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Semiconductors01:22

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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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Fully rubbery integrated electronics from high effective mobility intrinsically stretchable semiconductors.

Kyoseung Sim1, Zhoulyu Rao1, Hae-Jin Kim2,3

  • 1Materials Science and Engineering Program, University of Houston, Houston, TX 77204, USA.

Science Advances
|February 13, 2019
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Summary
This summary is machine-generated.

Researchers developed fully rubbery integrated electronics using a novel semiconductor composite. This breakthrough enables high-performance stretchable electronics that maintain electrical function even under significant stretching.

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • High-performance stretchable electronics require intrinsically stretchable semiconductors with high carrier mobility.
  • Mechanical deformation is a key challenge for conventional electronic materials and devices.

Purpose of the Study:

  • To develop fully rubbery integrated electronics with high performance.
  • To enhance carrier mobility in rubbery semiconductor composites for improved electronic function.

Main Methods:

  • Incorporation of metallic carbon nanotubes into a rubbery semiconductor composite.
  • Fabrication of transistors, transistor arrays, and logic gates using the developed material.
  • Testing of electrical performance under 50% mechanical stretching.

Main Results:

  • Achieved a rubbery semiconductor composite with high effective carrier mobility.
  • Demonstrated transistors and arrays that retain electrical performance after 50% stretching.
  • Successfully developed and tested fully rubbery integrated electronics and logic gates.

Conclusions:

  • The novel rubbery semiconductor composite enables high-performance, intrinsically stretchable electronics.
  • The developed materials and devices are suitable for applications requiring large mechanical deformation, such as elastic tactile sensing skins.