Charged colloidal suspensions and their link to complex plasmas

Löwen, Hartmut; Royall, C. Patrick; Ivlev, A. V.; Morfill, G. E.; Nosenko, Vladimir Yu.; Shukła, P. K.; Thoma, Markus H.; Thomas, Hubertus M.

doi:10.1063/1.3659768

Cited by 7 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart from short ranged interactions, this model treats charged colloids as Yukawa particles. Thus colloids may be interpreted within a framework which encompasses a great many other systems from the mesons which Yukawa was originally interested in [2] to dusty, or complex plasmas [3,4]. Indeed, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Low‐Density Crystals in Charged Colloids: Comparison with Yukawa Theory

Anda

Statt

Turci

et al. 2015

Contrib. Plasma Phys.

View full text Add to dashboard Cite

Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle-resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction φ ≈ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.

show abstract

Section: Introductionmentioning

confidence: 99%

Low‐Density Crystals in Charged Colloids: Comparison with Yukawa Theory

Anda

Statt

Turci

et al. 2015

Contrib. Plasma Phys.

View full text Add to dashboard Cite

show abstract

“…This is the case because a dusty plasma is highly rarefied, so that dust particles are not overdamped by friction on the other components (gas, electrons, and ions). 43 Thus, the dust particles can move collectively with a flow velocity that is different from the average velocities of the other plasma components. This different flow velocity means that momentum in the dust component is described by a transport coefficient that is separate from those of the electrons, ions, and gas.…”

Section: Constitutive Relation For Viscositymentioning

confidence: 99%

Temperature dependence of viscosity in a two-dimensional dusty plasma without the effects of shear thinning

Haralson

Goree

2016

Physics of Plasmas

View full text Add to dashboard Cite

An experiment was designed to measure viscosity and its temperature dependence in a twodimensional dusty plasma. To avoid shear thinning while maintaining a uniform temperature, the shear flow and heating were provided separately, using different kinds of laser manipulation. The viscosity was found to be significantly higher than that was reported in three previous experiments most similar to ours, probably due to our avoidance of shear thinning. The viscosity increases linearly with the inverse temperature C, as predicted by simulations for a liquid-like strongly coupled plasma at low temperatures.

show abstract

“…In recent years, the research field of dusty or complex plasmas has been of interest due to its applications in space or solar plasmas (Goertz 1984(Goertz , 1989Mendis & Rosenberg 1994), plasma processing technologies (Selwyn, Heidenreich & Haller 1991;Watanabe 1997), fusion devices (Winter 2000), colloidal solutions (Löwen et al 2011), etc. For studying the collective dynamics of the dust grain medium, the charge on the dust grains has to be known.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the surface potential of magnetic and non-magnetic spherical objects in a magnetized radio-frequency discharge

et al. 2020

Self Cite

View full text Add to dashboard Cite

We report measurements of the time-averaged surface floating potential of magnetic and non-magnetic spherical probes (or large dust particles) immersed in a magnetized capacitively coupled discharge. In this study, the size of the spherical probes is taken greater than the Debye length. The surface potential of a spherical probe first increases, i.e. becomes more negative at low magnetic field ( $B < 0.05\ \textrm {T}$ ), attains a maximum value and decreases with further increase of the magnetic field strength ( $B > 0.05\ \textrm {T}$ ). The rate of change of the surface potential in the presence of a $B$ -field mainly depends on the background plasma and types of material of the objects. The results show that the surface potential of the magnetic sphere is higher (more negative) compared with the non-magnetic spherical probe. Hence, the smaller magnetic sphere collects more negative charges on its surface than a bigger non-magnetic sphere in a magnetized plasma. The different sized spherical probes have nearly the same surface potential above a threshold magnetic field ( $B > 0.03\ \textrm {T}$ ), implying a smaller role of size dependence on the surface potential of spherical objects. The variation of the surface potential of the spherical probes is understood on the basis of a modification of the collection currents to their surface due to charge confinement and cross-field diffusion in the presence of an external magnetic field.

show abstract

Charged colloidal suspensions and their link to complex plasmas

Cited by 7 publications

References 5 publications

Low‐Density Crystals in Charged Colloids: Comparison with Yukawa Theory

Low‐Density Crystals in Charged Colloids: Comparison with Yukawa Theory

Temperature dependence of viscosity in a two-dimensional dusty plasma without the effects of shear thinning

Comparative study of the surface potential of magnetic and non-magnetic spherical objects in a magnetized radio-frequency discharge

Contact Info

Product

Resources

About