Electron Enrichment in 3d Transition Metal Oxide Hetero-Nanostructures
學年 99
學期 1
出版(發表)日期 2011-01-01
作品名稱 Electron Enrichment in 3d Transition Metal Oxide Hetero-Nanostructures
著者 Kronawitter, Coleman X.; Bakke, Jonathan R.; Wheeler, Damon A.; Wang, Wei-Cheng; Chang, Chinglin; Antoun, Bonnie R.; Zhang, Jin Z.; Guo, Jinghua; Bent, Stacey F.; Mao, Samuel S.; Vayssieres, Lionel
單位 淡江大學物理學系
出版者 Washington, DC: American Chemical Society
著錄名稱、卷期、頁數 Nano Letters 11 (9), pp3855-3861
摘要 Direct experimental observation of spontaneous electron enrichment of metal d orbitals in a new transition metal oxide heterostructure with nanoscale dimensionality is reported. Aqueous chemical synthesis and vapor phase deposition are combined to fabricate oriented arrays of high-interfacial-area hetero-nanostructures comprised of titanium oxide and iron oxide nanomaterials. Synchrotron-based soft X-ray spectroscopy techniques with high spectral resolution are utilized to directly probe the titanium and oxygen orbital character of the interfacial region’s occupied and unoccupied densities of states. These data demonstrate the interface to possess electrons in Ti 3d bands and an emergent degree of orbital hybridization that is absent in parent oxide reference crystals. The carrier dynamics of the hetero-nanostructures are studied by ultrafast transient absorption spectroscopy, which reveals the presence of a dense manifold of states, the relaxations from which exhibit multiple exponential decays whose magnitudes depend on their energetic positions within the electronic structure.
關鍵字 Carrier dynamics; electronic structure; interfacial charge transfer; nanostructure; oxide heterostructure
語言 en
ISSN 1530-6984; 1530-6992
期刊性質 國外
收錄於 SCI
通訊作者 Mao, Samuel S.; Vayssieres, Lionel
國別 USA
出版型式 紙本

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/88836 )