Graphene-Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing

• Published in: Advanced materials (Weinheim) Vol. 27; no. 40; pp. 6163 - 6169
• Main Authors: Zeng, Shuwen, Sreekanth, Kandammathe Valiyaveedu, Shang, Jingzhi, Yu, Ting, Chen, Chih-Kuang, Yin, Feng, Baillargeat, Dominique, Coquet, Philippe, Ho, Ho-Pui, Kabashin, Andrei V., Yong, Ken-Tye
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.10.2015; Wiley-VCH Verlag
• Subjects: Architecture; Binding energy; biosensors; Confinement; Deoxyribonucleic acid; DNA, Single-Stranded - analysis; Electromagnetic Phenomena; Engineering Sciences; Gain; Gold - chemistry; Graphite - chemistry; metasurfaces; Micro and nanotechnologies; Microelectronics; plasmonic sensing; Plasmonics; Singularities; surface plasmon polaritons; Surface Plasmon Resonance; Surface Properties; plasmonic sensing; biosensors; surface plasmon polaritons; metasurfaces
• ISSN: 0935-9648; 1521-4095; 1521-4095
• DOI: 10.1002/adma.201501754

Graphene–gold metasurface architectures that can provide significant gains in plasmonic detection sensitivity for trace‐amount target analytes are reported. Benefiting from extreme phase singularities of reflected light induced by strong plasmon‐mediated energy confinements, the metasurface demonstrates a much‐improved sensitivity to molecular bindings nearby and achieves an ultralow detection limit of 1 × 10−18 m for 7.3 kDa 24‐mer single‐stranded DNA.