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Updated: Apr 28, 2026

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Published on: May 8, 2015

Binary diamondoid building blocks for molecular gels.

Mengwen Zhang¹, Charles F Zukoski

¹Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.

Langmuir : the ACS Journal of Surfaces and Colloids

|June 6, 2014

Summary

This summary is machine-generated.

Diamondoid molecules, adamantane derivatives, form gels through van der Waals forces and hydrogen bonding. These novel colloidal gels exhibit unique mechanical properties and fiber-like structures.

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Area of Science:

Materials Science
Supramolecular Chemistry
Nanotechnology

Background:

Adamantane, a diamondoid molecule, possesses a unique cage structure.
Derivatization of adamantane can induce anisotropic interactions between nanoscopic particles.
Understanding self-assembly in diamondoid systems is crucial for novel material development.

Purpose of the Study:

To explore the gelation of paired adamantane systems.
To investigate the role of van der Waals forces and hydrogen bonding in adamantane gel formation.
To characterize the structural and mechanical properties of the resulting adamantane gels.

Main Methods:

Mixing solutions of 1-adamantanecarboxylic acid (A1C) and 1-adamantylamine (A1N) in dimethyl sulfoxide.
Observation of gel formation and precipitation at specific concentrations.
Measurement of elastic moduli and yield stress.
Analysis of gel structure using Transmission Electron Microscopy (TEM).

Main Results:

Gels formed rapidly upon mixing A1C and A1N solutions.
A space-filling gel observed at approximately 3% by weight.
Elastic moduli ranged from 10(2)-10(4) Pa in the 3-7 wt % concentration range.
At a 1:1 mol ratio, elastic modulus and yield stress increased with volume fraction, showing colloidal gel characteristics.
TEM revealed gels composed of interwoven, branched fibers formed from oriented aggregation of ~30 nm crystallites.

Conclusions:

Paired adamantane derivatives can form robust colloidal gels.
The gelation process is driven by van der Waals forces and hydrogen bonding.
The resulting gels possess tunable mechanical properties and a unique fiber-based microstructure.