Heterostructures based on Pd–Au nanoparticles and cobalt phthalocyanine for hydrogen chemiresistive sensors

Николаева, Н. С.; Klyamer, Darya; Жарков, С. М.; Tsygankova, Alphiya R.; Sukhikh, A. S.; Morozova, N. B.; Basova, Tamara V.

doi:10.1016/j.ijhydene.2021.03.082

Cited by 16 publications

(7 citation statements)

References 67 publications

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“…Au nanoparticles were deposited by pulsed metal-organic chemical vapor deposition (pulsed-MOCVD) on Si, Ti alloy, and Pt-, Ir-, and PtIr-coated Ti-alloy substrates (hereafter Au(Si), Au, Au/Pt, Au/Ir, and Au/PtIr, respectively) from [(CH 3 ) 2 Au(thd)] in the reactor described in our previous work [32]. The experimental parameters were fixed as follows: the deposition temperature was 250 • C; the evaporator temperature was 70 • C (the saturated vapor pressure is given by the equation ln(p, atm) = 36.61 − 15,231/T(K) [33]); the ratio of reactant gaseous mixture (Ar/H 2 ) was 2; the total reactor pressure was~8 Torr, the number of cycles was 10.…”

Section: Deposition Of Ir Pt and Irpt Metal Coatings And Au And Ag Nanoparticlesmentioning

confidence: 99%

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

et al. 2021

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This work is aimed at developing the modification of the surface of medical implants with film materials based on noble metals in order to improve their biological characteristics. Gas-phase transportation methods were proposed to obtain such materials. To determine the effect of the material of the bottom layer of heterometallic structures, Ir, Pt, and PtIr coatings with a thickness of 1.4–1.5 μm were deposited by metal–organic chemical vapor deposition (MOCVD) on Ti6Al4V alloy discs. Two types of antibacterial components, namely, gold nanoparticles (AuNPs) and discontinuous Ag coatings, were deposited on the surface of these coatings. AuNPs (11–14 nm) were deposited by a pulsed MOCVD method, while Ag films (35–40 nm in thickness) were obtained by physical vapor deposition (PVD). The cytotoxic (24 h and 48 h, toward peripheral blood mononuclear cells (PBMCs)) and antibacterial (24 h) properties of monophase (Ag, Ir, Pt, and PtIr) and heterophase (Ag/Pt, Ag/Ir, Ag/PtIr, Au/Pt, Au/Ir, and Au/PtIr) film materials deposited on Ti-alloy samples were studied in vitro and compared with those of uncoated Ti-alloy samples. Studies of the cytokine production by PBMCs in response to incubation of the samples for 24 and 48 h and histological studies at 1 and 3 months after subcutaneous implantation in rats were also performed. Despite the comparable thickness of the fibrous capsule after 3 months, a faster completion of the active phase of encapsulation was observed for the coated implants compared to the Ti alloy analogs. For the Ag-containing samples, growth inhibition of S. epidermidis, S. aureus, Str. pyogenes, P. aeruginosa, and Ent. faecium was observed.

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Section: Deposition Of Ir Pt and Irpt Metal Coatings And Au And Ag Nanoparticlesmentioning

confidence: 99%

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

et al. 2021

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“…For instance, the incorporation of metallic aggregates in polymeric matrices enhances sensing via the optical and electrical response due to the high surface-to-volume ratio of nanoparticles . By way of illustration, functionalization of glassy carbon electrodes with ferrocene-terminated poly(amidoamine) dendrimers encapsulated with gold nanoparticles promoted high sensitivity and stability in detecting 4-aminophenol, and cobalt phthalocyanine films modified with palladium and gold nanoparticles improved the performance of chemiresistive sensors for hydrogen . In these examples, the enhancement mechanism can be related to the functional groups of the coating, to an increase in the surface area, modifications of the conductive path, and geometric parameters. , The incorporation of metallic nanoparticles in sensors can enhance their specificity, sensitivity, and selectivity, − but an independent control of the nanoparticle synthesis and deposition to fine-tune the device response is still a technological bottleneck.…”

Section: Introductionmentioning

confidence: 99%

Controlled Incorporation of Silver Nanoparticles into Layer-by-Layer Polymer Films for Reusable Electronic Tongues

Hensel

Braunger

Oliveira

et al. 2021

ACS Appl. Nano Mater.

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The incorporation of metallic nanoparticles in sensors and biosensors normally enhances performance, but fabricating reproducible sensing units is still an issue owing to the poor control of their electrical properties. In this article, we exploit the controlled deposition of silver nanoparticles (NP) preformed in a gas phase into layer-by-layer (LbL) films of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrenesulfonate) (PSS) (PAH/PSS) assembled on gold interdigitated electrodes (IDEs). In situ impedance measurements during NP deposition allowed monitoring of the electrical response evolution, and reproducible sensing units could be made with tailored characteristics by varying the deposition time. In proof-of-principle experiments, we employed an array with four sensing units in an electronic tongue (e-tongue), which was capable of distinguishing basic flavors of the human palate and diverse commercial umami-based flavor enhancers. Using statistical analysis methods, it was possible to identify ways to optimize the e-tongue performance, thus confirming the possibility to explore controlled changes in electrical response via nanoparticle incorporation. It is worth noting that the methodology can be extended to produce other polymer–metallic NP composites and modify the electrical behavior of films in a controlled, reproducible manner, opening the way for enhanced optoelectronic devices, not limited to sensors or biosensors.

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“…As is already known, active sensing semiconductor materials, 3 the optimized microstructure of the active layers 4,5 and advanced device preparation 6,7 usually achieve a good sensing performance with a high sensitivity and selectivity. Among the sensing semiconductor materials, the sandwichtype phthalocyanine family has attracted extensively research interest because of the excellent charge transport properties, easy modulation of the frontier molecular orbital energy levels, and quite good solubility in common organic solvents [8][9][10][11] which allow low-cost and large-area devices to be fabricated by solution-based methods such as spin coating, 12 molecular assemblies, 13 Langmuir, 14,15 and quasi-Langmuir-Sha ¨fer (QLS) techniques, 16 and so on.…”

Section: Introductionmentioning

confidence: 99%

Discrimination and detection of NO₂, NH₃ and H₂S using sensor array based on three ambipolar sandwich tetradiazepinoporphyrazinato/phthalocyaninato europium double-decker complexes

Kong

Tarakanova

et al. 2023

Mater. Adv.

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Heterostructures based on Pd–Au nanoparticles and cobalt phthalocyanine for hydrogen chemiresistive sensors

Cited by 16 publications

References 67 publications

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Controlled Incorporation of Silver Nanoparticles into Layer-by-Layer Polymer Films for Reusable Electronic Tongues

Discrimination and detection of NO₂, NH₃ and H₂S using sensor array based on three ambipolar sandwich tetradiazepinoporphyrazinato/phthalocyaninato europium double-decker complexes

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Heterostructures based on Pd–Au nanoparticles and cobalt phthalocyanine for hydrogen chemiresistive sensors

Cited by 16 publications

References 67 publications

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Controlled Incorporation of Silver Nanoparticles into Layer-by-Layer Polymer Films for Reusable Electronic Tongues

Discrimination and detection of NO2, NH3 and H2S using sensor array based on three ambipolar sandwich tetradiazepinoporphyrazinato/phthalocyaninato europium double-decker complexes

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Discrimination and detection of NO₂, NH₃ and H₂S using sensor array based on three ambipolar sandwich tetradiazepinoporphyrazinato/phthalocyaninato europium double-decker complexes