Directed Assembly of Multi-Walled Nanotubes and Nanoribbons of Amino Acid Amphiphiles Using a Layer-by-Layer Approach

Kathrin Siegl, Luba Kolik-Shmuel, Mingming Zhang, Sylvain Prévost, Kalanit Vishnia, Amram Mor, Marie Sousai Appavou, Charl J. Jafta, Dganit Danino, Michael Gradzielski*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Monodisperse unilamellar nanotubes (NTs) and nanoribbons (NRs) were transformed to multilamellar NRs and NTs in a well-defined fashion. This was done by using a step-wise approach in which self-assembled cationic amino acid amphiphile (AAA) formed the initial NTs or NRs, and added polyanion produced an intermediate coating. Successive addition of cationic AAA formed a covering AAA layer, and by repeating this layer-by-layer (LBL) procedure, multi-walled nanotubes (mwNTs) and nanoribbons were formed. This process was structurally investigated by combining small-angle neutron scattering (SANS) and cryogenic-transmission electron microscopy (cryo-TEM), confirming the multilamellar structure and the precise layer spacing. In this way the controlled formation of multi-walled suprastructures was demonstrated in a simple and reproducible fashion, which allowed to control the charge on the surface of these 1D aggregates. This pathway to 1D colloidal materials is interesting for applications in life science and creating well-defined building blocks in nanotechnology.

Original languageEnglish
Pages (from-to)6904-6910
Number of pages7
JournalChemistry - A European Journal
Volume27
Issue number23
DOIs
StatePublished - 21 Apr 2021
Externally publishedYes

Keywords

  • amino acid amphiphiles
  • cryogenic transmission electron microscopy
  • layer-by-layer assembly
  • multilayer nanotubes
  • small-angle neutron scattering

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