Macromolecular Decoration of Nanoparticles for Guiding Self&amp;;#x02010;Assembly in 2D and 3D

Kuttner, Christian; Chanana, Munish; Karg, Matthias; Fery, Andreas

doi:10.1002/9781118887813.ch6

Cited by 12 publications

(16 citation statements)

References 143 publications

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“… 52 , 53 These separations lie within the range of conventional capping agents. 54 Next, we will address the fabrication of suitable nanoparticles as building blocks.…”

Section: Resultsmentioning

confidence: 99%

Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces

et al. 2016

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We demonstrate a template-assisted colloidal self-assembly approach for magnetic metasurfaces on macroscopic areas. The choice of anisotropic colloidal particle geometry, assembly pattern and metallic film is based on rational design criteria, taking advantage of mirror-charge effects for gold nanorods placed on gold film. Monodisperse gold nanorods prepared utilizing wet-chemistry are arranged with high precision on wrinkled templates to form linear array-type assemblies and subsequently transferred to a thin gold film. Due to the obtained particle-to-film distance of 1.1 nm, the plasmonic mode of the nanorod is able to couple efficiently with the supporting metallic film, giving rise to a magnetic mode in the visible spectrum (721 nm). Conventional UV-vis-NIR measurements in close correlation with electromagnetic simulations provide evidence for the presence of a magnetic resonance on the macroscopic area. The herein presented scalable lithography-free fabrication process paves the road towards colloidal functional metasurfaces with an optical response in the effective magnetic permeability.

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“… 52 , 53 These separations lie within the range of conventional capping agents. 54 Next, we will address the fabrication of suitable nanoparticles as building blocks.…”

Section: Resultsmentioning

confidence: 99%

Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces

et al. 2016

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“…Ultimately, the challenge in ordered systems is the control of the interparticle spacings because the gap sizes correlate with the achievable field enhancements. Here, the coating of the NPs plays an essential role, as it may act as a guide for the self-assembly while at the same time act as a spacer in the final nanostructure [20].…”

Section: Sers Sensing Based On Ordered Assemblies Designed For High Smentioning

confidence: 99%

“…Within the scope of this book chapter, this diversity can, of course, only be covered to a limited extent. For this reason, the focus here is on NPs as defined building blocks for discrete nanostructures by guided self-assembly [20][21][22]. Figure 1 provides a rough overview of functional structures which have been found to be particularly suitable for sensor applications.…”

Section: Introductionmentioning

confidence: 99%

“…In this chapter, we will first address the field of plasmonic colorimetric sensing. Here, the fundamental concepts for sensing of surface plasmon resonances of metallic thin films are reviewed and then extended to localized surface plasmon resonances [26] of NPs and ordered NP assemblies by guided self-assembly [20][21][22]. Second, we will review SERS analytics divided into several steps: the first principles of SERS [27] and off-resonance excitation, SERS analytics of dispersed particles with a focus of the tasks of functional shells, SERS analytics using disordered aggregates under controlled conditions, and finally ordered assemblies designed for high SERS activity [28,29].…”

Section: Introductionmentioning

confidence: 99%

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Plasmonics in Sensing: From Colorimetry to SERS Analytics

Kuttner¹

2018

Plasmonics

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This chapter gives a brief overview of plasmonic nanoparticle (NP)-based sensing concepts ranging from classical spectral-shift colorimetry to the highly active field of surface-enhanced Raman scattering (SERS) spectroscopy. In the last two decades, colloidal approaches have developed significantly. This is seen with, for example, refractive-index sensing, detection of ad−/desorption and ligand-exchange processes, as well as ultrasensitive chemical sensing utilizing well-defined nanocrystals or discrete self-assembled superstructures in 2D and 3D. Apart from individual NPs, the rational design of self-assembled nanostructures grants spectroscopic access to unprecedented physicochemical information. This involves selected research examples on molecular trapping, ligand corona analysis, SERS-encoding, and biosensing. The origin of the SERS effect, also in regard to hot spot formation by off-resonant excitation, is reviewed and discussed in the context of the current challenge to formulate a generalized metric for high SERS efficiency. Special emphasis lies in addressing the fundamental design criteria and the specific challenges of these particle-based sensing techniques.

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“…Within this framework, a vast amount of work has been carried out to improve signal reliability by directed self-assembly strategies (Figure 3) [71][72][73][74][75][76][77]. SERS detection of scrambled prions at various concentrations in bovine serum, using gold nanorod supercrystals as the transducer [9].…”

Section: Improving Sers Detection Through Self-assemblymentioning

confidence: 99%

Colloidal design of plasmonic sensors based on surface enhanced Raman scattering

Hamon

Liz‐Marzán

2018

Journal of Colloid and Interface Science

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This feature article focuses on the use of colloid chemistry to engineer metallic nanostructures toward application in surface enhanced Raman scattering (SERS) sensing, in particular for 'real-life' applications, where the analyte may be present in complex mixtures. We present a broad summary of the field, including recent advances that have been developed during the past 10 years. Real-life applications require a rational design and we aimed at identifying the key elements involved in it. The discussion is centered around colloidal plasmonic nanoparticles and therefore we start from the library of morphologies that have been reported in the literature. To complete the picture, colloidal self-assembly, surface chemistry and the combination with materials science techniques are highlighted. Considering the progress in the field, SERS may ultimately realize its full potential as an ultrasensitive tool for routine analytical applications.

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Macromolecular Decoration of Nanoparticles for Guiding Self&;#x02010;Assembly in 2D and 3D

Cited by 12 publications

References 143 publications

Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces

Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces

Plasmonics in Sensing: From Colorimetry to SERS Analytics

Colloidal design of plasmonic sensors based on surface enhanced Raman scattering

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