Phase separation of two-dimensional Coulombic crystals of mesoscale dipolar particles from mesoscale polarizable "solvent"

George K. Kaufman; Meital Reches; Samuel W. Thomas; Ji Feng; Bryan F. Shaw; George M. Whitesides

doi:10.1063/1.3052616

Phase separation of two-dimensional Coulombic crystals of mesoscale dipolar particles from mesoscale polarizable "solvent"

George K. Kaufman, Meital Reches, Samuel W. Thomas, Ji Feng, Bryan F. Shaw, George M. Whitesides

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

12 Scopus citations

Abstract

This letter describes the formation of two-dimensional (2D) crystals of dipolar particles (TN) made of electrostatically charged, joined, millimeter-scale Teflon (T) and nylon-6,6 (N) spheres, and the separation of these crystals, as a distinct phase, from a mixture of TN and similar, capacitively charged particles that were coated with gold (Au2). The extent of separation increased with increasing amplitude of agitation, and with decreasing density of particles. Above a threshold in the amplitude of agitation, the crystals broke apart and the particles remixed. This system is a 2D model of the nucleation of crystals of polar molecules in a polarizable liquid.

Original language	English
Article number	044102
Journal	Applied Physics Letters
Volume	94
Issue number	4
DOIs	https://doi.org/10.1063/1.3052616
State	Published - 2009
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by the DOE (DE-FG05-00ER45852). The NSF (CHE-0518055), DARPA/ARO (W911NF-04-1-0170), and the Xerox Corporation provided support for salaries. We thank Professor Z. Suo and X. Zhao for helpful discussions, D. Co, T. Hanisco, and D. Wilmouth for assistance with the construction of the apparatus, the NSF and MRSEC for a stipend through Grant No. DMR-0213805 (G.K.K.), as well as the support of EMBO and HFSP (M.R.), the American Cancer Society (S.W.T.), and the NIH (B.F.S.) for postdoctoral fellowships.

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abstract = "This letter describes the formation of two-dimensional (2D) crystals of dipolar particles (TN) made of electrostatically charged, joined, millimeter-scale Teflon (T) and nylon-6,6 (N) spheres, and the separation of these crystals, as a distinct phase, from a mixture of TN and similar, capacitively charged particles that were coated with gold (Au2). The extent of separation increased with increasing amplitude of agitation, and with decreasing density of particles. Above a threshold in the amplitude of agitation, the crystals broke apart and the particles remixed. This system is a 2D model of the nucleation of crystals of polar molecules in a polarizable liquid.",

author = "Kaufman, {George K.} and Meital Reches and Thomas, {Samuel W.} and Ji Feng and Shaw, {Bryan F.} and Whitesides, {George M.}",

note = "Funding Information: This research was supported by the DOE (DE-FG05-00ER45852). The NSF (CHE-0518055), DARPA/ARO (W911NF-04-1-0170), and the Xerox Corporation provided support for salaries. We thank Professor Z. Suo and X. Zhao for helpful discussions, D. Co, T. Hanisco, and D. Wilmouth for assistance with the construction of the apparatus, the NSF and MRSEC for a stipend through Grant No. DMR-0213805 (G.K.K.), as well as the support of EMBO and HFSP (M.R.), the American Cancer Society (S.W.T.), and the NIH (B.F.S.) for postdoctoral fellowships.",

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doi = "10.1063/1.3052616",

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T1 - Phase separation of two-dimensional Coulombic crystals of mesoscale dipolar particles from mesoscale polarizable "solvent"

AU - Kaufman, George K.

AU - Reches, Meital

AU - Thomas, Samuel W.

AU - Feng, Ji

AU - Shaw, Bryan F.

AU - Whitesides, George M.

N1 - Funding Information: This research was supported by the DOE (DE-FG05-00ER45852). The NSF (CHE-0518055), DARPA/ARO (W911NF-04-1-0170), and the Xerox Corporation provided support for salaries. We thank Professor Z. Suo and X. Zhao for helpful discussions, D. Co, T. Hanisco, and D. Wilmouth for assistance with the construction of the apparatus, the NSF and MRSEC for a stipend through Grant No. DMR-0213805 (G.K.K.), as well as the support of EMBO and HFSP (M.R.), the American Cancer Society (S.W.T.), and the NIH (B.F.S.) for postdoctoral fellowships.

PY - 2009

Y1 - 2009

N2 - This letter describes the formation of two-dimensional (2D) crystals of dipolar particles (TN) made of electrostatically charged, joined, millimeter-scale Teflon (T) and nylon-6,6 (N) spheres, and the separation of these crystals, as a distinct phase, from a mixture of TN and similar, capacitively charged particles that were coated with gold (Au2). The extent of separation increased with increasing amplitude of agitation, and with decreasing density of particles. Above a threshold in the amplitude of agitation, the crystals broke apart and the particles remixed. This system is a 2D model of the nucleation of crystals of polar molecules in a polarizable liquid.

AB - This letter describes the formation of two-dimensional (2D) crystals of dipolar particles (TN) made of electrostatically charged, joined, millimeter-scale Teflon (T) and nylon-6,6 (N) spheres, and the separation of these crystals, as a distinct phase, from a mixture of TN and similar, capacitively charged particles that were coated with gold (Au2). The extent of separation increased with increasing amplitude of agitation, and with decreasing density of particles. Above a threshold in the amplitude of agitation, the crystals broke apart and the particles remixed. This system is a 2D model of the nucleation of crystals of polar molecules in a polarizable liquid.

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Phase separation of two-dimensional Coulombic crystals of mesoscale dipolar particles from mesoscale polarizable "solvent"

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