Precision measurement of tribocharging in acoustically levitated sub-millimeter grains.

@article{Kline2019PrecisionMO,
  title={Precision measurement of tribocharging in acoustically levitated sub-millimeter grains.},
  author={Adam G. Kline and Melody X. Lim and Heinrich M. Jaeger},
  journal={The Review of scientific instruments},
  year={2019},
  volume={91 2},
  pages={
          023908
        }
}
Contact electrification of dielectric grains forms the basis for a myriad of physical phenomena. However, even the basic aspects of collisional charging between grains are still unclear. Here, we develop a new experimental method, based on acoustic levitation, which allows us to controllably and repeatedly collide two sub-millimeter grains and measure the evolution of their electric charges. This is, therefore, the first tribocharging experiment to provide complete electric isolation for the… 
View on PubMed
arxiv.org
9 Citations
Background Citations
2

Figures from this paper

9 Citations

Violation of triboelectric charge conservation on colliding particles.

In microgravity experiments, the net charge on systems of two identical, 434-μm-diameter glass spheres before and after a collision is quantified and it is found that charge conservation is significantly violated.

Electrostatic charging due to individual particle-particle collisions

Measuring electric dipole moments of trapped sub-mm particles

The charging characteristics of particle–particle contact

Quantifying Contact‐Electrification Induced Charge Transfer on a Liquid Droplet after Contacting with a Liquid or Solid

The results show that the silicone oil droplet prefers to receive negative charges from a negatively charged aqueous droplet rather than positive charges from an positively charged aQueous Droplet, which provides a strong evidence about the dominant role played by electron transfer in the liquid-liquid CE.

Evaluating the electrostatic charge transfer model for particle-particle interactions

Effect of gas properties on particle charging and wall fouling in gas-solids fluidized beds

Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.

Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring…

Surface-resolved dynamic simulation of charged non-spherical particles

References

SHOWING 1-10 OF 43 REFERENCES

Collisional Charging of Individual Sub-Millimeter Particles: Using Ultrasonic Levitation to Initiate and Track Charge Transfer

Electrostatic charging of insulating fine particles can be responsible for numerous phenomena ranging from lightning in volcanic plumes to dust explosions. However, even basic aspects of how fine…

Acoustophoretic contactless transport and handling of matter in air

A path-breaking concept is proposed to harvest the significant benefits of acoustic levitation in air by allowing continuous planar transport and processing of multiple objects, from near-spherical to wire-like, without being limited by the acoustic wavelength.

Size-Dependent Same-Material Tribocharging in Insulating Grains

Observations of flowing granular matter have suggested that same-material tribocharging de- pends on particle size, rendering large grains positive and small ones negative. Models assuming the…

Sticking and restitution in collisions of charged sub-mm dielectric grains

In microgravity experiments, dielectric spherical glass grains of 225 μm radius with electrical charges between 105 e and 107 e collide with a metal wall. Collision velocities range from about 0.01…

Experiments on Collisional Grain Charging of Micron-sized Preplanetary Dust

Collisions between micron-sized grains and larger objects with velocities up to several 10 m s-1 are believed to be an important physical process in the solar nebula with respect to the preplanetary…

Temperature dependence of nylon and PTFE triboelectrification

Contact electrification, or tribocharging, is pertinent to a broad range of industrial and natural processes involving dielectric materials. However, the basic mechanism by which charge is…

Holographic acoustic elements for manipulation of levitated objects

The phases used to drive an ultrasonic phased array are optimized and it is shown that acoustic levitation can be employed to translate, rotate and manipulate particles using even a single-sided emitter.

Electrostatic charging during the flow of grains from a cylinder

Cluster formation via sonic depletion forces in levitated granular matter.

The properties of small clusters can differ dramatically from the bulk phases of the same constituents. In equilibrium, cluster assembly has been recently explored, whereas out of equilibrium, the…

Observation of a Single-Beam Gradient Force Acoustical Trap for Elastic Particles: Acoustical Tweezers.

The trapping of elastic particles by the large gradient force of a single acoustical beam in three dimensions is demonstrated, demonstrating the large spectrum of frequencies covered by coherent ultrasonic sources and could open the way to important applications in biology and biophysics at the cellular scale and for the design of acoustic machines in microfluidic environments.