Comparative Analysis of SERS Substrates of Different Morphology

Rigó, István; Vereš, M.; Himics, L.; Tóth, S.; Czitrovszky, A.; Nagy, Attila; Fürjes, Péter

doi:10.1016/j.proeng.2016.11.131

Cited by 13 publications

(7 citation statements)

References 3 publications

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“…In fact, the high curvature surface, irregular surface and sharper edges exhibit a great enhancement of the Raman scattering by generating a local high electromagnetic field enhancement, demonstrating the importance of metal nanoparticles synthesis [11,12,16,17]. In this sense, silver nanostars, nanocubes, prisms, or nanoparticles with defects have demonstrated high sensitivity and high enhancement of the Raman signals showing higher potential, with respect to spherical nanoparticles with the same dimensions [12,[18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

SERS Activity of Silver Nanosphere, Triangular Nanoplates, Hexagonal Nanoplates and Quasi-Spherical Nanoparticles: Effect of Shape and Morphology

2020

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In this work, we prepared different morphologies of silver nanoparticles: nanosphere, triangular nanoplates, hexagonal nanoplates, and quasi-spherical shapes, through one-step synthesis. Hydrogen peroxide was used as the oxidizing agent during the reduction of silver nitrate by sodium borohydride, in the presence of tri-sodium citrate and poly-vinyl-pyrrolidone. The obtained silver nanoparticles were fully characterized by UV-Vis spectroscopy, Dynamic Light Scattering and Scanning Electron Microscopy, and successfully used as Surface Enhanced Raman Scattering (SERS) substrates. The effect of shape and morphology on the Raman scattering enhancement was evaluated by using methylene blue as target molecules. The Raman measurements demonstrated that the prepared substrates are reliable and sensitive with analytical enhancement factors, estimated to be around 105 with a concentration of methylene blue 1 μM. When triangular and hexagonal nanoplates were tested with different concentrations of analyte, they demonstrated a good linearity in Raman intensity with a good detection of methylene blue 0.1 μM.

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Section: Introductionmentioning

confidence: 99%

SERS Activity of Silver Nanosphere, Triangular Nanoplates, Hexagonal Nanoplates and Quasi-Spherical Nanoparticles: Effect of Shape and Morphology

2020

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“…According to our approach special size fitted SERS active substrate was prepared by micromachining techniques in silicon wafer to be applicable for particle entrapment [2,3]. Periodic array of inverse pyramid structures were manufactured by anisotropic silicon etching and covered by gold.…”

Section: Methodsmentioning

confidence: 99%

Hierarchically Combined Periodic SERS Active 3D Micro- and Nanostructures for High Sensitive Molecular Analysis

et al. 2018

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To increase the local field intensity of Raman scattering, gold nanospheres were entrapped in gold coated periodic inverse pyramid structures, being SERS substrates by themselves. The applicability of this complex structure for sensitive molecule detection was proved by comparison of the detected Raman signals with and without particle entrapment. Moreover its relevance in molecular diagnostic was also proposed considering the specific surface functionalisation of the gold nanoparticles.

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“…Phương pháp SERS giúp cho tín hiệu tán xạ được tăng cường lên nhiều lần (10 6 -10 14 lần) do phương pháp này có độ nhạy rất cao. Nguyên lý của phương pháp là sử dụng các loại đế có thể cộng hưởng tần số với ánh sáng laser kích thích, từ đó làm tăng cường độ tín hiệu tán xạ của mẫu cần phân tích [1][2][3][4][5].…”

Section: đặT Vấn đềunclassified

Fabrication and study of Raman signal enhancement of pyramid/nano-Ag structured Silic substrate

Anh¹,

Kim²,

Thị³

et al. 2021

VJFC

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The pyramid-structured silicon substrate was successfully fabricated by a chemical corrosion method with an average thickness of about 1 - 3 μm with the optimal parameters such as corrosion temperature of 70oC, corrosion time of 5 min, concentration KOH of 3 M and isopropyl alcohol concentration of 1 M. After that, the silver nanoparticles layer (thickness 20 nm) was coated on the silicon substrate by a sputtering method to enhance the SERS signal. The results proved that the Pyramid/nano Ag structure silicon substrate showed the enhancement effect of Raman signal, and Rhodamine 6G pigment in food at low concentration (10-6 M) was detected and the enhancement factor was 9.7 × 102.

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Comparative Analysis of SERS Substrates of Different Morphology

Cited by 13 publications

References 3 publications

SERS Activity of Silver Nanosphere, Triangular Nanoplates, Hexagonal Nanoplates and Quasi-Spherical Nanoparticles: Effect of Shape and Morphology

SERS Activity of Silver Nanosphere, Triangular Nanoplates, Hexagonal Nanoplates and Quasi-Spherical Nanoparticles: Effect of Shape and Morphology

Hierarchically Combined Periodic SERS Active 3D Micro- and Nanostructures for High Sensitive Molecular Analysis

Fabrication and study of Raman signal enhancement of pyramid/nano-Ag structured Silic substrate

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