Total Internal Reflection Absorption Spectroscopy (TIRAS) for the Detection of Solvated Electrons at a Plasma-liquid Interface

作者： Hernan E. Delgado1, Paul Rumbach2, David M. Bartels3, David B. Go1,2 1Department of Chemical and Biomolecular Engineering,University of Notre Dame, 2Department of Aerospace and Mechanical Engineering,University of Notre Dame, 3Department of Chemistry and Biochemistry, Notre Dame Radiation Laboratory,University of Notre Dame

简介：

Overview

This article presents a method for directly detecting solvated electrons at the plasma-liquid interface using total internal reflection absorption spectroscopy (TIRAS). This technique allows for the measurement of short-lived free radicals, which has implications in fields such as cancer treatment and chemical synthesis.

Key Study Components

Area of Science

• Neuroscience
• Biochemistry
• Plasma Chemistry

Background

• Solvated electrons are short-lived free radicals.
• Plasma-liquid interactions are significant in various chemical processes.
• Low temperature plasma is being explored for medical applications.
• Understanding free radical chemistry is crucial for advancements in treatment methods.

Purpose of Study

• To detect solvated electrons in a plasma-liquid interface.
• To explore the free radical chemistry generated by plasma in aqueous solutions.
• To assess the potential applications of this technique in medicine and chemical synthesis.

Methods Used

• Employing total internal reflection absorption spectroscopy (TIRAS).
• Using a custom plasma electrochemical cell with optical windows.
• Measuring optical absorbance of red light near 700 nm.
• Conducting experiments at specific angles to optimize detection.

Main Results

• Successful identification of solvated electrons through their light absorption.
• Demonstrated the feasibility of TIRAS for measuring short-lived radicals.
• Provided insights into the implications of plasma chemistry in medicine.
• Highlighted the potential for advancing chemical synthesis techniques.

Conclusions

• TIRAS is an effective method for detecting solvated electrons.
• This technique can enhance understanding of plasma-liquid interactions.
• It opens avenues for research in cancer treatment and chemical processes.

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