Journal
ACS NANO
Volume 10, Issue 1, Pages 1425-1433Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06890
Keywords
flash nanoprecipitation; colloids; simulation; experiments; self-assembly
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Funding
- Princeton Center for Complex Materials (PCCM), a U.S. National Science Foundation Materials Research Science and Engineering Center [DMR-0819860, DMR-1420541]
- German Research Foundation (DFG) [NI 1487/2-1]
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We studied the directed assembly of soft nanoparticles through rapid micromixing of polymers in solution with a nonsolvent. Both experiments and computer simulations were performed to elucidate the underlying physics and to investigate the role of various process parameters. In particular, we discovered that no external stabilizing agents or charged end groups are required to keep the colloids separated from each other when water is used as the nonsolvent. Furthermore, the size of the nanoparticles can be reliably tuned through the mixing rate and the ratio between polymer solution and nonsolvent. Our results demonstrate that this mechanism is highly promising for the mass fabrication of uniformly sized colloidal particles, using a wide variety of polymeric feed materials.
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