Freely Jointed Polymers Made of Droplets
| Autor: | Miranda Holmes-Cerfon, Jasna Brujic, Francesco Sciortino, Angus McMullen, Alexander Y. Grosberg |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Quantitative Biology::Biomolecules Valence (chemistry) Materials science General Physics and Astronomy 02 engineering and technology Temperature cycling Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Condensed Matter::Soft Condensed Matter Physics and Astronomy (all) chemistry Polymerization Chemical physics Kuhn length 0210 nano-technology |
| Zdroj: | Physical Review Letters. 121 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.121.138002 |
| Popis: | An important goal of self-assembly is to achieve a preprogrammed structure with high fidelity. Here, we control the valence of DNA-functionalized emulsions to make linear and branched model polymers, or "colloidomers." The distribution of cluster sizes is consistent with a polymerization process in which the droplets achieve their prescribed valence. Conformational statistics reveal that the chains are freely jointed, so that the Kuhn length is close to one bead diameter. The end-to-end length scales with the number of bonds N as N^{ν}, where ν≈3/4, in agreement with the Flory theory in two dimensions. The chain diffusion coefficient D approximately scales as D∝N^{-ν}, as predicted by the Zimm model. Unlike molecular polymers, colloidomers can be repeatedly assembled and disassembled under temperature cycling, allowing for reconfigurable, responsive matter. |
| Databáze: | OpenAIRE |
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