COLL 153 |
| Xi Zhang, Department of Chemistry, Tsinghua University, and Key Lab for Supramolecular Structure and Materials, Jilin University, Beijing 100084, China, Mingfeng Wang, Key Lab for Supramolecular Structure and Materials, Jilin University, Changchun, 130023, China, and Zhiqiang Wang, Department of Chemistry, Tsinghua University, Beijing 100084, China. |
| Supramolecular self-assembly confined to interfaces has attracted increasing interest from chemistry, physics and biology. Conventional surfactants can self-assemble into various micellar structures at the solid-liquid interface. Such surface micelles are dynamic and fluid, however, hence lacking the robustness required for detailed characterization of their supramolecular structure and further chemical/physical fabrication. We have been focusing on stabilizing surface micelles of mesogen-bearing bolaform amphiphiles with two hydrophilic moieties connected by a hydrophobic chain. Atomic force microscopy studies showed that both the micellar structures and stability could be controlled at interface by the types of mesogenic groups, the lengths of spacer alkyl chains, as well as environmental conditions such as solution concentration, ionic strength, substrate, etc. The robust surface micelles with well-defined domain sizes and shapes on the nanometer scale are promising templates for the synthesis of functional nanomaterials and the fabrication of nanoarchitectures through an engineering-up approach. |
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Symposium in Memory of Arthur W. Adamson
2:00 PM-5:40 PM, Monday, March 29, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |