Transmission SPR of Gold Nanoslit Array and Ultrasensitive Detection of a Retinol Binding Protein

Autor: David H. Waldeck, Sameer Singhal, Jianjun Wei, Matthew J. Kofke
Rok vydání: 2010
Předmět:
Zdroj: 2010 4th International Conference on Bioinformatics and Biomedical Engineering.
ISSN: 2151-7614
DOI: 10.1109/icbbe.2010.5516093
Popis: Retinal-modified SAM-coated nanoslit array thin gold film was used for ultra-sensitive (picomolar) detection of a ligand protein (β-Lactoglobulin) with a transmission SPR mode. The transmission spectra of nanoslit arrays with varying periods were evaluated for nanostructure optimization with respect to primary peak position, shape and sensitivity. Sensitivity of this method, as measured in water, was estimated at 3 ng/mL, or approximately 130 picomolar. Additionally a monotonic shift in primary peak wavelength was observed with changing nanoslit periodicity. This type of in-plane nanoarray chip is currently being integrated with microfluidic platforms for chemical and/or biological sensing applications.
Databáze: OpenAIRE