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Alkali Metals

Alkali Metals

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

Bonding in Metals

Bonding in Metals

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”.

Metallic Solids

Metallic Solids

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....

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

Properties of Transition Metals

Properties of Transition Metals

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.

Hybridoma Technology

Hybridoma Technology

Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
Hybridoma Selection
Commonly used fusion techniques — electroporation,...

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Author Spotlight: Advancements and Applications in Nanoparticle Synthesis Through Laser Ablation in Liquids

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Nanostructured metals for light-based technologies.

Reuven Gordon¹

¹University of Victoria, Canada.

|March 14, 2019

Summary

This summary is machine-generated.

Nanostructuring metals enables advanced light-based technologies by controlling light-metal interactions. This review covers theory, nanofabrication, and applications like sensing, energy harvesting, and optical data storage.

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Area of Science:

Physics and Materials Science
Optics and Photonics

Background:

Theories of light-metal interaction date to the early 1900s.
Recent advances in nanofabrication have renewed interest in nanostructured metals for light technologies.

Purpose of the Study:

To provide a broad overview of concepts and applications of nanostructuring metals for light-based technologies.
To discuss the theory of metal response to oscillating fields, including nonlocal, nonlinear, and quantum effects.

Main Methods:

Theoretical analysis of electromagnetic wave guiding and light scattering by metal nanostructures.
Overview of nanofabrication techniques for creating metal nanostructures.
Review of existing and emerging light-based applications.

Main Results:

Nanostructured metals allow for tighter confinement and slower propagation of light.
Metal nanostructures influence light scattering, enabling phenomena like plasmonic resonances and directivity enhancement.
Key theoretical results include the maximum power transfer theorem and scaling of gap plasmons.

Conclusions:

Nanostructuring metals offers significant potential for advancing light-based technologies.
Applications span sensing, spectroscopy, detection, energy harvesting, light emission, and advanced optical techniques.
Continued research in nanofabrication and theoretical understanding will drive future innovations.