Reaktionsverfolgung von Festphasensynthesen in selbstassemblierenden Monolagen mit oberflächenverstärkter Raman‐Spektroskopie

Scherrer, Dominik; Vogel, David; Drechsler, Ute; Olziersky, Antonis; Sparr, Christof; Mayor, Marcel; Lörtscher, Emanuel

doi:10.1002/ange.202102319

Cited by 4 publications

(3 citation statements)

References 48 publications

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“…In particular, electron beam lithography (EBL), which has the characteristics of being compatible with mass production manufacturing, is a maskless technology based on direct writing in an electron beam sensitive material to make micro‐ and nanopatterns [32–33] . For example, nanopore arrays were fabricated on single‐crystal Si substrates using a two‐layer electron beam lithography process, exhibiting high reliability in terms of signal reproducibility and chemical stability [34] . The nanopatterned substrates had the character of ultra‐high sensitivity due to the pattern enhanced the incident electromagnetic radiation to increase the intensity of the scattered light (Figure 2A).…”

Section: Rational Design Of Sers Substrate For High Reproducibility A...mentioning

confidence: 99%

Rational Design of Surface‐Enhanced Raman Scattering Substrate for Highly Reproducible Analysis

2022

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Surface-enhanced Raman scattering (SERS) is an intense ongoing hot topic due to the ultrahigh sensitivity of intrinsic molecular fingerprint information. However, the reliable SERS analysis is restricted because of the lack of efficient control over the large scale of Raman substrates. With the evolution of nanotechnology, new approaches are being developed to produce substrates with higher reproducibility. In this review, we briefly introduce the factors that affect the reproducibility for SERS analysis. The recent progress in the design of SERSactive substrates is further summarized, including fabrication of uniform nanostructures, accurate control of nanogaps and molecular regulation. In the end, an outlook of the direction of reliable SERS detection is given. Rational design of SERS substrate for high reproducibility analysis Precisely Fabrication of NanostructuresSERS active substrates such as noble metal Au, Ag and Cu are prerequisites for SERS formation, with surface plasmon resonance properties. [10] However, these mental nanomaterials of [a

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Section: Rational Design Of Sers Substrate For High Reproducibility A...mentioning

confidence: 99%

Rational Design of Surface‐Enhanced Raman Scattering Substrate for Highly Reproducible Analysis

2022

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“…The surfaces of inorganic nanoparticles play a critical roles for many applications, such as catalysis, [1–6] chemical sensing, [7–11] and surface enhanced Raman/fluorescence spectroscopy [12–19] . Such applications require the balance between surface accessibility of reactant/probe/target molecules and the colloidal stability of NPs [20–25] .…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Polymer Networks Locking on Inorganic Nanoparticles

Tao

et al. 2023

Angewandte Chemie

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, singlelayer networks of covalently linked monomers, show perspectives as membranes and in electronics. However, 2D polymerization of monomers in orthogonal directions limited the formation of 2DPs on nanoparticles (NPs) with high surface curvatures. Here we propose a high-curvature 2D polymerization to form a single-layer 2DP network as a non-contacting ligand on the surface of NPs for their stabilization and functionalization. The high-curvature 2D polymerization of amphiphilic Gemini monomers was conducted in situ on surfaces of NPs with various sizes, shapes, and materials, forming highly cross-linked 2DPs. Selective etching of core-shell NPs led to 2DPs as a non-contact ligand of yolk-shell structures with excellent shape retention and high NPsurface accessibility. In addition, by copolymerization, the 2DP ligands can covalently link to other functional molecules. This work promotes the development of 2DPs on NPs for their functional modification.

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“…[ 8–10 ] Currently, plasmonic metals gold (Au), silver (Ag), and copper (Cu), have extensively been exploited as SERS platforms mainly due to their significantly enhanced Raman signal at the nanoscale evolved from their plasmonic features. [ 11–13 ] These metal nanoparticles could be easily assembled to improve their performance, [ 14–17 ] and effectively control the detected signal intensity by regulating the intrinsic activity. [ 18–20 ]…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Nanoparticle Arrays Guided by Ordered Nanowire Films Enhance Surface‐Enhanced Raman Scattering

Sheng

Zheng

Feng

et al. 2022

Advanced Optical Materials

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platforms with high sensitivity to identify the presence of toxic substances. [8][9][10] Currently, plasmonic metals gold (Au), silver (Ag), and copper (Cu), have extensively been exploited as SERS platforms mainly due to their significantly enhanced Raman signal at the nanoscale evolved from their plasmonic features. [11][12][13] These metal nanoparticles could be easily assembled to improve their performance, [14][15][16][17] and effectively control the detected signal intensity by regulating the intrinsic activity. [18][19][20] When plasmonic nanoparticles (NPs) are closely aligned, a considerable number of hotspots are created in the vicinity area and enhance the Raman signals. [21][22][23][24][25][26] To obtain unique nanostructures with high SERS sensitivity, various methods have been used to assemble plasmonic nanoparticles into controllable order and superstructures for desired properties, such as self-evaporation, [27,28] DNA-assisted, [29,30] field-induced, [31,32] laser micro/nano-fabrication, [33][34][35][36] and photolithography patterning templates. [37][38][39][40] However, the fabrication of highly ordered and homogeneous nanostructures by these methods implies control over a multitude of parameters, including the surface chemistry interactions of building blocks, solvent evaporation rate, vectorization of the applied field, and sophisticated patterned template design. Precise control of these parameters reduces the efficiency of preparing well-ordered, tightly packed SERS substrates, and increases the difficulty of nanostructure regulation and the corresponding fabrication costs. Importantly, the existing works rarely explore the ordering effect of materials on the SERS performance.Here, we report a new way for higher SERS activity by assembling the disordered materials into the ordered structures. The ordered tellurium (Te) nanowire (NW) templates are used to lead the alignment of Au nanoparticles, similar to textile threads in clothing, and the resulting Au NPs are connected in series along ordered arrangement nanowires to form ordered close-packed nanostructures. Unlike complicated and tedious ordered assembly methods, the ordered nanowire templates used to guide the assembly of Au NPs can be quickly obtained by the liquid-air interfacial assembly method, which is suitable for a variety of substrates, including rigid silicon Designing high-efficiency surface-enhanced Raman scattering (SERS) substrates has attracted explosive attention in recent decades for their novel and potential applications. Great achievements have been made to optimize the intrinsic activity of nanomaterial in SERS substrates, while little attention has been paid to the unique structural design of the nanomaterial building blocks. Herein, a new strategy is provided for assembling Au nanoparticles into well-defined ordered structures by using a highly ordered arrangement nanowires template to explore the ordering effect on the SERS performance. The highly ordered Au nanoparticle arrays show a detection limit of 10 −9 m tha...

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Reaktionsverfolgung von Festphasensynthesen in selbstassemblierenden Monolagen mit oberflächenverstärkter Raman‐Spektroskopie

Cited by 4 publications

References 48 publications

Rational Design of Surface‐Enhanced Raman Scattering Substrate for Highly Reproducible Analysis

Rational Design of Surface‐Enhanced Raman Scattering Substrate for Highly Reproducible Analysis

Two‐Dimensional Polymer Networks Locking on Inorganic Nanoparticles

Anisotropic Nanoparticle Arrays Guided by Ordered Nanowire Films Enhance Surface‐Enhanced Raman Scattering

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