Solution-Based Straight and Branched CdSe Nanowires
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- 作者：James W. Grebinski ; Katherine L. Hull ; Jing Zhang ; Thomas H. Kosel ; and Masaru Kuno
- 刊名：Chemistry of Materials
- 出版年：2004
- 出版时间：December 14, 2004
- 年：2004
- 卷：16
- 期：25
- 页码：5260 - 5272
- 全文大小：956K
- 年卷期：v.16,no.25(December 14, 2004)
- ISSN：1520-5002
文摘
Confined straight and branched CdSe nanowires (NWs) are synthesized using a solution-based approach which leverages advances in the synthesis of colloidal CdSe quantum dots(QDs) with incipient approaches for the seeded (solution) synthesis of semiconductor NWs.The resulting straight and branched NWs have typical diameters below 10 nm withaccompanying lengths between 1 and 10 
m. In the case of branched NWs, tripod, v-shaped,and y-shaped morphologies are observed. Variations in this preparation lead to higher orderstructures with multiple arms. The branching transition is discussed, and a possiblemechanism based upon geminate NW nucleation is proposed. Such solution-grown straight,branched, and higher-order NWs exhibit potentially interesting optical, electrical, andtransport properties due to their narrow radii below the corresponding bulk exciton Bohrradius of CdSe. Furthermore, this transition from straight to branched morphologies opensup avenues for investigating not only size- but also shape-dependent optical/electricalproperties of one-dimensional (1D) and quasi-1D materials.
m. In the case of branched NWs, tripod, v-shaped,and y-shaped morphologies are observed. Variations in this preparation lead to higher orderstructures with multiple arms. The branching transition is discussed, and a possiblemechanism based upon geminate NW nucleation is proposed. Such solution-grown straight,branched, and higher-order NWs exhibit potentially interesting optical, electrical, andtransport properties due to their narrow radii below the corresponding bulk exciton Bohrradius of CdSe. Furthermore, this transition from straight to branched morphologies opensup avenues for investigating not only size- but also shape-dependent optical/electricalproperties of one-dimensional (1D) and quasi-1D materials.