Symposium AAA: Synthesis, Fabrication, and Assembly of Functional Particles and Capsules
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- April 9 - April 13, 2012
- Moscone West Convention Center | Marriott Marquis - San Francisco, California-
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Meeting Chairs:
Lara A. Estroff, Jun Liu, Kornelius Nielsch, Kazumi Wada
Particles and capsules have evolved during the past several decades from feedstock components for the fabrication of traditional materials to complex functional building blocks in advanced materials architectures. This evolution is congruent with the development of new synthesis techniques and progressive chemical and physical understanding at the molecular, nanoscopic, and microscopic scales. These new techniques offer an unprecedented level of control over the size, morphology, composition, and functionality of organic and inorganic particles and capsules. For example, layer-by-layer deposition has been used extensively to fabricate monodispersed polymeric capsules with multiple shell functionalities and applications ranging from drug delivery to nanostructured chemical sensors. Microfluidic techniques, based on droplet generation, have been used to fabricate microparticles and cap-sules from single- and double-emulsion drops for use in cell encapsulation, lightweight ceramics, and vesicle formation. Colloidal templating has been used to generate capsules, porous silica particles, and polymer composites. Similarly, substrate templates and flow lithography techniques have been used to generate microparticles from two-dimensional patterns for drug delivery applications. Finally, electrohydrodynamic techniques such as electro-spinning and electrospraying have been used to fabricate polymeric particles, capsules, and nanofibers for drug delivery and polymer composites.
Another fertile area of research is the development of techniques to assemble functional particles at surfaces, such as larger particles and substrates, to enable collective and enhanced functionality. For example, colloidal particles have been used to align particles in metastable arrangements such as lines and multilayer colloidal crystals. Templated surfaces have been used to guide the sedimentation of colloidal particles into cubic arrangements typically not observed in conventional sedimentation methods. Controlled drying of colloidal suspensions has been used to generate circular particle granules and centimeter-size colloidal crystals for photonic bandgap applications. Recently, the molecular ordering of liquid crystals has been used to order colloidal particles into linear and cubic patterns.
Despite the tremendous advances over the past several decades, many challenges remain, including the need for a full understanding of the assembly physics from the molecular to the micrometer scale, as well as the influence of external fields (e.g., electric and magnetic fields). New techniques are necessary to fabricate devices with heterogeneous and biocompatible surfaces for bio-analysis. Finally, scalable strategies are needed to translate these technologies into systems that can be implemented at an industrial scale.
The goal of this symposium is to discuss materials, engineering, chemistry and physics aspects related to the synthesis, fabrication, and assembly of functional particles and capsules and their use in energy and biomedical applications.
- Synthesis of (multi)functional particles (hydrophilic, hydrophobic and Janus particles)
- Fabrication of complex particles and capsules in microfluidic devices
- Template-based approaches to particle and capsule fabrication
- Capsules and particles for drug delivery
- Scalable methods for functional organic particle and capsule synthesis
- Particle assembly via external fields (electric, magnetic, gravitational, etc.)
- Use of particles to stabilize liquid/liquid and liquid/air interfaces
- Applications of particles and capsules in energy and biomedical applications
- Novel techniques for the characterization/metrology of capsules/particles and their assemblies
Kyoung-Shin Choi (Purdue Univ.),
Frank Caruso (Univ. of Melbourne, Australia),
Jin Woong Kim (Hanyang Univ., S. Korea),
Eugenia Kumacheva (Univ. of Toronto, Canada),
Marjorie Longo (Univ. of California, Davis),
Takasi Nisisako (Tokyo Inst. of Technology),
Darrin Pochan (Univ. of Delaware),
Orlin Velev (North Carolina State Univ.),
Younan Xia (Washington Univ.),
Jeff Youngblood (Purdue Univ.),
Liangfang Zhang (Univ. of California, San Diego).
Carlos J. Martinez
Purdue University, School of Materials Engineering
Neil Armstrong Hall of Engineering
701 W. Stadium Ave.
W. Lafayette, IN 47907- 2045
Tel 765-494-4100, Fax 765-494-1204
cjmartinez@purdue.edu
Zhiqun Lin
Iowa State University
Dept. of Materials Science and Engineering
3161 Gilman Hall
Ames, IA 50011-2300
Tel 515-294-9967, Fax 515-294-7202
zqlin@iastate.edu
Dong Ha Kim
Ewha Womans University, College of National Sciences
Dept. of Chemistry and Nano Science
Seoul 120-750, Korea
Tel 82-2-3277-4517, Fax 82-2-3277-3419
dhkim@ewha.ac.kr
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