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@article{f9d4faeeaedb421c857137ca16a38225,
title = "Sensitive and Reversible Detection of Methanol and Water Vapor by In Situ Electrochemically Grown CuBTC MOFs on Interdigitated Electrodes",
abstract = "The in situ electrochemical growth of Cu benzene-1,3,5-tricarboxylate (CuBTC) metal-organic frameworks, as an affinity layer, directly on custom-fabricated Cu interdigitated electrodes (IDEs) is described, acting as a transducer. Crystalline 5-7 μm thick CuBTC layers are grown on IDEs consisting of 100 electrodes with a width and a gap of both 50 μm and a height of 6-8 μm. These capacitive sensors are exposed to methanol and water vapor at 30 °C. The affinities show to be completely reversible with higher affinity toward water compared to methanol. For exposure to 1000 ppm methanol, a fast response is observed with a capacitance change of 5.57 pF at equilibrium. The capacitance increases in time followed diffusion-controlled kinetics (k = 2.9 mmol s-0.5 g-1 CuBTC). The observed capacitance change with methanol concentration follows a Langmuir adsorption isotherm, with a value for the equilibrium affinity Ke = 174.8 bar-1. A volume fraction fMeOH = 0.038 is occupied upon exposure to 1000 ppm of methanol. The thin CuBTC affinity layer on the Cu-IDEs shows fast, reversible, and sensitive responses to methanol and water vapor, enabling quantitative detection in the range of 100-8000 ppm.",
keywords = "Capacitive sensing, Electrochemical synthesis, Interdigitated electrodes, Metal-organic frameworks",
author = "Sumit Sachdeva and Venkatesh, {Manjunath R.} and Mansouri, {Brahim El} and Jia Wei and Andre Bossche and Freek Kapteijn and Zhang, {Guo Qi} and Jorge Gascon and {de Smet}, {Louis C.P.M.} and Ernst Sudh{\"o}lter",
year = "2017",
doi = "10.1002/smll.201604150",
language = "English",
volume = "13",
pages = "160450--1--160450--6",
journal = "Small (online)",
issn = "1613-6829",
publisher = "Wiley-VCH Verlag",
number = "29",

}

RIS

TY - JOUR

T1 - Sensitive and Reversible Detection of Methanol and Water Vapor by In Situ Electrochemically Grown CuBTC MOFs on Interdigitated Electrodes

AU - Sachdeva, Sumit

AU - Venkatesh, Manjunath R.

AU - Mansouri, Brahim El

AU - Wei, Jia

AU - Bossche, Andre

AU - Kapteijn, Freek

AU - Zhang, Guo Qi

AU - Gascon, Jorge

AU - de Smet, Louis C.P.M.

AU - Sudhölter, Ernst

PY - 2017

Y1 - 2017

N2 - The in situ electrochemical growth of Cu benzene-1,3,5-tricarboxylate (CuBTC) metal-organic frameworks, as an affinity layer, directly on custom-fabricated Cu interdigitated electrodes (IDEs) is described, acting as a transducer. Crystalline 5-7 μm thick CuBTC layers are grown on IDEs consisting of 100 electrodes with a width and a gap of both 50 μm and a height of 6-8 μm. These capacitive sensors are exposed to methanol and water vapor at 30 °C. The affinities show to be completely reversible with higher affinity toward water compared to methanol. For exposure to 1000 ppm methanol, a fast response is observed with a capacitance change of 5.57 pF at equilibrium. The capacitance increases in time followed diffusion-controlled kinetics (k = 2.9 mmol s-0.5 g-1 CuBTC). The observed capacitance change with methanol concentration follows a Langmuir adsorption isotherm, with a value for the equilibrium affinity Ke = 174.8 bar-1. A volume fraction fMeOH = 0.038 is occupied upon exposure to 1000 ppm of methanol. The thin CuBTC affinity layer on the Cu-IDEs shows fast, reversible, and sensitive responses to methanol and water vapor, enabling quantitative detection in the range of 100-8000 ppm.

AB - The in situ electrochemical growth of Cu benzene-1,3,5-tricarboxylate (CuBTC) metal-organic frameworks, as an affinity layer, directly on custom-fabricated Cu interdigitated electrodes (IDEs) is described, acting as a transducer. Crystalline 5-7 μm thick CuBTC layers are grown on IDEs consisting of 100 electrodes with a width and a gap of both 50 μm and a height of 6-8 μm. These capacitive sensors are exposed to methanol and water vapor at 30 °C. The affinities show to be completely reversible with higher affinity toward water compared to methanol. For exposure to 1000 ppm methanol, a fast response is observed with a capacitance change of 5.57 pF at equilibrium. The capacitance increases in time followed diffusion-controlled kinetics (k = 2.9 mmol s-0.5 g-1 CuBTC). The observed capacitance change with methanol concentration follows a Langmuir adsorption isotherm, with a value for the equilibrium affinity Ke = 174.8 bar-1. A volume fraction fMeOH = 0.038 is occupied upon exposure to 1000 ppm of methanol. The thin CuBTC affinity layer on the Cu-IDEs shows fast, reversible, and sensitive responses to methanol and water vapor, enabling quantitative detection in the range of 100-8000 ppm.

KW - Capacitive sensing

KW - Electrochemical synthesis

KW - Interdigitated electrodes

KW - Metal-organic frameworks

UR - http://www.scopus.com/inward/record.url?scp=85020274495&partnerID=8YFLogxK

U2 - 10.1002/smll.201604150

DO - 10.1002/smll.201604150

M3 - Article

VL - 13

SP - 160450-1-160450-6

JO - Small (online)

T2 - Small (online)

JF - Small (online)

SN - 1613-6829

IS - 29

M1 - 160450

ER -

ID: 21565460