A5044250177- Microfluidic and Bio-sensing Technologies
- Ultrasonics and Acoustic Wave Propagation
- Ultrasound Imaging and Elastography
- Engineering Technology and Methodologies
- Engineering Applied Research
- Hydrogels: synthesis, properties, applications
- Acoustic Wave Resonator Technologies
- Soft Robotics and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Laser Material Processing Techniques
- Antenna Design and Analysis
- Anatomy and Medical Technology
- Electrostatics and Colloid Interactions
- Ultrasound and Cavitation Phenomena
- Advanced MEMS and NEMS Technologies
- Electrohydrodynamics and Fluid Dynamics
- Geophysical Methods and Applications
- Photoacoustic and Ultrasonic Imaging
- Advanced Sensor and Energy Harvesting Materials
- Advanced machining processes and optimization
- Ultrasound and Hyperthermia Applications
- Pickering emulsions and particle stabilization
- Structural Analysis of Composite Materials
- Material Properties and Processing
- Force Microscopy Techniques and Applications
Technical University of Darmstadt
2017-2024
Merck (Germany)
2022-2023
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...
We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body the guiding rod of such surgical with diameter 1.2 mm is used. In thinned area, near needle, gauge, as sensing element, applied flexible PCB for electrical connection. Two needles are built and characterized using testing machine. The sensors provide sensitivities 6.1 mV/N 6.4 only 1 mA supply current bridge, respectively....
Capacitive micromachined ultrasonic transducers (CMUTs) represent an accepted technology for transducers, while high bias voltage requirements and limited output pressure still need to be addressed. In this paper, we present a design ultra-low-voltage operation with enhanced pressure. Low voltages allow good integrability mobile applications, whereas higher pressures improve the penetration depth signal-to-noise ratio. The CMUT introduced has ultra-thin gap (120 nm), small plate thickness...
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...
Capacitive micromachined ultrasonic transducers (CMUTs) provide manifold advantages over ultrasound based on piezo-electric materials. However, a limited output pressure and high voltage requirement are still drawbacks to address. We present CMUT design with small geometrical measures for plate thickness, gap insulation layer, in order ensure low-voltage operation < 10 V. Three designs allow studying the bare piston effects identical diameter. The piston-like deflection intends overcome low...