Physics: Recent submissions

Now showing items 21-40 of 171

Strain gradient influences on apparent dependences of hydrogen diffusion coefficients on hydrogen content in the Pd81Pt19H n system

Kandasamy, K; Tong, X.Q; Lewis, F.A (Elsevier B.V., 1992)

Consolidating studies are reported of 'uphill hydrogen diffusion' effects produced by lattice strain gradients during hydrogen permeation through tubular membranes of a Pt81Pt19 alloy at 25 degrees C. Hydrogen permeation ...
Efficient hybrid polymer/TiO2 solar cells using a multilayer structure

Ravirajan, P.; Green, A.; Haque, S.A.; Durrant, J.R.; Bradley, D.D.C.; Nelson, J. (Elsevier B.V., 2004)

This study focuses on systems consisting of high hole-mobility MEHPPV based polymers or a fluorene-bithiophene co-polymer in contact with different nanocrystalline TiO2 films. We use photoluminescence quenching, time of ...
Hybrid polymer/zinc oxide photovoltaic devices with vertically oriented ZnO nanorods and an amphiphilic molecular interface layer

Ravirajan, P.; Peiró, A.M.; Nazeeruddin, M.K.; Graetzel, M.; Bradley, D.D.C.; Durrant, J.R.; Nelson, J. (Elsevier B.V., 2006-04)

We report on the effect of nanoparticle morphology and interfacial modification on the performance of hybrid polymer/zinc oxide photovoltaic devices. We compare structures consisting of poly-3-hexylthiophene (P3HT) polymer ...
Efficient charge collection in hybrid polymer/ TiO2 solar cells using poly(ethylenedioxythiophene)/polystyrene sulphonate as hole collector

Ravirajan, P.; Bradley, D.D.C.; Nelson, J.; Haque, S.A.; Durrant, J.R.; Smit, H.J.P.; Kroon, J.M. (Elsevier B.V., 2005-04)

We report a study of the optimization of power conversion efficiency in hybrid solar cells based on nanostructured titanium dioxide and a poly[2-(2-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV) based conjugated ...
The influences of induced elastic fields on permeation of hydrogen in palladium and palladium alloys

Kandasamy, K; Lewis (Elsevier B.V., 1997)

Recent hydrogen permeation studies in Palladium and Palladium alloys have provided definite evidence for the influence of diffusion induced elastic stress on permeation processes. Such influence will introduce an important ...
Hybrid nanocrystalline TiO2 solar cells with a fluorene-thiophene copolymer as a sensitizer and hole conductor

Ravirajan, P.; Haque, S.A.; Durrant, J.R.; Poplavskyy, S.A.; Bradley, D.D.C.; Nelson, J. (Elsevier B.V., 2004-02)

The charge separation and photovoltaic properties of TiO2/polymer hybrid structures was reported. As such, efficient photoinduced charge transfer was observed from a fluorene-thiophene copolymer to the TiO2 film, while ...
The interaction of titanium films with water vapour over a wide range of pressures and exposures

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1982)

The changes of work function phi and resistance R were studied when titanium films were exposed to water vapour at pressures p from UHV to 1.5 Torr and exposures q from 0-104 Torr s. The work function was reduced by ...
Influences of self-induced stress on permeation flux and space-time variation of concentration during diffusion of hydrogen in a palladium alloy

Kandasamy, K (Elsevier B.V., 1995-06)

The nature of hydrogen diffusion in a tubular membrane of a Pd81Pt19 alloy is discussed. The effect of self-induced stress on (a) the space-time variation of hydrogen concentration and (b) the diffusion flux in the steady ...
The interaction of titanium films with oxygen over a wide range of pressures and exposures

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1980)

The interaction of titanium films with oxygen has been studied by observing their change of resistance R and workfunction phi over the range of gas pressures from UHV to 5 Torr and exposures from 0-106 Torr s. The changes ...
The effects of hydrogen sorption on the resistance and work-function of titanium films at 290K

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1984)

Ti films readily sorbed hydrogen up to an atomic ratio r=2.0 at a saturation pressure of 2*10-3 Torr. The turning points on the curve of resistance R versus r were correlated with the phase boundaries. The maximum on this ...
The predominance of a surface plane of high work function on Ti films

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1981)

The contact potential between clean Ti films and an Au reference surface have been determined by the Kelvin vibrating capacitor method. The majority of Ti films deposited on glass substrates had a high work function, which ...
Proceedings of the international conference on advanced materials for clean energy and health applications (AMCEHA 2019)

Karazhanov, S.; Venkatachalapathy, V.; Senthilnanthanan, M. (University of Jaffna, 2019)

Demand for clean energy is going to be immense in the future and it is of utmost interest for the research community to work on novel ideas and find solutions for the challenges facing the clean energy sector. Growing world ...
Synthesis and properties of bio-waste-based hydroxyapatite via hydrothermal process

Ng, C.K.; Ng, Z.L.; Ramesh, S.; Tan, C.Y.; Ting, C.H.; Chuah, Y.D.; Sutharsini, U. (University of Jaffna, 2020)

In this study, a facile hydrothermal method is applied to produce hydroxyapatite (HA) particles using egg shells as calcium precursors and fruit waste extracts (ba nana peel) as biomolecular templates at 150 °C for a ...
The properties of hydroxyapatite ceramic coatings produced by plasma electrolytic oxidation

Adeleke, S.A.; Ramesh, S.; Bushroa, A.R.; Ching, Y.C.; Sopyan, I.; Maleque, M.A.; Krishnasamy, S.; Chandran, H.; Misran, H.; Sutharsini, U. (University of Jaffna, 2018)

Calcium phosphate coatings produced on the surface of Ti6Al4V by plasma electrolytic oxidation (PEO) using different concentrations of hydroxyapatite (HA) in a 0.12 M Na3PO4 (NAP) electrolyte solution was investigated. ...
Efficiency enhancement in dye-sensitized solar cells using hierarchical TiO2 submicron size spheres as a light scattering layer

Dissanayake, M.A.K.L.; Senthuran, S.; Senadeera, G.K.R. (University of Jaffna, 2020)

The photoanode of a dye-sensitized solar cell (DSSC), usually made with a nanoporous TiO2 semiconductor layer sensitized with N719 dye, plays a crucial role in the overall power conversion efficiency as it influences both ...
Multi-walled carbon nanotube incorporated Nanoporous Titanium Dioxide electrodes for Hybrid Polymer Solar cells

Balashangar, K.; Paranthaman, S.; Thanihaichelvan, M.; Amalraj, P.A.; Velauthapillai, D.; Ravirajan, P. (University of Jaffna, 2018)

This study focuses on incorporating Multi-walled carbon nanotubes (MWNT) in nanoporous titanium dioxides (TiO2) thin film for enhancing the performance of hybrid Poly(3-hexylthiophene)(P3HT)/ TiO2 solar cells. MWNTs ...
Binary counter ion effects and dielectric behavior of iodide ion conducting gel polymer electrolytes for high-efficiency quasi-solid-state solar cells

Bandara, T.M.W.J.; Senavirathna, S.L.N.; Wickramasinghe, H.M.N.; Vignarooban, K.; Silva, L.A.D.; Dissanayake, M.A.K.L.; Albinsson, I.; Mellander, B.E. (University of Jaffna, 2020)

A series of highly efficient quasi-solid-state dye-sensitized solar cells (DSCs) is prepared by harnessing the binary cation effect and positive effects of the selected performance enhancers of gel-polymer electrolytes. ...
Effect of Sintering Holding Time on Tetragonal Phase Stability of Yttria Stabilized Zirconia Ceramics

Vignarajah, J.; Murugathas, T.; Ubenthiran, S. (University of Jaffna, 2019)

In this study, the effect of second step sintering holding time on LTD of 3 mol% yttria tetragonal zirconia polycrystals (3Y-TZP) ceramic was studied. The Zirconia powder was die pressed followed by cold isostatically ...
The Voltammetric Hysteresis Behavior and Potential Scan Rate Dependence of a Dye Sensitized Solar Cells

Bandara, T.M.W.J.; Desilva, L.A.; Vignarooban, K.; Senavirathna, S. L. N.; Kulasiri, L. (University of Jaffna, 2019)

The voltammetric hysteresis visible in current density versus solar cell potential (J-V) curves is a serious concern because it is known that the performance of Dye-sensitized Solar Cells (DSCs) depends on the direction ...
Sintering behaviour and properties of manganese-doped alumina

Dhuban, S.B.; Ramesh, S.; Tan, C.Y.; Wong, Y.H.; Alengaram, U.J.; Ramesh, S.; Teng, W.D.; Tarlochan, F.; Sutharsini, U. (University of Jaffna, 2019)

The effect of manganese (0.1, 0.5 and 1.0 wt%) on the sintering and mechanical properties of alumina was studied. Sintering was carried out by the conventional heating method in a box furnace and in a hybrid mul timode ...

Now showing items 21-40 of 171

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