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Professor STEVE MORGAN's Outputs (71)

Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8 (2018)
Journal Article
Hromadka, J., Tokay, B., Correia, R., Morgan, S. P., & Korposh, S. (2018). Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8. Sensors and Actuators B: Chemical, 260, https://doi.org/10.1016/j.snb.2018.01.015

An optical fibre long period grating (LPG) based volatile organic compound (VOC) sensor coated with ZIF-8, a material from the zeolite imidazolate framework (ZIF) family, functional coating is presented. ZIF-8 film was deposited onto the surface of t... Read More about Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8.

Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1 (2017)
Journal Article
Hromadka, J., Tokay, B., Correia, R., Morgan, S. P., & Korposh, S. (2018). Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1. Sensors and Actuators B: Chemical, 255(3), https://doi.org/10.1016/j.snb.2017.09.041

An optical fibre long period grating (LPG) based carbon dioxide (CO2) sensor coated with HKUST-1, a material from the metal organic framework family, functional coating is presented. In-situ crystallization and layer by layer (LbL) techniques of HKUS... Read More about Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1.

Polymeric optical fibre sensor coated by SiO2 nanoparticles for humidity sensing in the skin microenvironment (2017)
Journal Article
Gomez, D., Morgan, S. P., Hayes-Gill, B. R., Correia, R., & Korposh, S. (2018). Polymeric optical fibre sensor coated by SiO2 nanoparticles for humidity sensing in the skin microenvironment. Sensors and Actuators B: Chemical, 254, 887-895. https://doi.org/10.1016/j.snb.2017.07.191

The sensitivity of a low-cost polymeric optical fibre humidity sensor based on transmittance changes due to evanescent wave absorption is reported using test measurements in an environmental chamber and of the skin. The layer-by-layer method was used... Read More about Polymeric optical fibre sensor coated by SiO2 nanoparticles for humidity sensing in the skin microenvironment.

Nanoscale ultrasound-switchable FRET based liposomes for near-infrared fluorescence imaging in optically turbid media (2017)
Journal Article
Zhang, Q., Morgan, S. P., & Mather, M. L. (2017). Nanoscale ultrasound-switchable FRET based liposomes for near-infrared fluorescence imaging in optically turbid media. Small, 13(33), Article 1602895. https://doi.org/10.1002/smll.201602895

A new approach to fluorescence imaging in optically turbid media centered on the use of nanoscale ultrasound-switchable FRET based liposome contrast agents is reported. Liposomes containing lipophilic carbocyanine dyes as FRET pairs with emission wav... Read More about Nanoscale ultrasound-switchable FRET based liposomes for near-infrared fluorescence imaging in optically turbid media.

Ultrasound modulation of bioluminescence generated inside a turbid medium (2017)
Presentation / Conference Contribution
Ahmad, J., Jayet, B., Hill, P. J., Mather, M. L., Dehghani, H., & Morgan, S. P. (2017, January). Ultrasound modulation of bioluminescence generated inside a turbid medium. Presented at Photons Plus Ultrasound: Imaging and Sensing 2017, San Francisco, California, United States

In vivo bioluminescence imaging (BLI) has poor spatial resolution owing to strong light scattering by tissue, which also affects quantitative accuracy. This paper proposes a hybrid acousto-optic imaging platform that images bioluminescence modulated... Read More about Ultrasound modulation of bioluminescence generated inside a turbid medium.

Ultrasound induced fluorescence of nanoscale liposome contrast agents (2016)
Journal Article
Zhang, Q., Morgan, S. P., O’Shea, P., & Mather, M. L. (2016). Ultrasound induced fluorescence of nanoscale liposome contrast agents. PLoS ONE, 11(7), 1-15. https://doi.org/10.1371/journal.pone.0159742

A new imaging contrast agent is reported that provides an increased fluorescent signal upon application of ultrasound (US). Liposomes containing lipids labelled with pyrene were optically excited and the excimer fluorescence emission intensity was de... Read More about Ultrasound induced fluorescence of nanoscale liposome contrast agents.

Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor (2016)
Presentation / Conference Contribution
Hernandez, F., Correia, R., Morgan, S., Hayes-Gill, B., Evans, D., Sinha, R., Norris, A., Harvey, D., Hardman, J., & Korposh, S. Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor. Presented at Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), Limerick, Ireland

An optical fibre sensor for simultaneous temperature and humidity measurements consisting of one fibre Bragg grating (FBG) to measure temperature and a mesoporous film of bilayers of Poly(allylamine hydrochloride)(PAH) and silica (SiO2) nanoparticles... Read More about Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor.

Polymeric fibre optic sensor based on a SiO2 nanoparticle film for humidity sensing on wounds (2016)
Presentation / Conference Contribution
Gomez, D., Morgan, S. P., Hayes Gill, B. R., & Korposh, S. Polymeric fibre optic sensor based on a SiO2 nanoparticle film for humidity sensing on wounds. Presented at Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), Limerick, Ireland

© 2016 SPIE. Optical fibre sensors have the potential to be incorporated into wound dressings to monitor moisture and predict healing without the need to remove the dressing. A low cost polymeric optical fibre humidity sensor based on evanescent wave... Read More about Polymeric fibre optic sensor based on a SiO2 nanoparticle film for humidity sensing on wounds.

Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff (2016)
Presentation / Conference Contribution
Correia, R., Blackman, O. R., Hernandez, F. U., Korposh, S., Morgan, S. P., Hayes-Gill, B. R., James, S. W., Evans, D., & Norris, A. Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff. Presented at Sixth European Workshop on Optical Fibre Sensors, Limerick, Ireland

A method for measuring the contact pressure between an endotracheal tube cuff and the trachea was designed and developed by using a fibre Bragg grating (FBG) based optical fibre sensor. The FBG sensor is encased in an epoxy based UV-cured cuboid patc... Read More about Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff.

Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system (2016)
Journal Article
Sun, S., Hayes-Gill, B. R., He, D., Zhu, Y., Huynh, N. T., & Morgan, S. P. (2016). Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system. Optics and Lasers in Engineering, 83, https://doi.org/10.1016/j.optlaseng.2016.02.021

Full field laser Doppler imaging (LDI) and single exposure laser speckle contrast imaging (LSCI) are directly compared using a novel instrument which can concurrently image blood flow using both LDI and LSCI signal processing. Incorporating a commerc... Read More about Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system.

Characterization and use of a fiber optic sensor based on PAH/SiO2 film for humidity sensing in ventilator care equipment (2016)
Journal Article
Hernandez, F. U., Morgan, S. P., Hayes-Gill, B. R., Harvey, D., Kinnear, W., Norris, A., Evans, D., Hardman, J., & Korposh, S. (2016). Characterization and use of a fiber optic sensor based on PAH/SiO2 film for humidity sensing in ventilator care equipment. IEEE Transactions on Biomedical Engineering, 63(9), 1985-1992. https://doi.org/10.1109/TBME.2016.2521662

Objective: To develop a compact probe that can be used to monitor humidity in ventilator care equipment. A mesoporous film of alternate layers of Poly(allylamine hydrochloride) (PAH) and silica (SiO2) nanoparticles (bilayers), deposited onto an optic... Read More about Characterization and use of a fiber optic sensor based on PAH/SiO2 film for humidity sensing in ventilator care equipment.

Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array (2015)
Journal Article
Sun, S., Hayes-Gill, B. R., He, D., Zhu, Y., & Morgan, S. P. (2015). Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array. Optics Letters, 40(20), https://doi.org/10.1364/OL.40.004587

A system has been developed in which multi-exposure Laser Speckle Contrast Imaging (LSCI) is implemented using a high frame rate CMOS imaging sensor chip. Processing is performed using a Field Programmable Gate Array (FPGA). The system allows differe... Read More about Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array.

Highly sensitive optical fibre long period grating biosensor anchored with silica core gold shell nanoparticles (2015)
Journal Article
Marques, L. M., Hernandez, F. U., James, S. W., Morgan, S. P., Clark, M., Tatam, R. P., & Korposh, S. (2016). Highly sensitive optical fibre long period grating biosensor anchored with silica core gold shell nanoparticles. Biosensors and Bioelectronics, 75, https://doi.org/10.1016/j.bios.2015.08.046

An optical fibre long period grating (LPG), modified with a coating of silica core gold shell (SiO2:Au) nanoparticles (NPs) deposited using the layer-by-layer method, was employed for the development of a biosensor. The SiO2:Au NPs were electrostatic... Read More about Highly sensitive optical fibre long period grating biosensor anchored with silica core gold shell nanoparticles.

Government policy and healthcare management: proposal of a shared decision-making model (2015)
Journal Article
Petrillo, A., Felice, F. D., Vanzanella, C., Crispino, F., Martin, J. L., Craven, M. P., Morgan, S. P., & Pecchia, L. (2015). Government policy and healthcare management: proposal of a shared decision-making model. International Journal of Management and Decision Making, 14(3), https://doi.org/10.1504/IJMDM.2015.070757

As a consequence of the current economic crisis many changes have been introduced to health systems on national levels to reduce expenditure and to introduce more cost-effective methods. Then recent developments in medical technology have led to a sh... Read More about Government policy and healthcare management: proposal of a shared decision-making model.

A single-chip CMOS pulse oximeter with on-chip lock-in detection (2015)
Journal Article
He, D., Morgan, S. P., Trachanis, D., van Hese, J., Drogoudis, D., Fummi, F., Stefanni, F., Guarnieri, V., & Hayes-Gill, B. R. (2015). A single-chip CMOS pulse oximeter with on-chip lock-in detection. Sensors, 15(7), 17076-17088. https://doi.org/10.3390/s150717076

Pulse oximetry is a noninvasive and continuous method for monitoring the blood oxygen saturation level. This paper presents the design and testing of a single-chip pulse oximeter fabricated in a 0.35 µm CMOS process. The chip includes photodiode, tra... Read More about A single-chip CMOS pulse oximeter with on-chip lock-in detection.

Numerical investigation of the mechanisms of ultrasound-modulated bioluminescence tomography (2015)
Journal Article
Zhang, Q., Mather, M., & Morgan, S. P. (2015). Numerical investigation of the mechanisms of ultrasound-modulated bioluminescence tomography. IEEE Transactions on Biomedical Engineering, 62(9), https://doi.org/10.1109/TBME.2015.2405415

Objective: A hybrid imaging technique, Ultrasound Modulated Luminescence Tomography, that uses ultrasound to modulate diffusely propagating light has been shown to improve the spatial resolution of optical images. This paper is to investigate the und... Read More about Numerical investigation of the mechanisms of ultrasound-modulated bioluminescence tomography.

Post-processing of polymer foam tissue scaffolds with high power ultrasound: A route to increased pore interconnectivity, pore size and fluid transport (2013)
Journal Article
Watson, N. J., Johal, R. K., Glover, Z., Reinwald, Y., White, L. J., Ghaemmaghami, A. M., Morgan, S. P., Rose, F. R., Povey, M. J., & Parker, N. G. (2013). Post-processing of polymer foam tissue scaffolds with high power ultrasound: A route to increased pore interconnectivity, pore size and fluid transport. Materials Science and Engineering: C, 33(8), 4825-4832. https://doi.org/10.1016/j.msec.2013.07.046

The aimof this work is to demonstrate that the structural and fluidic properties of polymer foamtissue scaffolds, post-fabrication but prior to the introduction of cells, can be engineered via exposure to high power ultrasound. Our analysis is suppor... Read More about Post-processing of polymer foam tissue scaffolds with high power ultrasound: A route to increased pore interconnectivity, pore size and fluid transport.

Laser Doppler blood flow imaging using a CMOS imaging sensor with on-chip signal processing (2013)
Journal Article
He, D., Nguyen, H. C., Hayes-Gill, B. R., Zhu, Y., Crowe, J. A., Gill, C., Clough, G. F., & Morgan, S. P. (2013). Laser Doppler blood flow imaging using a CMOS imaging sensor with on-chip signal processing. Sensors, 13(9), https://doi.org/10.3390/s130912632

The first fully integrated 2D CMOS imaging sensor with on-chip signal processing for applications in laser Doppler blood flow (LDBF) imaging has been designed and tested. To obtain a space efficient design over 64 × 64 pixels means that standard proc... Read More about Laser Doppler blood flow imaging using a CMOS imaging sensor with on-chip signal processing.

Pulsed ultrasound modulated optical tomography utilizing the harmonic response of lock-in detection (2013)
Journal Article
Ruan, H., Mather, M., & Morgan, S. P. (2013). Pulsed ultrasound modulated optical tomography utilizing the harmonic response of lock-in detection. Applied Optics, 52(19), https://doi.org/10.1364/AO.52.004755

Ultrasound modulated optical tomography (USMOT) can image the optical properties of a scattering
medium at a spatial resolution approaching that of ultrasound (US). A lock-in parallel speckle detection
technique is proposed to detect pulsed US modu... Read More about Pulsed ultrasound modulated optical tomography utilizing the harmonic response of lock-in detection.