SPR biosensor based on polymer multi-mode optical waveguide and nanoparticle signal enhancement
Journal Article
Gabriela Walter, J., Eilers, A., Alwis, L., Wilhelm Roth, B., & Bremer, K. (2020)
SPR biosensor based on polymer multi-mode optical waveguide and nanoparticle signal enhancement. Sensors, 20(10), https://doi.org/10.3390/s20102889
We present a surface plasmon resonance (SPR) biosensor that is based on a planar-optical multi-mode (MM) polymer waveguide structure applied for the detection of biomolecules ...
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy
Journal Article
Kumar, R., Binetti, L., Nguyen, H. T., Alwis, L. S. M., Agrawal, A., Sun, T., & Grattan, K. T. V. (2019)
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy. Scientific Reports, 9, https://doi.org/10.1038/s41598-019-53621-4
Knowledge of the distribution of the aspect ratios (ARs) in a chemically-synthesized colloidal solution of Gold Nano Rods (GNRs) is an important measure in determining the qua...
Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor
Journal Article
Mądry, M., Alwis, L., Binetti, L., Pajewski, Ł., & Bereś-Pawlik, E. (2019)
Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor. IEEE Sensors Journal, 19(20), 9215-9220. https://doi.org/10.1109/JSEN.2019.2922041
A fiber ring laser sensor setup utilizing FBGs (Fiber Bragg Gratings) for simultaneous measurement of ambient temperature and relative humidity (RH) is presented. Two FBGs are...
Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations
Conference Proceeding
Hook, D., Laing, W., Kerrouche, A., Barreto Gonzalez, D., & Alwis, L. S. (2018)
Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations. In 2018 IEEE Sensors Proceedings. , (1-4). https://doi.org/10.1109/ICSENS.2018.8589835
Scour and slope instability are a major issue in keeping the railway structures safe and operational. Conventional measurement techniques do not allow real-time monitoring of ...
Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications
Journal Article
Binetti, L., Stankiewicz, A., & Alwis, L. S. M. (2018)
Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications. Proceedings, 2(13), 789. https://doi.org/10.3390/proceedings2130789
A hydrogel coated fibre grating-based pH sensor for biomedical applications has been realised, where Graphene Oxide (GO) had been used to enhance the bonding between the coati...
Integrated fiber Bragg grating incorporated textile carbon reinforcement structures
Conference Proceeding
Alwis, L., Bremer, K., Zheng, Y., Weigand, F., Kuhne, M., Helbig, R., & Roth, B. (2017)
Integrated fiber Bragg grating incorporated textile carbon reinforcement structures. In 2017 IEEE Sensorshttps://doi.org/10.1109/ICSENS.2017.8234106
An optical fibre Bragg grating (FBG) based strain sensor network incorporated in a functionalized textile-based carbon structure (FTCS) that can be used for structural health ...
Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers
Journal Article
Bustamante, H., Alwis, L. S. M., Grattan, K. T. V., Sun, T., Vorreiter, L., & González, J. (2017)
Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers. Water e-journal, 2(4), 1-6. https://doi.org/10.21139/wej.2017.038
Humidity plays a key role in microbiologically induced corrosion of concrete gravity sewers. Minor reductions in humidity can reduce corrosion rates. No reliable long lived (>...
Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors
Journal Article
Bremer, K., Weigand, F., Zheng, Y., Alwis, L. S., Helbig, R., & Roth, B. (2017)
Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors. Sensors, 17(2), 345. https://doi.org/10.3390/s17020345
Optical fiber-based sensors " embedded " in functionalized carbon structures (FCSs) and textile net structures (TNSs) based on alkaline-resistant glass are introduced for the ...
A pilot study: Evaluation of sensor system design for optical fibre humidity sensors subjected to aggressive air sewer environment
Conference Proceeding
Alwis, L. S. M., Bustamante, H., Bremer, K., Roth, B., Sun, T., & Grattan, K. T. V. (2017)
A pilot study: Evaluation of sensor system design for optical fibre humidity sensors subjected to aggressive air sewer environment. In 2016 IEEE SENSORS. https://doi.org/10.1109/icsens.2016.7808482
Research has identified that humidity plays a fundamental role on the conversion of hydrogen sulphide into sulphuric acid during corrosion of concrete in gravity sewers and th...