High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Lin, Hsin-Yi; Hung, Guan-Yi; Tu, Chi‐Shun; Liu, Tingyu; Hong, Chao‐Chi; Yu, Guoyu; Hsu, Jin–Cherng

doi:10.20944/preprints202208.0034.v1

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…Various techniques such as lithography (Liu et al 2017), chemical vapor deposition (Ayhan 2021), magnetron sputtering (Wu et al 2022), electrochemical deposition (Xia et al 2016), and nanoparticle adsorption on substrate followed by synthesis of plasmonic material by wet chemical methods (Fortuni et al 2017) are employed to fabricate SERS substrate. The SERS substrate fabricated with PVD and CVD techniques possesses high sensitivity, reproducibility, and scalability.…”

Section: Sers Activity Mainly Depends On Electromagnetic (Em) and Che...mentioning

confidence: 99%

Green synthesized Ag/rGO embedded flexible cotton SERS substrate for detection of methylene blue

Gokulakrishnan

Sekhar

Kamakshi

2023

Preprint

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Ag/rGO nanocomposite SERS substrates are widely used for the detection of contaminations in water and food adulterants. In this work, we prosed a novel green route to synthesize Ag/rGO nanocomposite for SERS-based detection of methylene blue (MB). Ag/rGO nanocomposite is synthesized by simultaneous reduction of AgNO3 and GO with the leaf extract of Jasmine fluminense. Further, the flexible SERS substrate is fabricated by directly coating the synthesized Ag/rGO nanocomposite on cotton fabric and used for SERS-based detection of MB. The SERS studies on MB show a linear response of 0.97 over a wide detection range of 10− 3 to 10− 9 M with a minimum detection limit of 10− 9 M. The enhancement factor for MB at a concentration of 10− 9 M is 5.33 × 105 with a high signal-to-noise ratio of 31.69. This study emphasizes the potential of green synthesized Ag/rGO embedded flexible cotton SERS substrate for the traceable fingerprint detection of MB.

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Section: Sers Activity Mainly Depends On Electromagnetic (Em) and Che...mentioning

confidence: 99%

Green synthesized Ag/rGO embedded flexible cotton SERS substrate for detection of methylene blue

Gokulakrishnan

Sekhar

Kamakshi

2023

Preprint

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Black Silicon Surface-Enhanced Raman Spectroscopy Biosensors: Current Advances and Prospects

Padrez,

Golubewa

2024

Biosensors

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Black silicon was discovered by accident and considered an undesirable by-product of the silicon industry. A highly modified surface, consisting of pyramids, needles, holes, pillars, etc., provides high light absorption from the UV to the NIR range and gives black silicon its color—matte black. Although black silicon has already attracted some interest as a promising material for sensitive sensors, the potential of this material has not yet been fully exploited. Over the past three decades, black silicon has been actively introduced as a substrate for surface-enhanced Raman spectroscopy (SERS)—a molecule-specific vibrational spectroscopy technique—and successful proof-of-concept experiments have been conducted. This review focuses on the current progress in black silicon SERS biosensor fabrication, the recent advances in the design of the surface morphology and an analysis of the relation of surface micro-structuring and SERS efficiency and sensitivity. Much attention is paid to problems of non-invasiveness of the technique and biocompatibility of black silicon, its advantages over other SERS biosensors, cost-effectiveness and reproducibility, as well as the expansion of black silicon applications. The question of existing limitations and ways to overcome them is also addressed.

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Three Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopy

2023

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The fabrication technology of surface nanocomposites based on hexagonally ordered gold nanoparticle (AuNP) layers (quasi-arrays) and their possible application as surface-enhanced Raman spectroscopy (SERS) substrates are presented in this paper. The nanoparticle layers are prepared using a nanotextured template formed by porous anodic alumina (PAA) and combined with gold thin-film deposition and subsequent solid-state dewetting. Three types of hexagonal arrangements were prepared with different D/D0 values (where D is the interparticle gap, and D0 is the diameter of the ellipsoidal particles) on a large surface area (~cm2 range), namely, 0.65 ± 0.12, 0.33 ± 0.10 and 0.21 ± 0.09. The transfer of the particle arrangements to transparent substrates was optimized through three generations, and the advantages and disadvantages of each transfer technology are discussed in detail. Such densely packed nanoparticle arrangements with high hot-spot density and tunable interparticle gaps are very beneficial for SERS applications, as demonstrated with two practical examples. The substrate-based enhancement factor of the nanocomposites was determined experimentally using a DNA monolayer and was found to be between 4 × 104 and 2 × 106 for the different particle arrangements. We also determined the sensing characteristics of a small dye molecule, rhodamine 6G (R6G). By optimizing the experimental conditions (e.g., optimizing the laser power and the refractive index of the measurement medium with an ethylene-glycol/water mixture), concentrations as low as 10−16 M could be detected at 633 nm excitation.

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High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Cited by 5 publications

References 26 publications

Green synthesized Ag/rGO embedded flexible cotton SERS substrate for detection of methylene blue

Green synthesized Ag/rGO embedded flexible cotton SERS substrate for detection of methylene blue

Black Silicon Surface-Enhanced Raman Spectroscopy Biosensors: Current Advances and Prospects

Three Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopy

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