[20p-PA2-1~35] 12.3 Functional Materials and Novel Devices

▲ [20p-PA2-15] Formation of miniature polymeric surface plasmon sensor chip using confined sessile drop technique

〇(P)Supeera Nootchanat¹, Wisansaya Jaikeandee^1,2, Patrawadee Yaiwong^3,1, Chutiparn Lertvachirapaiboon¹, Kazunari Shinbo¹, Keizo Kato¹, Sanong Ekgasit², Akira Baba¹ (1.Niigata University, 2.Chulalongkorn University, 3.Chiang Mai University)

Keywords:surface plasmon resonance, photopolymer, biosensor

In this work, we present a versatile method to fabricate a miniature surface plasmon resonance (SPR) sensor chip using confined sessile drop technique. The liquid photopolymer (NOA 61) was dropped on a circular polydimethylsiloxane (PDMS) substrates. Under equilibrium contention, hemispherical droplets were formed due to liquid spreading resistance at the edge of the substrate defined by Gibbs inequality equation. After UV curing, the hemispherical optical prism was obtained. Miniature SPR sensor chips with Kretschmann configuration could be achieved by the deposition of a gold film with the thickness of 50 nm on the flat surface of the obtained prism. The fabricated miniature SPR sensor chip was then mounted on a 3D-printed flow cell to complete the sensor module.