TY: JOUR T1 - Galvanic Replacement Reactions in Metal Oxide Nanocrystals A1 - Oh, Myoung Hwan A1 - Yu, Taekyung A1 - Yu, Seung-Ho A1 - Lim, Byungkwon A1 - Ko, Kyung-Tae A1 - Willinger, Marc-Georg A1 - Seo, Dong-Hwa A1 - Kim, Byung Hyo A1 - Cho, Min Gee A1 - Park, Jae-Hoon A1 - Kang, Kisuk A1 - Sung, Yung-Eun A1 - Pinna, Nicola A1 - Hyeon, Taeghwan N2 - Galvanic replacement reactions provide a simple and versatile route for producing hollow nanostructures with controllable pore structures and compositions. However, these reactions have previously been limited to the chemical transformation of metallic nanostructures. We demonstrated galvanic replacement reactions in metal oxide nanocrystats as well. When manganese oxide (Mn3O4) nanocrystals were reacted with iron(II) perchlorate, hollow box-shaped nanocrystats of Mn3O4/gamma-Fe2O3 ("nanoboxes") were produced. These nanoboxes ultimately transformed into hollow cagetike nanocrystats of gamma-Fe2O3 ("nanocages"). Because of their nonequihbrium compositions and hollow structures, these nanoboxes and nanocages exhibited good performance as anode materials for lithium ion batteries. The generality of this approach was demonstrated with other metal pairs, including Co3O4/SnO2 and Mn3O4/SnO2. UR - https://ria.ua.pt/handle/10773/20381 Y1 - 2013 PB - AMER ASSOC ADVANCEMENT SCIENCE