Related Experiment Video
Updated: Aug 7, 2025
09:43
Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
Published on: April 11, 2020
6.7K
Microscopic theory of adsorption kinetics
Yuval Scher1, Ofek Lauber Bonomo1, Arnab Pal2
1School of Chemistry, Center for the Physics and Chemistry of Living Systems, Ratner Institute for Single Molecule Chemistry, and the Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, 6997801 Tel Aviv, Israel.
The Journal of Chemical Physics
|March 8, 2023
Summary
This study introduces a microscopic theory for adsorption kinetics, providing a detailed understanding of single-particle adsorption. It derives a generalized Ward-Tordai relation, offering new insights into surface science and nano-device design.
Area of Science:
- Physical Chemistry
- Surface Science
- Chemical Engineering
Background:
- Adsorption is a well-established phenomenon with macroscopic theories dating back over a century.
- A detailed microscopic theory for single-particle adsorption kinetics remains underdeveloped despite recent advancements.
Purpose of the Study:
- To develop a comprehensive microscopic theory for adsorption kinetics.
- To bridge the gap in understanding single-particle adsorption dynamics.
- To provide a foundation for solving previously unsolved adsorption problems.
Main Methods:
- Development of a microscopic theory for adsorption kinetics.
- Derivation of the microscopic Ward-Tordai relation.
- Generalization of the Ward-Tordai relation to arbitrary dimensions, geometries, and initial conditions.
Main Results:
- A detailed microscopic theory of adsorption kinetics is established.
- The microscopic Ward-Tordai relation is derived, connecting surface and subsurface adsorbate concentrations universally.
- Exact analytical solutions are provided for previously unsolved adsorption problems.
Conclusions:
- The developed framework offers a fundamental understanding of adsorption kinetics.
- The generalized Ward-Tordai relation provides new insights into adsorption dynamics.
- This research opens new avenues in surface science for applications in sensing and nano-device design.
Related Concept Videos
02:24Predicting Reaction Outcomes
8.5K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
8.5K
02:55Temperature Dependence on Reaction Rate
82.4K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
82.4K
01:09Analyte Adsorption and Distribution
713
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...
713
01:19Introduction to Enzyme Kinetics
20.3K
Enzyme kinetics studies the rates of biochemical reactions. Scientists monitor the reaction rates for a particular enzymatic reaction at various substrate concentrations. Additional trials with inhibitors or other molecules that affect the reaction rate may also be performed.
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
20.3K
01:19Enzyme Kinetics
97.5K
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
97.5K
01:23Drug Absorption Mechanism: Passive Membrane Transport
4.1K
Passive transport is a method of drug absorption where small, lipid-soluble drugs can move across the cell membrane. This movement happens along the concentration gradient, which is a natural flow from higher to lower concentration areas. The speed at which the drug moves is directly related to its lipid–water partition coefficient. This means that the more a drug dissolves in lipids, the faster it diffuses or spreads throughout the body. It is important to note that most drugs are either...
4.1K