Active Accumulation of Spherical Analytes on Plasmonic Hot Spots of Double-Bent Au Strip Arrays by Multiple Dip-Coating
| Autor: | Shinill Kang, Jung-Sub Wi, Do Won Hwang, Jinhyung Lee, Eun-Ah You |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Capillary action General Chemical Engineering Physics::Optics dip-coating 02 engineering and technology STRIPS 010402 general chemistry 01 natural sciences Dip-coating law.invention lcsh:Chemistry chemistry.chemical_compound localized surface plasmon resonance law exosome General Materials Science Surface plasmon resonance Plasmon business.industry Communication technology industry and agriculture 021001 nanoscience & nanotechnology 0104 chemical sciences Wavelength chemistry lcsh:QD1-999 Optoelectronics Polystyrene 0210 nano-technology business Biosensor capillary force |
| Zdroj: | Nanomaterials Nanomaterials, Vol 9, Iss 5, p 660 (2019) |
| ISSN: | 2079-4991 |
| Popis: | To achieve sensitive plasmonic biosensors, it is essential to develop an efficient method for concentrating analytes in hot spots, as well as to develop plasmonic nanostructures for concentrating light. In this study, target analytes were delivered to the surface of double-bent Au strip arrays by a multiple dip-coating method; they were self-aligned in the valleys between neighboring Au strips by capillary forces. As the valleys not only accommodate target analytes but also host strong electromagnetic fields due to the interaction between adjacent strips, sensitive measurement of target analytes was possible by monitoring changes in the wavelength of a localized surface plasmon resonance. Using the proposed plasmonic sensor and target delivery method, the adsorption and saturation of polystyrene beads 100 nm in size on the sensor surface were monitored by the shift of the resonance wavelength. In addition, the pH-dependent stability of exosomes accumulated on the sensor surface was successfully monitored by changing the pH from 7.4 to 4.0. |
| Databáze: | OpenAIRE |
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