DOE OSTI · 2575236
Copper-Based Two-Dimensional Conductive Metal–Organic Framework Thin Films for Ultrasensitive Detection of Perfluoroalkyls in Drinking Water
Abstract
Perfluoroalkyls (PFAS) continue to emerge as a global health threat making their effective detection and capture extremely important. Though metal–organic frameworks (MOFs) have stood out as a promising class of porous materials for sensing PFAS, detection limits remain insufficient and a fundamental understanding of detection mechanisms warrants further investigation. Here, in this study, we show the use of a 2D conductive MOF film based on copper hexahydroxy triphenylene (Cu-HHTP) to fabricate chemiresistive sensing devices for detecting PFAS in drinking water. We further show ultrasensitive detection using electrochemical impedance spectroscopy. Owing to excellent electrostatic attractions and electrochemical interactions between the copper-based MOF and PFAS, confirmed by high-resolution spectroscopy and theoretical simulations, the MOF-based sensor reported herein exhibits excellent affinity and sensitivity toward perfluorinated acids at concentrations as low as 0.002 ng/L.
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Roh, Heejung [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)], Quill, Tyler J. [Stanford Univ., CA (United States)] (ORCID:0000000329060747), Chen, Gan [Stanford Univ., CA (United States)], Gong, Huaxin [Stanford Univ., CA (United States)] (ORCID:0000000224930793), Cho, Yeongsu [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)], Kulik, Heather J. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)] (ORCID:0000000193420191), Bao, Zhenan [Stanford Univ., CA (United States)] (ORCID:0000000209721715), Salleo, Alberto [Stanford Univ., CA (United States)], Gumyusenge, Aristide [Stanford Univ., CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)] (ORCID:0000000349955222). 2025-02-08. Copper-Based Two-Dimensional Conductive Metal–Organic Framework Thin Films for Ultrasensitive Detection of Perfluoroalkyls in Drinking Water. https://doi.org/10.1021/acsnano.4c16212
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