Distance-dependent Signal Enhancement of Gold Nanoparticles in the Surface Plasmon Resonance Based Bio-sensing

摘要：

It is well known that gold nanoparticles have a strong enhancement in the surface Plasmon resonance based on bio-sensing system due to the coupling between LSPR and SPR. However the size and mass effects of the gold nanoparticles themselves also change the surrounding refractive index, which in turn tune the signal. But less effort have been put in to separate these two factors. In this work, we studied the signal enhancement of gold nanoparticles of coupling effect. The gold nanoparticles were assembled on the planar gold surface through layer by layer deposit method. The experiment showed a strong distance dependent coupling. For the diameter of 20 nm gold nanoparticles, the coupling occurred within 4 nm.

作者: Xin Hong Zurong Qiu

作者单位: National Key Lab of Precision Measurement and Instrument,College of Precision Instrument And Opto-electronics Engineering, Tianjin University, Tianjin,China

会议类型: 国际会议

会议名称: International Conference on Micro/Nano Optical Engineering (纳米光学工程国际会议 ICOME 2011)

会议地点: 长春

会议语种:英文

页码: 158-159

在线出版日期: 2011-06-12（万方平台首次上网日期，不代表论文的发表时间）