Now showing items 1-20 of 22

  • Angular dependent light emission from planar waveguides. 

    Peter, Jaison; Prabhu, Radhakrishna; Radhakrishnan, P.; Vallabhan, C. P. G.; Nampoori, V. P. N.; Kailasnath, M. (American Institute of Physics http://dx.doi.org/10.1063/1.4905011, 2015)
    PETER, J., PRABHU, R., RADHAKRISHNAN, P., VALLABHAN, C. P. G., NAMPOORI, V. P. N. and KAILASNATH, M., 2015. Angular dependent light emission from planar waveguides. Journal of Applied Physics, 117 (1), 015301.
    We have investigated the angular dependence of amplified spontaneous emission (ASE) and laser emission from an asymmetric and free-standing polymer thin films doped with rhodamine 6G, which is transversely pumped by a ...
  • Controlled periodic illumination in semiconductor photocatalysis. 

    Tokode, Oluwatosin; Prabhu, Radhakrishna; Lawton, Linda A.; Robertson, Peter K. J. (Elsevier http://dx.doi.org/10.1016/j.jphotochem.2015.12.002, 2015-12-12)
    TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2015. Controlled periodic illumination in semiconductor photocatalysis. Journal of photochemistry and photobiology A: chemistry [online], 319-320, pages 96-106. Available from: http://dx.doi.org/10.1016/j.jphotochem.2015.12.002
    Controlled periodic illumination is a hypothesis postulated in the early 1990s for enhancing the efficiency of semiconductor photocatalytic reactions. This technique has been proposed to improve photocatalytic efficiency ...
  • Development of dithizone based fibre optic evanescent wave sensor for heavy metal ion detection in aqueous environments. 

    Bhavsar, Kaushalkumar; Prabhu, Radhakrishna; Pollard, Pat (IOP Publishing. http://dx.doi.org/10.1088/1742-6596/450/1/012011, 2013-09)
    BHAVSAR, K., PRABHU, R. and POLLARD, P., 2013. Development of dithizone based fibre optic evanescent wave sensor for heavy metal ion detection in aqueous environments. Journal of Physics: Conference Series, 450, 012011.
    Detection of highly toxic heavy metal ions requires rapid, simple, sensitive and selective detection methods in the environment. Optical fibre based sensing facilitates the remote, continuous and in-situ detection ...
  • The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. 

    Tokode, Oluwatosin; Prabhu, Radhakrishna; Lawton, Linda A.; Robertson, Peter K. J. (Elsevier http://dx.doi.org/10.1016/j.cej.2014.03.002, 2014-03-12)
    TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. Chemical engineering journal [online], 246, pages 337-342. Available from: http://dx.doi.org/10.1016/j.cej.2014.03.002
    The nature of photon interaction and reaction pH can have significant impacts on semiconductor photocatalysis. This paper describes the effect of pH on the photonic efficiency of photocatalytic reactions in the aqueous ...
  • Electrochemical oxidation of acetyl salicylic acid and its voltammetric sensing in real samples at a sensitive edge plane pyrolytic graphite electrode modified with graphene. 

    Kruanetr, Senee; Pollard, Pat; Fernandez, Carlos; Prabhu, Radhakrishna (ESG http://www.electrochemsci.org/papers/vol9/91005699.pdf, 2014-07-16)
    KRUANETR, S., POLLARD, P., FERNANDEZ, C. and PRABHU, R. 2014. Electrochemical oxidation of acetyl salicylic acid and its voltammetric sensing in real samples at a sensitive edge plane pyrolytic graphite electrode modified with graphene. International journal of electrochemical science [online], 9(10), pages 5699-5711. Available from: http://www.electrochemsci.org/papers/vol9/91005699.pdf
    We present in this manuscript for the first time the electrochemical oxidation of acetyl salicylic acid and its voltammetric sensing in real samples at a sensitive edge plane pyrolitic graphite electrode (EPPGE) modified ...
  • Highly textured and transparent RF sputtered Eu2O3 doped ZnO films. 

    Sreedharan, Remadevi Sreeja; Ganesan, Vedachalaiyer; Sudarsanakumar, Chellappan Pillai; Bhavsar, Kaushalkumar; Prabhu, Radhakrishna; Pillai, Vellara Pappukutty Pillai Mahadevan (Co-Action Publishing. http://dx.doi.org/10.3402/nano.v6.26759, 2015-03)
    SREEDHARAN, R. S., GANESAN, V., SUDARSANAKUMAR, C. P., BHAVSAR, K., PRAHBU, R. and PILLAI, V. P. P. M., 2015. Highly textured and transparent RF sputtered Eu2O3 doped ZnO films. Nano Reviews. [online] Volume 6 Article 26759. (Available from: http://dx.doi.org/10.3402/nano.v6.26759) [Accessed 16 March 2015]
    Background: Zinc oxide (ZnO) is a wide, direct band gap II-VI oxide semiconductor. ZnO has large exciton binding energy at room temperature, and it is a good host material for obtaining visible and infrared emission of ...
  • Highly transparent and luminescent nanostructured Eu203 doped ZnO films. 

    Sreedharan, Remadevi Sreeja; Ganasan, Vedachalaiyer; Sudarsanakumar, Chellappan Pillai; Prabhu, Radhakrishna; Pillai, V. P. Mahadevan (IOP Publishing. http://dx.doi.org/10.1088/1757-899X/64/1/012027, 2014-05)
    SREEDHARAN, R. S., GANASAN, V., SUDARSANAKUMAR, C., PRABHU, R. and PILLAI, V. P. M., 2014. Highly transparent and luminescent nanostructured Eu203 doped ZnO films. IOP Conference Series: Materials Science and Engineering, 64, 012027.
    Zinc oxide is a wide, direct band gap II-VI oxide semiconductor. Pure and Eu-doped ZnO films are prepared by RF Magnetron sputtering at different doping concentrations (0.5, 1, 3 and 5 wt %). The films are annealed at 500 ...
  • Influence of Pr doping on the structural, morphological, optical, luminescent and non-linear optical properties of RF-sputtered ZnO films. 

    Sreedharan, Remadevi Sreeja; Vinodkumar, R.; Navas, I.; Prabhu, Radhakrishna; Pillai, V. P. Mahadevan (Springer http://dx.doi.org/10.1007/s11837-015-1632-0, 2015-09-23)
    SREEDHARAN, R.S., VINODKUMAR, R., NAVAS, I., PRABHU, R. and PILLAI, V.P.M. 2015. Influence of Pr doping on the structural, morphological, optical, luminescent and non-linear optical properties of RF-sputtered ZnO films. JOM: the journal of the minerals, metals and materials society [online], 68(1), pages 341-350. Available from: http://dx.doi.org/10.1007/s11837-015-1632-0
    The effects of Pr doping on the structural, morphological, optical and non-linear optical properties have been investigated. X-ray diffraction and Raman analysis reveals the formation of highly c-axis-oriented films with ...
  • Investigation of novel methods to remove the cyanotoxin, Cylindrospermopsin, from drinking water. 

    Chandu, Vijith Cholakkal Parambil (Robert Gordon University School of Pharmacy and Life Sciences, 2013-04)
    The widespread distribution of cyanobacteria and their toxic effects on humans has become a major concern for researchers. Cyanobacteria are a group of oxygenic phototrophic bacteria that exhibit an enormous diversity ...
  • Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures. 

    Johny, Jincy; Prabhu, Radhakrishna; Fung, Wai-Keung; Watson, John (IEEE https://dx.doi.org/10.1109/OCEANSAP.2016.7485662, 2016-04-10)
    JOHNY, J., PRABHU, R., FUNG, W. and WATSON, J. 2016. Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures. In the Proceedings of the MTS/IEEE OCEANS 2016 conference: our future is with oceans, 10-13 April 2016, Shanghai, China. Shanghai: MTS/IEEE [online], paper 151207-036. Available from: https://dx.doi.org/10.1109/OCEANSAP.2016.7485662
    Condition monitoring of offshore structures is an indispensable task in the oil and gas industry. Fibre Bragg Grating (FBG) is the key technology used down-hole in order to sense different physical parameters such as strain, ...
  • Investigation of structural parameter dependence of confinement losses in PCF–FBG sensor for oil and gas sensing applications. 

    Johny, Jincy; Prabhu, Radhakrishna; Fung, Wai-Keung (Springer https://dx.doi.org/10.1007/s11082-016-0528-8, 2016-03-25)
    JOHNY, J., PRABHU, R. and FUNG, W.-K. 2016. Investigation of structural parameter dependence of confinement losses in PCF–FBG sensor for oil and gas sensing applications. Optical and quantum electronics [online], 48(4), article 252. Available from: https://dx.doi.org/10.1007/s11082-016-0528-8
    Photonic crystal fibre (PCF)–fibre bragg grating (FBG) integration opens up new possibilities in multi-parameter fibre-optic sensing, owing to their active control over light characteristics and mode confinements. Their ...
  • Investigations on surface wettability of ZnO nanowires using UV LEDs for biosensing applications. 

    Bhavsar, Kaushalkumar; Prabhu, Radhakrishna; Pollard, Pat (IOP Publishing. http://dx.doi.org/10.1088/1757-899X/64/1/012033, 2014-05)
    BHAVSAR, K., PRABHU, R. and POLLARD, P., 2014. Investigations on surface wettability of ZnO nanowires using UV LEDs for biosensing applications. IOP Conference Series: Materials Science and Engineering, 64, 012033.
    ZnO is a biocompatible material suitable for biosensors and microfluidic devices. Nanowires of ZnO tend to show hydrophobic nature which decelerates the adhesion/adsorption of biomolecules on the surface. This paper ...
  • LED-controlled tuning of ZnO nanowires’ wettability for biosensing applications. 

    Bhavsar, Kaushalkumar; Ross, Duncan; Prabhu, Radhakrishna; Pollard, Pat (Co-Action Publishing. http://dx.doi.org/10.3402/nano.v6.26711, 2015-04)
    BHAVSAR, K., ROSS, D., PRABHU, R. and POLLARD, P., 2014. LED-controlled tuning of ZnO nanowires’ wettability for biosensing applications. Nano Reviews, 6:26711
    Background: Wettability is an important property of solid materials which can be controlled by surface energy. Dynamic control over the surface wettability is of great importance for biosensing applications. Zinc oxide ...
  • Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. 

    Tokode, Oluwatosin; Prabhu, Radhakrishna; Lawton, Linda A.; Robertson, Peter K. J. (Elsevier http://dx.doi.org/10.1016/j.apcatb.2014.03.046, 2014-03-30)
    TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. Applied catalysis B: environmental [online], 156-157, pages 398-403. Available from: http://dx.doi.org/10.1016/j.apcatb.2014.03.046
    Quantum yields of the photocatalytic degradation of methyl orange under controlled periodic illumination (CPI) have been modelled using existing models. A modified Langmuir-Hinshelwood (L-H) rate equation was used to predict ...
  • Monitoring and regulating cyanobacterial metabolites (microcystins and geosmin) in aquatic systems. 

    Pestana, Carlos Joao (Robert Gordon University School of Pharmacy and Life Sciences, 2012-04)
    Cyanobacterial secondary metabolites can cause serious harm to animals and humans (cyanotoxins) and can have a major financial impact on the potable water and aquaculture industries (taste and odour compounds). ...
  • Pharmaceutical electrochemistry: The electrochemical detection of asprin utilising screen printed graphene electrodes as sensors platforms. 

    Kruanetr, Senee; Prabhu, Radhakrishna; Pollard, Pat; Fernandez, Carlos (Springer http://dx.doi.org/10.3103/S1068375515030114, 2015-07-15)
    KRUANETR, S., PRABHU, R., POLLARD, P. and FERNANDEZ, C. 2015. Pharmaceutical electrochemistry: The electrochemical detection of asprin utilising screen printed graphene electrodes as sensors platforms. Surface engineering and applied electrochemistry [online], 51(3), pages 283-289. Available from: http://dx.doi.org/10.3103/S1068375515030114
    A sensitive electrochemical sensor was designed for acetyl salicylic acid detection using graphene modified Screen Printed Electrodes. The electrochemical response of the sensor with graphene was improved compared to Screen ...
  • Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres. 

    Pestana, Carlos J.; Edwards, Christine; Prabhu, Radhakrishna; Robertson, Peter K. J.; Lawton, Linda A. (Elsevier http://dx.doi.org/10.1016/j.jhazmat.2015.07.016, 2015-12-30)
    PESTANA, C. J., EDWARDS, C., PRABHU, R., ROBERTSON, P. K. J. and LAWTON, L. A., 2015. Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres. Journal of Hazardous Materials, Vol. 300, pp. 347-353.
    Microcystins and nodularin are toxic cyanobacterial secondary metabolites produced by cyanobacteria that pose a threat to human health in drinking water. Conventional water treatment methods often fail to remove these ...
  • Photocatalytic destruction of volatile organic compounds from the oil and gas industry. 

    Tokode, Oluwatosin (Robert Gordon University School of Engineering, 2014-04)
    Heterogeneous photocatalysis is an advanced oxidation technology widely applied in environmental remediation processes. It is a relatively safe and affordable technology with a low impact on the environment and has found ...
  • Rare elements electrochemistry: the development of a novel electrochemical sensor for the rapid detection of Europium in environmental samples using gold electrode modified with 2-pyridinol-1-oxide. 

    Cruickshank, Laura; Officer, Simon J.; Pollard, Pat; Prabhu, Radhakrishna; Stutter, Mark; Fernandez, Carlos (Japan Society for Analytical Chemistry http://dx.doi.org/10.2116/analsci.31.623, 2015-07)
    CRUICKSHANK, L., OFFICER, S., POLLARD, P., PRABHU, R., STUTTER, M. and FERNANDEZ, C., 2015. Rare elements electrochemistry: the development of a novel electrochemical sensor for the rapid detection of Europium in environmental samples using gold electrode modified with 2-pyridinol-1-oxide. Analytical Sciences, 31 (7), pp. 623-627.
    This work presents for the first time the electrochemical determination of europium using cyclic voltammetry at gold electrodes modified with 2-pyridinol-1-oxide. A well-defined oxidation peak was observed in cyclic ...
  • Rate-dependent polymer adsorption in porous media. 

    Idahosa, Patrick E.G.; Oluyemi, Gbenga Folorunso; Oyeneyin, Babs; Prabhu, Radhakrishna (Elsevier http://dx.doi.org/10.1016/j.petrol.2016.02.020, 2016-02-23)
    IDAHOSA, P.E.G., OLUYEMI, G.F., OYENEYIN, M.B. and PRABHU, R. 2016. Rate-dependent polymer adsorption in porous media. Journal of petroleum science and engineering [online], 143, pages 65-71. Available from: https://dx.doi.org/10.1016/j.petrol.2016.02.020.
    Laboratory core flood experiments were conducted at different flow rates with partially hydrolysed polyacrylamide (HPAM) oilfield Enhanced Oil Recovery (EOR) polymer and silica sand to investigate the polymer retention in ...