Optimization of porous silicon preparation technology for SERS applications

Chursanova, М. V.; Germash, L. P.; Yukhymchuk, V.О.; Dzhagan, Volodymyr; Ходасевич, И. А.; Cojoc, D.

doi:10.1016/j.apsusc.2009.12.036

Cited by 50 publications

(27 citation statements)

References 10 publications

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“…Due to its high surface-to-volume ratio this is an interesting material for photonic and sensing devices, drug delivery systems as well as for use in SERS. [16][17][18][19] The formation of metal nanostructures on the surface of porous Si could be performed in several ways. One of the methods includes immersion of porous Si in an aqueous solution of metal salt.…”

Section: Introductionmentioning

confidence: 99%

Metal Nanoparticles Deposited on Porous Silicon Templates as Novel Substrates for SERS

Mikac¹,

Ivanda²,

Gotić³

et al. 2015

Croat. Chem. Acta

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Abstract:In this paper, results on preparation of stable and uniform SERS solid substrates using macroporous silicon (pSi) with deposited silver and gold are presented. Macroporous silicon is produced by anodisation of p-type silicon in hydrofluoric acid. The as prepared pSi is then used as a template for Ag and Au depositions. The noble metals were deposited in three different ways: by immersion in silver nitrate solution, by drop-casting silver colloidal solution and by pulsed laser ablation (PLA). Substrates obtained by different deposition processes were evaluated for SERS efficiency using methylene blue (MB) and rhodamine 6G (R6G) at 514.5, 633 and 785 nm. Using 514.5 nm excitation and R6G the limits of detection (LOD) for macroporous Si samples with noble metal nanostructures obtained by immersion of pSi sample in silver nitrate solution and by applying silver colloidal solution to pSi template were 10 -9 M and 10 -8 M respectively. Using 633 nm laser and MB the most noticeable SERS activity gave pSi samples ablated with 30000 and 45000 laser pulses where the LODs of 10 -10 M were obtained. The detection limit of 10 -10 M was also reached for 4 mA cm -2 -15 min pSi sample, silver ablated with 30000 pulses. Macroporous silicon proved to be a good base for the preparation of SERS substrates.

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Section: Introductionmentioning

confidence: 99%

Metal Nanoparticles Deposited on Porous Silicon Templates as Novel Substrates for SERS

Mikac¹,

Ivanda²,

Gotić³

et al. 2015

Croat. Chem. Acta

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“…On one hand, these disparities can be explained by the complexity of the medium and by the strong dependence of PS parameters with the preparation processes. On the other hand, the electrical properties depend the on metallic contact and deposition method [7,8]. Some definitions are established from previous studies.…”

Section: Introductionmentioning

confidence: 99%

“…It is considered as a promising material fabricating chemical sensors, thermal microsensors, photodetector devices and solar cells [1,2,3,4 ]. The use of such PS components requires stable and reproducible layers with good electrical contacts.…”

Section: Introductionmentioning

confidence: 99%

Temperature measurement using a Chx/porous silicon/Si structure encapsulated in a CO2 rich environment

Chiali¹,

Ghellai²,

Gabouze³

et al. 2010

Advances in Materials Sciences

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This work reports on the possible use of microporous silicon as a temperature sensor. This work is based on previous published works [7, 8, and 9]. The device is based on hydrocarbon group (CH x ) / porous silicon (PS) /Si structure. The porous sample was coated with hydrocarbons groups deposited by the plasma of methane /argon mixture. Current-voltage characteristics have been investigated as a function of temperature in the range 20 0 C-70°C.The results show that for a constant voltage in the range 0.7-1V, the current increases linearly with the environment temperature reaches a maximum at 70°C and then stabilizes. This result suggests that the developed structure can be used for sensing temperatures not exceeding 70°C.

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“…There are two possibilities in this case: one with creation of a chemical bond and another without it. Besides, the efficiency of the SERS effect depends on morphology of nanostructured metal surface [6], conditions for deposition of the studied substance, parameters of exciting laser radiation as well as properties of the studied substance itself [7].…”

Section: Introductionmentioning

confidence: 99%

Efficient core-SiO2/shell-Au nanostructures for surface enhanced Raman scattering

Yukhymchuk¹

2014

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. The efficient SERS (surface enhanced Raman scattering) substrates that are films of nanoparticles (NP) of the "core-shell" type, where the core of SiO 2 , and the shell of gold nanoparticles, were developed in this work. Application of scanning electron microscopy and optical absorption enabled to find correlation between surface morphology of nanostructures and position of the plasmon absorption band. It helped to adjust the latter to the wavelength of exciting laser radiation. It has been shown that the designed nanostructures are able to enhance electric field of an emitting dipole not only due to adjustment of the band frequency for plasmon absorption to the wavelength of exciting laser radiation but also due to contribution of the so-called "hot spots" to enhancement of electric field scattering. Analysis of characteristics inherent to SERS substrates with nanostructures of the soil core -Au shell type has shown that they enhance the Raman signal by 5 orders higher as compared with the substrates based on SiO 2 nanospheres not covered with gold nanoparticles.

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Optimization of porous silicon preparation technology for SERS applications

Cited by 50 publications

References 10 publications

Metal Nanoparticles Deposited on Porous Silicon Templates as Novel Substrates for SERS

Metal Nanoparticles Deposited on Porous Silicon Templates as Novel Substrates for SERS

Temperature measurement using a Chx/porous silicon/Si structure encapsulated in a CO2 rich environment

Efficient core-SiO2/shell-Au nanostructures for surface enhanced Raman scattering

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