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首页> 外文期刊>Materials Chemistry and Physics >Structural rearrangement at the yttrium-depleted surface of HCl-processed yttrium aluminosilicate glass for ~(90)Y-microsphere brachytherapy
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Structural rearrangement at the yttrium-depleted surface of HCl-processed yttrium aluminosilicate glass for ~(90)Y-microsphere brachytherapy

机译：盐酸处理的钇铝硅酸盐玻璃的钇耗尽表面上的结构重排，用于〜（90）Y-微球近距离放射治疗

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摘要

The design of a process to create yttrium aluminosilicate microspheres with a core-shell structure is of interest in the field of cancer brachytherapy. Glass microspheres with yttrium-depleted shell may indeed reduce the risk of ~(90)Y release into the organism. Here we show - by means of confocal micro-Raman scattering, microfluorescence, X-ray-fluorescence analysis, and 1R spectroscopy - that yttrium depletion may be achieved by etching in HC1 solution (pH 2) at a rate of 1 μm day~(-1) in bulk glass and 3 μm day~(-1) in glass microsphere (35 μm of diameter). Importantly, the spectroscopic results - collected in confocal configuration along the processed layer - indicate a high degree of structural reconstruction of the glass network, with the formation of an interconnected silicate-rich glass that surrounds a core of unmodified yttrium aluminosilicate. We also demonstrate that the process is driven by non-bridging oxygen sites, which regulate the hydroxylation and structural reconstruction of the glass within the Y-depleted layer. The analysis gives also some insight into open fundamental questions about the short-range structure and the chemical stability of this kind of glass, which is also important in photonics and nuclear waste disposal.
机译：制备具有核-壳结构的钇铝硅酸钇微球的方法的设计在癌症近距离放射治疗领域中是令人感兴趣的。带有钇耗尽壳的玻璃微球确实可以降低〜（90）Y释放到生物体中的风险。在这里，我们证明了-通过共焦微拉曼散射，微荧光，X射线荧光分析和1R光谱-可以通过在HCl溶液（pH 2）中以1μm天的速率蚀刻来实现钇耗竭〜（ -1）在散装玻璃中，每天3μm〜（-1）在玻璃微球体中（直径35μm）。重要的是，沿加工层以共焦构型收集的光谱结果表明，玻璃网络的高度结构重建，形成了相互连接的富含硅酸盐的玻璃，该玻璃围绕着未改性的钇铝硅酸钇的核。我们还证明了该过程是由非桥接氧位点驱动的，它调节了Y耗尽层中玻璃的羟基化和结构重建。该分析还对此类玻璃的短程结构和化学稳定性等未解决的基本问题提供了一些见解，这在光子学和核废料处理中也很重要。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|24-28|共5页
  • 作者

    V.N. Sigaev; G.N. Atroschenko; V.I. Savinkov; P.D. Sarkisov; G. Babajew; K. Lingel; R. Lorenzi; A. Paleari;

  • 作者单位

    Mendeleev University of Chemical Technology of Russia. Miusskaya Square 9, 125190 Moscow, Russia;

    Mendeleev University of Chemical Technology of Russia. Miusskaya Square 9, 125190 Moscow, Russia;

    Mendeleev University of Chemical Technology of Russia. Miusskaya Square 9, 125190 Moscow, Russia;

    Mendeleev University of Chemical Technology of Russia. Miusskaya Square 9, 125190 Moscow, Russia;

    Lingel Fenster GmbH & Co.KG, Pfahlheimerstrasse 7, 73479 Ellwangen-Rohlingen, Germany;

    Lingel Fenster GmbH & Co.KG, Pfahlheimerstrasse 7, 73479 Ellwangen-Rohlingen, Germany;

    Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 53,1-20125 Milano, Italy;

    Mendeleev University of Chemical Technology of Russia. Miusskaya Square 9, 125190 Moscow, Russia,Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 53,1-20125 Milano, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    glasses; etching; raman spectroscopy and scattering; photoluminescence spectroscopy;

    机译：眼镜;蚀刻拉曼光谱和散射光致发光光谱;

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