Electrochemical Synthesis of Cu 3 (HHTP) 2 Metal–Organic Frameworks from Cu Nanoparticles for Chemiresistive Gas Sensing

Journal article

The porosity of electrically conductive metal–organic frameworks (MOFs) make them attractive materials for use as the functional sensing element in a variety of electronic devices. Here, we present a route to reliably synthesize conductive MOFs uniformly and in situ through electrochemical growth of Cu3(HHTP)2 from Cu nanoparticle precursors. The nanoparticles are generated using a magnetron sputtering source and are deposited on glass substrates patterned with interdigitated electrodes. Subsequent solution-based electrochemical growth results in a uniform distribution of the MOF on the substrates as determined through Raman spectroscopy, XPS, SEM, and PXRD techniques. As a proof of concept, the MOF-decorated electrodes are then investigated as chemiresistive sensors for NO2 and NH3 gases. Sensing of NH3 in dry N2 carrier gas is achieved with a sub-ppm limit of detection.

Authors: Lister, AM; Armitage, BI; Wang, Y; Chen, R; Li, W

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Chemical Society
• Journal: ACS Applied Nano Materials
• Volume: 8
• Issue: 30
• Pages: 15114-15121
• Publication date: 2025-07-18
• Acceptance date: 2025-07-06
• DOI: 10.1021/acsanm.5c02304
• EISSN: 2574-0970
• ISSN: 2574-0970
• Language: English
• Keywords: electrochemical synthesis; 2D materials; chemiresistors; metal−organic frameworks; sensors