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- W4281700998 abstract "Surface-enhanced Raman scattering (SERS) is an attractive technique for studying trace detection. It is of utmost importance to further improve the performance and understand the underlying mechanisms. An ionic liquid (IL), the anion of which is derived from biomass, [P6,6,6,14][FuA] was synthesized and used as a trace additive to improve the SERS performance of cytochrome c (Cyt c) on TiO2 nanotube arrays (TNAs). An increased and better enhancement factor (EF) by four to five times as compared to the system without an IL was obtained, which is better than that from using the choline-based amino acid IL previously reported by us. Dissociation of the ILs improved the ionic conductivity of the system, and the long hydrophobic tails of the [P6,6,6,14]+ cation contributed to a strong electrostatic interaction between Cyt c and the TNA surface, thereby enhancing the SERS performance. Atomic force microscopy did verify strong electrostatic interactions between the Cyt c molecules and TNAs after the addition of the IL. This work demonstrates the importance of introducing the phosphonium-based IL to enhance the SERS performance, which will stimulate further development of more effective ILs on SERS detection and other relevant applications in biology." @default.
- W4281700998 created "2022-06-13" @default.
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- W4281700998 date "2022-06-01" @default.
- W4281700998 modified "2023-10-06" @default.
- W4281700998 title "Phosphonium-Based Ionic Liquid Significantly Enhances SERS of Cytochrome <i>c</i> on TiO<sub>2</sub> Nanotube Arrays" @default.
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- W4281700998 doi "https://doi.org/10.1021/acsami.2c05781" @default.
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