Physics: Recent submissions

Now showing items 181-200 of 247

Structural and Electronic Properties of Electrodeposited Heterojunction of CuO/Cu2O

Wijesundera, R.P.; Hidaka, M.; Koga, K.; Choi Jae-Young; Sung, N.E. (Ceramics-Silik�ty, 2010)

The structures and the electronic band states of the electrodeposited thin film CuO/Cu2O heterojunction have been studied by means of the X-ray diffractions (XRD) and the X-ray absorption spectra (XAS) with different grazing ...
Fabrication of the CuO/Cu2O heterojunction using an electrodeposition technique for solar cell applications

Wijesundera, R.P. (Semiconductor Science and Technology, 2010)

Thin films of n-type cuprous oxide (Cu2O) were potentiostatically electrodeposited on a Ti substrate in an acetate bath. Cu2O thin films were annealed at 500 �C for 30 min in air for growing p-type cupric oxide (CuO) thin ...
Correlation between glaze-colors and structural properties of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray diffraction (?)

Hidaka, M.; Ohashi, K.; Wijesundera, R.P.; Kumara, L.S.R.; Watanabe, M.; Koga, K.; Choi Jae-Young; Sung, N.E.; Park, Y.J. (Cer?mica, 2011)

HIZEN celadons produced at Arita and Imari areas in Japan from 1630's to 1790's (Edo period) have been investigated by means of X-ray fluorescence analysis, and X-ray diffraction and X-ray absorption spectra using synchrotron ...
Local structures and electronic band states of ??Fe2O3 polycrystalline particles in the glazes of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray absorption spectra (II)

Hidaka, M.; Ohashi, K.; Wijesundera, R.P.; Kumara, L.S.R.; Sugihara, S.; Momoshima, N.; Kubuki, S.; Sung, N.E. (Cer�mica, 2011)

HIZEN celadon glazes produced in 1630's to 1790's (Edo period, Japan) have been investigated by means of X-ray absorption spectra (XAS) near a Fe-K edge by using synchrotron radiation and a M�ssbauer spectrum. The XAS ...
Effects of Indium-Phosphide-Oxide on Photon Absorption of Multijunction Photovoltaic Cells

Abdulla-Al-Galib, M.; Barua, S.; Salam, K.M.A.; Wijesundera, R.P. (2011)

The objective of the anti-reflective coating on the solar cell has been to reduce the photon reflectance and increase the photon absorption. This increase in light trapping ability of the solar cell increases the maximum ...
Biodegradable Plantain Pith for Galvanic Cells

Jayashantha, N.; Jayasuriya, K.D.; Wijesundera, R.P. (2012)

A number of locally available tubers/yams were studied as an electrolytic material for low cost environment friendly Galvanic cell. The cell was fabricated by sandwiching tissues made out of different types of tubers/yams ...
Investigation of the Peltier Cooling Effect Using Low Cost n-Cu2O and p-Cu2S Semiconductors

Kumarasiri, K.M.; Wijesundera, R.P.; Abeywarna, U.K. (2012)

Thermoelectricity is a branch of Physics which describes the conversion of thermal energy into electrical energy (the Seebeck effect) and vice versa (the Peltier effect). Since early days, tellurium-based alloys and ...
Improved efficiency of photovoltaic cell based on indium-phosphide-oxide, indium-phosphide, indium-gallium arsenide and indium-gallium-antimonide

Barua, S.; Abdulla-Al-Galib, M.; Salam, K.M.A.; Awal, M.A.; Wijesundera, R.P. (2012)

Multi-junction photovoltaic cell of III-V alloyed semiconductor material with high optical sensitivity and ideal combination of band-gaps promotes high photon absorption. Using multiband-gap system and splitting the solar ...
Determination of the Temperature Coefficient of the Refractive Index of Liquids for Immersion Lithography

Mendis D R A; Samaranayake W J M (2012)

The refractive indices of solids and liquids are of great importance in many areas of research. In order to find a preferable immersion fluid for integrated circuit(IC) production the refractive index and its variation ...
High voltage engineering applications in Sri Lanka

Samaranayake W J M; Kumara L S R (2005)

This paper provides some important information on the high voltage electric power sector in Sri Lanka. It includes data on the pattern of GDP and electricity demand growth rates from 1970 to 2001, generation statistics, ...
Ozone synthesis in a cylindrical dry air-fed ozonizer by non thermal gas discharges

Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2003)

Ozone is increasingly being used as an alternative oxidant to chlorination processes in various industrial applications without any objectionable by products to the environment and requiring less energy for its production. ...
Ozone production using cylindrical reactors with and without solid dielectric layers in dry air

Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (1999)

An investigation into ozone production in dry air-fed ozonizers under different operating gas discharge conditions at a pressure of 1.01?105 Pa using a spiral wire made to a cylindrical configuration is reported. A magnetic ...
Ozone synthesis in oxygen using a pulsed discharge

Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2001)

Ozone is a strong oxidizing and bleaching agent, which makes it a potent germicide, viricide and bactericide. Therefore, ozone can be used as an alternative to chlorination processes with low energy consumption and without ...
Pulsed streamer discharge characteristics of ozone production in dry air

Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Sakugawa, T.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2000)

Experimental investigation of HV short pulsed streamer discharges in dry air-fed ozonizers under various operating conditions are reported. Ozone concentration, energy input and ozone production yield (efficiency) were ...
Ozone production using pulsed dielectric barrier discharge in oxygen

Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2000)

The production of ozone was investigated using a dielectric barrier discharge in oxygen, and employing short-duration pulsed power. The dependence of the ozone concentration (parts per million, ppm) and ozone production ...
Pulsed power production of ozone using nonthermal gas discharges

Samaranayake, W.J.M.; Miyahar, Y.; Namihira, T.; Katsuki, S.; Sakugawa, T.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)

This paper discusses ozone synthesis by employing a short duration (?120 ns) of pulsed power and using positive voltages in dry air and in oxygen, with and without a dielectric barrier. Ozone concentration and ozone ...
Pulsed power production of ozone in O2/N2 in a coaxial reactor without dielectric layer

Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)

Very short duration pulsed streamer discharges have been used to produce ozone in a gas mixture of nitrogen and oxygen at atmospheric pressure. The ratio of nitrogen to oxygen in the mixture was varied in the range from ...
Ozone generation in dry air using pulsed discharges with and without a solid dielectric layer

Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)

Energy efficient generation of ozone is very important because ozone is being used increasingly in a wide range of industrial applications. Ozonizers usually use dielectric barrier discharges and employ alternating current ...
Synthesis and properties of a new ? polymorph of Li3CrO4

Dissanayake, M.A.K.L.; Garcia-Martin, S.; Saez-Puche, R.; Sumathipala, H.H.; West, A.R. (Journal of Materials Chemistry, 1994)

?-Li3CrO4, isostructural with ?-Li3PO4, has been synthesized by two routes. Reaction of Li2CO3 and Cr2O3 in a 5 : 1 mole ratio in flowing Ar at 800 �C yields ?-Li3CrO4, with a small amount of Li2O. The Li2CO3, seems to ...
Novel Li+ Ion Conductors and Mixed Conductors, Li3+xSixCr1-xO4 and a Simple Method for Estimating Li+/e- Transport Numbers.

Sumathipala, H.H.; Dissanayake, M.A.K.L.; West, A.R. (Chem Inform, 1995)

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please ...

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