Printed Capacitive Sensors Based on Ionic Liquid/Metal‐Organic Framework Composites for Volatile Organic Compounds Detection

2021 ◽  
pp. 2010703
Author(s):  
Eduardo Fernandez ◽  
Paula G. Saiz ◽  
Nikola Peřinka ◽  
Stefan Wuttke ◽  
Roberto Fernández de Luis
Keyword(s):  
Ionic Liquid ◽  
Volatile Organic Compounds ◽  
Liquid Metal ◽  
Organic Compounds ◽  
Metal Organic Framework ◽  
Capacitive Sensors ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Volatile Organic Compound Vapour Measurements Using a Localised Surface Plasmon Resonance Optical Fibre Sensor Decorated with a Metal-Organic Framework

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1420
Author(s):  
Chenyang He ◽  
Liangliang Liu ◽  
Sergiy Korposh ◽  
Ricardo Correia ◽  
Stephen P. Morgan
Keyword(s):  
Surface Plasmon Resonance ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Surface Plasmon ◽  
Optical Fibre ◽  
Plasmon Resonance ◽  
Metal Organic Framework ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework

A tip-based fibreoptic localised surface plasmon resonance (LSPR) sensor is reported for the sensing of volatile organic compounds (VOCs). The sensor is developed by coating the tip of a multi-mode optical fibre with gold nanoparticles (size: 40 nm) via a chemisorption process and further functionalisation with the HKUST-1 metal–organic framework (MOF) via a layer-by-layer process. Sensors coated with different cycles of MOFs (40, 80 and 120) corresponding to different crystallisation processes are reported. There is no measurable response to all tested volatile organic compounds (acetone, ethanol and methanol) in the sensor with 40 coating cycles. However, sensors with 80 and 120 coating cycles show a significant redshift of resonance wavelength (up to ~9 nm) to all tested volatile organic compounds as a result of an increase in the local refractive index induced by VOC capture into the HKUST-1 thin film. Sensors gradually saturate as VOC concentration increases (up to 3.41%, 4.30% and 6.18% in acetone, ethanol and methanol measurement, respectively) and show a fully reversible response when the concentration decreases. The sensor with the thickest film exhibits slightly higher sensitivity than the sensor with a thinner film. The sensitivity of the 120-cycle-coated MOF sensor is 13.7 nm/% (R2 = 0.951) with a limit of detection (LoD) of 0.005% in the measurement of acetone, 15.5 nm/% (R2 = 0.996) with an LoD of 0.003% in the measurement of ethanol and 6.7 nm/% (R2 = 0.998) with an LoD of 0.011% in the measurement of methanol. The response and recovery times were calculated as 9.35 and 3.85 min for acetone; 5.35 and 2.12 min for ethanol; and 2.39 and 1.44 min for methanol. The humidity and temperature crosstalk of 120-cycle-coated MOF was measured as 0.5 ± 0.2 nm and 0.5 ± 0.1 nm in the humidity range of 50–75% relative humidity (RH) and temperature range of 20–25 °C, respectively.

Metal Organic Framework (MOF-5) For Sensing of Volatile Organic Compounds

2012 ◽  
Vol 12 (16) ◽  
pp. 1681-1685 ◽  
Author(s):  
N. Iswarya ◽  
M. Ganesh Kumar ◽  
K.S. Rajan ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Metal Organic Framework ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework

A four-fold interpenetrated metal–organic framework as a fluorescent sensor for volatile organic compounds

2016 ◽  
Vol 45 (38) ◽  
pp. 14888-14892 ◽  
Author(s):  
Xiaoyu Zhao ◽  
Yang Li ◽  
Ze Chang ◽  
Long Chen ◽  
Xian-He Bu
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework

A highly luminescent four-fold interpenetrated 3D metal–organic framework based on an AIE active tetrakis(4-(pyridin-4-yl)phenyl)ethene ligand was facilely synthesized and thoroughly investigated.

Highly Fluorescent Metal–Organic Framework for the Sensing of Volatile Organic Compounds

2016 ◽  
Vol 16 (6) ◽  
pp. 3067-3071 ◽  
Author(s):  
Sam L. Jackson ◽  
Anushri Rananaware ◽  
Colin Rix ◽  
Sheshanath V. Bhosale ◽  
Kay Latham
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Metal Organic Framework ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework
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