Surface Plasmon Spectral Fingerprinting of Adsorbed Magnesium Phthalocyanine by Angle and Wavelength Modulation
Surface Plasmon Spectral Fingerprinting of Adsorbed Magnesium Phthalocyanine by Angle and Wavelength Modulation
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DOI：
10.1366/000370204322729414
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发表时间：
2004-01
影响因子：
3.5
通讯作者：
Mehrdad Zangeneh;N. Doan;E. Sambriski;R. Terrill
中科院分区：
文献类型：
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作者：
Mehrdad Zangeneh;N. Doan;E. Sambriski;R. Terrill
将一种新的角度和波长调制表面等离子体共振（SPR）光谱仪器方法应用于SPR实验中的光谱选择性问题。对于透明分析物，SPR反射率数据被简化为共振波长与入射角λSPR（θ）的二维（2D）光谱。该光谱编码了分析物的折射率（RI）色散，并说明了在较长波长（较低角度）下每单位RI变化的SPR光谱位移的增加。对于吸收分析物酞菁镁（MgPc），由于SPR和MgPc的光谱峰混合，使得二维数据约简方法变得复杂。菲涅尔反射率模型以分支光谱的形式支持光谱分支和定性指纹的实验观测，并给出了差分反射率ΔR（λ, θ）等值线图。
A novel instrumental method for angle and wavelength modulated surface plasmon resonance (SPR) spectroscopy is applied to the problem of spectral selectivity in SPR experiments. For transparent analytes, SPR reflectivity data are reduced to a two-dimensional (2D) spectrum of resonance wavelength versus incident angle, λSPR(θ). This spectrum encodes the refractive index (RI) dispersion of the analyte and illustrates the increased SPR spectral shift per unit RI change at longer wavelengths (lower angle). For the absorbing analyte magnesium phthalocyanine (MgPc), the 2D data reduction method is complicated by the way the SPR and MgPc-based spectral peaks mix. Fresnel reflectivity models support experimental observations of spectral branching and qualitative fingerprints in the form of branched spectra, and difference reflectivity ΔR(λ, θ) contour plots are presented.