Structural and optical properties of dense vertically aligned ZnO nanorods grown onto silver and gold thin films by galvanic effect with iron contamination

Scarpellini, D.; Paoloni, S.; Medaglia, P. G.; Pizzoferrato, R.; Orsini, Andrea; Falconi, Christian

doi:10.1016/j.materresbull.2015.01.059

Cited by 19 publications

(15 citation statements)

References 42 publications

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“…For glucose sensing, ZnO nanostructures integrated in various kinds of sensors have demonstrated outstanding properties such as high sensitivity, high selectivity, low limit of detection (LOD), and good biocompatibility. Due to its intense photoluminescent emission at room temperature [3][4][5][6] with a fluorescence quantum yield of approximately 0.45 [7,8], its high isoelectric point (IEP) of about 9.5 enabling the adsorption of low IEP materials like proteins or glucose [9], and especially its photo-oxidation property [10,11], ZnO nanostructures have been successfully implemented in fluorescent glucose probes [12][13][14][15][16]. Kim et al, Sodzel et al, and Sarangi et al are pioneers who developed glucose sensors, which can measure glucose concentration through the PL quenching of ZnO nanocrystals [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Au nanoparticle–decorated ZnO nanorods as fluorescent non-enzymatic glucose probe

Hong

Janssens

2020

Microchim Acta

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ZnO nanorods (NRs) synthesized by a hydrothermal method and decorated with Au nanoparticles (NPs) were used for fluorescent non-enzymatic glucose detection. The detection is based on the photoluminescence (PL) quenching of ZnO NRs/Au NPs (at 382 nm under 325 nm excitation) exposed to glucose. The sensor exhibits a high sensitivity of (22 ± 2) % mM -1 (defined as percentage change of the PL peak intensity per mM) and a limit of detection (LOD) as low as 0.01 mM, along with an excellent selectivity and a short response time (less than 5 s). In comparison with a fluorescent non-enzymatic ZnO nanostructure-based glucose sensor, the addition of Au NPs significantly enhances the sensitivity. This is attributed to the surface plasmon resonance, which not only increases the photoluminescence intensity but also the photo-oxidation property of the ZnO NRs. Thus, ZnO NRs/Au NPs can act as an efficient photocatalyst for glucose detection. Most importantly, the applicability for glucose detection in human blood serum demonstrates the accuracy of the probe. The outstanding performance of the material and its cost effectiveness allow for application in single-use, non-invasive glucose devices.

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Section: Introductionmentioning

confidence: 99%

Au nanoparticle–decorated ZnO nanorods as fluorescent non-enzymatic glucose probe

Hong

Janssens

2020

Microchim Acta

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“…For ZnS thin films, emission bands at 397 and 498 nm were observed, and for ZnO thin films, emissions bands at 389 and 504 nm were observed. The emissions at 397 and 389 nm are attributed to the well‐known near band edge (NBE) emission of the wide band gap of semiconductors, and mainly comes from the exciton recombination of the photo‐generated holes in the valence band and the electrons in the conduction band through an exciton–exciton collision process when the materials are chemically synthesized at nano scale . The emissions at 498 and 504 nm are attributed to the zinc interstitial and oxygen vacancy related to defect levels which act as luminescence centers for the deposited thin films .…”

Section: Resultsmentioning

confidence: 99%

Nanocrystalline and monophasic thin films of metal chalcogenide (FeS, ZnS) and oxide (ZnO) by chemical bath deposition (CBD)

Akhtar

Mehmood

Ahmad

et al. 2017

Phys. Status Solidi A

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FeS, ZnS, and ZnO nanostructured thin films have been deposited by Chemical Bath Deposition (CBD), a simple and cost effective technique. These materials with different morphologies such as nano‐flakes, nanoparticles and nanorods for FeS, ZnS, and ZnO, respectively were deposited onto the glass substrates. The crystallite sizes have been estimated from Scherrer's equation and were found to be 14 nm for nano‐flakes of FeS, 9.09 nm for nanoparticles of ZnS, and 49 nm for nanorods of ZnO. The average values of the band gaps were found to be 1.97, 3.43, and 3.74 eV for FeS, ZnO, and ZnS thin films, respectively. These nanostructured semiconducting materials have wide applications in advanced optoelectronic devices.

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“…LDHs, due to their layered morphology with different exchangeable solute species intercalated in the interlamellar space, can extract solute ions from water through a variety of chemical‐physical reactions 10 . These include precipitation of metal hydroxides onto the surface but also isomorphic substitution in the crystalline sheet structure, as it was also demonstrated in metal oxides 11 . However, all the previous investigations have considered metal adsorption by LDH powders, which were dispersed or directly synthesized by coprecipitation in the contaminated water solution.…”

Section: Introductionmentioning

confidence: 98%

“…10 These include precipitation of metal hydroxides onto the surface but also isomorphic substitution in the crystalline sheet structure, as it was also demonstrated in metal oxides. 11 However, all the previous investigations have considered metal adsorption by LDH powders, which were dispersed or directly synthesized by coprecipitation in the contaminated water solution.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of heavy metals by layered double hydroxides grown in situ on Al foam

Kačiulis

Bolli

Varone

et al. 2020

Surface & Interface Analysis

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We investigated the adsorption of heavy metal ions on a nanostructured coating of zinc-aluminum layered double hydroxides (Zn-Al LDHs) grown on aluminum foam by one-step hydrothermal process. This approach aimed to increase the interactive surface and provide a more practical medium for removal of toxic heavy metals from aqueous media. The foam coated with LDH was characterized by using scanning electron microscopy and X-ray diffraction. After immersion in a copper-rich water solution, X-ray photoelectron spectroscopy demonstrated the occurrence of adsorbed copper on the LDH-coated foam with two oxidation states: particles of metallic copper Cu 0 with oxidized surface Cu +1. X-ray diffraction showed the presence of Cu +2 in the LDH structure.

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Structural and optical properties of dense vertically aligned ZnO nanorods grown onto silver and gold thin films by galvanic effect with iron contamination

Cited by 19 publications

References 42 publications

Au nanoparticle–decorated ZnO nanorods as fluorescent non-enzymatic glucose probe

Au nanoparticle–decorated ZnO nanorods as fluorescent non-enzymatic glucose probe

Nanocrystalline and monophasic thin films of metal chalcogenide (FeS, ZnS) and oxide (ZnO) by chemical bath deposition (CBD)

Adsorption of heavy metals by layered double hydroxides grown in situ on Al foam

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