多通道局域表面等离子体共振分析装置构建及实验研究 
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Construction and Experimental Study of a Multi-Channel Localized Surface Plasmon Resonance Analysis Device
1 河南农业大学机电工程学院, 河南 郑州 450002
2 河南农业大学理学院, 河南 郑州 450002
3 郑州轻工业学院材料与化学工程学院, 河南 郑州 450001
图 & 表
图 1. (a)多通道精确定位LSPR实验装置示意图;(b)多通道精确定位机构
Fig. 1. (a) Schematic of multi-channel precision alignment LSPR experimental setup; (b) multi-channel precision alignment system
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图 2. 粒径为13.5 nm的AuNPs在微孔板相应位置的吸光度分布
Fig. 2. Absorbance distribution of AuNPs with diameter of 13.5 nm at the corresponding positions of microplates
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图 3. 水介质环境下不同粒径AuNPs的消光光谱以及粒径与LSPR峰值波长之间的关系。(a)消光光谱;(b)关系
Fig. 3. Extinction spectra of AuNPs with different diameters and the relationship between LSPR peak wavelength and the diameter of AuNPs in water medium. (a) Extinction spectra; (b) relationship
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图 4. 质量分数为5.6%的葡萄糖介质环境下不同粒径AuNPs的消光光谱及粒径与LSPR峰值波长之间的关系。(a)消光光谱;(b)关系
Fig. 4. Extinction spectra of AuNPs with different diameters and the relationship between LSPR peak wavelength and the diameter of AuNPs in glucose solution medium with mass fraction of 5.6%. (a) Extinction spectra; (b) relationship
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图 5. AuNPs的LSPR峰值波长与环境折射率之间的关系
Fig. 5. Relation between AuNPs LSPR peak wavelength and environmental refractive index
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表 1合成AuNPs所需的试剂及AuNPs的直径
Table1. Reagents required for AuNPs synthesis and the diameter of AuNPs
| Amount of 1% sodium citrate /mL | Amount of 1 mmol/L HAuC/mL | Molar ratio of sodium citrate to HAuCl4 | Diameter of prepared AuNPs /nm |
|---|
| 2.50 | 25 | 3.87∶1 | 13.5 | | 1.28 | 25 | 1.98∶1 | 25.5 | | 0.85 | 25 | 1.32∶1 | 41.0 |
|
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表 2水介质环境下不同粒径AuNPs消光光谱的拟合系数
Table2. Fitting coefficient for different sizes of AuNPs in water medium
| D /nm | p1 | p2 | p3 | p4 | p5 | Adjusted R2 |
|---|
| 5.0 | 3.320×10-8 | -6.920×10-5 | 0.05464 | -18.97 | 2463 | 0.9997 | | 13.5 | 6.758×10-8 | -14.140×10-5 | 0.11050 | -38.28 | 4956 | 0.9976 | | 25.5 | 4.436×10-8 | -9.405×10-5 | 0.07451 | -26.14 | 3430 | 0.9990 | | 41.0 | 5.004×10-8 | -10.650×10-5 | 0.08466 | -29.82 | 3925 | 0.9979 |
|
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表 3质量分数为5.6%的葡萄糖介质环境下不同粒径AuNPs消光光谱的拟合系数
Table3. Fitting coefficient for different sizes of AuNPs in glucose solution medium with mass fraction of 5.6%
| D /nm | p1 | p2 | p3 | p4 | p5 | Adjusted R2 |
|---|
| 5.0 | 3.324×10-8 | -6.77×10-5 | 0.05314 | -18.47 | 2401 | 0.9997 | | 13.5 | 8.093×10-8 | -16.94×10-5 | 0.13250 | -45.93 | 5951 | 0.9964 | | 25.5 | 4.844×10-8 | -10.27×10-5 | 0.08133 | -28.54 | 3743 | 0.9987 | | 41.0 | 5.396×10-8 | -11.49×10-5 | 0.09138 | -32.19 | 4240 | 0.9985 |
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表 4粒径为25.5 nm的AuNPs在不同折射率下消光光谱的拟合系数
Table4. Fitting coefficient for AuNPs with diameter of 25.5 nm under different refractive index conditions
| nr | p1 | p2 | p3 | p4 | p5 | Adjusted R2 |
|---|
| 1.3305 | 4.436×10-8 | -9.41×10-5 | 0.07451 | -26.14 | 3430 | 0.9990 | | 1.3490 | 5.097×10-8 | -10.80×10-5 | 0.08555 | -30.01 | 3935 | 0.9989 | | 1.3655 | 5.301×10-8 | -11.24×10-5 | 0.08910 | -31.28 | 4105 | 0.9989 | | 1.3735 | 5.924×10-8 | -12.56×10-5 | 0.09957 | -34.95 | 4586 | 0.9986 |
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表 5粒径为41.0 nm AuNPs在不同折射率下消光光谱的拟合系数
Table5. Fitting coefficient for AuNPs with diameter of 41.0 nm under different refractive index conditions
| nr | p1 | p2 | p3 | p4 | p5 | Adjusted R2 |
|---|
| 1.3305 | 5.004×10-8 | -10.65×10-5 | 0.08466 | -29.82 | 3925 | 0.9979 | | 1.3490 | 5.150×10-8 | -10.97×10-5 | 0.08733 | -30.79 | 4058 | 0.9982 | | 1.3655 | 5.657×10-8 | -12.05×10-5 | 0.09599 | -33.86 | 4465 | 0.9980 | | 1.3735 | 5.872×10-8 | -12.52×10-5 | 0.09976 | -35.21 | 4645 | 0.9986 |
|
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王顺, 张浩, 李伟, 李世欣, 赵建波, 郭清乾, 王玲, 商俊娟, 李鑫, 胡建东. 多通道局域表面等离子体共振分析装置构建及实验研究[J]. 光学学报, 2019, 39(2): 0228002. Shun Wang, Hao Zhang, Wei Li, Shixin Li, Jianbo Zhao, Qingqian Guo, Ling Wang, Junjuan Shang, Xin Li, Jiandong Hu. Construction and Experimental Study of a Multi-Channel Localized Surface Plasmon Resonance Analysis Device[J]. Acta Optica Sinica, 2019, 39(2): 0228002.
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