Large-area topography analysis and near-field Raman

We present a method for combined far-field Raman imaging,
topography analysis and near-field spectroscopy. Surfaceenhanced
Raman spectra of Rhodamine 6G (R6G) deposited
on silver nanoparticles were recorded using a bent fibre
aperture-type near-field scanning optical microscope (NSOM)
operated in illumination mode. Special measures were taken
to enable optical normal-force detection for control of the
tipsample distance. Comparisons between far-field Raman
images of R6G-covered Ag particle aggregates with topographic
images recorded using atomic force microscopy (AFM)
indicate saturation effects due to resonance excitation. Nanonics近场扫描光学电镜与Renishaw激光微拉曼光谱连用