Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Adsorption of Gases on Solids

Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...

Hydrogen Bonds

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...

Hydrogen Bonds

Hydrogen Bonds

Hydrogen BondsHydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.Hydrogen Bonds Control the World!Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are...

Adsorption Isotherms I

Adsorption Isotherms I

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...

Adsorption Isotherms II

Adsorption Isotherms II

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...

Molecular Orbital Theory II

Molecular Orbital Theory II

Molecular Orbital Energy Diagrams

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Lifestyle factors and comorbidities in gout patients compared to the general population in Western Sweden: results from a questionnaire study.

Scandinavian journal of rheumatology·2022

Same author

Temporal overexpression of SIRT1 in skeletal muscle of adult mice does not improve insulin sensitivity or markers of mitochondrial biogenesis.

Acta physiologica (Oxford, England)·2017

Same author

The early clinical course of infliximab treatment in rheumatoid arthritis: results from the REMARK observational study.

Clinical and experimental rheumatology·2014

Same author

Emission factors for gases and particle-bound substances produced by firing lead-free small-caliber ammunition.

Journal of occupational and environmental hygiene·2013

Same author

Desorption of H2, HD, and D2 through temporary negative ion formation.

Physical review letters·2012

Same author

Image formation mechanisms in scanning electron microscopy of carbon nanotubes, and retrieval of their intrinsic dimensions.

Ultramicroscopy·2012

Search research articles

Related Experiment Video

Updated: Jul 20, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Molecular hydrogen adsorption at surface adatoms.

J Bellman¹, K Svensson, S Andersson

¹Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.

The Journal of Chemical Physics

|September 1, 2006

Summary

Molecular hydrogen (D2) preferentially adsorbs to copper and gold adatoms on a copper surface, forming a physisorbed state with enhanced binding. This interaction is distinct from chemisorption and shows unique spectral signatures.

More Related Videos

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Related Experiment Videos

Last Updated: Jul 20, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Area of Science:

Surface Science
Physical Chemistry
Materials Science

Background:

Understanding molecule-surface interactions is crucial for catalysis and materials design.
Physisorption and chemisorption exhibit distinct binding characteristics and spectral features.

Purpose of the Study:

To investigate the adsorption behavior of molecular hydrogen (D2) on copper (Cu) and gold (Au) adatoms on a Cu(100) surface.
To characterize the nature of the D2-adatom interaction and its binding properties.

Main Methods:

Electron-energy-loss spectroscopy (EELS) was employed to study D2 adsorption.
Measurements were performed on D2 interacting with Au adatoms on a cold Cu(100) substrate.

Main Results:

Preferential adsorption of D2 was observed at Cu and Au adatoms, indicating enhanced binding energies.
The adsorption state was identified as physisorption, with D2 rotational and vibrational transition energies close to gas-phase values.
Induced dipole activity in D2 rotational transitions served as a signature for adsorption at adatoms versus the bare substrate.

Conclusions:

D2 molecules physisorb to Au adatoms on Cu(100) with enhanced binding.
The D2-Au interaction exhibits unique spectral features, distinguishing it from adsorption on the bare substrate.
Lower adatom coverages favor higher D2 molecule-to-adatom ratios, forming dense 2D configurations.