SERS substrates based on polymer-protected self-assembled plasmonic films with gold nanoparticles as enhancing element of a microfluidic sensor

Maleeva, Ksenia; Dadadzhanov, Daler; Palekhova, Alena; Kaliya, Ilia; Tkach, Anton; Baranov, Alexander; Bogdanov, Kirill

doi:10.1016/j.optmat.2023.114581

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…One notable approach involves combining plasmonic nanoparticles with polymers, resulting in the development of plasmonic-polymer nanocomposites and hybrid plasmonic nanostructures [17][18][19][20]. The goal of this combination is to obtain novel materials and devices with enhanced functionality and responsiveness [21][22][23]. The synergistic effects of these hybrid nanostructured materials can be leveraged in functional systems, endowing them with remarkable optoelectronic, sensing, catalytic, and antibacterial properties, as well as improved light harvesting efficiency [17,18,[24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles’ Localized Surface Plasmon Resonances Emerged in Polymeric Environments: Theory and Experiment

Tsarmpopoulou,

Ntemogiannis,

Stamatelatos

et al. 2024

Micro

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Considering that the plasmonic properties of metallic nanoparticles (NPs) are strongly influenced by their dielectric environment, comprehension and manipulation of this interplay are crucial for the design and optimization of functional plasmonic systems. In this study, the plasmonic behavior of silver nanoparticles encapsulated in diverse copolymer dielectric environments was investigated, focusing on the analysis of the emerging localized surface plasmon resonances (LSPRs) through both experimental and theoretical approaches. Specifically, two series of nanostructured silver ultrathin films were deposited via magnetron sputtering on heated Corning Glass substrates at 330 °C and 420 °C, respectively, resulting in the formation of self-assembled NPs of various sizes and distributions. Subsequently, three different polymeric layers were spin-coated on top of the silver NPs. Optical and structural characterization were carried out by means of UV–Vis spectroscopy and atomic force microscopy, respectively. Rigorous Coupled Wave Analysis (RCWA) was employed to study the LSPRs theoretically. The polymeric environment consistently induced a red shift as well as various alterations in the LSPR amplitude, suggesting the potential tunability of the system.

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Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles’ Localized Surface Plasmon Resonances Emerged in Polymeric Environments: Theory and Experiment

Tsarmpopoulou,

Ntemogiannis,

Stamatelatos

et al. 2024

Micro

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Self-Assembled Gold Nanoparticles as Reusable SERS Substrates for Polyphenolic Compound Detection

Pavlova,

Maleeva,

Moskalenko

et al. 2024

IJMS

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Natural polyphenolic compounds play a pivotal role in biological processes and exhibit notable antioxidant activity. Among these compounds, chlorogenic acid stands out as one of the most widespread and important polyphenols. The accurate detection of chlorogenic acid is crucial for ensuring the quality and classification of the raw materials used in its extraction, as well as the final products in the food, pharmaceutical, and cosmetics industries that contain this bioactive compound. Raman spectroscopy emerges as a powerful analytical tool, particularly in field applications, due to its versatility and sensitivity, offering both qualitative and quantitative analyses. By using the self-assembly of gold nanoparticles at liquid–liquid interfaces and the developed “aqua-print” process, we propose a facile and inexpensive route to fabricate enhanced substrates for surface-enhanced Raman spectroscopy with high reproducibility. To ensure substrate reliability and accurate molecule detection in SERS experiments, a benchmarking procedure was developed. This process involved the use of non-resonant rhodamine 6G dye in the absence of charge transfer and was applied to all synthesized nanoparticles and fabricated substrates. The latter revealed the highest enhancement factor of 4 × 104 for 72 nm gold nanoparticles among nanoparticle diameters ranging from 14 to 99 nm. Furthermore, the enhanced substrate was implemented in the detection of chlorogenic acid with a concentration range from 10 μM to 350 μM, demonstrating high accuracy (R2 > 99%). Raman mapping was employed to validate the good uniformity of the signal (the standard deviation was below 15%). The findings of this study were also supported by DFT calculations of the theoretical Raman spectra, demonstrating the formation of the chlorogenic acid dimer. The proposed method is strategically important for the development of the class of in-field methods to detect polyphenolic compounds in raw materials such as plants, extracted plant proteins, and polyphenolic compounds.

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SERS substrates based on polymer-protected self-assembled plasmonic films with gold nanoparticles as enhancing element of a microfluidic sensor

Cited by 2 publications

References 43 publications

Silver Nanoparticles’ Localized Surface Plasmon Resonances Emerged in Polymeric Environments: Theory and Experiment

Silver Nanoparticles’ Localized Surface Plasmon Resonances Emerged in Polymeric Environments: Theory and Experiment

Self-Assembled Gold Nanoparticles as Reusable SERS Substrates for Polyphenolic Compound Detection

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