Advances in Magnetic Nanomaterials, Ferrofluids, and Ferrogels: From Structure to Biomedical and Engineering...

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Magnetic nanomaterials, ferrofluids, and ferrogels are advanced materials with unique properties.
• Their integration offers potential for novel applications in medicine and engineering.

Purpose of the Study:

• To comprehensively review magnetic nanomaterials, ferrofluids, and ferrogels.
• To explore their structural characteristics, preparation, and applications.
• To identify current challenges and future research directions.

Main Methods:

• Systematic review of existing literature.
• Analysis of structural characteristics and dynamic behaviors.
• Examination of preparation techniques (green synthesis, chemical synthesis, cross-linking).

Main Results:

• Particle size and dispersibility significantly impact functional efficiency (e.g., specific absorption rate for hyperthermia).
• Macroscopic behaviors are governed by parameters like the magnetic Bond number.
• Applications include targeted hyperthermia, drug delivery, MRI contrast agents, extraction, power generation, heat transfer, and robotics.

Conclusions:

• Magnetic nanomaterials, ferrofluids, and ferrogels offer versatile applications.
• Material stability and understanding micro-macro correlations are key challenges.
• Further research is needed to optimize multifunctional magnetic materials.