Plasmonic activity on gold nanoparticles embedded innanopores formed in a surface layer ofsilica glass by swift-heavy-ionirradiation
Plasmonic activity on gold nanoparticles embedded innanopores formed in a surface layer ofsilica glass by swift-heavy-ionirradiation
复制标题
快重离子辐照在石英玻璃表面层形成的嵌入纳米孔的金纳米粒子的等离子体活性
DOI：
10.1088/0957-4484/20/47/475306
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发表时间：
2009
期刊：
影响因子：
3.5
通讯作者：
T. Komatsubara
中科院分区：
文献类型：
--
作者：
K. Nomura;Y. Ohki;M. Fujimaki;X. Wang;K. Awazu;T. Komatsubara
采用快重离子辐照石英玻璃，通过选择离子种类和能量，使其产生最大的损伤区域。这些区域然后被氢氟酸蒸气选择性地蚀刻以在玻璃表面上形成纳米孔。随后，通过真空蒸发将金纳米颗粒嵌入纳米孔中，然后进行热处理。在这些程序获得的新的等离子体结构中，发现在金纳米颗粒周围诱导的局部表面等离子体激发波长显示出红移，这与理论计算吻合得很好，当水被引入到纳米孔中时。这表明所制造的结构可以用作传感元件，以通过测量红移来检测诸如生物分子的物质对纳米颗粒的粘附。
Silica glass was irradiated by swift heavy ions by selecting the ion species and its energy in order to induce the largest damaged regions. These regions were then selectively etched by hydrofluoric acid vapour to form nanopores on the glass surface. Subsequently, gold nanoparticles were embedded into the nanopores by vacuum evaporation, followed by thermal treatment. In the new plasmonic structure obtained with these procedures, the localized surface plasmon excitation wavelength induced around the gold nanoparticles was found to show a redshift, which agreed well with the theoretical calculation, when water was introduced into the nanopores. This indicates that the fabricated structure can be used as a sensing element to detect the adhesion of substances such as biomolecules to the nanoparticles by measuring the redshift.