Trapping and Driving Individual Charged Micro-particles in Fluid with an Electrostatic Device

Storage and injection of charged particles in an electrostatic trap

2014 Ion confinement in an purely electrostatic ion trap is investigated. The trap consists of two concentric cylinders maintained at a potential difference and two electrically insulated end plates. If the length of the trap is long compared with the radial dimension of the trap, the radial potential distribution is practically logarithmic. The domain of ion confinement is derived by comparing...

Electrostatic interactions between charged dielectric particles in an electrolyte solution.

Theory is developed to address a significant problem of how two charged dielectric particles interact in the presence of a polarizable medium that is a dilute solution of a strong electrolyte. The electrostatic force is defined by characteristic parameters for the interacting particles (charge, radius, and dielectric constant) and for the medium (permittivity and Debye length), and is expressed...

Paul trapping of charged particles in aqueous solution.

We experimentally demonstrate the feasibility of an aqueous Paul trap using a proof-of-principle planar device. Radio frequency voltages are used to generate an alternating focusing/defocusing potential well in two orthogonal directions. Individual charged particles are dynamically confined into nanometer scale in space. Compared with conventional Paul traps working in frictionless vacuum, the ...

The Efficiency of Scattering Charged Particles from the Radiation Belts with an Electrostatic Tether Structure

Introduction This report develops a simple model to calculate the rate of precipitation of particles trapped the earth’s magnetic field when they are scattered by an orbiting electrostatic tether and its plasma sheath. Together the tether and the sheath form an electrostatic structure that can scatter particles out of the radiation belts. This model is simple but capable of refinement; it gives...

Microfluidic Device Integration of Electrostatic Corral Trapping Systems