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Data for 2020-2025 from SciVal
Selected Publications
2022
4.
Liu, Liangliang; Korposh, Serhiy; Gomez, David; Correia, Ricardo; Hayes-Gill, Barrie R; Morgan, Stephen P
Localised plasmonic hybridisation mode optical fibre sensing of relative humidity Journal Article
In: Sens. Actuators B Chem., vol. 353, no. 131157, pp. 131157, 2022.
Abstract | Tags: Humidity sensor, LSPR, optical fibre sensor, Plasmonic hybridisation
@article{Liu2022-bm,
title = {Localised plasmonic hybridisation mode optical fibre sensing of
relative humidity},
author = {Liangliang Liu and Serhiy Korposh and David Gomez and Ricardo Correia and Barrie R Hayes-Gill and Stephen P Morgan},
year = {2022},
date = {2022-02-01},
journal = {Sens. Actuators B Chem.},
volume = {353},
number = {131157},
pages = {131157},
publisher = {Elsevier BV},
abstract = {This work reports an optical fibre probe functionalised with
'cotton-shaped' gold-silica nanostructures for relative humidity
(RH) monitoring. The sensor response utilises the localised
surface plasmon resonance (LSPR) of self-assembled
nanostructures: gold nanospheres (40 nm) surrounded by one layer
of poly (allylamine hydrochloride) and hydrophilic silica
nanoparticles (10-20 nm) on the end-facet of an optical fibre
via a wavelength shift of the reflected light. Sensor
optimisation is investigated by varying the density of gold
nanoparticles on the end-facet of an optical fibre. It is
demonstrated that the plasmonic hybridisation mode appearing
when the average gold interparticle distance is small (Median:
7.5 nm) is more sensitive to RH after functionalisation than the
singular plasmonic mode. The plasmonic hybridisation mode sensor
demonstrates a high linear regression to RH with a sensitivity
of 0.63 nm/%RH and excellent reversibility. The response time
(T10-90%) and recovery time (T90-10%) are calculated as 1.2
$±$ 0.4 s and 0.95 $±$ 0.18 s. The sensor shows no
measurable cross-talk to temperature in the tested range between
25 °C to 40 °C and the 95% limit of agreement is 3.1%RH when
compared to a commercial reference sensor. Simulation with
finite element analysis reveals a polarisation-dependent
plasmonic hybridisation with a redshift of plasmonic wavelength
as a decrease of the interparticle distance and a higher
refractive index sensitivity, which results in a high
sensitivity to RH as observed in the experiment.},
keywords = {Humidity sensor, LSPR, optical fibre sensor, Plasmonic hybridisation},
pubstate = {published},
tppubtype = {article}
}
This work reports an optical fibre probe functionalised with
'cotton-shaped' gold-silica nanostructures for relative humidity
(RH) monitoring. The sensor response utilises the localised
surface plasmon resonance (LSPR) of self-assembled
nanostructures: gold nanospheres (40 nm) surrounded by one layer
of poly (allylamine hydrochloride) and hydrophilic silica
nanoparticles (10-20 nm) on the end-facet of an optical fibre
via a wavelength shift of the reflected light. Sensor
optimisation is investigated by varying the density of gold
nanoparticles on the end-facet of an optical fibre. It is
demonstrated that the plasmonic hybridisation mode appearing
when the average gold interparticle distance is small (Median:
7.5 nm) is more sensitive to RH after functionalisation than the
singular plasmonic mode. The plasmonic hybridisation mode sensor
demonstrates a high linear regression to RH with a sensitivity
of 0.63 nm/%RH and excellent reversibility. The response time
(T10-90%) and recovery time (T90-10%) are calculated as 1.2
$±$ 0.4 s and 0.95 $±$ 0.18 s. The sensor shows no
measurable cross-talk to temperature in the tested range between
25 °C to 40 °C and the 95% limit of agreement is 3.1%RH when
compared to a commercial reference sensor. Simulation with
finite element analysis reveals a polarisation-dependent
plasmonic hybridisation with a redshift of plasmonic wavelength
as a decrease of the interparticle distance and a higher
refractive index sensitivity, which results in a high
sensitivity to RH as observed in the experiment.
'cotton-shaped' gold-silica nanostructures for relative humidity
(RH) monitoring. The sensor response utilises the localised
surface plasmon resonance (LSPR) of self-assembled
nanostructures: gold nanospheres (40 nm) surrounded by one layer
of poly (allylamine hydrochloride) and hydrophilic silica
nanoparticles (10-20 nm) on the end-facet of an optical fibre
via a wavelength shift of the reflected light. Sensor
optimisation is investigated by varying the density of gold
nanoparticles on the end-facet of an optical fibre. It is
demonstrated that the plasmonic hybridisation mode appearing
when the average gold interparticle distance is small (Median:
7.5 nm) is more sensitive to RH after functionalisation than the
singular plasmonic mode. The plasmonic hybridisation mode sensor
demonstrates a high linear regression to RH with a sensitivity
of 0.63 nm/%RH and excellent reversibility. The response time
(T10-90%) and recovery time (T90-10%) are calculated as 1.2
$±$ 0.4 s and 0.95 $±$ 0.18 s. The sensor shows no
measurable cross-talk to temperature in the tested range between
25 °C to 40 °C and the 95% limit of agreement is 3.1%RH when
compared to a commercial reference sensor. Simulation with
finite element analysis reveals a polarisation-dependent
plasmonic hybridisation with a redshift of plasmonic wavelength
as a decrease of the interparticle distance and a higher
refractive index sensitivity, which results in a high
sensitivity to RH as observed in the experiment.
3.
Bradbury, James A; Zhang, Qimei; Ledezma, Francisco U Hernandez; Correia, Ricardo; Korposh, Serhiy; Hayes-Gill, Barrie R; Tamoué, Ferdinand; Parnham, Alison; McMaster, Simon A; Morgan, Stephen P
Fibre Bragg grating based interface pressure sensor for compression therapy Journal Article
In: Sensors (Basel), vol. 22, no. 5, pp. 1798, 2022.
Abstract | Tags: compression therapy, fibre bragg grating, optical fibre sensor, sub-bandage pressure sensor, venous leg ulcer
@article{Bradbury2022-ih,
title = {Fibre Bragg grating based interface pressure sensor for
compression therapy},
author = {James A Bradbury and Qimei Zhang and Francisco U Hernandez Ledezma and Ricardo Correia and Serhiy Korposh and Barrie R Hayes-Gill and Ferdinand Tamou\'{e} and Alison Parnham and Simon A McMaster and Stephen P Morgan},
year = {2022},
date = {2022-02-01},
journal = {Sensors (Basel)},
volume = {22},
number = {5},
pages = {1798},
publisher = {MDPI AG},
abstract = {Compression therapy is widely used as the gold standard for
management of chronic venous insufficiency and venous leg
ulcers, and the amount of pressure applied during the
compression therapy is crucial in supporting healing. A fibre
optic pressure sensor using Fibre Bragg Gratings (FBGs) is
developed in this paper to measure sub-bandage pressure whilst
removing cross-sensitivity due to strain in the fibre and
temperature. The interface pressure is measured by an FBG
encapsulated in a polymer and housed in a textile to minimise
discomfort for the patient. The repeatability of a manual
fabrication process is investigated by fabricating and
calibrating ten sensors. A customized calibration setup
consisting of a programmable translation stage and a weighing
scale gives sensitivities in the range 0.4-1.5 pm/mmHg (2.6-11.3
pm/kPa). An alternative calibration method using a rigid plastic
cylinder and a blood pressure cuff is also demonstrated.
Investigations are performed with the sensor under a compression
bandage on a phantom leg to test the response of the sensor to
changing pressures in static situations. Measurements are taken
on a human subject to demonstrate changes in interface pressure
under a compression bandage during motion to mimic a clinical
application. These results are compared to the current gold
standard medical sensor using a Bland-Altman analysis, with a
median bias ranging from -4.6 to -20.4 mmHg, upper limit of
agreement (LOA) from -13.5 to 2.7 mmHg and lower LOA from -32.4
to -7.7 mmHg. The sensor has the potential to be used as a
training tool for nurses and can be left in situ to monitor
bandage pressure during compression therapy.},
keywords = {compression therapy, fibre bragg grating, optical fibre sensor, sub-bandage pressure sensor, venous leg ulcer},
pubstate = {published},
tppubtype = {article}
}
Compression therapy is widely used as the gold standard for
management of chronic venous insufficiency and venous leg
ulcers, and the amount of pressure applied during the
compression therapy is crucial in supporting healing. A fibre
optic pressure sensor using Fibre Bragg Gratings (FBGs) is
developed in this paper to measure sub-bandage pressure whilst
removing cross-sensitivity due to strain in the fibre and
temperature. The interface pressure is measured by an FBG
encapsulated in a polymer and housed in a textile to minimise
discomfort for the patient. The repeatability of a manual
fabrication process is investigated by fabricating and
calibrating ten sensors. A customized calibration setup
consisting of a programmable translation stage and a weighing
scale gives sensitivities in the range 0.4-1.5 pm/mmHg (2.6-11.3
pm/kPa). An alternative calibration method using a rigid plastic
cylinder and a blood pressure cuff is also demonstrated.
Investigations are performed with the sensor under a compression
bandage on a phantom leg to test the response of the sensor to
changing pressures in static situations. Measurements are taken
on a human subject to demonstrate changes in interface pressure
under a compression bandage during motion to mimic a clinical
application. These results are compared to the current gold
standard medical sensor using a Bland-Altman analysis, with a
median bias ranging from -4.6 to -20.4 mmHg, upper limit of
agreement (LOA) from -13.5 to 2.7 mmHg and lower LOA from -32.4
to -7.7 mmHg. The sensor has the potential to be used as a
training tool for nurses and can be left in situ to monitor
bandage pressure during compression therapy.
management of chronic venous insufficiency and venous leg
ulcers, and the amount of pressure applied during the
compression therapy is crucial in supporting healing. A fibre
optic pressure sensor using Fibre Bragg Gratings (FBGs) is
developed in this paper to measure sub-bandage pressure whilst
removing cross-sensitivity due to strain in the fibre and
temperature. The interface pressure is measured by an FBG
encapsulated in a polymer and housed in a textile to minimise
discomfort for the patient. The repeatability of a manual
fabrication process is investigated by fabricating and
calibrating ten sensors. A customized calibration setup
consisting of a programmable translation stage and a weighing
scale gives sensitivities in the range 0.4-1.5 pm/mmHg (2.6-11.3
pm/kPa). An alternative calibration method using a rigid plastic
cylinder and a blood pressure cuff is also demonstrated.
Investigations are performed with the sensor under a compression
bandage on a phantom leg to test the response of the sensor to
changing pressures in static situations. Measurements are taken
on a human subject to demonstrate changes in interface pressure
under a compression bandage during motion to mimic a clinical
application. These results are compared to the current gold
standard medical sensor using a Bland-Altman analysis, with a
median bias ranging from -4.6 to -20.4 mmHg, upper limit of
agreement (LOA) from -13.5 to 2.7 mmHg and lower LOA from -32.4
to -7.7 mmHg. The sensor has the potential to be used as a
training tool for nurses and can be left in situ to monitor
bandage pressure during compression therapy.
2021
2.
He, Chenyang; Liu, Liangliang; Korposh, Sergiy; Correia, Ricardo; Morgan, Stephen P
Volatile organic compound vapour measurements using a localised surface plasmon resonance optical fibre sensor decorated with a metal-organic framework Journal Article
In: Sensors (Basel), vol. 21, no. 4, pp. 1420, 2021.
Abstract | Tags: localised surface plasmon resonance, metal-organic framework, optical fibre sensor, volatile organic compounds
@article{He2021-uj,
title = {Volatile organic compound vapour measurements using a localised
surface plasmon resonance optical fibre sensor decorated with a
metal-organic framework},
author = {Chenyang He and Liangliang Liu and Sergiy Korposh and Ricardo Correia and Stephen P Morgan},
year = {2021},
date = {2021-02-01},
journal = {Sensors (Basel)},
volume = {21},
number = {4},
pages = {1420},
publisher = {MDPI AG},
abstract = {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.},
keywords = {localised surface plasmon resonance, metal-organic framework, optical fibre sensor, volatile organic compounds},
pubstate = {published},
tppubtype = {article}
}
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.
(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.
2020
1.
He, Chenyang; Korposh, Serhiy; Hernandez, Francisco Ulises; Liu, Liangliang; Correia, Ricardo; Hayes-Gill, Barrie R; Morgan, Stephen P
Real-Time Humidity Measurement during Sports Activity using Optical Fibre Sensing Journal Article
In: Sensors (Basel), vol. 20, no. 7, pp. 1904, 2020.
Abstract | Tags: humidity sensing, layer-by-layer, optical fibre sensor, real-time measurement, smart textiles, wearable technology
@article{He2020-wu,
title = {Real-Time Humidity Measurement during Sports Activity using
Optical Fibre Sensing},
author = {Chenyang He and Serhiy Korposh and Francisco Ulises Hernandez and Liangliang Liu and Ricardo Correia and Barrie R Hayes-Gill and Stephen P Morgan},
year = {2020},
date = {2020-03-01},
journal = {Sensors (Basel)},
volume = {20},
number = {7},
pages = {1904},
publisher = {MDPI AG},
abstract = {An optical fibre sensor for monitoring relative humidity (RH)
changes during exercise is demonstrated. The humidity sensor
comprises a tip coating of poly (allylamine hydrochloride)
(PAH)/silica nanoparticles (SiO2 NPs) deposited using the
layer-by-layer technique. An uncoated fibre is employed to
compensate for bending losses that are likely to occur during
movement. A linear fit to the response of the sensing system to RH demonstrates a sensitivity of 3.02 mV/% (R2 = 0.96),
hysteresis $±$ 1.17% RH when 11 bilayers of PAH/SiO2 NPs are
coated on the tip of the fibre. The performance of two different
textiles (100% cotton and 100% polyester) were tested in
real-time relative humidity measurement for 10 healthy
volunteers. The results demonstrate the moisture wicking
properties of polyester in that the relative humidity dropped
more rapidly after cessation of exercise compared to cotton. The
approach has the potential to be used to monitor sports
performance and by clothing developers for characterising
different garment designs.},
keywords = {humidity sensing, layer-by-layer, optical fibre sensor, real-time measurement, smart textiles, wearable technology},
pubstate = {published},
tppubtype = {article}
}
An optical fibre sensor for monitoring relative humidity (RH)
changes during exercise is demonstrated. The humidity sensor
comprises a tip coating of poly (allylamine hydrochloride)
(PAH)/silica nanoparticles (SiO2 NPs) deposited using the
layer-by-layer technique. An uncoated fibre is employed to
compensate for bending losses that are likely to occur during
movement. A linear fit to the response of the sensing system to RH demonstrates a sensitivity of 3.02 mV/% (R2 = 0.96),
hysteresis $±$ 1.17% RH when 11 bilayers of PAH/SiO2 NPs are
coated on the tip of the fibre. The performance of two different
textiles (100% cotton and 100% polyester) were tested in
real-time relative humidity measurement for 10 healthy
volunteers. The results demonstrate the moisture wicking
properties of polyester in that the relative humidity dropped
more rapidly after cessation of exercise compared to cotton. The
approach has the potential to be used to monitor sports
performance and by clothing developers for characterising
different garment designs.
changes during exercise is demonstrated. The humidity sensor
comprises a tip coating of poly (allylamine hydrochloride)
(PAH)/silica nanoparticles (SiO2 NPs) deposited using the
layer-by-layer technique. An uncoated fibre is employed to
compensate for bending losses that are likely to occur during
movement. A linear fit to the response of the sensing system to RH demonstrates a sensitivity of 3.02 mV/% (R2 = 0.96),
hysteresis $±$ 1.17% RH when 11 bilayers of PAH/SiO2 NPs are
coated on the tip of the fibre. The performance of two different
textiles (100% cotton and 100% polyester) were tested in
real-time relative humidity measurement for 10 healthy
volunteers. The results demonstrate the moisture wicking
properties of polyester in that the relative humidity dropped
more rapidly after cessation of exercise compared to cotton. The
approach has the potential to be used to monitor sports
performance and by clothing developers for characterising
different garment designs.
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