Identification of Low Concentrations of Flucytosine Drug Using a Surface-Enhanced Raman Scattering (SERS)-Active Filter Paper Substrate

Karooby, Elaheh; Sahbafar, Hossein; Heris, Masoud Hakimi; Hadi, Amin; Eskandari, Vahid

doi:10.1007/s11468-023-02042-1

Cited by 7 publications

(1 citation statement)

References 48 publications

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“…The substrate’s geometry, particularly the surface localization of nanostructures, is crucial for sustaining strong surface plasmon resonance (SPR), and the surface chemistry of these nanostructures significantly influences the intensity of SPR peaks [ 11 , 12 , 13 , 14 , 15 ]. At present, combining semiconductor nanostructures with noble metal nanoparticles, known as metal–semiconductor heterostructures, offers a promising approach to creating three-dimensional (3D) LSPR structures to enhance SERS substrates’ detection sensitivity and uniformity [ 16 , 17 , 18 , 19 , 20 , 21 ]. These heterostructures can serve as recyclable SERS substrates through the photocatalytic degradation of target molecules under UV light irradiation and facilitate charge transfer pathways for Raman scattering enhancement [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Na2Ti3O7@RF@Ag Heterostructures as Efficient Substrates for SERS and Photocatalytic Applications

Chang,

Lin,

Chin

et al. 2023

Molecules

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A multi-step procedure was effectively employed to synthesize innovative three-dimensional (3D) heterostructures encompassing sodium titanate (Na2Ti3O7) nanowire cores, an intermediate resorcinol–formaldehyde (RF) layer, and outer silver (Ag) nanoparticle sheaths, referred to as Na2Ti3O7@RF@Ag heterostructures. Initially, a one-step hydrothermal technique facilitated the direct growth of single-crystal Na2Ti3O7 nanowires onto a flexible Ti foil. Subsequently, a two-step wet chemical process facilitated the sequential deposition of an RF layer and Ag nanoparticles onto the Na2Ti3O7 nanowires at a low reaction temperature. Optimal concentrations of silver nitrate and L-ascorbic acid can lead to the cultivation of Na2Ti3O7@RF@Ag heterostructures exhibiting heightened surface-enhanced Raman scattering (SERS), which is particularly beneficial for the detection of rhodamine B (RhB) molecules. This phenomenon can be ascribed to the distinctive geometry of the Na2Ti3O7@RF@Ag heterostructures, which offer an increased number of hot spots and surface-active sites, thereby showcasing notable SERS enhancement, commendable reproducibility, and enduring stability over the long term. Furthermore, the Na2Ti3O7@RF@Ag heterostructures demonstrate remarkable follow-up as first-order chemical kinetic and recyclable photocatalysts for the photodecomposition of an RhB solution under UV light irradiation. This result can be attributed to the enhanced inhibition of electron–hole pair recombination and increased surface-active sites.

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