Artificial homo- and co-polymeric polyvinylnucleobases with a polyvinyl backbone mimic native RNA, show the ability to hybridize to their complementary native nucleic acid strands, forming so-called more nuclease-resistant "semiplastic" double- and triple-stranded RNA analogues (1-3).

Physico-chemical investigations of these via thiol-gold linkage or by silylation procedure surface immobilized biologically active compounds show formation of uniform layers of molecules. The presented results of their chemical chain extensions allow us to propose new applications of "semiplastic" RNAs in the field of biochemical analysis and nucleic acid drugs.