POS3-0740

Molecular Sensing on Curved Surfaces Enabled by Shape-Memory Nanogaps

When and Where

Nov 30, -0001

12:00am - 12:00am

Presenter(s)

Goum Min (Seoul National University)

Co-Author(s)

Jinsoo Na (Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea), Yugyeong Kang (Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea), Siheon Lee (Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea), Byounghyun Jeon (Nano Lithography and Manufacturing Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea), Hanjae Kim (Nano Lithography and Manufacturing Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea), Hyunjun Lee (Department of Organic and Nano Engineering, Human-Tech Convergence Program, Hanyang University, Seoul, Republic of Korea.), Beomsoo Chun (Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, Republic of Korea.), Soojeong Yim (Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, Republic of Korea.), Jeonghun Kwak (Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, Republic of Korea.), YounghoEom (Department of Organic and Nano Engineering, Human-Tech Convergence Program, Hanyang University, Seoul, Republic of Korea.), Chang Yeol Lee (Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea.), Soon Hyoung Hwang (Nano Lithography and Manufacturing Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea), Juhyuk Park (Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea)

Abstract

Flexible surface-enhanced Raman scattering (SERS) substrates enable direct molecular analysis on irregular surfaces, making them valuable for food safety and bio-signal detection. However, most conventional SERS substrates suffer from structural damage after repeated use and require complex fabrication processes, limiting their practical utility. This study presents a nanostructured composite film with uniformly dispersed nanoparticles embedded in an aligned nanopillar array of a shape-memory polymer matrix. Compression and photothermal recovery of the nanopillar array allow the substrate to switch between different nanogap states, enabling conformal contact with curved surfaces and size-adaptive molecular sensing. Raman analysis confirmed strong signal enhancement and reliable detection of residual chemicals on curved surfaces, demonstrating the potential of this system as a high-performance, reusable SERS platform for smart chemical monitoring.

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