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Synthesis and optical characterization of single-crystalline AlN nanosheets

机译：单晶AlN纳米片的合成与光学表征

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摘要

Uniform and smooth AlN nanosheets were fabricated on Si substrates by a vapour-phase transport method, using Al powder and ammonia as the source materials. Their morphology and structure were examined by scanning and transmission electron microscopy, and X-ray diffraction. They have a perfect rectangular shape. The growth is favoured along the < 1100 > and < 0001 > crystallographic directions within the < 1120 > plane. Their growth mechanism is discussed on the basis of data gathered. The linewidth of E_2 (high) longitudinal optical phonon mode is about 7 cm~(-1),rnindicating their high quality. Their photoluminescence property is also investigated.
机译：以铝粉和氨为原料，通过气相转移法在硅基片上制备出均匀，光滑的AlN纳米片。通过扫描和透射电子显微镜以及X射线衍射检查了它们的形态和结构。它们具有完美的矩形形状。在<1120>平面内沿<1100>和<0001>晶体学方向的生长是有利的。在收集数据的基础上讨论了它们的增长机制。 E_2（高）纵向光学声子模式的线宽约为7 cm〜（-1），表明其高质量。还研究了它们的光致发光特性。

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