Results 71 to 80 of about 7,901 (186)

The acoustic force density acting on inhomogeneous fluids in acoustic fields [PDF]

open access: yes, 2016
We present a theory for the acoustic force density acting on inhomogeneous fluids in acoustic fields on time scales that are slow compared to the acoustic oscillation period.
Augustsson, Per   +2 more
core   +4 more sources

Multimodal Actuation and Environment Adaptive Strategies of Bio‐Inspired Micro/Nanorobots in Precision Medicine

open access: yesAdvanced Robotics Research, EarlyView.
An introduction for multidrive and environment‐adaptive micro/nanorobotics: design and fabrication strategies, intelligent actuation, and their applications. Various intelligent actuation approaches—magnetic, acoustic, optical, chemical, and biological—can be synergistically designed to enhance flexibility and adaptive behavior for precision medicine ...
Aiqing Ma   +10 more
wiley   +1 more source

Frozen Waves: Stationary optical wavefields with arbitrary longitudinal shape, by superposing equal-frequency Bessel beams

open access: yes, 2004
In this paper it is shown how one can use Bessel beams to obtain a stationary localized wavefield with high transverse localization, and whose longitudinal intensity pattern can assume any desired shape within a chosen interval 0 < z < L of the ...
Zamboni-Rached, M.
core   +1 more source

Tumbling Magnetic Microrobots for Targeted In Vivo Drug Delivery in the GI Tract

open access: yesAdvanced Robotics Research, EarlyView.
We introduce a microrobot design and integrated system for on‐demand targeted drug release in the gastrointestinal tract. The microrobot has an embedded magnet for actuation with external magnetic fields and is visualized in real time using ultrasound. It has two drug release ports sealed with a thermally sensitive wax. Local heating of the wax using a
Aaron C. Davis   +7 more
wiley   +1 more source

Optimizing Polymer Lab-on-Chip Platforms for Ultrasonic Manipulation: Influence of the Substrate

open access: yesMicromachines, 2015
The choice of substrate material in a chip that combines ultrasound with microfluidics for handling biological and synthetic microparticles can have a profound effect on the performance of the device.
Itziar González   +7 more
doaj   +1 more source

Particle assembly with synchronized acoustical tweezers

open access: yes, 2019
The contactless selective manipulation of individual objects at the microscale is powerfully enabled by acoustical tweezers based on acoustical vortices [Baudoin et al., Sci. Adv., 5:eaav1967 (2019)].
Baudoin, Michael, Gong, Zhixiong
core   +2 more sources

Theory of pressure acoustics with boundary layers and streaming in curved elastic cavities [PDF]

open access: yes, 2018
The acoustic fields and streaming in a confined fluid depend strongly on the acoustic boundary layer forming near the wall. The width of this layer is typically much smaller than the bulk length scale set by the geometry or the acoustic wavelength, which
Henrik Bruus   +6 more
core   +2 more sources

Waveguide Photoactuators: Materials, Fabrication, and Applications

open access: yesAdvanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi   +4 more
wiley   +1 more source

Interactive manipulation of microparticles in an octagonal sonotweezer [PDF]

open access: yes, 2013
An ultrasonic device for micro-patterning and precision manipulation of micrometre-scale particles is demonstrated. The device is formed using eight piezoelectric transducers shaped into an octagonal cavity.
Beeley, J.   +4 more
core   +1 more source

Precise Regulation of Membrane Proteins: From Physical Technology to Biomolecular Strategy

open access: yesAdvanced Science, EarlyView.
This review summarizes the emerging strategies for the precise regulation of membrane proteins using physical stimuli and biomolecule‐based tools. These methods provide new insights into cell regulation and offer promising directions for future disease treatment.
Xiu Zhao   +6 more
wiley   +1 more source

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