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Related Concept Videos

Metallic Solids02:37

Metallic Solids

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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....
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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”. 
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Biasing of Metal-Semiconductor Junctions01:27

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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Properties of Transition Metals02:58

Properties of Transition Metals

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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.
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
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Metal-Ligand Bonds02:51

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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.
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Metallic: A Bivalent Ambimodal Material Property?

Charles Spence1, Fabiana M Carvalho2, David Howes3

  • 1Crossmodal Research Laboratory, University of Oxford, Oxford, United Kingdom.

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Summary
This summary is machine-generated.

The term "metallic" has positive visual associations but negative chemical sensory associations. This review explores the varied meanings of metallic sensations and positive sensation transference from metallic serviceware.

Keywords:
ambimodalflavourmaterial perceptionmetallicodourtaste

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Area of Science:

  • Cross-modal sensory perception
  • Psychophysics of sensation
  • Material culture and symbolism

Background:

  • The term 'metallic' describes a wide range of sensory experiences across different modalities.
  • Visually, 'metallic' is typically a positive descriptor, often associated with precious metals and their symbolic value.
  • In contrast, non-visual 'metallic' sensations, particularly those from chemical senses, are frequently perceived as unfamiliar and unpleasant.

Purpose of the Study:

  • To review and synthesize the diverse sensory stimuli referred to as 'metallic'.
  • To summarize the multifaceted, often symbolic, meanings attributed to metals, especially precious ones.
  • To examine the phenomenon of sensation transference from metallic serviceware to food and beverages.

Main Methods:

  • Literature review of studies investigating the perception and meaning of metallic sensory experiences.
  • Analysis of symbolic meanings associated with various metals throughout human history.
  • Examination of research on sensory transference, specifically concerning metallic materials.

Main Results:

  • The perception of 'metallic' varies significantly across sensory modalities, with a notable valence shift from positive (vision) to negative (chemical senses).
  • The term 'metallic' outside of vision often denotes unfamiliar or unpleasant sensations rather than a distinct perceptual attribute.
  • Evidence supports positive sensation transference, where the use of metallic serviceware enhances the perceived taste and quality of food and drink.

Conclusions:

  • The interpretation and valence of 'metallic' sensations are highly context-dependent, influenced by sensory modality and cultural symbolism.
  • Understanding cross-modal sensory perception is crucial for explaining the divergent meanings of 'metallic'.
  • Metallic serviceware can positively influence food and beverage perception through sensory transference, highlighting the interplay between material properties and sensory experience.