Adsorption and desorption characteristics of alcohol vapors on a nanoporous ZIF-8 film investigated using silicon microcantilevers

Abstract

Zinc oxide nanorods were synthesized directly on a silicon microcantilever and converted into a nanoporous ZIF-8 film via a solvothermal reaction. The simultaneous measurements of the resonance frequency and deflection of the cantilever revealed that the adsorption of alcohol vapors induced a structural change in the ZIF-8 framework.

Mechanical Properties in Metal–Organic Frameworks: Emerging Opportunities and Challenges for Device Functionality and Technological Applications

“…The mechanical properties of CuBTC are critical to this application as they dictate the adsorbate‐induced changes in lattice parameters that create the detected microcantilever stress. While microcantilevers have since been fabricated using the ZIF‐8 and MIL‐53(Al) (Al(OH)BDC) structures, exploring the detection responses of MOFs with increased Young's moduli and larger‐scale guest‐induced structural changes would further push the limits of microcantilever sensitivity possibilities.…”

Rapid Fabrication of Metal–Organic Framework Films from Metal Substrates Using Intense Pulsed Light

“…Although all the previous processes are straightforward methods to produce crystalline MOFs particles, it is not easy to prepare a thin film of MOFs on a solid substrate [1,31]. Generally, MOFs films have been prepared by several techniques including solvothermal synthesis procedures with immersion of the selected substrate into the precursor solutions of the particular MOFs material [32][33][34][35], layer by layer deposition (LBL) [36,37], liquid phase epitaxy (LPE) [38], Langmuir Blodgett (LB) method [39] and electrochemical deposition [40]. However, the fabrication of MOFs films is challenging since the organic linkers commonly do not provide convertible linkage groups that can form bonds with functional groups on the surface of the supports [31].…”

Strain-based chemical sensing using metal–organic framework nanoparticles

“…9,[18][19][20][21] Micro-electro-mechanical systems (MEMS) sensors coated with thin lms consisting of different MOFs such as ZIF-8 (ZIF, zeolitic imidazolate framework; ZIF-8 ¼ Zn[2-methylimidazolate] 2 ) and HKUST-1 (HKUST, Hong Kong University of Science and Technology; HKUST-1, Cu 3 [benzentricarboxylate] 2 [H 2 O] 3 ) have been shown to successfully respond to water, alcohols and other VOCs, with sensitivity limits that exceed other mass-sensitive sensors. 22,23 However, several challenges remain, including improving the ease of receptor layer preparation, selectivity, sensitivity and response time. 24,25 Oen, parameters act against one another; e.g., a thicker lm may lead to increased sensitivity but at the cost of response time, owing to the time taken for analytes to diffuse through the MOF.…”