Metal–organic framework thin films as versatile chemical sensing materials

Abstract

Metal-organic frameworks (MOFs) have been widely investigated as chemical sensing materials due to their periodic porosity, tunable chemical functionalities such as Lewis acid/base sites, potential conductivity and/or sensitive optical properties....

Formation of Polyaniline (PANI) multilayer film using humic acid as the bridging agent: Screening on the fabrication technique

“…There was also less detachment of PANI from the films produced by this technique; as such, the direct growth of PANI on the film is a better alternative as it offers higher uniformity of attachment for a longer time. Similarly, a recent review by Ellis et al [27] reported that the advantage of the in-situ over ex-situ synthesis technique is the adhesion strength of the coating layer on the substrate.…”

2-Dimensional rare earth metal–organic frameworks based on a hexanuclear secondary building unit as efficient detectors for vapours of nitroaromatics and volatile organic compounds

“…[33][34][35][36][37] However, unlike sensing in liquid media, the preparation of a MOF-based gas sensor is a challenging task because it requires an optically inert platform able to support the MOF crystals and to provide good accessibility of the cages to the incoming gaseous analyte. 38 In this sense, embedment of the MOF crystals into thin films of polymeric matrices has shown to be a practical and useful approach for this goal. 39,40 Focusing on gas sensors exhibiting improved sensitivity and selectivity towards target analytes that are very important for the protection of the society from toxic pollutants and terrorist attacks, polymeric films including RE 3+ -MOFs have been used to detect a number of molecular species including explosives, 15 NO 2 16 and VOCs.…”

Competing phases in the room-temperature M2(2,6-ndc)2(dabco) metal–organic framework thin film synthesis

“…[1][2][3] In particular for sensing applications, the fabrication of MOFs as thin films enhance their pore orientation control, and their integration into electronic devices. [4][5][6] The synthesis procedures of high-quality oriented MOF thin films are already well-established. 7 In order to control MOF growth direction for pore orientation on the film, the substrate surface usually needs to be functionalised.…”

“…1–3 In particular for sensing applications, the fabrication of MOFs as thin films enhance their pore orientation control, and their integration into electronic devices. 4–6…”