Megapixel multi-elemental imaging by Laser-Induced Breakdown Spectroscopy, a technology with considerable potential...

Area of Science:

• Geochemistry
• Analytical Chemistry
• Paleoclimatology

Background:

• Paleoclimate studies are vital for understanding climate dynamics and environmental changes.
• Current elemental analysis methods (e.g., μ-SRXRF, nano-SIMS, LA-ICP-MS) have limitations for large samples, including slow speeds and vacuum requirements.
• Analyzing large geological samples (>cm²) with high spatial resolution and sensitivity remains a significant challenge.

Purpose of the Study:

• To introduce a novel, fast, and sensitive imaging methodology for multi-elemental analysis of large geological samples.
• To overcome the limitations of existing techniques in terms of speed, sample size, and operational complexity.
• To enable high-resolution elemental mapping of geological materials for paleoclimate research.

Main Methods:

• Development of an imaging methodology based on laser-induced breakdown spectroscopy (LIBS).
• Implementation of fast multi-elemental scanning at speeds up to 100 Hz.
• Achieved lateral resolution up to 10 μm and parts-per-million (ppm) level sensitivity.

Main Results:

• Successfully generated the first megapixel elemental images of large geological samples.
• Demonstrated high performance in sensitivity (ppm-level), lateral resolution (10 μm), and operating speed (100 Hz).
• Acquired novel geochemical information inaccessible with conventional methods.

Conclusions:

• The proposed LIBS imaging methodology offers a significant advancement for analyzing large geological samples.
• This technique provides a new perspective for geochemical applications, particularly in paleoclimate research.
• The method overcomes previous constraints, enabling faster and more comprehensive elemental analysis.