A5091159942- Microfluidic and Bio-sensing Technologies
- Photoacoustic and Ultrasonic Imaging
- Fluid Dynamics and Thin Films
- Electrostatics and Colloid Interactions
- Nanomaterials and Printing Technologies
- nanoparticles nucleation surface interactions
- Hydrogels: synthesis, properties, applications
- Electrowetting and Microfluidic Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Perovskite Materials and Applications
- Optical Imaging and Spectroscopy Techniques
- Supramolecular Self-Assembly in Materials
- Lipid Membrane Structure and Behavior
- Electrohydrodynamics and Fluid Dynamics
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Sensor and Energy Harvesting Materials
- Ferroelectric and Piezoelectric Materials
- Chalcogenide Semiconductor Thin Films
- Wind and Air Flow Studies
- Surfactants and Colloidal Systems
- Fluid Dynamics and Vibration Analysis
- Nanopore and Nanochannel Transport Studies
- Pickering emulsions and particle stabilization
- Aerodynamics and Fluid Dynamics Research
- Acoustic Wave Resonator Technologies
Technical University of Darmstadt
2021-2025
Shanghai Jiao Tong University
2016-2019
Sharif University of Technology
2011
In this work, we report on reproducible fabrication of defect-free large-area mixed halide perovskite (CH3NH3PbI3−xClx) thin films by scalable spray coating with the area 25 cm2. This is essential for commercialization solar cell technology. Using an automated coater, film thickness and roughness were optimized controlling solution concentration substrate temperature. For first time, surface tension, contact angle, viscosity dissolved in dimethylformamide (DMF) are reported as a function...
Perovskite solar cells (PSCs) are currently under vigorous research and development, owing to their compelling power conversion efficiencies. PSCs solution-processed and, therefore, fabricated using casting printing methods, such as spin, spray blade coating. The coating characteristics significantly depend on the physical rheological properties of solutions. Thus, due scarcity properties, in this work, we report surface tension, viscosity, density, contact angle selected methylammonium lead...
Glycolipids are known to stabilize biomembrane multilayers through preferential sugar–sugar interactions that act as weak transient membrane cross-links. Here, we use small-angle and quasi-elastic neutron scattering on oligolamellar phospholipid vesicles containing defined glycolipid fractions in order elucidate the influence of glycolipids mechanics dynamics. Small-angle (SANS) reveals (OLVs) obtained by extrusion polydisperse with regard number lamellae, n, which renders interpretation...
In this paper, we report experimental results on the propagation speed, wavelength, and frequency of capillary surface waves induced by imposing ultrasonic vibration substrate a few millimeter thick water film. It is common knowledge that low vertical (∼1–102 Hz) liquid body or layer in bulk oscillation creation standing with comparable to excitation (harmonic subharmonic Faraday waves). Our experiments showed response excited horizontal (20–68 kHz) quite different, hypothetically because...
Ultrasound propagation in liquids is highly influenced by its attenuation due to viscous damping. The dissipated energy will be partially absorbed the liquid dynamic viscosity as well bulk viscosity. former results generation of a flow that called acoustic streaming, and latter associated with vibrational rotational relaxation molecules. Measuring ultrasonic wave presented novel method this article. Poly(N-isopropylacrylamide) (PNIPAM) microgels, which are soluble several solvents such...
Abstract Ultrasonic mixing is a well‐established method to disperse and mix substances. However, the effects of ultrasound on dispersed soft particles as well their adsorption kinetics at interfaces remain unexplored. Ultrasound not only accelerates movement via acoustic streaming, but recent research indicates that it can also manipulate interaction with surrounding liquid. In this study, evaluates microgel water‐oil interface under influence ultrasound. It quantifies how streaming...
As a novel stimulus, we use high-frequency ultrasonic waves to provide the required energy for breaking hydrogen bonds between Poly(N-isopropylacrylamide) (PNIPAM) and water molecules while solution temperature is maintained below volume phase transition (VPTT = 32 °C). Ultrasonic propagate through their will be absorbed due liquid viscosity. The partially leads generation of streaming flow rest spent break bonds. Therefore, microgels collapse become insoluble in agglomerate, resulting...
A key step of inexpensive and scalable perovskite thin-film formation is defect-free fabrication through low-cost facile post-treatment processes. Methods using high annealing temperatures are not favorable for the scale-up solution-processed solar cells, particularly on plastic/flexible substrates. This contribution analyzes effect ultrasonic vibrations, a recently developed process, quality. Ultrasonic vibrations were applied to as-spun CH3NH3PbI3 thin films prepared with various solvents...
Glycolipids are known to stabilize biomembrane multilayers through preferential sugar-sugar interactions that act as weak transient membrane cross-links. Here, we use small-angle and quasi-elastic neutron scattering on oligolamellar phospholipid vesicles containing defined glycolipid fractions in order elucidate the influence of glycolipids mechanics dynamics. Small-angle (SANS) reveals (OLVs) obtained by extrusion polydisperse with regard number lamellae, n, which renders interpretation...
A series of experimental and numerical investigations on two tandem cylinders wake have been studied. The velocity profile turbulence intensity acquired by a single one dimensional Hot Wire anemometer. were mounted in manner the horizontal mid plane working section. effect upstream cylinder diameter, Reynolds number distance between downstream was investigated, while ranged 1.5× ⟦10⟧ ^4 ∼ 3× ^4. diameter (d) 10, 20 25 mm, (D) corresponding to d/D ranging from 0.4 ∼1.0. spacing ratio L/d...
In this study, we investigate dynamic light scattering (DLS) from both randomly diffusing silica particles and acousto-responsive microgels in aqueous dispersions under ultrasonic vibration. Employing high-frequency ultrasound (US) with low amplitude ensures that the polymers remain intact without damage. We derive theoretical expressions for homodyne autocorrelation function, incorporating US term alongside diffusion term. Subsequently, successfully combine a conventional DLS system to...
Abstract In this report, we investigate dynamic light scattering (DLS) from both randomly diffusing silica particles and acousto-responsive microgels in aqueous dispersions under ultrasonic vibration. Employing high-frequency ultrasound (US) with low amplitude ensures that the polymers remain intact without damage. We derive theoretical expressions for homodyne autocorrelation function, incorporating US term alongside diffusion term. Subsequently, successfully combine a conventional DLS...
As a novel stimulus, we used high-frequency ultrasonic waves to provide the required energy for breaking hydrogen bonds between Poly(N-isopropylacrylamide) (PNIPAM) and water molecules while solution temperature maintains below volume phase transition (VPTT=$$32^\circ C$$). Ultrasonic propagate through their will be absorbed due liquid viscosity. The partially leads generation of streaming flow rest spent break bonds. Therefore, microgels collapse become insoluble in agglomerate, resulting...