Single-Source Magnetic Nanorattles By Using Convenient Emulsion Polymerization Protocols

Abstract

A novel strategy to achieve easily scalable magneto-responsive nanoceramics with core/shell and nanorattle-type or yolk/shell architectures based on a ferrocene-containing polymer precursor is described. Monodisperse nanorattle-type magnetic particles are obtained by using convenient semicontinuous emulsion polymerization and Stöber process protocols followed by thermal treatment. The particles are characterized by TGA, TEM, WAXS, DLS, XPS, and Raman spectroscopy. Herein, established synthetic protocols widen opportunities for the convenient bottom-up strategies of various ferrocene-precursor-based spherical architectures for advanced ceramics with potential applications within fields of sensing and stimuli-responsive nanophotonics.

Ferrocene-Modified Block Copolymers for the Preparation of Smart Porous Membranes

“…hint for successful ferrocene-modification, the residue as obtained after treatment at 600 °C turned out to be magnetic, which is typical for ferrocene-containing polymers after ceramization. [54,55] This finding is in good agreement with theoretical calculations for the iron content of the block copolymers. For comparison, a TGA of PFcMA ( Figure S2, Supplementary Materials) is given.…”

“…TGA measurement of the pristine and ferrocene-modified BCPs were performed up to a temperature of 600 • C. The residue of pure PS-b-PHEMA was determined to be 0.5%, whereas the residue of the ferrocene-functionalized block copolymer was determined to be 3.4%. As another hint for successful ferrocene-modification, the residue as obtained after treatment at 600 • C turned out to be magnetic, which is typical for ferrocene-containing polymers after ceramization [54,55]. This finding is in good agreement with theoretical calculations for the iron content of the block copolymers.…”

Functional Polymer Opals and Porous Materials by Shear‐Induced Assembly of Tailor‐Made Particles

“…This first example for hybrid opal film formation proves that the melt‐shear organization technique is not limited to pure organic core/shell particles but also to inorganic core particles as long as sufficient crosslinking for the comparably softer shell was implemented . Another example—showing that this technique can be universally applied—was the use of more complex nanoparticle architectures, i.e., magnetic nanorattle‐type particles . For this purpose, PFcMA‐containing particles, known to possess intriguing redox‐responsiveness and optical switching capabilities (see Section ), could be converted into magnetic nanorattles by thermal treatment.…”

The Renaissance of Side‐Chain Ferrocene‐Containing Polymers: Scope and Limitations of Vinylferrocene and Ferrocenyl Methacrylates

“…Recently, the self‐assembly and their template synthesis of triblock copolymers featuring a PFcMA block was investigated to yield ordered iron oxides and also the thermal conversion of dense PFcMA brushes attached on organic particles into iron oxide spheres was reported . Especially, PFcMA‐based (block co)polymers seem to be promising candidates as single‐source ceramic precursors and the novel and here‐described synthetic protocols widen possible applications in fields of advanced ceramics after convenient thermal treatment.…”