SERS detection of low-concentration adenosine by silver nanoparticles on silicon nanoporous pyramid arrays structure

Zhang, C.; Man, Baoyuan; Jiang, Shouzhen; Yang, Cheng; Liu, M.; Chen, C.S.; Xu, Shiguo; Qiu, Hengwei; Li, Z.

doi:10.1016/j.apsusc.2015.04.170

Cited by 68 publications

(23 citation statements)

References 32 publications

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“…PMMA has been widely used as a SERS substrate because it is a low‐cost substrate that is intrinsically flexible and transparent, chemically stable, and nontoxic . Pyramidal Si, which has a large specific surface area and periodic construction, has been demonstrated to be an amplifier of the optical field around metal nanoparticles, especially in the field of plasmonics . Before casting the pyramidal polymer, we first fabricated the AgNPs/MoS 2 /pyramidal Si substrate to introduce the SERS effect, where MoS 2 was deposited on the pyramidal Si via the thermal decomposition of (NH4) 2 MoS 5 and the chemically synthesized AgNPs were transferred to the MoS 2 /pyramidal Si substrate using a dip‐coating method.…”

Section: Introductionmentioning

confidence: 99%

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

et al. 2018

Adv Materials Technologies

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provide more hot spots, which are introduced by the electromagnetic mechanism (EM). By the virtue of their larger specific surface area and periodic structure, 3D SERS substrates can effectively amplify the optical field around metal nanoparticles (NPs), thereby enhancing the Raman signal. Moreover, the 3D structure of these substrates is beneficial for the enrichment of probe molecules around metal nanoparticles; as a result, one can still obtain a high Raman signal, even under an ultralow concentration. Consequently, an increasing number of researchers are now focusing on the design and fabrication of 3D SERS substrates.To make full use of the merits of the 3D structure, SERS substrates based on 2D materials and metal nanoparticles have been combined and proposed. [23,24] In these 3D SERS substrates, the 3D structure can fully utilize the 3D focal volume of the incident beam and increase the density of the metal nanoparticles. Furthermore, introduction of the 2D material can act as an atomically thick SERS substrate, [25] perfect absorbent layer of molecules, [26] excellent sub-nanometer spacer, [27] and passivation layer for metal, [28,29] and introduce enhancements via a chemical mechanism (CM). Previously, a 3D SERS substrate based on graphene covering a pyramid-shaped Au structure was reported to achieve high enhancement. [30] While the integration of graphene and pyramid-shaped Au was successfully implemented, this 3D SERS substrate was not flexible and did not meet with the requirements when detecting probe molecules on an arbitrary curvilinear surface.Therefore, transformation of these stiff 3D substrates into flexible structures via using various methods has been investigated extensively. Leem et al. reported 3D crumpled graphene-AuNPs hybrid structures for SERS applications using a mechanical self-assembly strategy on a thermally activated polymer. [31] Similarly, Lee et al. fabricated a rippled graphene structure on a polystyrene substrate using a thermal rippling process and demonstrated the increased plasmonic coupling and higher density of the hot spots on the rippled nanostructure. [32] Kumar et al. presented a flexible SERS sensor by depositing Ag on structured polydimethylsiloxane using a Taro leaf as the template and achieved highly sensitive detection for malachite green. [33] Moreover, to fabricate a flexible 3D SERS substrate, the transfer printing technique, [34] shadow Substrate design has attracted much interest in development of an effective surface enhanced Raman scattering (SERS) sensor. A flexible SERS substrate with excellent performance needs to be sensitive to details of the preparation process; this sensitivity represents a significant challenge for practical applications as opposed to laboratory research applications. Here, a 3D flexible plasmonic structure, AgNPs@MoS 2 /pyramidal polymer (polymethyl methacrylate), is fabricated using a simple and lowcost method. Using experiments and theoretical simulations, the SERS performance of the proposed substrate is assessed in terms of ...

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Section: Introductionmentioning

confidence: 99%

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

et al. 2018

Adv Materials Technologies

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“…Adenosine and cytidine were selected as the probe molecules to investigate the SERS ability of the MoS2-pyramid-Si substrate, has shown that the MoS2-pyramid-Si substrate can prominently suppress photobleaching and fluorescence of the probe molecule. 27 Fig.1 schematically illustrates the three steps process for the synthesis of MoS2 thin layers. The minimum detected concentration of both adenosine and cytidine on MoS2-pyramid-Si substrate can reach 10 -6 M. Importantly, the linear relationship between Raman intensity and concentration of adenosine or cytidine can apply to the bimolecular detection.…”

Section: Introductionmentioning

confidence: 99%

Large-area MoS₂ thin layers directly synthesized on Pyramid-Si substrate for surface-enhanced Raman scattering

Qiu

Gao

et al. 2015

RSC Adv.

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In our work, we directly synthesized few layers MoS2 on pyramid-Si substrate to fabricate surface-enhanced Raman scattering (SERS) substrate via thermally decomposing the precursor of ammonium thiomolybdate ((NH4)2MoS4). Scanning electron microscope (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD) and Raman spectra are employed to characterize the as-grown MoS2 layers. Adenosine and cytidine were selected as the probe molecules to investigate the SERS ability of the MoS2-pyramid-Si substrate, has shown that the MoS2-pyramid-Si substrate can prominently suppress photobleaching and fluorescence of the probe molecule. Compare with MoS2-flat-Si substrate (MoS2 layers synthesized on flat-Si substrate), the MoS2pyramid-Si substrate has more significant SERS ability. The minimum detected concentration of both adenosine and cytidine on MoS2-pyramid-Si substrate can reach 10 -6 M. Importantly, the linear relationship between Raman intensity and concentration of adenosine or cytidine can apply to the bimolecular detection. This work may provide a new opportunity for the studying of chemistry mechanism (CM) and novel SERS substrate fabricating.

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“…Figure 1 schematically illustrates the simple process for the synthesis of GO/AgNPs/PCu@Si substrate PSi substrate (boron-doped single crystal silicon) was fabricated by using wet texturing technology with the assist of NaOH21. The Cu film was synthesized on the PSi by thermal evaporation.…”

Section: Methodsmentioning

confidence: 99%

High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si

Zhang

et al. 2016

Sci Rep

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We present a novel surface-enhanced Raman scattering (SERS) substrate based on graphene oxide/silver nanoparticles/copper film covered silicon pyramid arrays (GO/AgNPs/PCu@Si) by a low-cost and simple method. The GO/AgNPs/PCu@Si substrate presents high sensitivity, good homogeneity and well stability with R6G molecules as a probe. The detected concentration of Rhodamine 6 G (R6G) is as low as 10−15 M. These sensitive SERS behaviors are also confirmed in theory via a commercial COMSOL software, the electric field enhancement is not only formed between the AgNPs, but also formed between the AgNPs and Cu film. And the GO/AgNPs/PCu@Si substrates also present good property on practical application for the detection of methylene blue (MB) and crystal violet (CV). This work may offer a novel and practical method to facilitate the SERS applications in areas of medicine, food safety and biotechnology.

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SERS detection of low-concentration adenosine by silver nanoparticles on silicon nanoporous pyramid arrays structure

Cited by 68 publications

References 32 publications

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

Large-area MoS₂ thin layers directly synthesized on Pyramid-Si substrate for surface-enhanced Raman scattering

High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si

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SERS detection of low-concentration adenosine by silver nanoparticles on silicon nanoporous pyramid arrays structure

Cited by 68 publications

References 32 publications

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

Constructing 3D and Flexible Plasmonic Structure for High‐Performance SERS Application

Large-area MoS2 thin layers directly synthesized on Pyramid-Si substrate for surface-enhanced Raman scattering

High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si

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Large-area MoS₂ thin layers directly synthesized on Pyramid-Si substrate for surface-enhanced Raman scattering