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Related Concept Videos

Phase Transitions02:31

Phase Transitions

21.0K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Phase Changes01:19

Phase Changes

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Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
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Stimuli-Responsive Phase Change Materials: Optical and Optoelectronic Applications.

Irene Vassalini1,2,3, Ivano Alessandri1,2,3, Domenico de Ceglia3,4

  • 1INSTM, Research Unit of Brescia, Via Branze 38, 25123 Brescia, Italy.

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|July 2, 2021
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Summary

Phase change materials (PCMs) exhibit significant optical property shifts, enabling applications in advanced devices. This review explores PCMs like germanium-antimonium tellurides and vanadium dioxide (VO2), detailing their potential and challenges.

Keywords:
GSTVO2active photonicsdisplaysmemoriesmetasurfacesoptical switchesphase change materialsthin films

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Optoelectronics

Background:

  • Stimuli-responsive materials enable novel solid-state device fabrication.
  • Phase change materials (PCMs) demonstrate rapid, substantial optical property changes during phase transitions.
  • These properties make PCMs suitable for sensors, displays, and memory devices.

Purpose of the Study:

  • To review various phase change materials (PCMs).
  • To analyze PCMs, specifically germanium-antimonium tellurides and vanadium dioxide (VO2).
  • To discuss the applications, potential, limitations, and challenges of these PCMs.

Main Methods:

  • Literature review of phase change materials.
  • Analysis of optical property changes in PCMs.
  • Examination of applications in sensors, displays, and memory devices.

Main Results:

  • PCMs like germanium-antimonium tellurides and VO2 show promise for various applications.
  • The review details specific applications in photonic memories and optoelectronics.
  • Identified limitations and challenges for practical implementation.

Conclusions:

  • Phase change materials are crucial for advanced solid-state devices.
  • Germanium-antimonium tellurides and VO2 are key examples with diverse applications.
  • Further research is needed to overcome limitations and fully realize PCM potential.