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Issue 35, 2009
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Self-assembly and aggregation of melamine and melamine–uric/cyanuric acid investigated by STM and AFM on solid surfaces

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Abstract

The self-assembly and aggregation of melamine (M), and a mixture of melamine with uric/cyanuric acid (UA/CA) are investigated by performing scanning tunneling microscopy (STM) and atomic force microscopy (AFM) on graphite and mica surfaces at room temperature. Two-dimensional (2D) porous molecular networks and disordered adlayers are found, respectively, in the M and UA–M assembly on graphite. Uniformly dispersed nanoparticles of M and UA–M are found at various concentrations by AFM. Owing to complementary NH⋯O and NH⋯N hydrogen bonds, the CA–M mixture forms 2D densely packed adlayers and nanoscale crystals on graphite and aggregates into three-dimensional (3D) clusters on the surfaces. The size of the cluster is dependent on the molecular concentration. The results provide important information for the self-assembly of triazine compounds and are significant in the study of kidney disease related to melamine.

Graphical abstract: Self-assembly and aggregation of melamine and melamine–uric/cyanuric acid investigated by STM and AFM on solid surfaces

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Article information


Submitted
14 Apr 2009
Accepted
27 May 2009
First published
24 Jun 2009

Phys. Chem. Chem. Phys., 2009,11, 7708-7712
Article type
Paper

Self-assembly and aggregation of melamine and melamine–uric/cyanuric acid investigated by STM and AFM on solid surfaces

X. Zhang, T. Chen, Q. Chen, L. Wang and L. Wan, Phys. Chem. Chem. Phys., 2009, 11, 7708
DOI: 10.1039/B907557G

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