1. Evaporation-Directed Crack-Patterning of Metal-Organic Framework Colloidal Films and Their Application as Photonic Sensors.
- Author
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Dalstein, Olivier, Gkaniatsou, Effrosyni, Sicard, Clemence, Sel, Ozlem, Perrot, Hubert, Serre, Christian, Boissière, Cédric, and Faustini, Marco
- Subjects
METAL-organic frameworks ,CRACK propagation (Fracture mechanics) ,METAL nanoparticles ,EVAPORATION (Chemistry) ,COLLOIDS ,PHOTONS - Abstract
A straightforward crack-patterning method is reported allowing the direct formation of periodic cracks in metal-organic framework (MOF) nanoparticle films during dip-coating deposition. The crack propagation and periodicity can be easily tailored by controlling the evaporation front and the withdrawal speed. Several MOF-patterned films can be fabricated on large surfaces and on several substrates (flat, curved or flexible) including the inner surface of a tube, not achievable by other lithographic techniques. We demonstrate that the periodic cracked arrays diffract light and, due to the MOF sorption properties, photonic vapor sensors are fabricated. A new concept of 'in-tube', MOF-based diffraction grating sensors is proposed with outstanding sensitivity that can be easily tuned 'on-demand' as function of the desired detection range. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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