Poly(4-vinylpyridine) 박막의 특성 연구 및 응용

Abstract

Polymer immobilization on solid substrates is a fast and intensively developing technique for several applications that include imaging and semi-conductor industries. Immobilized polymers exhibit a variety of properties useful for such applications. In this regards, a variety of polymer molecules have been studied. Amongst the polymers studied, poly(4-vinylpyridine) (P4VP)is a chiefly studied polymer because of its outstanding properties and its use as a universal surface modifier. In the present study, UV cross-linked P4VP has been utilized in studying the patterning of immobilized polymer thin films by photo-lithographic technique as well as these immobilized films were used as model templates to further modification with various metal nanoparticles, especially gold owing to its biological importance. Also, bimodal metal nanoparticles substrates were prepared using a bifunctional cross-linker namely 1,6-hexanedithiol. Studies on pH responsive P4VP polymer films were done. The preliminary results indicate that this methodology is useful in preparing pH nanosensors. The variation of SPR of the immobilized nanoparticles with a change in interparticles distances are caused by the swelling/de-swelling behaviour of the pH responsive polymer films. The prepared samples in all the above cases were analytically well characterized. Several microscopic techniques, such as force microscopy and field-emission scanning electron microscopy were employed for analyzing the morphologies of the samples.