Evaporation-Directed Crack-Patterning of Metal-Organic Framework Colloidal Films and Their Application as Photonic Sensors.
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.
['Dalstein|Olivier|O|', 'Gkaniatsou|Effrosyni|E|', 'Sicard|Clemence|C|', 'Sel|Ozlem|O|', 'Perrot|Hubert|H|', 'Serre|Christian|C|', 'Boissière|Cédric|C|', 'Faustini|Marco|M|0000-0002-6254-5116']
crack-patterning metal-organic frameworks nanoparticles diffraction sensing