Zobrazeno 1 - 10
of 16
pro vyhledávání: '"S. K. Barthwal"'
Publikováno v:
Journal of Applied Polymer Science. 112:700-708
Aging and annealing a polycarbonate (PC) polymer surface treated by direct-current (dc) glow discharge tend to revert it back to its virgin (pristine) state existing before surface modification by glow discharge. This structural recovery during aging
Publikováno v:
Metallurgical and Materials Transactions A. 38:197-202
It has been observed that the wettability/surface energy of polycarbonate (PC) changes with the variation in process parameters, such as discharge power and time of exposure of DC glow discharge. The wettability of the PC surface has been measured by
Publikováno v:
Journal of Adhesion Science and Technology. 17:1321-1329
The effect of evaporation on the contact angle of a sessile drop of water on glass and polycarbonate substrates has been investigated. It has been observed that the contact radius depends on the initial mass of the drop and remains constant throughou
Publikováno v:
Journal of Physics D: Applied Physics. 41:135305
The present investigation describes the changes in the wetting characteristics of a polycarbonate (PC) surface modified by exposure to dc glow discharge at 2.04 W, as observed by contact angle measurement. The contact angle of droplets of test liquid
Publikováno v:
Solid State Communications. 16:723-727
Large and anomalous changes in the thermoelectric power of amorphous ( a −) Ge films have been observed on doping with impurities of Al, Fe and Sb. Depending on the concentration, Al and Sb impurities contribute a negative thermoelectric power belo
Publikováno v:
Solid State Communications. 16:301-305
Stable homogeneous amorphous alloy ∗ films of Ge with different concentrations of Al, Cu and Fe have been prepared by the simultaneous vapor deposition technique. Ge-Metal films are amorphous up to a concentration of ∼ 40 at.% Al, ∼ 20 at.% Cu
Autor:
K. L. Chopra, S. K. Barthwal
Publikováno v:
Physica Status Solidi (a). 36:345-355
Electrical conductivity and thermoelectric power of flash evaporated amorphous films of InSb and GaAs are investigated as a function of temperature of boat (evaporation temperature), substrate temperature, deposition at an angle of incidence of vapou
Publikováno v:
Physica Status Solidi (a). 40:247-255
Amorphous films of Cu0.5Ag0.5 are prepared by vapour-quenching of the alloy onto glass substrates held at 80 K. Resistivity, Hall coefficient, thermoelectric power, their temperature dependence, and annealing kinetics are studied in-situ in the tempe
Publikováno v:
Physica Status Solidi (a). 32:489-496
Structural, electrical, and optical properties are investigated of a-Ge films deposited at normal and oblique incidence in the presence of different gas ambients. The presence of oxygen at pressures ≦ 10−5 Torr during deposition of a-Ge films, bo
Autor:
K. L. Chopra, S. K. Barthwal
Publikováno v:
Physica Status Solidi (a). 36:533-549
The temperature dependence of the thermoelectric power (TEP) and the corresponding resistivity of evaporated amorphous (a-)Ge films is studied in the temperature range 140 to 500 K as a function of such deposition parameters as technique of depositio