The Physics of Evaporation-Induced Assembly of Sol-Gel Materials

HURD, ALAN J; STEINBERG, LEV

Title: The Physics of Evaporation-Induced Assembly of Sol-Gel Materials

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Abstract

Remarkable materials ordered at the nanoscale emerge when a sol-gel solution becomes co-organized with a surfactant. At sufficiently high concentration, the surfactant forms crystalline or liquid-crystalline arrays of micelles in the presence of the sol-gel, and as gelation proceeds the arrays become locked into the gel. Recent experiments demonstrate that the degree of order in the resulting mesoporous ceramic phase can be enhanced and controlled by continuous dip coating in which the solution, initially dilute, evolves through the critical micelle concentration by steady-state evaporation. The long-range order and microstructural orientation in these films suggest that the propagation of a critical-micelle-concentration transition front, with large physico-chemical gradients, promotes oriented self assembly of surfactant aggregates. This steep-gradient view is supported by results from unsteady evaporation of aerosols of similar solutions, in which internally well-ordered but complex particles are formed.

Authors:: HURD, ALAN J; STEINBERG, LEV

Publication Date:: Mon Jul 24 00:00:00 EDT 2000

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Org.:: US Department of Energy (US)

OSTI Identifier:: 759977

Report Number(s):: SAND2000-1798J
TRN: AH200031%%146

DOE Contract Number:: AC04-94AL85000

Resource Type:: Journal Article

Journal Name:: Granular Matters

Additional Journal Information:: Other Information: Submitted to Granular Matters; PBD: 24 Jul 2000

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; SOL-GEL PROCESS; MICELLAR SYSTEMS; CERAMICS; DIP COATING; EVAPORATION; GELATION; SURFACTANTS; MICROSTRUCTURE

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                    HURD, ALAN J, and STEINBERG, LEV. The Physics of Evaporation-Induced Assembly of Sol-Gel Materials.  United States: N. p., 2000. 
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                    HURD, ALAN J, & STEINBERG, LEV. The Physics of Evaporation-Induced Assembly of Sol-Gel Materials.  United States.

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                    HURD, ALAN J, and STEINBERG, LEV. 2000.  
        "The Physics of Evaporation-Induced Assembly of Sol-Gel Materials".  United States.  https://www.osti.gov/servlets/purl/759977.

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@article{osti_759977,

  title        = {The Physics of Evaporation-Induced Assembly of Sol-Gel Materials},

  author       = {HURD, ALAN J and STEINBERG, LEV},

  abstractNote = {Remarkable materials ordered at the nanoscale emerge when a sol-gel solution becomes co-organized with a surfactant. At sufficiently high concentration, the surfactant forms crystalline or liquid-crystalline arrays of micelles in the presence of the sol-gel, and as gelation proceeds the arrays become locked into the gel. Recent experiments demonstrate that the degree of order in the resulting mesoporous ceramic phase can be enhanced and controlled by continuous dip coating in which the solution, initially dilute, evolves through the critical micelle concentration by steady-state evaporation. The long-range order and microstructural orientation in these films suggest that the propagation of a critical-micelle-concentration transition front, with large physico-chemical gradients, promotes oriented self assembly of surfactant aggregates. This steep-gradient view is supported by results from unsteady evaporation of aerosols of similar solutions, in which internally well-ordered but complex particles are formed.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/759977},
  journal      = {Granular Matters},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Jul 24 00:00:00 EDT 2000},

  month        = {Mon Jul 24 00:00:00 EDT 2000}

}

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