Design and perspective of amorphous metal nanoparticles from laser synthesis and processing

Area of Science:

• Materials Science
• Nanotechnology
• Physical Chemistry

Background:

• Amorphous metal nanoparticles (A-NPs) offer enhanced properties due to structural disorder and nanoscaling.
• Conventional synthesis methods for A-NPs often lead to contamination and size limitations.
• Laser-based methods like laser ablation in liquid (LAL) and laser fragmentation in liquid (LFL) are emerging as scalable, green synthesis routes.

Purpose of the Study:

• To review amorphous metal oxide and carbide nanoparticles produced by LAL and LFL.
• To elucidate the formation mechanisms and critical parameters influencing amorphization versus crystallization.
• To explore the potential of laser-generated metallic glass nanoparticles (MG-NPs) and applications of A-NPs.

Main Methods:

• Review of existing literature on LAL and LFL synthesis of amorphous metal nanoparticles.
• Analysis of factors influencing amorphization, including liquid medium, target materials, and laser parameters.
• Discussion of potential mechanisms governing the formation of amorphous structures.

Main Results:

• LAL and LFL show promise for producing ultrapure A-NPs, overcoming limitations of conventional methods.
• Key parameters (liquid, target, laser settings) significantly impact the balance between amorphization and crystallization.
• The review identifies critical factors for controlling A-NP formation and suggests pathways for MG-NP synthesis.

Conclusions:

• Laser-based synthesis offers a scalable and green approach for producing A-NPs with tunable properties.
• Understanding the formation mechanisms is crucial for optimizing synthesis and designing A-NPs for specific applications.
• Further research into laser-generated MG-NPs and their applications in fields like catalysis and magnetism is warranted.