Combined micro-Raman/UV-visible/fluorescence spectrometer for high-throughput analysis of microsamples

Area of Science:

• Analytical Chemistry
• Materials Science
• Spectroscopy

Background:

• High-throughput analysis is crucial for accelerating materials discovery and diagnostics.
• Existing spectroscopic methods often lack the speed and resolution for large-scale microsample screening.

Purpose of the Study:

• To develop a novel, integrated spectroscopy system for high-throughput analysis of microsamples.
• To demonstrate the system's capability in materials characterization and trace detection.

Main Methods:

• Development of a combined micro-Raman/UV-visible (vis)/fluorescence spectroscopy system.
• Utilizing a computer-controlled XY translation microstage for micron-precision mapping of over 10,000 microsamples.
• Employing a holographic Raman grating and liquid-nitrogen-cooled CCD detector to enhance signal-to-noise ratio.

Main Results:

• The system can analyze >10,000 microsamples (min. size 5 µm) in hours with micron precision.
• Achieved high spectral resolutions: ~2 cm⁻¹ (Raman), 0.4 nm (UV-vis), 0.1 nm (fluorescence).
• Successfully demonstrated high-throughput screening of a combinatorial ferroelectric library (BaTi(x)Zr(1-x)O(3)).

Conclusions:

• The developed combined spectroscopy system offers unprecedented speed and precision for microsample analysis.
• Enables structure analysis of diverse materials (ferroelectrics, catalysts, polymers, etc.) for novel material development.
• Facilitates ultrasensitive detection of trace pharmaceuticals and diagnostic agents.