Dark-field spectroscopy of plasmon-enhanced scattering and fluorescence from polymer-coated silver nanoparticles

• Keywords
• Plasmon biosensors
• Metal nanoparticles
• Localized surface plasmon resonance (LSPR)
• Dark-field microscopy
• Dark-field spectroscopy
• InFocus λ DS

In the R&D of plasmon biosensors utilizing metal nanoparticles, dark-field microscopy for nanostructure observation and spectroscopy for optical response investigation are indispensable. Here, we present an example of dark-field spectroscopic analysis focusing on surface plasmon-enhanced scattering and fluorescence from Ag nanoparticles, utilizing a dark-field spectroscopic imaging microscope.

Thermal conductivity measurement of amorphous Ge_1-xSn_x thin films using frequency-domain thermoreflectance

• Keywords
• Semiconductor
• Nanotechnology
• Frequency-domain thermoreflectance
• InFocus κ FDTR

The thermal conductivities of amorphous Ge_1-xSn_x thin films with different Sn compositions were measured using frequency-domain thermoreflectance (FDTR). The results show that the thermal conductivity of the thin films decreases from 0.50 W/mK to 0.44 W/mK with increasing Sn composition, consistent with the amorphous limit calculated by the minimum thermal conductivity model.