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Sample Preparation in Quartz Crystal Microbalance Measurements of Protein Adsorption and Polymer Mechanics

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Quartz microbalance device for transfer into ultrahigh vacuum systems.

F Stavale¹, H Niehus, C A Achete

¹Divisão de Metrologia de Materiais, Inmetro, CEP 25250-020, Xerém, Duque de Caxias, Rio de Janeiro, Brazil. flstavale@inmetro.gov.br

The Review of Scientific Instruments

|December 3, 2008

Summary

A new quartz microbalance device enables precise flux calibration in ultrahigh vacuum (UHV) systems. This advancement is crucial for accurate thin film deposition and material evaporation processes.

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Area of Science:

Materials Science
Vacuum Technology
Surface Science

Background:

Accurate flux calibration is essential for reproducible thin film deposition.
Existing methods for in-situ calibration in ultrahigh vacuum (UHV) can be cumbersome.
Material evaporation requires precise control over deposition rates.

Purpose of the Study:

To develop a simple and transferable quartz microbalance device for UHV systems.
To enable accurate flux calibration of various material evaporators.
To demonstrate the device's capability for monolayer and submonolayer deposition calibration.

Main Methods:

Development of a quartz microbalance device compatible with UHV systems.
Integration of the device onto a commercial specimen holder for easy transfer.
Positioning the device precisely at the sample location for calibration.
Demonstration using vanadium depositions.

Main Results:

The developed quartz microbalance is easily transferable into UHV systems.
The device allows for precise positioning near the sample stage.
Calibration sensitivity achieved was less than 0.001 monolayer (ML) coverage for vanadium.
The system facilitates in-situ loading of experimental specimens.

Conclusions:

The uncomplicated quartz microbalance device is highly effective for UHV flux calibration.
This technology enhances the accuracy and reproducibility of thin film deposition.
The device offers a practical solution for calibrating material evaporators in UHV environments.