Superparamagnetic colloidal chains prepared via Michael-addition

[Display omitted] As colloidal particles have proven to be excellent macroscopic models of atomic systems, colloidal assemblies may provide good molecular analogs. For example, chains of colloids could mimic synthetic polymeric or natural biological molecules such as proteins and DNA; however, metho...

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Veröffentlicht in:Colloids and surfaces. A, Physicochemical and engineering aspects Jg. 540; S. 23 - 28
Hauptverfasser: Yang, Tao, Marr, David W.M., Wu, Ning
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 05.03.2018
Schlagworte:
Classical polymer theory
colloids
DNA
Flexibility
magnetic fields
mechanical properties
proteins
Stability
statistics
Superparamagnetic chains
temperature
Thiol-maleimide Michael addition
Classical polymer theory
Stability
Thiol-maleimide Michael addition
Flexibility
Superparamagnetic chains
ISSN:0927-7757, 1873-4359
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Zusammenfassung:[Display omitted] As colloidal particles have proven to be excellent macroscopic models of atomic systems, colloidal assemblies may provide good molecular analogs. For example, chains of colloids could mimic synthetic polymeric or natural biological molecules such as proteins and DNA; however, methods for the assembly of such colloidal structures are still limited. Here, we use an external magnetic field to align functionalized superparamagnetic spheres into linear chains of different lengths. We further use Michael-addition to chemically link neighboring monomers and investigate mechanical properties of the synthesized chains as a function of reaction temperature, time, and linker length. We find that both the number average chain length and chain flexibility are greater for chains prepared with longer linker lengths. We also find that chain lengths decay over time with rates that increase with lower reaction temperature and shorter linker length. Both the chain formation statistics and temporal stability of magnetic chains can be well explained by classical polymer-growth theories.
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ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2017.12.044