Department of Electrical Engineering and Bioscience, Waseda University, Shinjuku, Tokyo 169-8555, Japan.
Nanotechnology. 2009 Nov 25;20(47):475306. doi: 10.1088/0957-4484/20/47/475306. Epub 2009 Oct 29.
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.
采用选择离子种类及其能量的方法对石英玻璃进行了快重离子辐照，以诱导产生最大的损伤区域。然后，用氢氟酸蒸气对这些区域进行选择性刻蚀，在玻璃表面形成纳米孔。随后，通过真空蒸发将金纳米粒子嵌入纳米孔中，然后进行热处理。在通过这些步骤获得的新的等离子体结构中，当将水引入纳米孔中时，发现在金纳米粒子周围诱导的局域表面等离激元激发波长出现红移，这与理论计算吻合较好。这表明所制造的结构可用作传感元件，通过测量红移来检测诸如生物分子等物质对纳米粒子的附着。
