Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries
Near-field scanning optical microscopy of ZnO nanopatterns fabricated by micromolding in capillaries
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DOI：
10.1063/1.1949712
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发表时间：
2005-07
影响因子：
3.2
通讯作者：
S. Donthu;Zixiao Pan;G. Shekhawat;V. Dravid;B. Balakrisnan;S. Tripathy
中科院分区：
文献类型：
--
作者：
S. Donthu;Zixiao Pan;G. Shekhawat;V. Dravid;B. Balakrisnan;S. Tripathy
用近场扫描光学显微镜(NSOM)研究了采用溶胶-凝胶法在毛细管内微模塑法制备的300 nm宽的氧化锌纳米颗粒。原子力显微镜和扫描电子显微镜表明，图案是连续的，线宽均匀。在NSOM扫描中同时采集的形貌和光学信号显示了纳米级的光致发光强度在氧化锌纳米管中的分布。在室温下，当用514.5 nm的Ar离子激光激发时，纳米尺度的光谱图谱显示出非常宽的缺陷诱导的绿-黄-红发光带。我们的分析表明，当工作在收集模式下时，利用非自组织光学显微镜可以获得光学分辨率为⩽300 nm的空间分辨的氧化锌发光特征，并强调了在相同尺度上将纳米尺度的物理特性与功能特性相结合的必要性。
We report near-field scanning optical microscopy (NSOM) studies of 300‐nm-wide ZnO nanopatterns fabricated by micromolding in capillary technique using a sol-gel route. Atomic force microscopy and scanning electron microscopy show that the patterns are continuous with uniform linewidths. Simultaneous topography and optical signal collected in NSOM scans exhibit nanoscale photoluminescence intensity distribution in the ZnO nanopatterns. The nanoscale spectral mapping shows very broad defect-induced green-yellow-red luminescence bands, at room temperature, when excited with a 514.5‐nm Ar-ion laser. Our analyses demonstrate that spatially resolved ZnO luminescence features with an optical resolution of ⩽300nm can be obtained with NSOM while operating in collection mode, and underscore the need to couple nanoscale physical characterization with functional properties at the same scale.