and are color tunable over the whole visible range.
While the ITO deposition is accomplished by using a conventional sputter process, the highly porous MOF layers are deposited using liquid-phase epitaxy (LPE), therefore yielding crystalline, continuous, and monolithic HKUST-1 SURMOF thin films with high optical performance.
We demonstrate the optical sensing capabilities of these monolithic and porous Bragg stacks by investigating the chemo-responsive optical properties (PBG shift and modulation of the intensity of the PBG maximum) upon the exposure to different organic solvents.