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Related Experiment Video

Updated: Jul 8, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Helical rosette nanotubes with tunable chiroptical properties.

Hicham Fenniri1, Bo-Liang Deng, Alexander E Ribbe

  • 1Contribution from the 1393 H. C. Brown Chemistry Laboratory, Purdue University, West Lafayette, Indiana 47907-1393, USA. hf@purdue.edu

Journal of the American Chemical Society
|September 13, 2002
PubMed
Summary

Compound 1 self-assembles into rosette nanotubes. Chiral promoters like L-Ala induce helical structures, demonstrating autocatalysis and tunable chiroptical properties for advanced materials.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Hierarchical self-assembly is crucial for creating complex nanostructures.
  • Controlling the chirality of self-assembled materials is essential for advanced applications.

Purpose of the Study:

  • To investigate the self-assembly of compound 1 into rosette nanotubes.
  • To explore the induction of chirality in these nanotubes using chiral promoters.
  • To understand the kinetics and mechanisms of chiral induction and self-assembly.

Main Methods:

  • Transmission Electron Microscopy (TEM)
  • Dynamic Light Scattering (DLS)
  • Small-Angle X-ray Scattering (SAXS)
  • Circular Dichroism (CD) spectroscopy

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Related Experiment Videos

Last Updated: Jul 8, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence
07:03

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

Published on: June 13, 2020

Main Results:

  • Compound 1 self-assembles into rosette nanotubes (approx. 4 nm diameter) at high concentrations (>1 mM).
  • Chiral amino acid promoters (e.g., L-Ala) induce helical structures with predefined helicities via electrostatic interactions.
  • Both high and low concentration pathways exhibit autocatalysis, where nanotubes promote their own formation.
  • Chiral induction is concentration-dependent, follows an all-or-none response, and is influenced by promoter structure.

Conclusions:

  • Supramolecular pathways enable efficient preparation of helical rosette nanotubes with tunable chiroptical properties.
  • The process allows expression of molecular promoter properties at the macromolecular level.
  • This work provides insights into controlled self-assembly and chiral induction for novel materials.