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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
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Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Isomerism in Complexes
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Multivalued Logic for Optical Computing with Photonically Enabled Chiral Bio-organic Structures.

Moon Jong Han1, Minkyu Kim1, Vladimir V Tsukruk1

  • 1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.

ACS Nano
|July 26, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed novel photonic bio-organic structures for multilevel computing. These adaptive logic elements use chiral cellulose nanocrystals and organic semiconductors to enable reconfigurable ternary logic for low-power optical information processing.

Keywords:
bio-organic field-effect structureschiral nematic photonicmultifunctional electronicsmultivalued logic systemsoptical multilevel computing

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Area of Science:

  • Bio-organic electronics
  • Photonic computing
  • Multilevel logic systems

Background:

  • Integrated thin-film electronics require advanced logic elements for efficient information processing.
  • Artificial intelligence systems inspire novel approaches for information integration and computing capabilities.
  • Chiral biomaterials offer unique photonic properties for advanced electronic applications.

Purpose of the Study:

  • To propose and demonstrate photonic bio-organic multiphase structures for integrated thin-film electronics.
  • To develop multilevel logic elements capable of reconfigurable ternary logic operations.
  • To facilitate low-power optical computing systems and human-machine interfaces.

Main Methods:

  • Fabrication of bifunctional logic elements combining chiral nematic cellulose nanocrystals with p- and n-type organic semiconductors.
  • Utilizing a reconfigurable photonic bandgap of chiral biomaterials for adaptive logic.
  • Triggering quantized electrical output signals by varying light photon energy and photonic bandgap.

Main Results:

  • Demonstrated adaptive logic elements with tailored quantized electrical output signals.
  • Achieved complex memory behavior and reconfigurable ternary logic response.
  • Showcased the potential for bio-assisted multivalued logic structures.

Conclusions:

  • The developed bio-organic multiphase structures offer a novel platform for multilevel computing.
  • Reconfigurable photonic bandgaps and adaptive logic elements enable efficient optical information processing.
  • This proof-of-concept paves the way for integrated, low-power optical computing systems.