Detection and analysis of SERS effect of nano gold by self-assembly chemical plating composite method

Wang, Chunyan; Xu, Yanhua; Zhao, He; Chen, Gang; Lai, Chuan; Liao, Xin; Wang, Rong

doi:10.1016/j.apsusc.2015.05.083

Cited by 24 publications

(12 citation statements)

References 32 publications

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“…The chloroform suspension of functionalized particles (Sec. 2.2.1), with a nominal concentration of 5.47×10 16 particles/µL, was spread dropwise over the water/air interface using a 50µL Hamilton glass syringe. Milli-Q water in equilibrium with atmospheric CO 2 was used as subphase (nominal pH = 5.7).…”

Section: Langmuir Monolayers Of Nanoparticlesmentioning

confidence: 99%

“…The optimization of the surface density of hotspots, ideally is realized by controlling the spacing and lateral dimensions between nanoparticles which typically are in the range 10-100 nm. A simple, straightforward protocol for the preparation of SERS substrates consists on forming self-assembled monolayers (SAM) of gold or silver nanoparticles in contact with a substrate that has been chemically modified to provide suitable binding sites [16] [17]. Available control parameters in this method are the material, size, and shape of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring plasmonic response by Langmuir–Blodgett gold nanoparticle templating for the fabrication of SERS substrates

Tahghighi

Mannelli

Janner

et al. 2018

Applied Surface Science

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Nanoparticle self-assembly is a robust and versatile strategy for the development of functional nanostructured materials, offering low-cost and scalable methods that can be fine-tuned for many different specific application. In this work, we demonstrate a pathway for the fabrication of tailorable quasi-two-dimensional lattices of gold nanoparticles to be used in Surface Enhanced Raman Scattering (SERS) detection of biomolecules. As a first step, nanoparticles are spread as a monolayer at the water/air interface, compressed to a target lateral density in a Langmuir-Blodgett technique, and transferred to a properly functionalized substrate surface. Once firmly adhered to the substrate, the lattice of nanoparticles can be directly used or be further processed using electroless gold deposition to let the nanoparticle grow thus tuning the plasmonic response and SERS enhancement. Compared to direct deposition or self-assembly methods, our protocol enables to obtain consistent results and much higher coverage of Au nanoparticles thanks to the active control of the surface pressure of the spread monolayer.

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Section: Langmuir Monolayers Of Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring plasmonic response by Langmuir–Blodgett gold nanoparticle templating for the fabrication of SERS substrates

Tahghighi

Mannelli

Janner

et al. 2018

Applied Surface Science

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“…Now it is widely recognized that the SERS’ effect primarily originates from electromagnetic (EM) enhancement and chemical (CHEM) enhancement effects [ 47 ]. Giant EM enhancement mainly arises from coupling of incident light with the LSPR of individual nanosized metallic particles or with the near-field of nanogaps, nanotips, nanopores, and some of spatially confined sites, which can greatly enhance the Raman cross-section of the analyte adjacent to the site [ 12 ]. The highly concentrated EM field or the remarkably enhanced local optical field is widely acknowledged as a “hot spot”.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast to other coating techniques, such as sputtering, chemical vapor deposition (CVD), ion beam assisted deposition, pulsed vacuum arc deposition (PVAD) [ 12 , 13 , 14 ], electroplating, electrochemical or electrophoresis deposition [ 15 , 16 ], EP required neither complicated, expensive equipment nor sophisticated operation. This method has been developed to fabricate large-area, uniform and reproducible substrates for surface-enhanced Raman scattering (SERS) [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Seed-Mediated Electroless Deposition of Gold Nanoparticles for Highly Uniform and Efficient SERS Enhancement

Tang

Zhou

et al. 2019

Nanomaterials

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A seed-mediated electroless deposition (SMED) approach for fabrication of large-area and uniform gold nanoparticle films as efficient and reproducible as surface-enhanced Raman scattering (SERS) substrates was presented. This approach involved a seeding pretreatment procedure and a subsequent growth step. The former referred to activation of polylysine-coated glass slides in gold seed solution, and the latter required a careful control of the reactant concentration and reaction time. With the aid of gold seeds and appropriate reaction conditions, a large-area and uniform nanofilm with evenly distributed gold nanoparticles (Au NPs) was formed on the surface of the substrates after adding a mixed solution containing ascorbic acid and trisodium citrate. The morphology of the Au nanofilm was examined by scanning electron microscopy. The size evolution of Au NPs on the surface of the substrates was analyzed in detail. The nanofilm substrate was prepared by reaction conditions of the seeded activation process: 10 mL ascorbic acid and trisodium citrate mixture and 30 min of soaking time, which exhibited an excellent uniformity and reproducibility of SERS enhancement with relative standard deviation (RSD) values of less than 8% (particularly, a RSD value of 3% can be reached for the optimized measurement). Compared to the common electroless deposition, the seed-mediated electroless deposition possessed inherent advantages in controllability, reproducibility, and economic benefit.

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“…55 nm Au NPs were selected as the cores due to the strongest SERS signals produced with high enhancement [39]. The morphology and structures of the resulting Au@CA+Mpy@Ag NPs were firstly investigated via TEM and STEM as displayed in Fig.…”

Section: Characterization Of the Au@ca+mpy@ag Nanoparticlesmentioning

confidence: 99%

Target induced interfacial self-assembly of nanoparticles: A new platform for reproducible quantification of copper ions

Liang

Zhang

et al. 2016

Talanta

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Detection and analysis of SERS effect of nano gold by self-assembly chemical plating composite method

Cited by 24 publications

References 32 publications

Tailoring plasmonic response by Langmuir–Blodgett gold nanoparticle templating for the fabrication of SERS substrates

Tailoring plasmonic response by Langmuir–Blodgett gold nanoparticle templating for the fabrication of SERS substrates

Seed-Mediated Electroless Deposition of Gold Nanoparticles for Highly Uniform and Efficient SERS Enhancement

Target induced interfacial self-assembly of nanoparticles: A new platform for reproducible quantification of copper ions

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