Combined phase-sensitive acoustic microscopy and confocal laser scanning microscopy

Area of Science:

• Advanced microscopy techniques
• Materials science
• Cell biology

Background:

• Confocal laser scanning microscopy (CLSM) provides optical topographic contrast.
• Phase-sensitive acoustic microscopy (PSAM) offers complementary material property information.
• Integrating optical and acoustic methods can enhance sample characterization.

Purpose of the Study:

• To implement and evaluate combined PSAM and CLSM.
• To explore contrast mechanisms of the dual-modality technique.
• To assess its applicability to polymer films and biological cells.

Main Methods:

• Implementation of 1.2 GHz PSAM integrated with CLSM (reflection and fluorescence).
• Application to polymer blend films and fluorescently labeled fibroblasts and neuronal cells.
• Analysis of topographic and material contrast generation.

Main Results:

• High-precision topographic contrast obtained from acoustic phase images.
• Material contrast derived from acoustic amplitude V(z) curves.
• Optical and acoustic images of biological cells revealed distinct, complementary features.

Conclusions:

• Combined PSAM and CLSM is a powerful technique for detailed sample analysis.
• The method provides superior topographic precision and material contrast.
• Dual-modality imaging offers unique insights into both material and biological samples.