The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA.
Adv Mater. 2013 Nov 26;25(44):6313-33. doi: 10.1002/adma.201302820. Epub 2013 Sep 12.
This article provides a progress report on the use of galvanic replacement for generating complex hollow nanostructures with tunable and well-controlled properties. We begin with a brief account of the mechanistic understanding of galvanic replacement, specifically focused on its ability to engineer the properties of metal nanostructures in terms of size, composition, structure, shape, and morphology. We then discuss a number of important concepts involved in galvanic replacement, including the facet selectivity involved in the dissolution and deposition of metals, the impacts of alloying and dealloying on the structure and morphology of the final products, and methods for promoting or preventing a galvanic replacement reaction. We also illustrate how the capability of galvanic replacement can be enhanced to fabricate nanomaterials with complex structures and/or compositions by coupling with other processes such as co-reduction and the Kirkendall effect. Finally, we highlight the use of such novel metal nanostructures fabricated via galvanic replacement for applications ranging from catalysis to plasmonics and biomedical research, and conclude with remarks on prospective future directions.
本文提供了使用电置换反应生成具有可调谐和良好控制性能的复杂中空纳米结构的进展报告。我们首先简要介绍了电置换反应的机理理解，特别关注其在金属纳米结构的尺寸、组成、结构、形状和形态方面的性能工程能力。然后，我们讨论了电置换反应中涉及的一些重要概念，包括金属溶解和沉积过程中的面选择性、合金化和脱合金化对最终产物结构和形态的影响，以及促进或阻止电置换反应的方法。我们还说明了如何通过与其他过程（如共还原和 Kirkendall 效应）耦合来增强电置换反应的能力，以制造具有复杂结构和/或组成的纳米材料。最后，我们强调了通过电置换反应制造的新型金属纳米结构在催化、等离子体和生物医学研究等领域的应用，并对未来的发展方向进行了展望。
