A team of South Korean researchers has developed a revolutionary model that challenges long-standing theories on nanoparticle formation, growth, and shrinkage. Led by Professor Jaeyoung Sung from Chung-Ang University, the study introduces a new framework that could significantly impact fields such as electronics and medicine.
Nanoparticles are crucial in modern technology, from displays and catalysts to drug delivery systems. Their properties depend on their size and shape, yet the mechanisms behind their uniform growth have been elusive. Traditional models like the Gibbs-Thomson equation and classical nucleation theory have been insufficient in explaining why nanoparticles stabilize at specific sizes.
The research, co-conducted with Seoul National University and the IBS Center for Nanoparticle Research, presents a theory highlighting the complex dynamics of nanoparticle growth. Using liquid-phase transmission electron microscopy, the team observed nanoparticles in real time, discovering that growth occurs in distinct phases. This finding challenges the Ostwald ripening model, revealing that smaller particles can grow while larger ones dissolve.
The new theory considers factors such as particle energy, shape, molecular diffusion, and surface interactions, providing a comprehensive explanation that aligns with experimental data across various materials. This advancement could influence the design of nanoparticles for semiconductor fabrication, energy storage, and medical applications, offering a new direction for research in the field.
This breakthrough not only advances the understanding of nanoparticle physics and chemistry but also has potential implications in biology, particularly in understanding processes related to neurodegenerative diseases. The research marks a significant shift in the study of nanoparticle growth, promising to guide future innovations.
