Visualization of subsurface nanoparticles in a polymer matrix using resonance tracking atomic force acoustic microscopy and contact resonance spectroscopy
Visualization of subsurface nanoparticles in a polymer matrix using resonance tracking atomic force acoustic microscopy and contact resonance spectroscopy
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DOI：
10.1088/0957-4484/27/41/415707
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发表时间：
2016-09
期刊：
影响因子：
3.5
通讯作者：
K. Kimura;K. Kobayashi;Atsushi Yao;H. Yamada
中科院分区：
文献类型：
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作者：
K. Kimura;K. Kobayashi;Atsushi Yao;H. Yamada
强烈需要具有纳米级空间分辨率的地下特征可视化技术。一些研究小组已经展示了使用基于原子力显微镜的各种技术的表面下特征的可视化。然而，成像机制尚未完全理解。在这项研究中，我们使用两种技术展示了埋藏在距离表面900 nm的聚合物基质中的次表面Au纳米颗粒的可视化;即，共振跟踪原子力声学显微镜和接触共振光谱。结果表明，这两种技术都能将表面下的特征可视化为具有较高接触共振频率和较高Q值的区域，这表明这种可视化是通过埋入纳米颗粒的存在改变聚合物基体的接触刚度和阻尼来实现的。
A visualization technique of subsurface features with a nanometer-scale spatial resolution is strongly demanded. Some research groups have demonstrated the visualization of subsurface features using various techniques based on atomic force microscopy. However, the imaging mechanisms have not yet been fully understood. In this study, we demonstrated the visualization of subsurface Au nanoparticles buried in a polymer matrix 900 nm from the surface using two techniques; i.e., resonance tracking atomic force acoustic microscopy and contact resonance spectroscopy. It was clarified that the subsurface features were visualized by the two techniques as the area with a higher contact resonance frequency and a higher Q-factor than those in the surrounding area, which suggests that the visualization is realized by the variation of the contact stiffness and damping of the polymer matrix due to the existence of the buried nanoparticles.