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Kumar, R., Binetti, L., Nguyen, T.H. , Alwis, L. S. M., Sun, T. 
ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2020).
Optical fibre thermometry using ratiometric green emission of an upconverting nanoparticle-polydimethylsiloxane composite.
Sensors and Actuators A: Physical, 312,
112083..
doi: 10.1016/j.sna.2020.112083
Kumar, R., Binetti, L., Nguyen, H. T. , Alwis, L. S. M., Agrawal, A., Sun, T. ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2019).
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy.
Scientific Reports, 9,
17469..
doi: 10.1038/s41598-019-53621-4
Dhara, P., Kumar, R., Binetti, L. , Nguyen, H., Alwis, L., Sun, T. ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2019).
Optical fiber-based heavy metal detection using the Localized Surface Plasmon Resonance technique.
IEEE Sensors Journal, 19(19),
pp. 8720-8723.
doi: 10.1109/JSEN.2019.2921701
Dissanayake, K. P. W., Dhara, P., Kumar, R. , Ghosh, S. ORCID: 0000-0002-1992-2289, Nguyen, T.H., Sun, T. ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2019).
Fibre optic chemical sensors for environmental monitoring using sensitive nano-material coatings.
Asian Journal of Physics, 28(7-9),
pp. 567-578.
Dissanayake, K. P. W., Kumar, R., Nguyen, T.H. , Wu, W. ORCID: 0000-0003-1462-6402, Sun, T. ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2018).
Stability of Graphene Oxide encapsulated Gold Nanorods for optical sensing purposes.
Journal of Physics: Conference Series, 1065(3),
.032021.
doi: 10.1088/1742-6596/1065/3/032021
Kumar, R., Nguyen, T.H., Agrawal, A. , Sun, T. ORCID: 0000-0003-3861-8933 & Grattan, K. T. V. ORCID: 0000-0003-2250-3832 (2018).
Estimation of the aspect-ratio distribution in chemically synthesized gold nanorods solution using UV-visible absorption spectroscopy.
Journal of Physics : Conference Series, 1065,
032023.
doi: 10.1088/1742-6596/1065/3/032023
Kumar, R. (2020). Development of novel optical fibre sensors based on upconverting and gold nanoparticles. (Unpublished Doctoral thesis, City, University of London)