BCC-FCC, melting and reentrant transitions in colloidal crystals

P. M. Chaikin; P. Pincus; S. Alexander; D. Hone

doi:10.1016/0021-9797(82)90207-7

BCC-FCC, melting and reentrant transitions in colloidal crystals

P. M. Chaikin, P. Pincus, S. Alexander, D. Hone

Research output: Contribution to journal › Article › peer-review

Abstract

Charged colloids exhibit a variety of order-disorder and structural transitions. If the interactions can be treated in a Debye-Hückel approximation and if the dielectric constant of the solvent arises from free dipoles and follows a Curie law, the partition function is temperature independent and the system is athermal. If the dielectric constant of the solvent increases faster than linearly with inverse temperature (as is the case for H₂O) then the high-entropy phase occurs upon either heating or cooling from the more-ordered phase. As an illustration of these effects the FCC-BCC transition of colloidal crystals as a function of density and screening length is calculated.

Original language	English (US)
Pages (from-to)	555-562
Number of pages	8
Journal	Journal of Colloid And Interface Science
Volume	89
Issue number	2
DOIs	https://doi.org/10.1016/0021-9797(82)90207-7
State	Published - Oct 1982

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/0021-9797(82)90207-7

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title = "BCC-FCC, melting and reentrant transitions in colloidal crystals",

abstract = "Charged colloids exhibit a variety of order-disorder and structural transitions. If the interactions can be treated in a Debye-H{\"u}ckel approximation and if the dielectric constant of the solvent arises from free dipoles and follows a Curie law, the partition function is temperature independent and the system is athermal. If the dielectric constant of the solvent increases faster than linearly with inverse temperature (as is the case for H2O) then the high-entropy phase occurs upon either heating or cooling from the more-ordered phase. As an illustration of these effects the FCC-BCC transition of colloidal crystals as a function of density and screening length is calculated.",

author = "Chaikin, {P. M.} and P. Pincus and S. Alexander and D. Hone",

note = "Funding Information: We are pleased to acknowledge useful conversations with L. Kleinman and partial support form the National Science Foundation Grant DMR 80-08004 and the Office of Naval Research.",

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T1 - BCC-FCC, melting and reentrant transitions in colloidal crystals

AU - Chaikin, P. M.

AU - Pincus, P.

AU - Alexander, S.

AU - Hone, D.

N1 - Funding Information: We are pleased to acknowledge useful conversations with L. Kleinman and partial support form the National Science Foundation Grant DMR 80-08004 and the Office of Naval Research.

PY - 1982/10

Y1 - 1982/10

N2 - Charged colloids exhibit a variety of order-disorder and structural transitions. If the interactions can be treated in a Debye-Hückel approximation and if the dielectric constant of the solvent arises from free dipoles and follows a Curie law, the partition function is temperature independent and the system is athermal. If the dielectric constant of the solvent increases faster than linearly with inverse temperature (as is the case for H2O) then the high-entropy phase occurs upon either heating or cooling from the more-ordered phase. As an illustration of these effects the FCC-BCC transition of colloidal crystals as a function of density and screening length is calculated.

AB - Charged colloids exhibit a variety of order-disorder and structural transitions. If the interactions can be treated in a Debye-Hückel approximation and if the dielectric constant of the solvent arises from free dipoles and follows a Curie law, the partition function is temperature independent and the system is athermal. If the dielectric constant of the solvent increases faster than linearly with inverse temperature (as is the case for H2O) then the high-entropy phase occurs upon either heating or cooling from the more-ordered phase. As an illustration of these effects the FCC-BCC transition of colloidal crystals as a function of density and screening length is calculated.

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BCC-FCC, melting and reentrant transitions in colloidal crystals

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