Related Experiment Video
Updated: Feb 15, 2026
13:37
Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
Published on: April 1, 2013
16.7K
Plasmonic Horizon in Gold Nanosponges
Cynthia Vidal1, Dmitry Sivun1, Johannes Ziegler1
1Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria.
Nano Letters
|January 17, 2018
Summary
Electromagnetic waves create polarized light scattering in gold nanosponges. Electron-hole recombination, however, generates unpolarized light due to limited plasmonic hot-spot excitation, especially in larger nanosponges.
Area of Science:
- Plasmonics
- Nanophotonics
- Materials Science
Background:
- Gold nanosponges exhibit unique electromagnetic properties.
- Plasmonic hot-spots are crucial for light-matter interactions in nanomaterials.
Purpose of the Study:
- To investigate the polarization dependence of light scattering and photoluminescence in gold nanosponges.
- To differentiate the excitation mechanisms of plasmonic hot-spots.
Main Methods:
- Theoretical modeling of electromagnetic wave interaction with gold nanosponges.
- Analysis of plasmon lifetime and information propagation speed.
- Characterization of scattering and photoluminescence spectra.
Main Results:
- Coherent excitation by electromagnetic waves leads to polarization-dependent scattering.
- Electron-hole recombination creates localized plasmonic hot-spots within a ~57 nm horizon.
- Photoluminescence from larger gold nanosponges appears unpolarized due to limited hot-spot excitation range.
Conclusions:
- The excitation source dictates the polarization characteristics of light emission from gold nanosponges.
- The finite lifetime of plasmons and information speed limit the spatial extent of hot-spot excitation in recombination processes.
- Size-dependent polarization behavior in gold nanosponges is linked to the interplay between plasmon dynamics and material dimensions.
Related Concept Videos
01:21Schwarzschild Radius and Event Horizon
2.8K
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
2.8K
02:23The Soil Ecosystem
25.0K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
25.0K
01:54Molar Mass
87.2K
The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties.
87.2K
03:37Uncertainty in Measurement: Accuracy and Precision
106.0K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.
106.0K
02:57Physical and Chemical Properties of Matter
167.7K
The characteristics that enable us to distinguish one substance from another are called properties.
167.7K
03:37Subatomic Particles
114.4K
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
114.4K