Melting of Zn nanoparticles embedded in SiO2 at high temperatures: Effects on surface plasmon resonances
Melting of Zn nanoparticles embedded in SiO2 at high temperatures: Effects on surface plasmon resonances
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DOI：
10.1063/1.3290984
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发表时间：
2010-01-11
影响因子：
4
通讯作者：
Kishimoto, N.
中科院分区：
文献类型：
--
作者：
Amekura, H.;Tanaka, M.;Kishimoto, N.
Zn纳米粒子在室温下在近红外和紫外区域有两个吸收峰，均满足表面等离子体共振（SPR）判据。根据高温下的X射线衍射，发现SiO2中的Zn纳米颗粒在360 - 420 ℃下熔化并在250 - 310 ℃下固化，具有大的温度滞后。虽然NIR峰随着熔融而消失，但UV峰显示出随着熔融的突然能量偏移，但甚至在熔融后仍然存在。第一原理能带计算归因于紫外和近红外峰SPR增强带间和带内跃迁，分别。
Zn nanoparticles at room temperature show two absorption peaks in the near-infrared (NIR) and the ultraviolet (UV) regions, both of which satisfy the criterion of surface plasmon resonance (SPR). From x-ray diffraction at high temperatures, it was found that the Zn nanoparticles in SiO2 melt at 360-420 degrees C and solidify at 250-310 degrees C with a large temperature hysteresis. While the NIR peak disappears with melting, the UV peak shows sudden energy shift with melting but survives even after the melting. The first-principle band calculation ascribes the UV and NIR peaks to SPR-enhanced inter- and intraband transitions, respectively.