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 Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

3.2K
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
3.2K
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

4.0K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
4.0K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

2.1K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
2.1K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.5K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.5K
Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

5.1K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
5.1K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.5K

You might also read

Related Articles

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

Sort by
Same author

Electronic Relaxation Dynamics of the Au<sub>42</sub>(SC<sub>8</sub>H<sub>9</sub>)<sub>32</sub> Cluster Nanorod Studied Using 2D Electronic Spectroscopy.

The journal of physical chemistry letters·2025
Same author

Structure-Dependent Electronic Relaxation Dynamics of Two-Dimensional Silver Monolayers.

Nano letters·2025
Same author

Plasmon-mediated nonlinear optics and dynamics.

The Journal of chemical physics·2025
Same author

Diverse Superatomic Magnetic and Spin Properties of Au<sub>144</sub>(SC<sub>8</sub>H<sub>9</sub>)<sub>60</sub> Clusters.

ACS central science·2025
Same author

Solvent Dependence of [Au<sub>11</sub>(BINAP)<sub>4</sub>X<sub>2</sub>: X = Cl or Br]<sup>+</sup> Cluster Electronic and Optical Properties.

The journal of physical chemistry. A·2025
Same author

The Influence of Passivating Ligand Identity on Au<sub>25</sub>(SR)<sub>18</sub> Spin-Polarized Emission.

The journal of physical chemistry letters·2025
Same journal

Real-Time Vibrational Spectroscopy Reveals an Inversion Transition State in the Photoisomerization of Phenylazoimidazole.

The journal of physical chemistry letters·2026
Same journal

Precursor-Directed Self-Assembly in Hydrothermal Carbon Nitride Nanostructures Revealed by Nano-FTIR.

The journal of physical chemistry letters·2026
Same journal

Correction to "Equation-of-Motion Block-Correlated Coupled Cluster Method for Excited Electronic States of Strongly Correlated Systems".

The journal of physical chemistry letters·2026
Same journal

Rationalizing Stacking-Dependent Charge Injection Dynamics in Radical-Based Organic Light-Emitting Diodes.

The journal of physical chemistry letters·2026
Same journal

Bottom-Up Formation of the Simplest Geminal Thiol─Methanedithiol (CH<sub>2</sub>(SH)<sub>2</sub>)─and the Methyl Hydrodisulfide (H<sub>3</sub>CSSH) Isomer in Interstellar Analogue Ices.

The journal of physical chemistry letters·2026
Same journal

Trion Mediated Sequential Charge Separation in Functionalized CsPbBr<sub>3</sub>/AgInS<sub>2</sub> Hybrid Nanocrystals.

The journal of physical chemistry letters·2026
See all related articles

Related Experiment Video

Updated: Mar 11, 2026

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
10:00

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Published on: July 5, 2016

12.5K

Resolving State-Specific Energy Flow in Metal Nanoclusters Using 2D Electronic Spectroscopy.

Daniel J Heintzelman1, Kenneth L Knappenberger1

  • 1Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States.

The Journal of Physical Chemistry Letters
|March 10, 2026
PubMed
Summary
This summary is machine-generated.

Two-dimensional electronic spectroscopy (2DES) reveals state-specific energy flow in gold nanoclusters. This technique overcomes limitations of conventional methods, enabling detailed understanding of photophysical properties for advanced photonic materials.

More Related Videos

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

10.3K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

Related Experiment Videos

Last Updated: Mar 11, 2026

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
10:00

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Published on: July 5, 2016

12.5K
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

10.3K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

Area of Science:

  • Physical Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Sub-to-few-nanometer gold nanoclusters possess unique electronic states influencing energy flow.
  • Conventional ultrafast transient spectroscopy faces spectral congestion, hindering mechanistic insights into energy dynamics.
  • Understanding these dynamics is crucial for developing novel photonic materials.

Purpose of the Study:

  • To describe the application of two-dimensional electronic spectroscopy (2DES) for resolving state-specific electronic relaxation dynamics in gold nanoclusters.
  • To demonstrate how 2DES can provide mechanistic insights into energy flow within nanoclusters.
  • To explore the potential of 2DES for advancing the understanding of metal nanocluster photophysics.

Main Methods:

  • Utilized two-dimensional electronic spectroscopy (2DES) to probe electronic relaxation dynamics.
  • Employed excitation-detection frequency correlations inherent to 2D measurements.
  • Incorporated polarization-dependent measurements to analyze the influence of electronic state symmetry.
  • Applied crosspeak-specific 2DES to differentiate relaxation pathways.

Main Results:

  • 2DES successfully resolved electronic relaxation within specific gold superatom states.
  • Polarization-dependent 2DES distinguished the impact of electronic state symmetry on carrier relaxation.
  • Crosspeak-specific 2DES differentiated sequential relaxation from collective nanoparticle dynamics.
  • Demonstrated state-specific mechanisms of energy flow in gold nanoclusters.

Conclusions:

  • 2DES is a powerful technique for elucidating state-specific photophysical properties of metal nanoclusters.
  • The method overcomes spectral congestion issues of conventional spectroscopy.
  • Provides detailed mechanistic insights crucial for the design of advanced photonic materials based on nanoclusters.