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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

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Development of the materials analysis and particle probe for Proto-MPEX.

C J Beers¹, C Jaramillo², N C Reid³

¹Department of Energy Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.

The Review of Scientific Instruments

|July 10, 2021

Summary

The new Materials Analysis and Particle Probe (MAPP) enables plasma-material interaction studies using the Prototype Material Plasma Exposure eXperiment (Proto-MPEX). Initial tungsten exposure revealed surface deposition, underscoring the need for in situ measurements.

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Area of Science:

Plasma physics
Materials science
Surface science

Background:

The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device for plasma source research and development.
It is designed for future plasma-material interaction studies.

Purpose of the Study:

To present the design of the new Materials Analysis and Particle Probe (MAPP).
To report initial findings from tungsten sample exposure and ex situ analysis.

Main Methods:

Construction of the MAPP with a sample holder/manipulator and custom vacuum chamber.
Integration of various surface chemistry diagnostic ports (XPS, TDS, ISS, DRS).
Sample manipulation for exposure in Proto-MPEX and analysis in MAPP, with heating up to 1200°C.

Main Results:

The MAPP design facilitates rapid sample turnaround and in vacuo surface characterization.
Ex situ analysis of the first tungsten sample exposure showed a surface deposition layer.

Conclusions:

The MAPP is a functional system for plasma-material interaction studies.
The observed deposition highlights the necessity for in situ measurements within Proto-MPEX for comprehensive analysis.