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Stress or Strain Does Not Impact Sorption in Stiff Mesoporous Materials
M Bossert1, A Grosman1, I Trimaille1
1Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, 75005 Paris, France.
Langmuir : the ACS Journal of Surfaces and Colloids
|August 26, 2020
Summary
External mechanical strain does not affect sorption in mesoporous silicon, contrary to previous findings. This study confirms no measurable impact on sorption isotherms for stiff mesoporous materials.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Mesoporous silicon is a key material in nanotechnology.
- Previous studies suggested strain influences sorption properties.
- Understanding sorption behavior is crucial for material applications.
Purpose of the Study:
- To investigate the effect of mechanical strain on sorption in mesoporous silicon.
- To verify or refute previous claims of strain-induced sorption.
- To determine the impact of strain on sorption isotherms.
Main Methods:
- Experimental measurement of sorption isotherms under applied mechanical strain.
- Analysis of sorption-induced strain in porous silicon.
- Comparison with data from other mesoporous materials like porous silicas.
Main Results:
- No measurable impact of external mechanical strain or stress on sorption isotherms was observed.
- The relative accuracy of the measurements was down to 10^-3.
- Sorption-induced strain analysis supports the conclusion.
Conclusions:
- External mechanical strain does not significantly influence sorption in mesoporous silicon.
- Findings contradict prior indirect evidence.
- The results are consistent for other stiff mesoporous materials.
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