Using the nanoimprint-in-metal method to prepare corrugated metal structures for plasmonic biosensors through both surface plasmon resonance and index-matching effects.
In this study, we prepared metallic corrugated structures for use as highly sensitive plasmonic sensors. Relying on the direct nanoimprint-in-metal method, fabrication of this metallic corrugated structure was readily achieved in a single step. The metallic corrugated structures were capable of sensing both surface plasmon resonance (SPR) wavelengths and index-matching effects. The corrugated Au films exhibited high sensitivity (ca. 800 nm/RIU), comparable with or even higher than those of other reported SPR-based sensors. Because of the unique index-matching effect, refractometric sensing could also be performed by measuring the transmission intensity of the Au/substrate SPR mode-conveniently, without a spectrometer. In the last, we demonstrated the corrugated Au film was capable of sensing biomolecules, revealing the ability of the structure to be a highly sensitive biosensor.
Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
Chen-Chieh
CC
Yu
Kuan-Hung
KH
Ho
Hsuen-Li
HL
Chen
Shang-Yu
SY
Chuang
Shao-Chin
SC
Tseng
Wei-Fang
WF
Su
D015374:Biosensing Techniques / Q000379:methods*; D006046:Gold / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*
D008670:Metals; D006046:Gold