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Related Concept Videos

Colloids03:22

Colloids

21.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
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Colloids and Suspensions01:17

Colloids and Suspensions

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
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Colloidal precipitates01:09

Colloidal precipitates

6.5K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.5K
Electron Carriers01:24

Electron Carriers

91.9K
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
91.9K
Electron Affinity03:07

Electron Affinity

43.4K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
43.4K
Electron Behavior00:54

Electron Behavior

109.0K
Overview
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the...
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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

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Flexible colloidal nanocrystal electronics.

Cherie R Kagan1

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, 200 South 33rd Street, 364 Levine Hall, Philadelphia, PA 19104, USA. kagan@seas.upenn.edu.

Chemical Society Reviews
|September 13, 2018
PubMed
Summary
This summary is machine-generated.

Colloidal semiconductor nanocrystals (NCs) offer solution-processable materials for flexible electronics. This review highlights advances in NC field-effect transistors and integrated circuits, paving the way for next-generation devices.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Colloidal nanocrystals (NCs) are nanometer-scale crystals of various semiconductor types dispersed in solvents.
  • They represent a highly promising, solution-processable materials class for fabricating thin film and flexible electronic devices.
  • Their properties are tunable based on size, composition, and surface chemistry.

Purpose of the Study:

  • To review the size, composition, and surface chemistry-dependent properties of semiconductor NCs and their derived thin films.
  • To provide physico-chemical insights into recent performance improvements in NC field-effect transistors (FETs).
  • To discuss device design and fabrication methods for flexible NC integrated circuits and identify future challenges and opportunities.

Main Methods:

  • Literature review of semiconductor nanocrystal properties and applications.
  • Analysis of structure-property relationships in NCs and thin films.
  • Examination of device engineering and fabrication techniques for flexible electronics.

Main Results:

  • Semiconductor NCs exhibit tunable properties based on their characteristics, enabling advanced electronic applications.
  • Significant progress has been made in the performance of NC field-effect transistors (FETs).
  • Flexible, colloidal nanocrystal integrated circuits have been demonstrated and scaled.

Conclusions:

  • Advances in NC science and engineering facilitate the development of next-generation electronic materials and devices.
  • Colloidal NCs hold significant potential for future computational applications and the Internet of Things (IoT).
  • Further research is needed to overcome challenges and capitalize on opportunities in NC-based electronics.