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Chirality in Nature02:30

Chirality in Nature

13.6K
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.
13.6K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

5.8K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.8K
Chirality02:25

Chirality

24.7K
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...
24.7K

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Updated: Aug 6, 2025

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
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DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

Published on: September 27, 2019

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キラリティ連続体を持つ光学的に活性なボウタイナノアセンブリ

Prashant Kumar1,2, Thi Vo1,2, Minjeong Cha1,2

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA.

Nature
|March 16, 2023
PubMed
まとめ
この要約は機械生成です。

研究者は 独特のボウタイの形を持つ 調節可能なキラル微粒子を開発し 分子キラル性のバイナリ視点を克服しました これらの粒子は,可調の偏振特性を持つ高度な光学装置の作成を可能にする.

さらに関連する動画

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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Fabrication and Operation of a Nano-Optical Conveyor Belt
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Fabrication and Operation of a Nano-Optical Conveyor Belt

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関連する実験動画

Last Updated: Aug 6, 2025

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
08:59

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

Published on: September 27, 2019

11.6K
Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates
09:17

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

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Fabrication and Operation of a Nano-Optical Conveyor Belt
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Fabrication and Operation of a Nano-Optical Conveyor Belt

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科学分野:

  • ナノテクノロジーと材料科学
  • 物理化学
  • 光学とフォトニクス

背景:

  • 化学におけるキラリティは,連続した数学的な性質にもかかわらず,典型的にはバイナリ属性 (左/右) として見られます.
  • 継続的に調節可能なキラリティを持つ安定した化学構造の欠如は,キラルの材料の応用における進歩を制限する.

研究 の 目的:

  • キラリティの連続性を示すナノ構造の微粒子を合成し,特徴づけること.
  • 先進的な光学装置を 作り出す可能性を探るためだ

主な方法:

  • 自己限定組立を用いたアニゾトロプのボウティーの形状のナノ構造微粒子の製造.
  • 粒子の幾何学 (回転角度,ピッチ,幅,厚さ,長さ) とキラリティの特徴.
  • 円形二重化 (CD) ピークと偏振回転のスペクトル解析

主要な成果:

  • 粒子の大きさを調整することで調整できる ボウタイのナノアセンブリにおけるキラリティの連続性を示した.
  • 吸収効果と分散効果の両方から生じる強力な円形二重化ピークを観測した.
  • CDピークのスペクトル位置と相関するキラリティの測定値と,メタ表面印刷のための可変極化回転を使用した.

結論:

  • ナノ構造のボウタイの微粒子は,材料の連続的なキラリティを実現するための実用的なプラットフォームを提供します.
  • これらの粒子は,スペクトル的に調整可能な超表面の開発を可能にします.
  • 潜在的応用には,高度な光検出と距離測定 (LIDAR) 装置およびその他の光学技術が含まれます.