+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Single crystal growth and anisotropic crystal-fluid interfacial free energy in soft colloidal systems

Single crystal growth and anisotropic crystal-fluid interfacial free energy in soft colloidal systems

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 84(1 Pt 1): 011607-011607

We measure the anisotropy of the crystal-fluid interfacial free energy in soft colloidal systems. A temperature gradient is used to direct crystal nucleation and control the growth of large single crystals in order to achieve well-equilibrated crystal-fluid interfaces. Confocal microscopy is used to follow both the growth process and the equilibrium crystal-fluid interface at the particle scale: heterogeneous crystal nucleation, the advancing interface, and the stationary equilibrium interface. We use the measured growth velocity to determine the chemical potential difference between crystal and fluid phases. Well-equilibrated, large crystal-fluid interfaces are then used to determine the interfacial free energy and its anisotropy directly from thermally excited interface fluctuations. We find that while the measured average interfacial free energy is in good agreement with values found in simulations, the anisotropy is significantly larger than simulation values. Finally, we investigate the effect of impurities on the advancing interface. We determine the critical force needed to overcome impurity particles from the local interface curvature.

(PDF same-day service: $19.90)

Accession: 055793612

Download citation: RISBibTeXText

PMID: 21867183

DOI: 10.1103/PhysRevE.84.011607

Related references

Bcc crystal-fluid interfacial free energy in Yukawa systems. Journal of Chemical Physics 138(4): 044705-044705, 2013

The anisotropic hard-sphere crystal-melt interfacial free energy from fluctuations. Journal of Chemical Physics 125(9): 094710-094710, 2006

Crystal structure and interaction dependence of the crystal-melt interfacial free energy. Physical Review Letters 94(8): 086102-086102, 2005

The crystal-fluid interfacial free energy and nucleation rate of NaCl from different simulation methods. Journal of Chemical Physics 142(19): 194709-194709, 2015

The mold integration method for the calculation of the crystal-fluid interfacial free energy from simulations. Journal of Chemical Physics 141(13): 134709-134709, 2014

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres. Physical Review. E 93(2): 022601-022601, 2016

Anisotropic interfacial free energies of the hard-sphere crystal-melt interfaces. Journal of Physical Chemistry. B 109(14): 6500-6504, 2006

Facile fabrication of free-standing colloidal-crystal films by interfacial self-assembly. Journal of Colloid and Interface Science 353(1): 16-21, 2010

A simple anisotropic surface free energy function for three-dimensional phase field modeling of multi-crystalline crystal growth. Journal of Crystal Growth 362: 62-65, 2013

Crystal nucleation and the solid-liquid interfacial free energy. Journal of Chemical Physics 136(7): 074510-074510, 2012

Crystal-liquid interfacial free energy via thermodynamic integration. Journal of Chemical Physics 141(4): 044715-044715, 2014

Anisotropic magnetic properties and crystal electric field studies on CePd2Ge2 single crystal. Journal of Physics. Condensed Matter 25(43): 435603-435603, 2013

Hydrothermal single-crystal growth in the systems Ag/Hg/X/O (X = VV, AsV): crystal structures of (Ag3Hg)VO4, (Ag2Hg2)3(VO4)4, and (Ag2Hg2)2(HgO2)(AsO4)2 with the unusual tetrahedral cluster cations (Ag3Hg)3+ and (Ag2Hg2)4+ and crystal structure of AgHgVO4. Inorganic Chemistry 44(5): 1443-1451, 2005

Crystal-melt interfacial free energies of hard-dumbbell systems. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 74(3 Pt 1): 031611-031611, 2006

Direct calculation of the hard-sphere crystal /Melt interfacial free energy. Physical Review Letters 85(22): 4751-4754, 2000