Navigating the Landscape of Dry Assembling Ordered Particle Structures: Can Solvents Become Obsolete?

Area of Science:

• Materials Science
• Nanotechnology
• Surface Chemistry

Background:

• Micro- and nanoparticle assembly is crucial for engineering larger structures, with a focus on wet methods.
• Wet assembly techniques often face limitations in versatility and scalability.
• Solvent-free dry assembly strategies offer a promising alternative to overcome these challenges.

Purpose of the Study:

• To review recent advancements in dry assembly methods for creating ordered particle arrays.
• To elucidate the fundamental surface interactions governing dry assembly processes.
• To highlight strategies for manipulating these interactions to achieve controlled assembly.

Main Methods:

• Review of literature on dry assembly techniques for micro- and nanoparticles.
• Elaboration on surface interactions: van der Waals, contact mechanics, capillary, and electrostatics.
• Discussion of force-based strategies (mechanical, electrical, laser-induced) and templating for particle manipulation.

Main Results:

• Summarizes progress in solvent-free, highly ordered particle array fabrication.
• Details the critical role of understanding and balancing surface interactions.
• Presents examples of utilizing dry-assembled structures and their applications.

Conclusions:

• Dry assembly offers a sustainable and scalable alternative to wet methods for particle assembly.
• Further research into the physical phenomena of dry assembly is needed.
• This review serves as a resource to inspire broader exploration of dry assembly techniques.