Particle Trapping
Particle Trapping - Related Videos
07:20
Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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2017
We describe a procedure to optically trap micro-particles in nanoplasmonic optical lattice.
10:13
A Microfluidic-based Hydrodynamic Trap for Single Particles
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Cited by 14 •
2011
In this article, we present a microfluidic-based method for particle confinement based on hydrodynamic flow. We demonstrate stable particle trapping at a fluid stagnation point using a feedback control mechanism, thereby enabling confinement and micromanipulation of arbitrary particles in an integrated microdevice.
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
01:41
Social Traps
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2020
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Cited by 19 •
2017
This paper presents a microfabrication methodology for surface ion traps, as well as a detailed experimental procedure for trapping ytterbium ions in a room-temperature environment.
FAQs
The key operating condition is a balance between particle motion and an externally generated force. Depending on the setup, that force may come from focused light, acoustic fields, electric fields, magnetic gradients, or fluid flow. When the balance is controlled, researchers can immobilize or manipulate microscopic objects with enough precision to study their behavior or handle them.
Particle trapping can use different force sources rather than a single universal mechanism. Focused light, acoustic fields, electric fields, magnetic gradients, and fluid flow each provide an externally applied means of countering particle motion. This range allows a bioengineering experiment to match the trapping approach to its object and intended measurement or manipulation task.
Because the particle can be controlled without direct contact, the measurement or handling process does not require physically touching the object. This feature is especially relevant when researchers study cells, biomolecules, or engineered particles. In bioengineering, it supports precise single-cell analysis, cellular-mechanics characterization, and the development of diagnostic tools and biosensors.
A microfluidic device can provide the setting in which trapping and particle motion are controlled at small scales. Within that environment, a force source such as fluid flow can be balanced against motion to position or retain an object. This arrangement supports precise handling for cell sorting, targeted assembly, and studies requiring controlled manipulation of individual particles.
A basic workflow begins by selecting the microscopic object and the intended operation, then placing it in a trapping environment and applying an external force source. Researchers balance that force against particle motion to immobilize or manipulate the object. The trapped particle can then be studied or handled for analysis, sorting, assembly, or drug delivery research.
Particle trapping supports several distinct bioengineering tasks. Cell sorting uses controlled manipulation of cells, while single-cell analysis focuses measurements on individual cells. The same capability contributes to targeted assembly and drug delivery research. These applications range from investigating biological behavior to designing microscale systems that handle cells or engineered particles with greater precision.
By immobilizing or manipulating selected microscopic objects, trapping methods create controlled conditions for studying cellular mechanics and characterizing particles. They also contribute to diagnostic tools and biosensors, where precise handling supports measurements at small scales. The value extends beyond particle retention to improved experimental control and the development of microscale therapeutic systems.