A5009451883- Catalytic Processes in Materials Science
- Dust and Plasma Wave Phenomena
- nanoparticles nucleation surface interactions
- Electrohydrodynamics and Fluid Dynamics
- Earthquake Detection and Analysis
- Ionosphere and magnetosphere dynamics
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasma Diagnostics and Applications
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Mercury impact and mitigation studies
- Thermography and Photoacoustic Techniques
- Advanced Photocatalysis Techniques
- Nanomaterials for catalytic reactions
- Quantum Computing Algorithms and Architecture
- Coagulation and Flocculation Studies
- Ion-surface interactions and analysis
- Plasma Applications and Diagnostics
- Quantum Information and Cryptography
- Magnetic confinement fusion research
- TiO2 Photocatalysis and Solar Cells
- Nanomaterials and Printing Technologies
- Laser Material Processing Techniques
- Photoacoustic and Ultrasonic Imaging
- Electronic and Structural Properties of Oxides
Shahid Chamran University of Ahvaz
2008-2024
University of Calgary
2023
Kiel University
2012-2018
Fachhochschule Kiel
2012-2016
University of Minnesota
2016
We quantitatively assessed the influence of reactive gases on formation processes transition metal clusters in a gas aggregation cluster source. A source based 2 in. magnetron is used to study production rate titanium and cobalt clusters. Argon served as working for DC discharge, small amount (oxygen nitrogen) added promote formation. found that depends strongly concentration very amounts (less than 0.1% total gas), no takes place absence species. The discharge power, concentration, pressure...
Using reactive DC sputtering in a gas aggregation cluster source, we show that pulsed discharge gives rise to huge increase deposition rate of nanoparticles by more than one order magnitude compared continuous operation. We suggest this effect is caused an equilibrium between slight target oxidation (during “time-off”) and subsequent Ti oxides (sub-oxides) at “time-on” with high power impulse.
Abstract The transition of bulk plasmas to the walls involves a variety complex phenomena that are considerable interest from both physical and technical perspectives. This study numerically examines evolution presheath in multicomponent dusty plasma containing an electron beam emitted cathode. Our results indicate characteristics polarity profoundly influenced by properties beam. Particularly, we observe at specific current density beam, formation becomes impossible, resulting singularity...
The pulsed dc magnetron technique was used for generating TiOx nanoparticles by sputtering from a titanium target in gas aggregation source. It observed that the deposition rate (DR) of shows peak followed broad tail, even constant operation conditions. As key finding present investigation, we show nanoparticle can be stabilized at nonzero DR power regime. Monitoring oxygen concentration mass spectrometry provides insight into generation different processes. Characterization film morphology...
The size, composition, and crystallinity of plasma produced nanoparticles are crucial factors for their physical chemical properties. Here, we investigate the role process gas particularly hydrogen (H2) flow rate, on germanium (Ge) synthesized from a chlorinated precursor by nonthermal plasma. We demonstrate that composition can significantly change nanoparticle size also adjust surface chemistry altering dominant reaction mechanisms. A red shift Ge-Clx infrared absorptions with increasing...
A radio frequency (RF) hollow discharge configuration is presented, which makes use of a combination RF plasma generation and the cathode effect. The system was especially designed for treatment nanoparticles, polymerization, nanocomposite fabrication. process gas streams through in inner cylindrical electrode system. In here presented measurements, pure argon with oxygen admixtures are exemplarily used. characterized by probe measurements effluent, electrical parameters, visual observations...
Abstract Controlled synthesis of core@shell nanoparticles (NPs) for certain applications is a difficult challenge in many nanotechnology projects. In this report, conventional arrangement composed gas aggregation source (GAS) employed to generate the core NPs, which are subsequently coated by shell materials secondary planar magnetron sputtering. The important difference usual system application two opposing magnetrons closed field configuration. prepared Ag NPs GAS coated/treated with Ti...
Treatment of nanoparticles (NPs) in complex environments, such as plasmas, is interest for the fabrication advanced nanomaterials with desired properties and also from a physical point view. Here, authors investigate mutual interaction between silver NPs radio frequency (RF) plasma at different conditions by combining cylindrical hollow electrode gas aggregation source. The investigation NP deposits morphology casted films shows that applied RF discharge significantly changes path well size...
A comprehensive understanding of the physics underlying dust-based processes and ability to control evolution structures are essential in field plasma physics. This knowledge provides foundation for numerous advanced scientific applications including study celestial objects synthesis nanostructures. In this research, we consider linear propagation dust acoustic (DA) ion (DIA) modes a collisional presence an electron beam. The obtained dispersion relation demonstrates that collision parameter...
In spite of the incredible evolutions advanced material characterization methods, this field research faces different technical and scientific challenges. Thermal lens spectroscopy is known as a sensitive nondestructive optical based technique to characterize opto-thermal properties materials also diagnose impurities in solutions. research, by engaging thermal spectroscopy, we investigate diffusivity coefficient ultrathin silver layers, prepared magnetron sputtering. For propose, Shen...
We experimentally demonstrate a commercially viable plug and play Measurement Device Independent Quantum Key Distribution (MDI-QKD) prototype. MDI-QKD allows for sharing of critical components such as single photon detectors by multiple users, making it an ideal choice star-type topology quantum networking.