scholarly journals Volatile Organic Compounds Sensing Using Optical Fibre Long Period Grating with Mesoporous Nano-Scale Coating

Sensors ◽  
2017 ◽  
Vol 17 (2) ◽  
pp. 205 ◽  
Author(s):  
Jiri Hromadka ◽  
Sergiy Korposh ◽  
Matthew Partridge ◽  
Stephen James ◽  
Frank Davis ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Optical Fibre ◽  
Long Period Grating ◽  
Long Period ◽  
Nano Scale ◽  
Volatile Organic

scholarly journals Optical fibre long period grating based selective vapour sensing of volatile organic compounds

2010 ◽  
Vol 143 (2) ◽  
pp. 629-634 ◽  
Author(s):  
S.M. Topliss ◽  
S.W. James ◽  
F. Davis ◽  
S.P.J. Higson ◽  
R.P. Tatam
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Optical Fibre ◽  
Long Period Grating ◽  
Long Period ◽  
Volatile Organic

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.

Sign in / Sign up

Export Citation Format

Share Document