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Co-mediated nucleation of erbium/silicon nanoclusters in fused silica

机译:熔融石英中/硅纳米团簇的共介导成核

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摘要

We investigate the structural evolution of Er/Si nanoclusters obtained in co-implanted fused silica upon annealing via Raman spectroscopy and transmission electron microscopy. The effect of annealing temperature (900-1200 ℃) on the nature and the relative fraction of the formed amorphous-Si, Si nanocrystals (Si-nc), and amorphous Er nanoparticles (Er-np) was determined in this ternary Er-Si-0 system, showing a change of growth regime above 1100 ℃ due to the formation of mixed Er/O/Si aggregates. We observe that the nucleation and growth of amorphous Er-np and Si-nc are mutually affected. The 2-fold increase in the size of Er-np when no excess Si~+ is present in the matrix indicates that the formation of Si-nc in the proximity of Er clusters hinders Er diffusivity above 1100 ℃. This finding shows the importance of nanoclustering for improving the thermal stability of Er-doped silica systems.
机译:我们调查了拉曼光谱和透射电子显微镜退火后共注入熔融石英中Er / Si纳米团簇的结构演变。在该三元Er-Si中测定了退火温度(900-1200℃)对所形成的非晶Si,Si纳米晶体(Si-nc)和非晶Er纳米颗粒(Er-np)的性质和相对分数的影响-0系统,由于混合的Er / O / Si聚集体的形成,在1100℃以上显示出生长方式的变化。我们观察到非晶Er-np和Si-nc的形核和生长相互影响。当基质中不存在过量的Si〜+时,Er-np的尺寸增加2倍,表明在1100℃以上Er团簇附近形成Si-nc阻碍了Er的扩散。该发现表明纳米簇对于改善掺Er的二氧化硅体系的热稳定性的重要性。

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  • 来源
    《Journal of Materials Research》 |2015年第20期|3003-3010|共8页
  • 作者单位

    Centre Energie Materiaux Telecommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada;

    Centre Energie Materiaux Telecommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada;

    Centre Energie Materiaux Telecommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada;

    Regroupement Quebecois sur les Materiaux de pointe, Departement de Physique, Universite de Montreal, Montreal, QC H3C 3J7, Canada;

    Regroupement Quebecois sur les Materiaux de pointe, Departement de Physique, Universite de Montreal, Montreal, QC H3C 3J7, Canada;

    Centre Energie Materiaux Telecommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada and Center for Self-Assembled Chemical Structures, McGill University, Montreal, QC, H3A 0B8, Canada;

  • 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
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