Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 11, Issue 35, Pages 7708-7712Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b907557g
Keywords
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Funding
- National Natural Science Foundation of China [20673121, 20733004, 20821003]
- National Key Project on Basic Research [2006CB806100, 2006CB932100]
- Chinese Academy of Sciences
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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 center dot center dot center dot O and NH center dot center dot center dot 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.
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