Label-free optical sensing on hybrid plasmonic-nanobiosilica platforms

Fanghui Ren; Jeremy Campbell; Gregory L. Rorrer; Alan X. Wang

doi:10.1117/12.2042429

13 March 2014 Label-free optical sensing on hybrid plasmonic-nanobiosilica platforms

Fanghui Ren, Jeremy Campbell, Gregory L. Rorrer, Alan X. Wang

Proceedings Volume 8933, Frontiers in Biological Detection: From Nanosensors to Systems VI; 89330J (2014) https://doi.org/10.1117/12.2042429
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Diatoms are single-celled algaes that make photonic-crystal-like silica shells or frustules with hierarchical micro- and nano-scale features consisting of two-dimensional periodic pores. In this paper, we present an innovative label-free optical sensor based on a biological-plasmonic hybrid nanostructure by self-assembling silver (Ag) nanoparticles into diatom frustules. The photonic-crystal-like diatom frustules provide a spatially confined electric field with enhanced intensity that can form hybrid photonic-plasmonic modes through the optical coupling with Ag nanoparticles. The experimental results demonstrate 4-6x and 9-12x improvement of sensitivities to detect the Raman dye for resonance and nonresonance SERS sensing, respectively.

Citation Download Citation

Fanghui Ren, Jeremy Campbell, Gregory L. Rorrer, and Alan X. Wang "Label-free optical sensing on hybrid plasmonic-nanobiosilica platforms", Proc. SPIE 8933, Frontiers in Biological Detection: From Nanosensors to Systems VI, 89330J (13 March 2014); https://doi.org/10.1117/12.2042429

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