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Related Concept Videos

Chirality in Nature02:30

Chirality in Nature

13.4K
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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Chirality02:25

Chirality

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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.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Related Experiment Video

Updated: Jul 2, 2025

Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates
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Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates

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Twisted DNA Origami-Based Chiral Monolayers for Spin Filtering.

Haozhi Wang1, Fangfei Yin2, Lingyun Li1

  • 1School of Chemistry and Chemical Engineering, New Cornerstone Science Laboratory, Frontiers Science Center for Transformative Molecules, Zhangjiang Institute for Advanced Study and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China.

Journal of the American Chemical Society
|February 26, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed advanced DNA origami chiral monolayers for improved biosensor and bioelectronic applications. These novel structures offer enhanced spin-filtering efficiency compared to conventional DNA monolayers.

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Area of Science:

  • * DNA nanotechnology
  • * Chirality in materials science
  • * Bioelectronics and biosensors

Background:

  • * DNA monolayers are crucial for biosensors, DNA chips, and bioelectronics.
  • * Conventional single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA) chiral monolayers often lack order and design flexibility.
  • * Structural DNA nanotechnology offers a solution to overcome these limitations.

Purpose of the Study:

  • * To present a novel strategy for creating adaptable twisted DNA origami-based chiral monolayers.
  • * To address the structural disorder and limited design flexibility of conventional DNA monolayers.
  • * To investigate the spin-filtering capabilities of these new DNA structures.

Main Methods:

  • * Fabrication of twisted DNA origami structures.
  • * Characterization of interfacial assembly properties.
  • * Evaluation of spin-filtering efficiency in DNA origami-based chiral monolayers.

Main Results:

  • * DNA origami-based chiral monolayers exhibit distinct interfacial assembly.
  • * These structures effectively reduce the disorder found in dsDNA monolayers.
  • * A maximal one-order-of-magnitude increase in spin-filtering efficiency per unit area was observed compared to dsDNA monolayers.
  • * Higher-order tertiary chiral structures in DNA origami further enhance spin-filtering efficiency.

Conclusions:

  • * Twisted DNA origami provides a highly adaptable platform for chiral monolayer design.
  • * This approach overcomes limitations of conventional DNA monolayers in terms of order and flexibility.
  • * The enhanced spin-filtering efficiency demonstrates the potential for advanced applications in bioelectronics and spintronics.