纳米间隙

Abstract(#br)We have successfully fabricated sub-100 nm nanogaps in Pd–Ni alloy thin films on an elastomeric substrate by simple stretching. The nanogaps-containing Pd–Ni films were utilized as hydrogen-sensing sponges and their performance was demonstrated to dominate over the performance of similar mobile thin films comprised of pure Pd in major aspects such as the response time, sensitivity in high H 2 concentrations, and H 2 detection limit.

In this paper, an optical pressure-sensitive membrane based on plasmon resonance absorption has been designed, fabricated, and demonstrated. The membrane utilizes plasmon resonance on a gold island film embedded in a polydimethylsiloxane (PDMS) layers, and the shift of the resonant wavelength was used as an indicator of pressure-induced strain of the membrane. The membrane with total thickness of 100 µm were prepared with spin-coating of PDMS and vacuum evaporation of gold island film with the nominal thickness of 10 nm.

本文设计、制备了一种基于等离子体共振吸收的光学压力敏感膜，并对其进行了表征。该膜利用聚二甲基硅氧烷( PDMS )层中的金岛膜上的等离激元共振，以共振波长的漂移作为膜的压力应变的指标。采用PDMS旋涂和真空蒸镀标称厚度为10 nm的金岛膜制备了总厚度为100 µ m的膜。通过吸光度谱的测量，验证了所制备膜的压敏性，当压力达到35 k Pa时，灵敏度达到最大值0.35 nm / k Pa。通过电磁仿真和膜拉伸试验的对比，分析了引起压力敏感性的等离子体共振模式。通过拉伸试验，得到了平行和垂直偏振方向的共振波长红移，灵敏度分别为0.372和0.134 nm / %。从电磁仿真结果来看，这些红移可以归因于金岛薄膜的带隙模式和形变模式共振。