提出了一种基于金属纳米结构局域表面等离子体共振光谱的有机气体的传感方法.通过时域有限差分法设计了一种具有较高折射率灵敏度的三角形纳米柱阵列，并利用纳米球光刻法进行了制作.对乙醇蒸汽的传感实验结果证明，所制作的三角形银纳米柱对乙醇分子浓度非常敏感，其探测灵敏度达到24ppm/nm.该金属纳米结构传感有机气体的方法有望应用于环境监测等方面.

A metal nanostructure sensing method for monitoring organic vapors is presented. A kind of triangular silver nanoprisms array with relatively high refractive index sensitivity is designed and analysed by finite difference time domain numerical method, and it is fabricated through nanosphere lithography fabrication method. Experiment results show that the fabricated nanostructures array is so sensitive to ethanol molecules that the detecting sensitivity reaches as high as 24ppm/nm. This organic vapor sensing method is expected to have a great potential in environmental monitoring.