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Related Concept Videos

Chirality02:25

Chirality

29.2K
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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Chirality in Nature02:30

Chirality in Nature

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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.
16.9K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

14.9K
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...
14.9K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

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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...
6.9K
Frustration and Conflict: Approach-Approach, Approach-Avoidance01:20

Frustration and Conflict: Approach-Approach, Approach-Avoidance

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Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
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Information Processing Approach01:30

Information Processing Approach

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The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
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Related Experiment Video

Updated: Jan 24, 2026

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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Chiral Plasmonic Nanostructures Enabled by Bottom-Up Approaches.

Maximilian J Urban1, Chenqi Shen2, Xiang-Tian Kong3

  • 1Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany;

Annual Review of Physical Chemistry
|May 22, 2019
PubMed
Summary

Chiral plasmonics offers enhanced optical chirality using nanostructures, outperforming molecular counterparts. These engineered systems enable dynamic control for advanced applications in sensing and detection.

Keywords:
chiralitychiroptical responsescircular dichroismnanostructuresoptical activityplasmonics

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Author Spotlight: Single-Molecule Surface-Enhanced Raman Scattering Measurements Enabled by Plasmonic DNA Origami Nanoantennas
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Area of Science:

  • Plasmonics
  • Nanotechnology
  • Chirality

Background:

  • Recent advancements in micro- and nanofabrication have enabled the creation of chiral plasmonic nanostructures.
  • These nanostructures exhibit superior chiroptical properties compared to chiral molecules.

Purpose of the Study:

  • To review recent developments in chiral plasmonics, focusing on bottom-up fabrication approaches.
  • To explore the principles and applications of chiral plasmonic nanostructures.

Main Methods:

  • Review of plasmon-induced chirality from chiral molecule interactions.
  • Discussion of intrinsically chiral colloids with chiral shapes.
  • Analysis of plasmonic chirality from achiral particle arrangements.

Main Results:

  • Chiral plasmonic nanostructures demonstrate significantly larger optical chirality than natural molecules.
  • Bottom-up approaches allow for rational design, fabrication, and dynamic tuning of chiroptical responses.
  • Experimentally realized nanostructures outperform molecular systems in tailored chiroptical properties.

Conclusions:

  • Chiral plasmonic nanostructures are highly promising for real-world applications due to their enhanced optical chirality and engineerable responses.
  • The field is expected to grow, driving innovation in enantioselective analysis, chiral sensing, and disease biomarker detection.
  • Potential applications include in situ ultrasensitive detection and optical monitoring of biological processes.