Controlled Fabrication of Gold-Coated 3D Ordered Colloidal Crystal Films and Their Application in Surface-Enhanced Raman Spectroscopy

Lu, Lehui; Randjelovic, Igor; Capek, Richard; Gaponik, Nikolai; Yang, Jianhui; Zhang, and Hongjie; Eychmüller, Alexander

doi:10.1021/cm051473d

Cited by 144 publications

(91 citation statements)

References 39 publications

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“…41 Recently, three-dimensional ordered nanoparticle metal films have been prepared by using self-assembled amino-modified silicon spheres as a template. 42 In this procedure, the self-assembled silicon film is immersed in a gold nanoparticle solution and the solution stirred for several minutes. The resulting arrangement of gold nanoparticles represents a film of three-dimensional ordered 'colloidal crystal' which shows good SERS activity.…”

Section: Clustered Nanoparticles In the Liquid Phasementioning

confidence: 99%

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

Brown

Milton

2008

J Raman Spectroscopy

221

201

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We review the performance of various nanoscaled structures needed to support the propagation of the surface plasmons responsible for surface-enhanced Raman scattering (SERS), and assess the potential for the optimisation of the compromise between enhancement and reproducibility that they provide, and hence their utility for relevant applications. We divide these nanostructures into those comprising structured arrays of discrete nanoparticles in two or three dimensions, and those comprising structured or regularly patterned surfaces in two or three dimensions. The most promising in terms of this compromise are those that involve the tethering of functionalised metal nanoparticles to surfaces. They are not only reproducible, but the functionalisation provides a measure of selectivity to relevant target analytes that the majority of SERS applications require.

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Section: Clustered Nanoparticles In the Liquid Phasementioning

confidence: 99%

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

Brown

Milton

2008

J Raman Spectroscopy

221

201

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“…[7] These remarkable characteristics suggest the possibility of basing ultrasensitive molecular sensing techniques on SERS, and have led to a series of strategies for developing a reliable SERS-based sensing platform. [8][9][10][11][12] Unfortunately, SERS has still not gained wide acceptance as a general spectroscopic tool owing to the poor SERS substrate stability until now, which, to a great extent, limits the exploration of SERS-based devices.…”

Section: Introductionmentioning

confidence: 99%

Large‐Area Silver‐Coated Silicon Nanowire Arrays for Molecular Sensing Using Surface‐Enhanced Raman Spectroscopy

Zhang

Wang

et al. 2008

Adv Funct Materials

Self Cite

365

220

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A new and facile method to prepare large‐area silver‐coated silicon nanowire arrays for surface‐enhanced Raman spectroscopy (SERS)‐based sensing is introduced. High‐quality silicon nanowire arrays are prepared by a chemical etching method and used as a template for the generation of SERS‐active silver‐coated silicon nanowire arrays. The morphologies of the silicon nanowire arrays and the type of silver‐plating solution are two key factors determining the magnitude of SERS signal enhancement and the sensitivity of detection; they are investigated in detail for the purpose of optimization. The optimized silver‐coated silicon nanowire arrays exhibit great potential for ultrasensitive molecular sensing in terms of high SERS signal enhancement ability, good stability, and reproducibility. Their further applications in rapidly detecting molecules relating to human health and safety are discussed. A 10 s data acquisition time is capable of achieving a limit of detection of approximately 4 × 10−6 M calcium dipicolinate (CaDPA), a biomarker for anthrax. This value is 1/15 the infectious dose of spores (6 × 10−5 M required), revealing that the optimized silver‐coated silicon nanowire arrays as SERS‐based ultrasensitive sensors are extremely suitable for detecting Bacillus anthracis spores.

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“…However, this useful strategy requires a linking agent prior to the substrate preparation and has been reported for analyte detection in solution only. Examples of other polymerbased materials used for SERS include the incorporation of PVP/ Ag colloidal solution on poly(methylmethacrylate) (PMMA) slides to provide durable SERS-active substrates, 20 the SERS analysis of Rhodamine 6G molecules adsorbed on a thin gold film deposited on polystyrene colloidal crystals, 21 SERS analysis of the PP vitamin onto a silver sol of PVP on a wide range of pH values 22 and solid Ag bionanocomposites of chitosan 23 and cellulose. 24 In this work, we report for the first time the synthesis of polymer-based nanocomposites for SERS analysis using in situ miniemulsion polymerization in the presence of organically capped metal Ag nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Polymer based silver nanocomposites as versatile solid film and aqueous emulsion SERS substrates

et al. 2011

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Nanocomposites containing Ag nanoparticles (average diameter $11 nm) dispersed in poly(tertbutylacrylate) were prepared by in situ polymerization via miniemulsions and constitute active and versatile SERS substrates. The use of this synthetic strategy enables the dual use of the final composites as SERS substrates, both as aqueous emulsions and as cast films, shown here by several measurements using thiosalicylic acid as the testing analyte. The main advantage of these types of materials is related to the potential to scale up and the widespread use of handy substrates, using technology already available. This requires homogeneous composite substrates with SERS activity and this was demonstrated here by means of confocal Raman microscopy. Finally, a series of experiments were carried out on Ag/polymer nanocomposites submitted to temperature variations below and above the polymer glass transition temperature (T g ) in order to conclude about the effect of temperature processing conditions on the composites' SERS activity.

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Controlled Fabrication of Gold-Coated 3D Ordered Colloidal Crystal Films and Their Application in Surface-Enhanced Raman Spectroscopy

Cited by 144 publications

References 39 publications

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

Large‐Area Silver‐Coated Silicon Nanowire Arrays for Molecular Sensing Using Surface‐Enhanced Raman Spectroscopy

Polymer based silver nanocomposites as versatile solid film and aqueous emulsion SERS substrates

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