期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 7, 页码 4075-4080出版社
AMER CHEMICAL SOC
DOI: 10.1021/am507964k
关键词
multiphasic particles; precise patterning; particles fabrication; patterned surfaces; wettability
资金
- National Science Foundation [1351412]
- Nanomanufacturing program [1351412]
- Air Force Office of Scientific Research (AFOSR) [FA9550-10-1-0523]
- Office of Naval Research (ONR) [N00014-12-1-0874]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1351412] Funding Source: National Science Foundation
Precise control over the geometry and chemistry of multiphasic particles is of significant importance for a wide range of applications. In this work, we have developed one of the simplest methodologies for fabricating monodisperse, multiphasic micro- and nanoparticles possessing almost any composition, projected shape, modulus, and dimensions as small as 25 nm. The synthesis methodology involves the fabrication of a nonwettable surface patterned with monodisperse, wettable domains of different sizes and shapes. When such patterned templates are dip-coated with polymer solutions or particle dispersions, the liquids, and consequently the polymer or the particles, preferentially self-assemble within the wettable domains. Utilizing this phenomenon, we fabricate multiphasic assemblies with precisely controlled geometry and composition through multiple, layered depositions of polymers and/or particles within the patterned domains. Upon releasing these multiphasic assemblies from the template using a sacrificial layer, we obtain multiphasic particles. The templates can then be readily reused (over 20 times in our experiments) for fabricating a new batch of particles, enabling a rapid, inexpensive, and easily reproducible method for large-scale manufacturing of multiphasic particles.
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