Charged particles on surfaces: Coexistence of dilute phases and periodic structures at interfaces

Sharon M. Loverde, Francisco Solis, Monica Olvera De La Cruz

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We consider a mixture of two immiscible oppositely charged molecules strongly adsorbed to an interface, with a neutral nonselective molecular background. We determine the coexistence between a high density ionic periodic phase and a dilute isotropic ionic phase. We use a strong segregation approach for the periodic phase and determine the one-loop free energy for the dilute phase. Lamellar and hexagonal patterns are calculated for different charge stoichiometries of the mixture. Molecular dynamics simulations exhibit the predicted phase behavior. The periodic length scale of the solid phase is found to scale as ε/(lBψ3/2), where ψ is the effective charge density, lB is the Bjerrum length, and ε is the cohesive energy.

Original languageEnglish (US)
Article number237802
JournalPhysical Review Letters
Volume98
Issue number23
DOIs
StatePublished - Jun 6 2007

Fingerprint

charged particles
solid phases
stoichiometry
free energy
molecular dynamics
molecules
simulation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Charged particles on surfaces : Coexistence of dilute phases and periodic structures at interfaces. / Loverde, Sharon M.; Solis, Francisco; De La Cruz, Monica Olvera.

In: Physical Review Letters, Vol. 98, No. 23, 237802, 06.06.2007.

Research output: Contribution to journalArticle

@article{9edaa71696bb48ef99584ddf239715f5,
title = "Charged particles on surfaces: Coexistence of dilute phases and periodic structures at interfaces",
abstract = "We consider a mixture of two immiscible oppositely charged molecules strongly adsorbed to an interface, with a neutral nonselective molecular background. We determine the coexistence between a high density ionic periodic phase and a dilute isotropic ionic phase. We use a strong segregation approach for the periodic phase and determine the one-loop free energy for the dilute phase. Lamellar and hexagonal patterns are calculated for different charge stoichiometries of the mixture. Molecular dynamics simulations exhibit the predicted phase behavior. The periodic length scale of the solid phase is found to scale as ε/(lBψ3/2), where ψ is the effective charge density, lB is the Bjerrum length, and ε is the cohesive energy.",
author = "Loverde, {Sharon M.} and Francisco Solis and {De La Cruz}, {Monica Olvera}",
year = "2007",
month = "6",
day = "6",
doi = "10.1103/PhysRevLett.98.237802",
language = "English (US)",
volume = "98",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",

}

TY - JOUR

T1 - Charged particles on surfaces

T2 - Coexistence of dilute phases and periodic structures at interfaces

AU - Loverde, Sharon M.

AU - Solis, Francisco

AU - De La Cruz, Monica Olvera

PY - 2007/6/6

Y1 - 2007/6/6

N2 - We consider a mixture of two immiscible oppositely charged molecules strongly adsorbed to an interface, with a neutral nonselective molecular background. We determine the coexistence between a high density ionic periodic phase and a dilute isotropic ionic phase. We use a strong segregation approach for the periodic phase and determine the one-loop free energy for the dilute phase. Lamellar and hexagonal patterns are calculated for different charge stoichiometries of the mixture. Molecular dynamics simulations exhibit the predicted phase behavior. The periodic length scale of the solid phase is found to scale as ε/(lBψ3/2), where ψ is the effective charge density, lB is the Bjerrum length, and ε is the cohesive energy.

AB - We consider a mixture of two immiscible oppositely charged molecules strongly adsorbed to an interface, with a neutral nonselective molecular background. We determine the coexistence between a high density ionic periodic phase and a dilute isotropic ionic phase. We use a strong segregation approach for the periodic phase and determine the one-loop free energy for the dilute phase. Lamellar and hexagonal patterns are calculated for different charge stoichiometries of the mixture. Molecular dynamics simulations exhibit the predicted phase behavior. The periodic length scale of the solid phase is found to scale as ε/(lBψ3/2), where ψ is the effective charge density, lB is the Bjerrum length, and ε is the cohesive energy.

UR - http://www.scopus.com/inward/record.url?scp=34547308120&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547308120&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.98.237802

DO - 10.1103/PhysRevLett.98.237802

M3 - Article

C2 - 17677935

AN - SCOPUS:34547308120

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 23

M1 - 237802

ER -