Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Nanoscale Patterning of Barium Titanate on Block Tu Lee,, Nan Yao, and Ilhan A. Aksay*,,
 

Summary: Nanoscale Patterning of Barium Titanate on Block
Copolymers
Tu Lee,, Nan Yao, and Ilhan A. Aksay*,,
Department of Chemical Engineering and Princeton Materials Institute, Princeton University,
Princeton, New Jersey 08544-5211
Received August 6, 1996. In Final Form: April 9, 1997X
A triblock copolymer of polystyrene-polybutadiene-polystyrene (Kraton D1102) has been used to pattern
barium titanate precursor with nanoscale modulations. The copolymer self-assembles to yield cylindrical
polystyrene nanodomains in a polybutadiene matrix. The preorganized thin films of polymer are then
selectively OH-functionalized in situ on the unsaturated carbon bonds in the polybutadiene matrix with
antistereochemistry. Anchoring the barium titanate precursor onto the hydroxylated polymer thin films
is possible only in the trans-1,2 polybutadiol matrix through the condensation between the barium titanium
double alkoxides and the hydroxyl groups. The regioselective deposition of the barium titanium double
alkoxides on the original polybutadiene matrix of the Kraton thin films was verified by transmission
electron microscopy and electron energy loss spectroscopy. The spacing of the coordinated barium titanium
double alkoxide pattern was 23 nm, equivalent to the interdomain spacing of the original polybutadiene
matrix.
Introduction
The length scales defining structure and organization
determine the fundamental characteristics of a material.

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science