Construction of Yolk@shell Nanocomposite Particles with Controlled Multisized Pore Structures by Monomicelle Confined...

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Hollow nanoparticles offer tunable structures for various applications.
• Precisely controlling multisized macro/mesoporous structures in hollow nanomaterials remains challenging.

Purpose of the Study:

• To develop a highly controllable method for preparing asymmetric yolk@shell polydopamine@silica (PDA@SiO2) composite nanoparticles.
• To achieve tunable multisized pores within the nanoparticle shell.

Main Methods:

• Utilized a "polydopamine (PDA) expansion-shrinkage" strategy.
• Employed a monomicelle interfacial confined assembly method.
• Adjusted reaction temperature to control pore size.

Main Results:

• Successfully synthesized a series of asymmetric yolk@shell PDA@SiO2 nanoparticles.
• Demonstrated tunable multisized pores in the shell, with average pore sizes ranging from 15.4-86.5 nm.
• Showcased excellent performance in on-demand loading of dual-sized cargoes, dual-propelled nanomotors, and particle size-selected encapsulation and separation.

Conclusions:

• The developed strategy enables precise control over the structure of hollow nanomaterials.
• Asymmetric yolk@shell structures with tunable multisized pores have significant potential in biological and chemical applications.
• This work provides a foundation for designing advanced nanomaterials for targeted delivery and separation.