Plasmonic nanoparticles for environmental analysis

Kołątaj, Karol; Krajczewski, Jan; Kudelski, Andrzej

doi:10.1007/s10311-019-00962-1

Cited by 41 publications

(22 citation statements)

References 88 publications

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“…The development of nanotechnology offers great opportunities to choose appropriate nanoparticle morphologies, sizes and functionalization, that allow one to improve the performance in a specific application field. For the sensor industry this is translated into the optimization of nanomaterial shape and functionalization, to improve sensor sensitivity, selectivity, reusability, ecosafety, and easy and cheap production [31,59,[67][68][69]. The stake is the presence of different forms of functionalization on a single nanomaterial, with reproducible morphology, size and functionalities, with the aim to obtain ENMs, i.e., a single entity capable to carry out multiple actions.…”

Section: Synthesis Of Agnps Used For Water Protection Applicationsmentioning

confidence: 99%

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

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This review provides an up-to-date overview on silver nanoparticles-based materials suitable as optical sensors for water pollutants. The topic is really hot considering the implications for human health and environment due to water pollutants. In fact, the pollutants present in the water disturb the spontaneity of life-related mechanisms, such as the synthesis of cellular constituents and the transport of nutrients into cells, and this causes long / short-term diseases. For this reason, research continuously tends to develop always innovative, selective and efficient processes / technologies to remove pollutants from water. In this paper we will report on the silver nanoparticles synthesis, paying attention to the stabilizers and mostly used ligands, to the characterizations, to the properties and applications as colorimetric sensors for water pollutants. As water pollutants our attention will be focused on several heavy metals ions, such as Hg(II), Ni(II),Cu(II), Fe(III), Mn(II), Cr(III/V) Co(II) Cd(II), Pb(II), due to their dangerous effects on human health. In addition, several systems based on silver nanoparticles employed as pesticides colorimetric sensors in water will be also discussed. All of this with the aim to provide to readers a guide about recent advanced silver nanomaterials, used as colorimetric sensors in water.

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Section: Synthesis Of Agnps Used For Water Protection Applicationsmentioning

confidence: 99%

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

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“… Schematic illustration of the surface plasmon resonance (SPR) phenomenon. Reproduced with permission [ 6 ]. Copyright, 2020, Springer Nature.…”

Section: Figurementioning

confidence: 99%

“…To record the SERS spectrum, Raman scatterers (studied molecules) must be adsorbed at or be placed in a close proximity to the SERS-active material. The first surface-enhanced Raman spectra were published in 1974—in this case, the measurements were carried out on nanostructured silver [ 6 ]. During the next three decades, the SERS measurements were also carried out mainly on nanostructured plasmonic metals (Ag, Au and Cu), although other SERS substrates were also developed relatively quickly: in 1982, Loo recorded SERS spectra using as a SERS-active material polycrystalline TiO 2 [ 8 ] and in 1983, Yamada and Yamamoto produced SERS-active materials by the deposition of some metals on the surface of NiO and TiO 2 [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

2020

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The efficiency of the generation of Raman spectra by molecules adsorbed on some substrates (or placed at a very close distance to some substrates) may be many orders of magnitude larger than the efficiency of the generation of Raman spectra by molecules that are not adsorbed. This effect is called surface-enhanced Raman scattering (SERS). In the first SERS experiments, nanostructured plasmonic metals have been used as SERS-active materials. Later, other types of SERS-active materials have also been developed. In this review article, various SERS substrates formed on nanostructured non-metallic materials, including non-metallic nanostructured thin films or non-metallic nanoparticles covered by plasmonic metals and SERS-active nanomaterials that do not contain plasmonic metals, are described. Significant advances for many important applications of SERS spectroscopy of substrates based on nanostructured non-metallic materials allow us to predict a large increase in the significance of such nanomaterials in the near future. Some future perspectives on the application of SERS substrates utilizing nanostructured non-metallic materials are also presented.

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“…The aggregation and de-aggregation of plasmonic nanoobjects signicantly changes their optical properties, and this makes many important applications of light-induced transformations of such objects possible. [19][20][21] When a plasmonic nanostructure (meaning a nanoobject made from a plasmonic metalin general, a metal with a negative real and a small positive imaginary dielectric constant at the frequency of the illuminating radiation) is irradiated by an electromagnetic wave of the proper frequency, strong oscillations of conduction electrons are induced. This induced oscillation (a quantum of such plasma oscillation is called a plasmon) can be treated as an oscillating electric dipole that generates an additional electric eld; a situation in which such strong oscillations of surface plasmons are obtained is called surface plasmon resonance (SPR).…”

Section: Introductionmentioning

confidence: 99%