×
![]( "Buchcover ISBN 9783937672601")
Nanotemplates via selfassembly of diblock copolymers and their metallisation
von Amir FahmiSelf-assembly is a powerful route to the fabrication of nanostructures. The ability of soft materials such as block copolymer to form a microphase separation can create a rich variety of nanoscale periodic patterns. This offers the potential to fabricate high-density arrays for use in data storage, electronics, molecular separation and for combinatorial chemistry and DNA screening.
The current work is devoted to the formation of three different nanotemplates using block copolymers PS-b-P4VP hydrogen-bonded with amphiphile PDP. Macroscopic orientation of the supramolecular polymeric complex has been achieved by large amplitude oscillatory shear (LAOS). Then a suitable solvent was used to extract the amphiphile. Three different nanotemplates were providing nanotubes, nanosheets and nanowires to pattern other materials (conducting and semiconducting).
In this work the diblock copolymer PS-b-P4VP was used to prepare CdSe nanoparticles. The organic matrix served as a medium to constrain the particles size as well as to stabilise them. The resulting arrangement on Si-wafer was a core-shell structure of CdSe with a P4VP-b-PS corona. Thermal treatment of PS-b-P4VP(CdSe) in thin films on Si-wafers induced the growth of CdSe wires in micro- and nanometers scales. Also CdSe nanoparticles stabilised via PS-b-P4VP could be shown to form highly symmetric nanodiscs and nanoring structures by using Langmuir-Blodgett (LB) techniques.
The current work is devoted to the formation of three different nanotemplates using block copolymers PS-b-P4VP hydrogen-bonded with amphiphile PDP. Macroscopic orientation of the supramolecular polymeric complex has been achieved by large amplitude oscillatory shear (LAOS). Then a suitable solvent was used to extract the amphiphile. Three different nanotemplates were providing nanotubes, nanosheets and nanowires to pattern other materials (conducting and semiconducting).
In this work the diblock copolymer PS-b-P4VP was used to prepare CdSe nanoparticles. The organic matrix served as a medium to constrain the particles size as well as to stabilise them. The resulting arrangement on Si-wafer was a core-shell structure of CdSe with a P4VP-b-PS corona. Thermal treatment of PS-b-P4VP(CdSe) in thin films on Si-wafers induced the growth of CdSe wires in micro- and nanometers scales. Also CdSe nanoparticles stabilised via PS-b-P4VP could be shown to form highly symmetric nanodiscs and nanoring structures by using Langmuir-Blodgett (LB) techniques.