Atomic armor for thermal stability in nanoporous structures.

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Nanoporous structures are vital for catalysis, energy storage, and insulation.
• Thermal instability limits the application range of many nanoporous materials.
• Existing stabilization methods often fall short of desired performance.

Purpose of the Study:

• To develop a novel strategy for enhancing the thermal stability of nanoporous structures.
• To investigate the potential of an
• atomic armor
• approach inspired by tardigrade resilience.
• To establish new design parameters for improving material durability at high temperatures.

Main Methods:

• Application of
• atomic armor
• coating at parts-per-million levels on mesoporous silica.
• High-temperature thermal treatment (1,000 °C for 168 h).
• Molecular dynamics simulations using machine-learned interatomic potentials and metabasin escape algorithm.

Main Results:

• Demonstrated a fivefold increase in specific surface area and a sixfold increase in pore volume after treatment.
• Achieved a 66% reduction in thermal conductivity, surpassing existing techniques.
• Identified glass transition temperature and fragility as key design parameters for sintering resistance.
• Revealed that non-glass-forming materials can exhibit glass transition properties, with alumina showing a record-high value.

Conclusions:

• The
• atomic armor
• strategy effectively enhances thermal stability in nanoporous materials.
• Surface viscosity, glass transition temperature, and fragility are critical for sintering resistance.
• This post-treatment process is simple, universal, and significantly improves material performance for demanding applications.