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Published on: February 4, 2021
Progress of nanocrystalline growth kinetics based on oriented attachment
Jing Zhang1, Feng Huang, Zhang Lin
1Key Laboratory of Optoelectronic Materials Chemistry and Physics, State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, People's Republic of China.
Nanoscale
|July 22, 2010
Summary
Oriented attachment (OA) is a key mechanism in nanocrystal growth, distinct from Ostwald ripening (OR). This review details OA kinetics and models, offering insights for controlling nanomaterial size and shape.
Area of Science:
- Materials Science
- Nanotechnology
- Crystallography
Background:
- Crystal growth mechanisms, including Ostwald ripening (OR) and oriented attachment (OA), are crucial for tailoring nanomaterial properties.
- While OA is recognized for its role in nanocrystal self-assembly, a comprehensive understanding of its kinetics and underlying mechanisms remains limited.
- Existing research often focuses on OA's role rather than a deep mechanistic and kinetic investigation.
Purpose of the Study:
- To review the progress and impact of the oriented attachment (OA) mechanism in materials science.
- To highlight OA-based growth kinetics for a deeper understanding of nanocrystal formation.
- To explore methods for isolating and studying the OA mechanism, distinct from OR.
Main Methods:
- Literature review of oriented attachment (OA) in nanocrystal growth.
- Analysis of strategies to suppress Ostwald ripening (OR), such as strong surface adsorption.
- Summarization of nanocrystal growth kinetics influenced by surface adsorption.
- Generalization of developed OA kinetic models, including "molecular-like" models.
Main Results:
- Oriented attachment (OA) is a significant mechanism in nanocrystal growth, differing from classical Ostwald ripening (OR).
- Strong surface adsorption effectively suppresses OR, enabling the study of exclusive OA growth stages.
- Development of "molecular-like" kinetic models provides a framework for understanding OA as a collision and reaction process.
- Kinetic models for OA offer guidance for controlling nanostructural material size and shape.
Conclusions:
- A thorough understanding of OA growth kinetics is essential for advancing materials science.
- The developed kinetic models and insights into OA provide a foundation for precise control over nanomaterial morphology and size distribution.
- Further research into OA kinetics will facilitate the rational design and synthesis of advanced nanostructural materials.
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