Ferritin protein encapsulated photoluminescent rare earth nanoparticle
Ferritin protein encapsulated photoluminescent rare earth nanoparticle
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DOI：
10.1063/1.4816567
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发表时间：
2013-07
影响因子：
3.2
通讯作者：
T. Harada;H. Yoshimura
中科院分区：
文献类型：
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作者：
T. Harada;H. Yoshimura
在脱铁铁蛋白腔中合成稀土（钇（Y）、铕（Eu）和铽（Tb））纳米颗粒以及Eu和Tb掺杂的Y纳米颗粒。它们在pH 8.5的水溶液中表现出窄的尺寸分布和高稳定性。Eu和Eu掺杂的Y（Y：Eu）纳米颗粒表现出红色光致发光（发射峰：590和614 nm），而Tb和Tb掺杂的Y（Y：Tb）纳米颗粒表现出绿色光致发光（发射峰：488、544、582和618 nm）。高分辨率电子显微镜观察显示，约5%的纳米粒子具有晶格结构，而其余的纳米粒子是无定形的。Y纳米颗粒的电子衍射给出了对应于氧化钇（Y2O3）的立方结构的晶格间距。Y：Eu和Y：Tb纳米颗粒在脱铁蛋白腔中发光的最佳掺杂剂含量分别约为60%和40%。
Rare earth (yttrium (Y), europium (Eu), and terbium (Tb)) nanoparticles and Eu and Tb doped Y nanoparticles are synthesized in an apoferritin cavity. They exhibit a narrow size distribution and a high stability in an aqueous solution at pH 8.5. Eu and Eu doped Y (Y:Eu) nanoparticles exhibit red photoluminescence (emission peaks: 590 and 614 nm), while Tb and Tb doped Y (Y:Tb) nanoparticles exhibit green photoluminescence (emission peaks: 488, 544, 582, and 618 nm). High-resolution electron microscopy observations reveal that about 5% of the nanoparticles have a lattice structure, while the remaining nanoparticles are amorphous. Electron diffraction of the Y nanoparticles gives lattice spacings corresponding to the cubic structure of yttrium oxide (Y2O3). The most optimal dopant content for luminescence of Y:Eu and Y:Tb nanoparticles in apoferritin cavity are about 60% and 40%, respectively.