+ (1 - The Hong Kong Polytechnic University

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+ (1 - The Hong Kong Polytechnic University

Spatial Patterning of the β-Phase Conformation

• Masked solvent vapour exposure:

Spectrosil

PDMS

Spectrosil

Toluene vapour

Glassy PFO film (d ≈ 200 nm)

β-phase PFO

• Simple structures: Image patterns using PL contrast (red shifted β-phase)

Passive:

Active:

Buried

Grating

β-phase

PFO

Spectrosil

PFO

Spectrosil

G. Ryu, P.N. Stavrinou, D.D.C. Bradley, Adv.Funct.Mater. (2009), 3237-3242.