A5015505451- Ultrasound and Cavitation Phenomena
- Innovative Microfluidic and Catalytic Techniques Innovation
- Electrohydrodynamics and Fluid Dynamics
- Fluid Dynamics and Heat Transfer
- Microfluidic and Bio-sensing Technologies
- Fluid Dynamics and Mixing
- Electrocatalysts for Energy Conversion
- Advancements in Transdermal Drug Delivery
- Electrochemical Analysis and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Minerals Flotation and Separation Techniques
- Ultrasound and Hyperthermia Applications
- Advanced battery technologies research
- Dermatologic Treatments and Research
- Micro and Nano Robotics
- Heat Transfer and Boiling Studies
- Electrowetting and Microfluidic Technologies
- Particle Dynamics in Fluid Flows
- Modular Robots and Swarm Intelligence
- Plant Surface Properties and Treatments
- Process Optimization and Integration
- Laser-Ablation Synthesis of Nanoparticles
- Surface Modification and Superhydrophobicity
- Business, Education, Mathematics Research
- Fuel Cells and Related Materials
University of Twente
2016-2025
Massachusetts Institute of Technology
2020-2023
University of Delaware
2023
Institute of Nanotechnology
2018
Chan Heart Rhythm Institute
2018
Higher Institute of Technologies and Applied Sciences
2004-2011
Applied Technologies (United States)
2004
Several application fields can benefit from solar-hydrogen technologies <italic>via</italic> specific short-term and long-term pathways.
Microfluidics enable the manipulation of chemical reactions using very small amounts fluid, in channels with dimensions tens to hundreds micrometers; so-called microstructured devices, from which iconic image chips emerges. The immediate attraction microfluidics lies its greenness: use quantities reagents and solvents, hence less waste, a precise control reaction conditions, integration functionality for process intensification, safer often faster protocols, reliable scale-up, possibility...
Energy storage technologies based on microfluidic electrochemical devices show optimal conversion efficiencies, and have potential to reach large-scale applications.
With this manuscript we aim to initiate a discussion specific educational actions around ultrasonics sonochemistry. The importance of these does not just derive from mere pedagogical significance, but they can be an exceptional tool for illustrating various concepts in other disciplines, such as process intensification. Sonochemistry is currently far-reaching discipline extending across different scales applicability, the fundamental physics tiny bubbles and molecules, up plants. This review...
It's the pits: Increased efficiency and controllability of sonochemical reactions was achieved with silicon surfaces on which pits were micromachined to entrap gas, which, upon ultrasonic excitation, emits a stream microbubbles (see picture). The are chemically active at amplitudes well below those necessary for activity in conventional reactors.
Control over the bubble growth rates forming on electrodes of water-splitting cells or chemical reactors is critical with respect to attainment higher energy efficiencies within these devices. This study focuses diffusion-driven dynamics a succession H2 bubbles generated at flat silicon electrode substrate. Controlled nucleation achieved by means single site consisting hydrophobic micropit etched micrometer-sized pillar. In our experimental configuration constant-current electrolysis, we...
Abstract Drug diffusion within the skin with a needle-free micro-jet injection (NFI) device was compared two well-established delivery methods: topical application and solid needle injection. A permanent make-up (PMU) machine, normally used for dermal pigmentation, utilized as method. For NFIs continuous wave (CW) laser diode to create bubble inside microfluidic containing light absorbing solution. Each method delivered different solutions into ex vivo porcine skin. The first solution...
A method for the comparison of scenarios in context Process Intensification is presented, and applied to cases reported literature, as well several examples taken from selected industrial practices. step by calculation different factors, all relevant chemical engineering cleaning processes also given. The most important feature this new simplicity arithmetic operations, its robustness where there limited information provide a good assessment. final calculated value, Factor, provides an...
The handling of solids in microreactors represents a challenging task. In this paper, we present an acoustophoretic microreactor developed to manage particles flow and control the material synthesis process. reactor was designed as layered resonator with actuation frequency 1.21 MHz, which standing acoustic wave is generated both depth width direction microchannel. force exerted by on focuses them channel center. A parametric study effect rate, particle size ultrasound conditions focusing...
Bubbles are known to hinder electrochemical processes in water-splitting electrodes. In this study, we present a novel method promote gas evolution away from the electrode surface. We consider ring microelectrode encircling hydrophobic microcavity which succession of bubbles grows. The microelectrode, tested under alkaline water electrolysis conditions, does not suffer bubble coverage. Consequently, chronopotentiometric fluctuations cell weaker than those associated with conventional...
Achieving the United Nations sustainable development goals requires industry and society to develop tools processes that work at all scales, enabling goods delivery, services, technology large conglomerates remote regions. Process Intensification (PI) is a technological advance promises deliver means reach these goals, but higher education has yet totally embrace program. Here, we present practical examples on how better teach principles of PI in context Bloom's taxonomy summarise current...
Abstract Process intensification (PI) has been established as a cluster of technologies able to produce more with less. While scientists around the globe advocate for new semantics that are increasingly tied notion sustainability, what does literature data say about PI? A Vosviewer bibliometric map PI displays it closely linked subjects design, optimization, gas‐to‐liquid technologies, mass transfer, catalysis, and kinetics. We analyze relationship between these while identifying...
The presence of bubbles in gas-evolving electrolytic processes can heavily alter the mass transport gaseous products and induce severe overpotential penalties at electrode through action bubble coverage (hyperpolarization) electrolyte constriction (Ohmic shielding). However, formation also alleviate by lowering concentration dissolved gas vicinity electrode. In this study, we investigate latter considering growth successive hydrogen driven a constant current alkaline-water electrolysis their...
Needle-free injections using microfluidic jets could be optimized by reducing splashing and controlling injection depth. However, this is impeded an incomplete understanding on how jet characteristics influence impact outcome. We hypothesise that exploring the relation between substrate shear modulus behavior will assist in predicting giving insights outcome skin endpoints.To do so, a setup chips, at varying laser powers stand-off distances, was used to create thermocavitation generated with...
The collapse of a gas or vapour bubble near non-porous boundary is directed at the due to asymmetry induced by nearby boundary. High surface pressure and shear stress from this can damage, clean, surface. A porous boundary, such as filter, would act similarly but with reduced thus effect. Prior research has measured cleaning effect bubbles on filters using ultrasonic cleaning, it not known how dynamics are fundamentally affected porosity We address question experimentally investigating...