Monolayer Adsorption
Monolayer Adsorption - Related Videos
07:18
Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
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Cited by 5 •
2017
With solar energy as the driving force, a novel adsorption refrigeration system has been developed and experimentally investigated. Water vapor and zeolite formed the working pair of the adsorption system. This manuscript describes the setup of the experimental rig, the operation procedure, and the important results.
14:18
Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry
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Cited by 1 •
2011
Alkanethiolate stabilized gold colloids known as monolayer protected clusters (MPCs) are synthesized, characterized, and assembled into thin films as an adsorption interface for protein monolayer electrochemistry of simple redox protein like Pseudomonas aeruginosa azurin (AZ) and cytochrome c (cyt c).
01:29
Adsorption Isotherms I
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2026
Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed molecules.Consider the...
01:25
Adsorption Isotherms II
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2026
Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...
01:09
Analyte Adsorption and Distribution
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2024
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...
FAQs
The decisive event is competition between two sets of attractive forces: those binding an adsorbate to the surface and those retaining it in the gas or liquid phase. Attachment becomes favorable when the surface interaction wins. This energetic balance explains why chemical composition and the nature of surface sites matter when interpreting interfacial behavior.
Langmuir behavior connects surface coverage with site occupancy. As molecules attach, fewer sites remain available, so additional uptake becomes progressively limited until coverage approaches a maximum. The resulting limit is useful because it links an observed adsorption response to the capacity of the surface, rather than treating uptake as unlimited.
Monolayer adsorption can reveal more than whether a solid captures a substance. The measured behavior can help characterize surface area, pore structure, and the behavior of binding sites. These distinctions matter in chemistry because two solids may interact with adsorbates differently even when their overall composition is similar.
For catalyst evaluation, adsorption data provide a way to examine surface features that support comparison, including accessible surface area, pore structure, and binding-site behavior. Applying monolayer principles helps compare solids through their interfacial characteristics, rather than relying only on bulk chemical composition for this purpose.
In gas separation and environmental remediation, the relevant question is how effectively a solid interacts with a selected substance at its surface. Monolayer adsorption principles help organize that interaction around available sites and limiting coverage. This makes surface behavior relevant to designing or assessing materials intended to capture or distinguish chemical species.
Sensor design and advanced-material development use the same interfacial information in a different way. The occupancy and binding-site behavior of a surface can guide understanding of how it responds to adsorbed molecules. Consequently, monolayer adsorption connects molecular attachment at an interface with practical decisions about material selection and surface characteristics.