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Updated: Mar 20, 2026
09:55
Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
Published on: December 12, 2013
9.3K
Application of the double paddle oscillator for quantifying environmental, surface mass variation
1Quantum Measurement Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA ; Joint Quantum Institute, University of Maryland, College Park, MD 20742, USA.
Metrologia
|May 24, 2016
Summary
This study demonstrates sub-monolayer sensitivity for gas adsorption and desorption using a double paddle oscillator (DPO) in an ultra-high vacuum (UHV) chamber. The developed apparatus enables quantitative mass change comparisons for materials used as mass artifacts.
Area of Science:
- Materials Science
- Surface Science
- Metrology
Background:
- Accurate mass measurements are crucial for various scientific and industrial applications.
- Understanding gas-material interactions is key for developing sensitive mass artifacts.
- Existing methods may lack the precision for sub-monolayer gas quantification.
Purpose of the Study:
- To establish a robust framework for quantitatively comparing mass changes due to gas adsorption and desorption.
- To develop an apparatus capable of in situ material preparation and gas interaction monitoring.
- To enable comparative evaluation of different materials for mass artifact applications.
Main Methods:
- Utilizing a double paddle oscillator (DPO) within an ultra-high vacuum (UHV) chamber.
- Integrating in situ film deposition, controlled gas admission, and temperature control.
- Performing nitrogen adsorption and desorption experiments directly on the DPO.
Main Results:
- Demonstrated sub-monolayer sensitivity to controlled gas adsorption and desorption.
- Successfully characterized the mass changes of the DPO due to nitrogen gas interactions.
- Validated the performance of the UHV apparatus for in situ material analysis.
Conclusions:
- The developed UHV-DPO system provides a sensitive platform for studying gas-material interactions.
- This framework allows for quantitative comparison of mass changes in potential mass artifact materials.
- The apparatus facilitates in situ surface preparation and monitoring for precise gas interaction studies.
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