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Prochirality

Prochirality

The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...

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Related Experiment Video

Updated: May 10, 2026

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

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

Published on: March 5, 2019

Large-area 3D chiral plasmonic structures.

Bettina Frank¹, Xinghui Yin, Martin Schäferling

¹4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.

|June 29, 2013

Summary

This summary is machine-generated.

We developed a low-cost method to create large chiral plasmonic nanostructures using colloidal nanohole lithography. These structures exhibit strong chiroptical resonances, useful for developing sensitive enantiomer sensors.

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Last Updated: May 10, 2026

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Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

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Published on: September 2, 2017

Area of Science:

Plasmonics
Nanotechnology
Chirality

Background:

Chiral plasmonic structures are crucial for advanced optical applications.
Existing fabrication methods are often complex and costly.
Large-area fabrication of 3D chiral nanostructures remains a challenge.

Purpose of the Study:

To develop a scalable and cost-effective method for manufacturing large-area 3D chiral plasmonic structures.
To investigate the chiroptical properties of the fabricated nanostructures.
To explore their potential for applications in stereochemical sensing.

Main Methods:

Utilized colloidal nanohole lithography for large-area fabrication.
Controlled sample rotation during gold evaporation to create spiral-type ramp nanostructures.
Characterized optical properties, focusing on chiroptical resonances.

Main Results:

Successfully fabricated cm(2)-sized plasmonic structures with 3D chirality.
Observed chiroptical resonances in the 100–400 THz frequency range (750–3000 nm).
Achieved circular dichroism values as high as 13%.

Conclusions:

Colloidal nanohole lithography provides a simple, low-cost route to large-area chiral plasmonic templates.
The fabricated nanostructures exhibit significant chiroptical activity.
These templates are promising for developing highly sensitive stereochemical enantiomer sensors.