Related Experiment Video
Updated: Feb 23, 2026
10:22
In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
18.9K
Spatiotemporal Organization of Catalysts Driven by Enhanced Diffusion
C Weistuch1,2, S Pressé3
1Department of Applied Mathematics and Statistics , Stony Brook University , Stony Brook , New York 11794 , United States.
The Journal of Physical Chemistry. B
|September 14, 2017
Summary
Active catalysts like enzymes and platinum nanoparticles exhibit increased diffusion with higher reaction rates. This phenomenon can drive catalyst organization through chemical reactions, potentially impacting cell signaling.
Area of Science:
- Physical Chemistry
- Biophysics
- Materials Science
Background:
- Diffusion coefficients of active catalysts correlate with their catalytic rates.
- This effect is observed in both biological enzymes and material catalysts like platinum nanoparticles.
- Differences in diffusion can be used to spatially separate active from inactive catalysts.
Purpose of the Study:
- To investigate the spatiotemporal organization of catalysts driven by their diffusion properties.
- To explore how chemical reactions influence catalyst interactions and spatial arrangement.
- To consider the implications for intracellular processes, such as cell signaling.
Main Methods:
- Utilizing principles from microfluidics and fluorescence correlation spectroscopy.
- Analyzing the relationship between catalytic activity, diffusion, and spatial organization.
- Modeling chemical reactions to understand catalyst interactions.
Main Results:
- Chemical reactions, including coupled reactions, can induce effective attraction or repulsion between catalysts.
- This induced interaction drives the spatiotemporal organization of catalysts.
- The findings demonstrate a link between catalytic activity and collective catalyst behavior.
Conclusions:
- Catalyst diffusion properties influenced by reaction rates play a crucial role in their organization.
- Chemical reactions can create dynamic spatial patterns of catalysts.
- This mechanism may be relevant for understanding internal cell signaling pathways.
More Related Videos
08:25Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
7.8K
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
13.4K
Related Concept Videos
02:50Catalysis
30.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.9K
01:22Factors Influencing the Rate of Chemical Reactions
8.9K
A variety of factors influence the rate of chemical reactions. For a chemical reaction to happen, atoms must collide with enough energy to overcome the repulsion between their electrons. This energy is called activation energy. Factors influencing the rate of reaction either lower the activation energy or increase the likelihood of a successful collision.
Concentration and Pressure:
The more particles present within a given space, the more likely those particles are to bump into one another....
Concentration and Pressure:
The more particles present within a given space, the more likely those particles are to bump into one another....
8.9K
01:13Introduction to Mechanisms of Enzyme Catalysis
11.0K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
11.0K
01:07Catalytically Perfect Enzymes
5.2K
The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
Most enzymes...
Most enzymes...
5.2K
02:24Predicting Reaction Outcomes
11.1K
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,...
11.1K
01:13Induced-fit Model
89.9K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
89.9K