sorptionsinduzierte

"sorptionsinduzierte" is a German term that translates to "absorption‑induced" and refers to phenomena that are triggered or significantly altered by the uptake of molecules onto or into a material. In fields such as surface science, materials engineering, and physical chemistry it is used to describe changes in physical or chemical properties that arise when a substance is adsorbed or absorbed. These changes can be mechanical, electrical, optical or structural and are often quantified through sensor responses, strain measurements or spectroscopic data.

In surface science, sorptionsinduzierte effects are central to the study of adsorption isotherms and kinetic models. The energy balance between adsorbate–adsorbent interactions and the surface lattice leads to sorption-induced stresses that can be measured by techniques such as quartz crystal microbalance or surface acoustic wave devices. In porous materials, these stresses are linked to pore‑filling behavior and can induce measurable deformations or phase transitions.

Materials such as zeolites, metal‑organic frameworks and polymer composites frequently exhibit pronounced sorptionsinduzierte responses. When guest molecules occupy pores or interstitial sites, the host lattice may contract or expand, altering pore dimensions and affecting gas diffusion rates. These changes are exploited in selective gas separation membranes, where sorption-induced swelling enhances permeability for certain species while blocking others.

The practical applications of sorptionsinduzierte phenomena are widespread. In sensor technology, the adsorption of analytes causes measurable changes in mass, resonance frequency or electrical impedance, enabling detection of gases, vapors or biomolecules at low concentrations. In catalysis, the structural plasticity induced by sorption can create or block active sites, altering reaction pathways or catalytic efficiency.

Recent research has focused on tailoring sorptionsinduzierte effects through nano‑engineering of surface roughness, defect density, or mixed‑metal sites. By optimizing these parameters, scientists aim to design adaptive materials that respond predictably to environmental stimuli, thereby improving performance in energy storage, environmental remediation, and biomedical diagnostics.