Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Structure01:33

Atomic Structure

All matter is composed of atoms, the smallest individual units of elements. Each atom is made up of three subatomic particles: protons, neutrons, and electrons. Together, these three particles account for the mass and the charge of an atom.The History of Atomic TheoryThe first person to propose that everything on Earth is made up of tiny particles was the Greek philosopher Democritus, around 450 B.C. He used the term atomos, Greek for “indivisible,” from which the modern term “atom” is derived.
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Electronic Structure of Atoms02:28

Electronic Structure of Atoms


An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers:  n, l, ml, and...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
Atomic Structure01:17

Atomic Structure

The Greek philosopher Democritus proposed that everything on Earth is made up of tiny particles called atomos, Greek for "indivisible," from which the modern term "atom" is derived. In the 19th century, John Dalton proposed the atomic theory that is still largely correct today. He put forth five postulates to explain how atoms made up the world around us. (1) All matter is composed of infinitely small particles or atoms. (2) All atoms of a given element are identical to one another and (3) are...

You might also read

Related Articles

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

Sort by
Same author

Thermopower Probe of Fractional Quantum Hall States in Monolayer Graphene.

Physical review letters·2026
Same author

Quantum Monte Carlo and Density Functional Theory Study of Strain and Magnetism in 2D 1T-VSe<sub>2</sub> with Charge Density Wave States.

ACS nano·2025
Same author

Modeling Pb(II) Adsorption on Mineral Surfaces: Bridging Density Functional Theory and Experiment with Thermodynamic Insights.

The journal of physical chemistry. A·2025
Same author

High-throughput Density Functional Perturbation Theory and Machine Learning Predictions of Infrared, Piezoelectric and Dielectric Responses.

npj computational materials·2024
Same author

MPpredictor: An Artificial Intelligence-Driven Web Tool for Composition-Based Material Property Prediction.

Journal of chemical information and modeling·2023
Same author

Systematic DFT+U and Quantum Monte Carlo Benchmark of Magnetic Two-Dimensional (2D) CrX<sub>3</sub> (X = I, Br, Cl, F).

The journal of physical chemistry. C, Nanomaterials and interfaces·2023

Related Experiment Video

Updated: Jul 9, 2026

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
11:20

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

Electronically induced atom motion in engineered CoCun nanostructures.

Joseph A Stroscio1, Francesca Tavazza, Jason N Crain

  • 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899-8412, USA. joseph.stroscio@nist.gov

Science (New York, N.Y.)
|August 19, 2006
PubMed
Summary
This summary is machine-generated.

We measured how likely a single cobalt (Co) atom in CoCu molecules moves when excited by electrons. Atom motion decreased as molecules got longer, correlating with electronic structure changes.

More Related Videos

A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton
05:47

A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton

Published on: July 29, 2018

Picometer-Precision Atomic Position Tracking through Electron Microscopy
15:04

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

Related Experiment Videos

Last Updated: Jul 9, 2026

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
11:20

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton
05:47

A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton

Published on: July 29, 2018

Picometer-Precision Atomic Position Tracking through Electron Microscopy
15:04

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

Area of Science:

  • Surface Science
  • Atomic Manipulation
  • Quantum Chemistry

Background:

  • Understanding atom dynamics on surfaces is crucial for materials science.
  • CoCu(n) linear molecules serve as model systems for studying atomic interactions.
  • Scanning tunneling microscopy (STM) enables atomic-level manipulation and observation.

Purpose of the Study:

  • To quantify the quantum yield of inducing motion in a single Co atom within CoCu(n) molecules.
  • To investigate the relationship between electronic structure and atomic mobility.
  • To explore the influence of molecular length on atom dynamics.

Main Methods:

  • Fabrication of CoCu(n) linear molecules on a Cu(111) surface.
  • Utilizing scanning tunneling microscopy (STM) for electron excitation and atom manipulation.
  • Performing electronic structure calculations to identify active states.

Main Results:

  • Measured the quantum yield for exciting Co atom motion in CoCu(n) molecules.
  • Observed Co atom switching between two lattice positions upon electron excitation.
  • Correlated the most probable tip location for inducing motion with calculated active state positions.
  • Found that atom motion decreased with increasing molecular length.

Conclusions:

  • The quantum yield of atomic motion is directly influenced by the electronic structure of the Co atom within the molecule.
  • Molecular length plays a significant role in modulating atomic mobility and electronic properties.
  • STM-induced electron excitation is an effective method for probing and controlling atomic dynamics.