Ellipsoidal Particle Fabrication
Ellipsoidal Particle Fabrication - Related Videos
01:28
Geoid and Ellipsoid
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2025
The Earth's shape is best described as an ellipsoid, a slightly flattened sphere created by rotating an ellipse around its minor axis. This flattening results in the polar axis being about 21 kilometers shorter than the equatorial axis. In contrast, the geoid represents the Earth's gravitational shape and aligns with the mean sea level (MSL). The geoid is an irregular equipotential surface where gravity is perpendicular at every point. Variations in Earth's mass distribution cause geoid...
10:14
Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles
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Cited by 16 •
2016
Acoustofluidic devices use ultrasonic waves within microfluidic channels to manipulate, concentrate and isolate suspended micro and nanoscopic entities. This protocol describes the fabrication and operation of such a device supporting bulk acoustic standing waves to focus particles in a central streamline without the aid of sheath fluids.
09:55
Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array
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Cited by 2 •
2017
In this article, a simple method to prepare partially or fully coated metallic particles and to perform AC electrokinetic property measurements with a rapidly fabricated indium tin oxide (ITO) electrode array is demonstrated.
12:33
Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
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Cited by 25 •
2013
We describe experimental details of the synthesis of patterned and reconfigurable particles from two dimensional (2D) precursors. This methodology can be used to create particles in a variety of shapes including polyhedra and grasping devices at length scales ranging from the micro to centimeter scale.
16:31
Echo Particle Image Velocimetry
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Cited by 10 •
2012
An echo particle image velocimetry (EPIV) system capable of acquiring two-dimensional fields of velocity in optically opaque fluids or through optically opaque geometries is described, and validation measurements in pipe flow are reported.
FAQs
Aspect ratio changes how particles move, interact, and assemble compared with spherical particles. Increasing elongation provides a way to tune these behaviors, while the particle’s surface properties add another control over interactions. In environmental studies, this tunability helps researchers examine how particle shape influences the transport and deposition of suspended matter under different water, soil, and porous-media conditions.
Several routes can alter initially spherical droplets or polymer particles, including stretching, template-based processing, and controlled flow. Each route supplies a different means of setting the particle geometry before the structure is fixed. The altered shape must then be solidified or otherwise stabilized so that the particles retain their anisotropic form during later environmental experiments.
Surface properties influence how fabricated particles interact with their surroundings and with one another. When combined with a tunable elongated shape, they support investigations of colloidal stability, pollutant capture, and particle-based sensing. This combination allows environmental researchers to separate or compare the effects of geometry and surface behavior when studying particle interactions in complex media.
A typical workflow begins with spherical droplets or polymer particles, followed by a shape-changing step such as stretching, template-based processing, or controlled flow. The particles are then subjected to solidification or stabilization to preserve the altered geometry. Controlling both the deformation stage and the final stabilization is essential for obtaining particles with the intended aspect ratio and usable surface characteristics.
Fabricated particles provide controllable models for examining the movement and deposition of suspended matter in water, soil, and porous media. Researchers can vary particle elongation and surface properties to investigate how these characteristics affect environmental behavior. The resulting comparisons help connect particle structure with transport and deposition patterns without relying only on naturally variable suspended materials.
They are useful when a study needs particle geometry and surface behavior to be adjusted together. Elongated particles can serve as model systems for pollutant capture and filtration investigations, while their tunable surfaces support particle-based sensing studies. These applications take advantage of fabrication control to explore how shape and surface characteristics influence environmental interactions and functional performance.