Browsing by Author "Saikia, P."
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- ItemAn analytical model of multi-component radio frequency capacitively coupled plasma and experimental validation(2017) Veloso Espinosa, Felipe Eduardo; Wyndham, E.; Favre Domínguez, Mario; Bhuyan, Heman; Saikia, P.
- ItemEffect of hydrogen addition on the deposition of titanium nitride thin films in nitrogen added argon magnetron plasma(2016) Saikia, P.; Bhuyan, Heman; Díaz Droguett, Donovan Enrique; Guzman, F.; Mändl, S.; Saikia, B. K.; Favre Domínguez, Mario; Maze Ríos, Jerónimo; Wyndham, E.
- ItemEffect of RF acetylene plasma on the composition and dynamics of a titanium plasma plume in a plasma enhanced pulsed laser deposition system(2025) Bhuyan, H.; Escalona, M.; Villegas, R.; Mal, E.; Cisternas, M.; Saikia, P.; Bora, B.; Kausik, S. S.; Wyndham, E.; Favre, M.We report the effect of radio frequency (RF) acetylene plasma on the dynamics and composition of titanium (Ti) plasma plume in a plasma-enhanced pulsed laser deposition (PEPLD) system. The titanium target, mounted inside a capacitively coupled RF discharge, was ablated by using a nanosecond Nd:YAG pulsed laser at 1064 nm with a power density of 2.65 GW/cm(2). The experiments were performed at different operating pressures of acetylene. Fast imaging and optical emission spectroscopy were employed to study the physics behind the pulsed laser deposition in both (PLD) and PEPLD systems. A nonlinear dependence of the plasma plume evolution was observed over a range of pressure. Different expansion regimes correspond to the pressure of the experiments. The plume expansion velocity ranges between 6 x 10(3) m/s and 30 x 10(3) m/s. Emission spectra reveal the presence of C II and Ti II lines depending on the experimental conditions. The presence of background RF plasma leads to substantial enhancement of the emission intensity of the C II spectral lines. In addition, with increasing RF power and background pressure, the intensities of the C II spectral lines increase; whereas the intensities of the Ti II spectral lines decrease with the increase in RF power. Plasma temperature was estimated from the Ti II lines using the Boltzmann plot method, whereas the electron density was estimated from the Stark-broadened Ti II line at 454.9 nm. The calculated densities and temperatures lie between 10(17)-10(18 )cm(-3) and 0.8-2.0 eV, respectively. These results show the effects of the different backgrounds (either neutral or RF plasma) on the propagation of the laser-produced plasma (LPP), which we propose to be useful in the thin film deposition process using PLD.
- ItemStudy of dual radio frequency capacitively coupled plasma: an analytical treatment matched to an experiment(2018) Saikia, P.; Bhuyan, Heman; Escalona Álvarez, Miguel Benito; Favre Domínguez, Mario; Wyndham, Edmund; Maze Ríos, Jerónimo; Schulze, J.
- ItemStudy of nitrogen implantation in Ti surface using plasma immersion ion implantation & deposition technique as biocompatible substrate for artificial membranes(2020) Cisternas Fruns, Marcelo Andrés; Bhuyan, Heman; Retamal Ponce, María José; Casanova Morales, N.; Favre Domínguez, Mario; Volkmann, Ulrich; Díaz, Donovan; Moraga Jaramillo, Luis; Mandl, S.; Manova, D.; Chandía Cristi, América Valeska; Alvarez, A.; Guzmán, F.; Saikia, P.
- ItemStudy of titanium nitride film growth by plasma enhanced pulsed laser deposition at different experimental conditions(2021) Escalona Álvarez, Miguel Benito; Bhuyan, Heman; Ibacache, S.; Retamal Ponce, María José; Saikia, P.; Borgohain, C.; Valenzuela Ahumada, Julio César; Veloso Espinosa, Felipe Eduardo; Favre Domínguez, Mario; Wyndham Hodder, Edmund Sydenham
- ItemThe electrical asymmetry effect in a multi frequency geometrically asymmetric capacitively coupled plasma : a study by a nonlinear global model(2018) Saikia, P.; Bhuyan, Heman; Escalona Álvarez, Miguel Benito; Favre Domínguez, Mario; Bora, Bijit; Kakati, M.; Wyndham, Edmund; Rawat, R.; Schulze, J.
- ItemWrinkled titanium nitride nanocomposite for robust bendable electrodes(2019) Gence, Loik; Escalona, M.; Castillo, C.; Quero, F.; Saikia, P.; Wheatley, Robert Alastair; Diaz-Droguett, D.E.; Retamal Ponce, María José; Volkmann, Ulrich; Bhuyan, Heman