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中文摘要：
单纳米粒子的LSPR光学生物传感器具有空间分辨率高，可植人生物的细胞和组织里，检测所需要的剂量少等优势。本文提出一种十字星形的纳米粒子结构以进一步提高单纳米粒子LSPR光学生物传感器的信号强度。模拟和分析表明，十字星形纳米粒子的消光效率远远高于相同结构尺寸的菱形或三角形纳米粒子的消光效率，为发展新型结构单或阵列式的金属纳米粒子LSPR光学生物传感器提供了参考依据。
英文摘要：
Single-nanoparticle biosensors based on Localized Surface Plasmon Resonance（LSPR） offer improved absolute detection limits （total number of molecules detected） and also enable higher spatial resolution compare. In addition, single-nanoparticle biosensors have promising applications inside cells and tissues where fixed arrays are unable to penetrate. In the article we present a cross-shaped metal nanoparticle to improve the signal intensity of single-nanoparticle biosensors. The extinction properties of the cross-shaped metal nanoparticle with a variety of dimensions are researched. It is found that the extinction efficiency of the cross-shaped metal nanoparticle is higher than triangle and rhombus＇ in the same dimensions. The results improve the signal intensity of biosensors. At the same time, it is of value for the design of the single-nanoparticle or array nanoparticles biosensors.
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