Ag nanostructures as the surface plasmon resonance (SPR)˗based sensors: A mechanistic study with an emphasis on heavy metallic ions detection

Amirjani, Amirmostafa; Haghshenas, Davoud Fatmehsari

doi:10.1016/j.snb.2018.07.089

Cited by 115 publications

(41 citation statements)

References 107 publications

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“…Amirjani and Haghshenas summed up recent studies about silver nanoparticle-based plasmonic sensors for heavy metal ion (Co 2+ , Hg 2+ , Cd 2+ , Pb 2+ , and Cu 2+ ) detection [ 95 ]. As depicted in Figure 9 , they dared to shed more light on the monitoring of LSPR properties of silver nanoparticles that depended on the changes of aggregation, anti-aggregation, oxidation reduction, and dimensional-morphological.…”

Section: Monitoring Biological and Chemical Threats Agentsmentioning

confidence: 99%

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Plasmonic Sensors for Monitoring Biological and Chemical Threat Agents

2020

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Sensors are excellent options owing to their ability to figure out a large number of problems and challenges in several areas, including homeland security, defense, medicine, pharmacology, industry, environment, agriculture, food safety, and so on. Plasmonic sensors are used as detection devices that have important properties, such as rapid recognition, real-time analysis, no need labels, sensitive and selective sensing, portability, and, more importantly, simplicity in identifying target analytes. This review summarizes the state-of-art molecular recognition of biological and chemical threat agents. For this purpose, the principle of the plasmonic sensor is briefly explained and then the use of plasmonic sensors in the monitoring of a broad range of biological and chemical threat agents is extensively discussed with different types of threats according to the latest literature. A conclusion and future perspectives are added at the end of the review.

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Section: Monitoring Biological and Chemical Threats Agentsmentioning

confidence: 99%

“… Sensing mechanisms of gold nanoparticle-based plasmonic sensors. Republished with permission from [ 95 ]; permission conveyed through Copyright Clearance Center, Inc. …”

Section: Figurementioning

confidence: 99%

Plasmonic Sensors for Monitoring Biological and Chemical Threat Agents

2020

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“…7 This composite has a complex mechanism of interaction with the 3d orbital of Au atom in the substrate, which could change the surface plasmonic effect because of the adsorption the composite film causing a shift of the SPR angle, reducing the θ values close to 45 . 7,17,29,30 The refraction angles of each bilayer in the LbL film architecture were structured in Table 2.…”

Section: Interaction Study By Sprmentioning

confidence: 99%

An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer‐by‐layer films

Lima

Maciel

Ferreira

et al. 2020

J of Applied Polymer Sci

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In this paper, we report the controlled fabrication of layer-by-layer (LbL) films deposited on gold substrates with three different supramolecular architectures using polypyrrole (Ppy) and magnetite nanoparticles (Fe 3 O 4-np), besides conventional poly(allylamine hydrochloride) (PAH) e poly(vinyl sulfonic acid) (PVS) polyelectrolytes, demonstrating the synergistic effect between Ppy and Fe 3 O 4-np such as a result of their interaction. Modified gold electrodes were analyzed by contact angle (wettability), surface plasmon resonance (SPR), raman spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The (Fe 3 O 4-np/Ppy) 3 architecture was also evaluated by scanning electron microscopy. The modified gold electrodes present more homogeneous covering, higher electron transfer and a decrease of resistance with the incorporation of the nanostructured materials such as Ppy and Fe 3 O 4-np forming (Fe 3 O 4-np/Ppy) 3 LbL film. The results carried out in this study suggest that the (Fe 3 O 4-np/Ppy) 3 LbL film can be applied as a possible electrochemical or optical non-enzymatic sensor for analytical detection.

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“…As for M NPs, a specific size-dependent plasma absorption will be presented when the size is smaller than the average free path length of conduction electrons (i.e., <20 nm) based on Mie's theory [7,8]. If the M NPs are irradiated by light, strong optical absorption and/or scattering phenomenon will happen forcefully relied on their size, morphology, and dielectric environment, which is recognized as localized surface plasmon resonance (LSPR) [9][10][11]. Consequently, M NPs show the intense colours owing to the collective oscillation of conduction electrons upon interaction with light and this particular property has been widely developed in catalysis, optoelectronics, sensing, and surface-enhanced Raman scattering (SERS) [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Synthesis, Properties, and Biological Applications of Platinum Nanoclusters

Huang

et al. 2019

Journal of Nanomaterials

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Noble metal nanoclusters (M NCs), defined as an aggregation of a few to tens of atoms, are considered a borderline between atoms and metal nanoparticles (M NPs), which tends to exhibit molecule-like behaviours such as discrete electronic state and size-dependent fluorescence. In the past decades, gold and silver nanoclusters (Au NCs and Ag NCs) have been massively explored and utilized in the field of industrial catalysis, optoelectronic devices, biological imaging, environmental detection, clinical diagnoses, and treatment. The analogue of Au and Ag NCs and platinum nanoclusters (Pt NCs), especially their biological applications, is relatively and rarely discussed. This review firstly investigates the synthetic methodology of Pt NCs including template-assisted and template-free approaches and then introduces their unique optical, catalytic, and thermal properties. Particular importance here is the biological applications of Pt NCs such as the bioimaging of various cells as a preferred fluorophore in contrast to traditional fluorescent markers (e.g., organic dye, semiconductor quantum dots, and fluorescent proteins), the usage of Pt NCs-based antitumour drugs as a new class chemotherapeutics for malignant tumour therapy, and the utilization of antibacteria as an alternative of Ag-based antibacterial agent. On the whole, the development of Pt NCs has already gained delectable progress; however, the study of ultrafine Pt NCs is at the beginning stage and there are still plenty of challenges like synthesis of near-infrared (NIR) fluorescent Pt NCs, the explicit signal pathway of cell apoptosis, and attempt in diverse biological applications that need to be urgently tackled in future.

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Ag nanostructures as the surface plasmon resonance (SPR)˗based sensors: A mechanistic study with an emphasis on heavy metallic ions detection

Cited by 115 publications

References 107 publications

Plasmonic Sensors for Monitoring Biological and Chemical Threat Agents

Plasmonic Sensors for Monitoring Biological and Chemical Threat Agents

An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer‐by‐layer films

Recent Advances in the Synthesis, Properties, and Biological Applications of Platinum Nanoclusters

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