Tiny nanoparticles of organometallic polymers through the direct disassembly-assisted synthesis strategy for hydrogen peroxide sensing

Abstract

Hybrid nanostructures present a catalog of promising functional materials with a broad range of applications. Structural control has been proved versatile to optimize functions and properties of the nanomaterials. Although polymer/inorganic hybrid nanoparticles have been achieved through selfassembly of block copolymers, synthesis of hybrid nanoparticles with small size (≤20 nm) remains challenging. Herein, we developed a conceptually new approach for efficient and scalable synthesis of 10 polymer/inorganic hybrid nanoparticles with well-defined shape and tiny size through direct disassemblyassisted synthesis (DDAS) strategy. Incorporating cyanoferrate into polypeptides led to disassembly of large hexagonally-packed structures of polypeptide α-helices into small aggregates. Subsequent coordination polymerization of the cyanoferrate groups with Fe 3+ in aqueous media afforded polypeptide/Prussian blue (PB) hybrid nanoparticles with well-defined core-shell structures. Hybrid 15 nanoparticles were thoroughly characterized. Morphological and microstructural analyses showed that the hybrid nanoparticles had small size of approximately 18 nm and crystalline PB phase. Taking advantage of tiny size and crystalline PB phase, the hybrid nanoparticles showed excellent electrocatalytic activity toward reduction of hydrogen peroxide. Such direct disassembly-assisted synthesis of polymer/inorganic tiny nanoparticles provides a family of functional nanomaterials useful for biosensing and nanodevice 20 applications. 65 spheres were achieved by means of direct assembly of goldcontaining block copolymers. 34,35 Recently, tiny nanoparticles with small size have received particular interests, because the surface area of nanoparticles A conceptually new approach for synthesis of tiny hybrid nanoparticles through direct disassembly-assisted synthesis (DDAS) strategy has been developed.

Preparation of Prussian Blue Containing Polymeric Nanocapsule via Interfacial Confined Coordination in Crosslinked Inverse Miniemulsion

“…However, the absorbance signal is not high, it is due to the low concentration of PB (lower than 0.074 mg·mL −1 ). This phenomenon was also observed in Liang’s report [ 23 ]. Another possible reason which may affect the signal is that the system is heterogeneous due to particle stacking induced by coordination.…”

“…For example, Fe 3+ ions underwent metal coordination at the periphery of the miniemulsion prepared using pentacyanoferate-terminated PEO-PPO-PEO triblock copolymer stabilizers, leading to the formation of Prussian blue nanoshell [ 21 ]. Recently, Liang et al developed an approach for scalable synthesis of polymer/PB hybrid nanoparticles with tiny size through the direct disassembly-assisted synthesis strategy [ 23 ].…”

Progress in the preparation of Prussian blue-based nanomaterials for biomedical applications

“…Zhu et al developed a direct decomposition-assisted synthesis (DDAS) strategy for the efficient and scalable synthesis of polymer/inorganic hybrid nanoparticles with well-defined shapes and tiny sizes (20 nm). 129 Incorporation of ferricyanide into a polypeptide resulted in the disassembly of the large hexagonal packing structure of the polypeptide alpha-helix into small aggregates. Subsequent coordination polymerization of ferricyanate groups and Fe 3+ in aqueous medium resulted in polypeptide@PB hybrid nanoparticles with a core–shell structure of about 18 nm (Fig.…”