Dual surface plasmon resonances in Zn nanoparticles in SiO2: an experimental study based on optical absorption and thermal stability
Dual surface plasmon resonances in Zn nanoparticles in SiO2: an experimental study based on optical absorption and thermal stability
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DOI：
10.1088/0957-4484/18/39/395707
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发表时间：
2007-10
期刊：
影响因子：
3.5
通讯作者：
H. Amekura;N. Umeda;K. Kono;Y. Takeda;N. Kishimoto;C. Buchal;S. Mantl
中科院分区：
文献类型：
--
作者：
H. Amekura;N. Umeda;K. Kono;Y. Takeda;N. Kishimoto;C. Buchal;S. Mantl
通过60 keV的Zn离子注入在石英玻璃（SiO2）中形成的直径为5-15 nm的金属锌纳米颗粒（NPs）在4.8 eV附近显示出强的紫外吸收峰，这被认为是Zn纳米颗粒的表面等离子体共振（SPR），以及在1.2 eV处的另一个小峰，这是以前从未报道过的。为了确定1.2eV峰的来源，在真空（纯热稳定性）和氧气（热氧化稳定性）中退火下评估两个峰和Zn NP之间的热稳定性的相关性。1.2eV峰、4.8eV峰和Zn NP之间的良好相关的稳定性表明，1.2eV峰不是归因于辐射诱导的缺陷，而是归因于Zn NP。1.2eV的峰可以归因于Zn NPs在SiO2中的SPR，因为该峰满足金属NPs的SPR的标准。由于4.8eV峰也预期满足标准，因此SiO2中的Zn NP在1.2和4.8eV处具有两个SPR。
Metallic zinc nanoparticles (NPs) of 5–15 nm in diameter, formed in silica glass (SiO2) by Zn ion implantation of 60 keV, showed a strong ultraviolet absorption peak at around 4.8 eV, which has been assigned as the surface plasmon resonance (SPR) of Zn NPs, and another small peak at 1.2 eV, which has never been reported before. To identify the origin of the 1.2 eV peak, the correlations of thermal stability between the two peaks and Zn NPs were evaluated under annealing both in a vacuum (pure thermal stability) and in oxygen gas (thermal oxidation stability). The well-correlated stability between the 1.2 eV peak, the 4.8 eV peak and Zn NPs indicates that the 1.2 eV peak is not ascribed to radiation-induced defects but to the Zn NPs. The 1.2 eV peak can be ascribed to an SPR of Zn NPs in SiO2, because the peak satisfies the criterion of the SPR of metallic NPs. Since the 4.8 eV peak is also expected to satisfy the criterion, Zn NPs in SiO2 have two SPRs at 1.2 and 4.8 eV.