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Updated: Dec 14, 2025

Generation of Scalable, Metallic High-Aspect Ratio Nanocomposites in a Biological Liquid Medium

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Published on: July 8, 2015

Ammonium lithocholate nanotubes: stability and copper metallization.

Pierre Terech¹, Neralagatta M Sangeetha², Shreedhar Bhat²

¹UMR5819 CEA-CNRS-Univ. J. Fourier, DRFMC-SI3M, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France. pierre.terech@cea.fr.

|July 19, 2020

Summary

This summary is machine-generated.

Ammonium lithocholate nanotubes (NHLC) were successfully replicated into copper rods using a metallic coating method. Acidic conditions were found to stabilize these self-assembled structures for replication.

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Area of Science:

Materials Science
Nanotechnology
Supramolecular Chemistry

Background:

Ammonium lithocholate nanotubes (NHLC) are self-assembled nanostructures with potential applications.
Replication of nanostructures is crucial for fabricating nanoscale devices.
Understanding the stability of NHLC in different conditions is essential for their use.

Purpose of the Study:

To prepare and characterize ammonium lithocholate nanotubes (NHLC).
To investigate the metallic replication of NHLC using an electroless method.
To analyze the stability and behavior of NHLC in acidic conditions for replication.

Main Methods:

Preparation of NHLC in alkaline ammonia solutions.
Electroless metallic (copper) replication of NHLC coated with poly(ethylene-imine).
Cryo-transmission electron microscopy (cryo-TEM) and scanning electron microscopy (SEM) for characterization.
Dynamic light scattering (DLS) and optical observations for stability analysis.

Main Results:

NHLC nanotubes with monodisperse dimensions (52 nm external diameter) were prepared.
Successful metallic replication yielded copper rods (∼ 80 nm external diameter) corresponding to NHLC templates.
Acidic conditions (hydrochloric acid) were found to stabilize NHLC suspensions and disperse bundles, enabling replication.
An average apparent diffusion coefficient of NHLC assemblies was determined to be ∼ 9.8 × 10 nm²/s.

Conclusions:

NHLC nanotubes can be effectively replicated into metallic nanostructures.
Controlled acidic conditions enhance the stability and dispersibility of NHLC for replication processes.
The study demonstrates a viable method for fabricating metallic nanostructures templated by NHLC.