<Abstrate>

Herein, we report a straightforward technique for the creation of

nanoporous polystyrene (PS) films. By preparing PS blend samples

with M_ws of 600 000 and 600 g mol⁻¹ followed by rinsing with

n-heptane, the low M_w component was dissolved and removed to

afford a low-density network of high M_w PS. Nanoscale pores are

formed as a result of the miscibility and stability of the initial state.

The resulting materials were characterized using ellipsometry,

atomic force microscopy and scanning electron microscopy.

Materials with an effective refractive index as low as 1.1 can be

prepared using this approach. The effects of varying the size of the

low M_w polymer and the application of low friction surfaces

prepared with the nanoporous samples were investigated.

<全文連結>