6533b828fe1ef96bd1288285
RESEARCH PRODUCT
Polymer, Metal, and Hybrid Nano- and Mesotubes by Coating Degradable Polymer Template Fibers (TUFT Process)
Michael BognitzkiAndreas K. SchaperHaoqing HouHaoqing HouChristoph SchwarteJoachim H. WendorffThomas FreseMichael HellwigAndreas GreinerAndreas GreinerMichael Ishaquesubject
chemistry.chemical_classificationMaterials sciencePrecipitation (chemistry)Mechanical EngineeringPolymerengineering.materialMicelleHexaneSolventchemistry.chemical_compoundchemistryCoatingNanocrystalChemical engineeringMechanics of MaterialsPolymer chemistryengineeringGeneral Materials ScienceAlkyldescription
). Selective reaction with the silver atoms at the interface of the particles occurred and the coated particles were then extracted from reverse micelles. The powder of coated nanocrystals thus obtained was then dispersed in hexane, giving an optically clear solution. The size distribution was still rather large (30 %), and to reduce it a size-selected precipitation process [20] was used. In this process two solvents, such as hexane and pyridine, are mixed. The first is a good solvent and the second a poor solvent for the alkyl chains. With this solvent mixture, the larger coated particles flocculated whereas the smaller ones remain in the solution, thus providing size selection. By repeating this process several times, a homogenous clear colloidal solution of dispersed 4.3 nm nanocrystals is obtained. The concentration of nanocrystals with final size distribution around 13 % was controlled.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-05-01 | Advanced Materials |