Chemical and Electrochemical Synthesis of Platinum Black

Stanca, Sarmiza Elena; Hänschke, F.; Ihring, Andreas; Zieger, Gabriel; Dellith, Jan; Kessler, E.; Meyer, H.‐G.

doi:10.1038/s41598-017-01040-8

Cited by 25 publications

(22 citation statements)

References 18 publications

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“…It was demonstrated that platinum black can be electroc–hemically synthesized in non-aqueous media 16 . On this basis, a sub-visible-wavelength thick layer of platinum black in isopropanol is electrochemically constructed (§Methods).…”

Section: Discussionmentioning

confidence: 99%

“…Electrolysis times varying from 30 s to 300 s have been examined, and it was found that 90 s represents the optimum one for compact layers of 100 nm thickness. In aqueous media the electro-assembling of platinum black on cathodes of different materials is prepared as described in our previous work 16 . Electrolytic bath: 0.05 g PtCl 4 and 0.008 g Pb(CH 3 COO) 2 dissolved in 10 mL water.…”

Section: Methodsmentioning

confidence: 99%

“…NaBH 4 solution is added in drops to the platinum salt solution. A black colour of the dispersion indicates the end of the synthesis 16 .…”

Section: Methodsmentioning

confidence: 99%

“…However, silver black displays an undesired chemical reactivity to air components 13,14 , hindering its long term stability of performance, which is important for microelectronics technology. Our alternative is to utilize platinum black, which together with a broad absorbance and low reflectance from ultraviolet to infrared region 15,16 exhibits the required chemical stability in air. In most cases, the insertion of the optical absorber in the construction of microelectronics requires a non-aqueous media for operation and a prospective that the material can be brought into a thin-layer.…”

Section: Introductionmentioning

confidence: 99%

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Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

Stanca

Hänschke

Zieger

et al. 2017

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Optoelectronic technology has been increasingly driven towards miniaturization. In this regard, maintaining the optical properties of the bulk materials while reducing their size is a critical need. How thin must the film be to preserve the bulk material´s optical absorbance and reflectance characteristics? This is the central question for our study of the in situ electro-assembly broad band optical absorber films of platinum in non-aqueous solution of PtCl4. By reducing the in situ constructed film to sub-visible-wavelength thicknesses, the measured reflectance in the region from the ultraviolet to the infrared remained close to that exhibited by the micrometre-width films. These platinum black films broadly absorb electromagnetic waves at a sub-incident-wavelength thickness owing to their plasmonically increased absorbance cross-section. Simulation of various incident energy electron trajectories gives insights into the electron depth through the porous platinum black of ρ = 1.6 g/cm3 and previews the optical behaviour close to the atomic thickness.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…NaBH 4 solution is added in drops to the platinum salt solution. A black colour of the dispersion indicates the end of the synthesis 16 .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

Stanca

Hänschke

Zieger

et al. 2017

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“…Platinum black deposition solution was prepared by mixing 1% chloroplatinic acid and 0.05% lead acetate in DI water. The mixture was then stirred and 0.0025% of 32% hydrochloric acid was added to the mixture (Stanca et al 2017). The prepared solution was covered with aluminum foil and stored at room temperature.…”

Section: Preparing Platinum Black Deposition Solutionmentioning

confidence: 99%

A platinum black-modified microelectrode for in situ olanzapine detection in microliter volumes of undiluted serum

et al. 2020

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Olanzapine is a thienobenzodiazepine compound. It is one of the newer types of antipsychotic drugs used in the treatment of schizophrenia and other psychotic disorders. Several methods have been reported for analyzing olanzapine in its pure form or combined with other drugs and in biological fluids. These methods include high-performance liquid chromatography and liquid chromatography-tandem mass spectroscopy. Although many of the reported methods are accurate and sensitive, they require the use of sophisticated equipment, lack in situ analysis, and require expensive reagents. Moreover, several of these methods are cumbersome, require prolonged sample pretreatment, strict control of pH, and long reaction times. Here we present the development of a miniaturized electrochemical sensor that will enable minimally invasive, real-time, and in situ monitoring of olanzapine levels in microliter volumes of serum samples. For this purpose, we modified a microfabricated microelectrode with a platinum black film to increase the electrocatalytic activity of the microelectrode towards olanzapine oxidation; this improved the overall selectivity and sensitivity of the sensor. We observed in recorded voltammograms the anodic current dose response characteristics in microliter volumes of olanzapine-spiked serum samples that resulted in a limit of detection of 28.6 ± 1.3 nM and a sensitivity of 0.14 ± 0.02 µA/cm 2 nM. Importantly, the platinum black-modified microelectrode exhibited a limit of detection that is below the clinical threshold (65-130 nM). Further miniaturizing and integrating such sensors into point-of-care devices provide real-time monitoring of olanzapine blood levels; this will enable treatment teams to receive feedback and administer adjustable olanzapine therapy.

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Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

et al. 2020

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The creation of open porous structures with an extremely high surface area is of great technological relevance. The electrochemical deposition of metal foams around co‐generated hydrogen bubbles that act as templates for the deposition is a promising, cheap and simple approach to the fabrication of new electrocatalyst materials. Metal foams obtained by dynamic hydrogen bubble templating (DHBT) offer an intrinsically high electrical conductance with an open porous structure that enables the fast transport of gases and liquids. As an additional benefit, the confined space within the pores of DHBT metal foams may act as small reactors that can harbour reactions not possible at an open electrode interface. The number, distribution, and size of the pores can be fine‐tuned by an appropriate choice of the electrolysis parameters so that metal foam catalysts prepared by the DHBT technique meet certain requirements. In this paper, we review the preparation of certain metal foams, and their applications as catalysts for the electrochemical reduction of CO2.

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Chemical and Electrochemical Synthesis of Platinum Black

Cited by 25 publications

References 18 publications

Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

A platinum black-modified microelectrode for in situ olanzapine detection in microliter volumes of undiluted serum

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

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Chemical and Electrochemical Synthesis of Platinum Black

Cited by 25 publications

References 18 publications

Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

Optical Assets of In situ Electro-assembled Platinum Black Nanolayers

A platinum black-modified microelectrode for in situ olanzapine detection in microliter volumes of undiluted serum

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO2 Electroreduction

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Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction