期刊
CHEMISTRY OF MATERIALS
卷 21, 期 19, 页码 4366-4373出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm900210m
关键词
-
We report the synthesis of Mn-substituted titania nanosheets and the preparation of room-temperature ferromagnetic thin films via layer-by-layer assembly of these nanosheets. Ti(5.2-2x)/6Mnx/2O2 (x = 0.0-0.4) nanosheets were synthesized by delaminating layered titanates [K0.8Ti(5.2-2x)/3Li(0.8-x)/3-MnxO(4)], in which the Mn content was systematically controlled by Li+ doping. We found that Mn content in the host layers was preserved upon exfoliation, and controlled Mn doping was achieved in exfoliated Ti(5.2-2x)/6Mnx/2O2 (x = 0.0-0.4) nanosheets, where Li+ tons were completely extracted by acid-exchange reaction in the exfoliation process. The multilayer films of Ti(5.2-2x)/6Mnx/2O2 (x = 0.0-0.4) nanosheets exhibit a clear magnetic hysteresis loop at room-temperature in similar to what observed in ferromagnetic Ti1-xCoxO2 nanosheets. Electronic absorption, magnetic circular dichroism, and hard X-ray photoelectron spectroscopy were used to identify Mn-derived states, and analyze the properties of these states related to ferromagnetism. The first-principles calculation of Ti(5.2-2x)/6Mnx/2O2 was also employed to characterize the doping effect on electronic structures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据