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Related Concept Videos

Range00:59

Range

14.2K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
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IR Spectrum Peak Broadening: Hydrogen Bonding01:23

IR Spectrum Peak Broadening: Hydrogen Bonding

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The vibrational frequency of a bond is directly proportional to its bond strength. As a result, stronger bonds vibrate at higher frequencies, while weaker bonds vibrate at lower frequencies. The stretching vibration of the strong O–H bond in alcohols and phenols (very dilute solution or gas phase) appears as a sharp peak at 3600–3650 cm−1.
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular...
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Properties of Transition Metals02:58

Properties of Transition Metals

29.8K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
29.8K
Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.4K
Metallic Solids02:37

Metallic Solids

20.6K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.6K
Alkali Metals03:06

Alkali Metals

24.6K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.6K

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Broadening the Plasmonic Spectral Range of Metallic Metasurfaces Using Dual-Material Arrays.

M Dewynter1, A Sraj1, J Loze1

  • 1L2n, CNRS UMR7076, Université de Technologie de Troyes, 10000 Troyes, France.

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|February 2, 2026
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Summary
This summary is machine-generated.

This study explores bimetallic plasmonic nanoparticle arrays, demonstrating a novel mechanism for broadband surface lattice resonances. This hybridization of gold and aluminum plasmonic responses offers new possibilities for advanced sensing and photonics applications.

Keywords:
aluminumgoldmetasurfacesplasmonicssurface lattice resonances

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Area of Science:

  • Plasmonics and Nanophotonics
  • Materials Science
  • Optical Engineering

Background:

  • Plasmonic nanoparticles exhibit localized surface plasmon resonances (LSPR), with spectral features dependent on size, shape, and material.
  • Periodically arranged nanoparticles can support diffractive modes coupled to Rayleigh anomalies (RA).
  • The coupling of LSPR and RA leads to surface lattice resonances (SLRs), offering strong field confinement and enhanced scattering for applications in sensing and light emission.

Purpose of the Study:

  • To investigate bimetallic nanoparticle arrays, specifically checkerboard arrangements of gold and aluminum.
  • To demonstrate and characterize broadband surface lattice modes resulting from the hybridization of distinct plasmonic responses in bimetallic systems.
  • To explore a previously unreported coupling mechanism between gold and aluminum dipolar resonances via Rayleigh anomalies.

Main Methods:

  • Fabrication and characterization of checkerboard arrays of gold and aluminum nanoparticles.
  • Numerical simulations to model plasmonic responses and resonance coupling.
  • Experimental measurements of optical properties, including scattering and absorption spectra.

Main Results:

  • Demonstration of broadband surface lattice modes in gold-aluminum bimetallic arrays.
  • Observation of hybridization between gold and aluminum dipolar resonances.
  • Evidence of coupling via the same Rayleigh anomaly in the near-infrared, extending beyond the typical plasmonic range of aluminum.

Conclusions:

  • Bimetallic nanoparticle arrays offer a new pathway to achieve broadband surface lattice resonances through plasmonic response hybridization.
  • The demonstrated coupling mechanism via Rayleigh anomalies in gold-aluminum systems opens avenues for high-performance plasmonic devices.
  • These findings have significant implications for developing advanced materials for sensing, photonics, and telecommunications.