High-Density and Monodisperse Electrochemical Gold Nanoparticle Synthesis Utilizing the Properties of Boron-Doped Diamond Electrodes

Takemura, Kenshin; Iwasaki, Wataru; Morita, Noriyuki; Ohmagari, Shinya

doi:10.3390/nano12101741

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…In this method, the buffer and electrodeposition voltage are important factors for improving the measurement sensitivity. The pH-optimized NaOAc (0.1 M, pH 5.0) solution was used as the buffer for electrochemical measurements. − (Figure S8). The electrodeposition potential was determined from the electrochemical measurement of 1 ppb of arsenic in the optimized buffer by varying the electrodeposition potential from −0.3 to −1.2 V in steps of −0.1 V (Figure a).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Active Nanoneedle Gold Electrode Using Rose Petals for Electrochemical Detection of Arsenic(III)

Takemura,

Motomura,

Iwasaki

et al. 2023

ACS Appl. Nano Mater.

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Nanoscale fabrication of metal interface structures has been applied to various fields, owing to their conducive electrical and optical properties. Their successful application is typically attributed to their high activity, which originates from their significantly increased specific surface area resulting from the type of nanostructures. The high activity, such as fast electron transfer from nanostructures, increases the efficiency of the electrochemical reactions occurring at the metal interface and improves the detection sensitivity. In this study, highly active gold electrodes with a specific surface topography were fabricated directly from raw rose petals, which have a regular but complex structure. When the fabricated electrode was used as the working electrode of an electrochemical sensor, the sensitivity improved 100-fold in the measurement of arsenic(III), compared to the sensitivity achieved using a smooth gold film. It was demonstrated that the interface structure of the biomaterial could be easily adapted for the fabrication of thin metal surfaces with a complex structure. Thus, using various materials as substrates, it is possible to fabricate functional complex structures that exhibit unique electrochemical and optical properties owing to their large surface areas, interfacial structures, and irregular microstructures, thereby enabling the highly sensitive detection of heavy metals on metallic thin films.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Active Nanoneedle Gold Electrode Using Rose Petals for Electrochemical Detection of Arsenic(III)

Takemura,

Motomura,

Iwasaki

et al. 2023

ACS Appl. Nano Mater.

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“…An AuNP-BDD was prepared according to a previously reported electrochemical deposition method [ 26 ]. The gold nanoparticles were densely packed on a thick BDD film ( Figure S1 ) using a high reduction voltage [ 27 ]. All electrochemical measurements were conducted in a 0.1 M Acetic acid/sodium acetate buffer (AcONa; pH 5, 20 °C).…”

Section: Methodsmentioning

confidence: 99%

Determination of Low Concentrations of Mercury Based on the Electrodeposition Time

Takemura,

Iwasaki,

Morita

et al. 2024

Nanomaterials

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Soil plays a crucial role in human health through its impact on food and habitation. However, it often contains toxic heavy metals, with mercury being particularly hazardous when methylated. Currently, high-sensitivity, rapid detection of mercury is achievable only through electrochemical measurements. These measurements require pretreatment of the soil sample and the preparation of a calibration curve tailored to the sample’s condition. In this study, we developed a method to determine the environmental standard value of mercury content in soil by significantly reducing the pretreatment process. Our approach involves analyzing current peaks from electrodeposition times using specific electrodes and solvent settings. This method demonstrates low error rates under low concentration conditions and can detect mercury levels as low as 0.5 ppb in soil leachate and reagent dilution series. This research facilitates the determination of low mercury concentrations in solutions containing various soil micro-compounds without the need for calibration curves.

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“…A Review on Cyclic Voltammetric Investigation of Toxic Heavy Metals DOI: http://dx.doi.org/10.5772/intechopen.108411 of As causes lung and skin cancer along with negative impacts on cognitive development and increased deaths [27]. Therefore, detection of arsenic in the environment is important for maintaining public health.…”

Section: Electrochemical Determination Of Arsenic (As) Using Cyclic V...mentioning

confidence: 99%

A Review on Cyclic Voltammetric Investigation of Toxic Heavy Metals

Rajendrachari¹,

Kiran²,

Mahale³

et al. 2023

Frontiers in Voltammetry

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Heavy metals are one of the toxic pollutants threatening the human kind by causing various health issues. The detection of such polutants are of important environmental concern and we need a real-time monitoring equipment. Many researchers have established a number of approaches for the detection of these heavy metals so far. But, the development of one time use sensors for the quick, and real time detection of toxic heavy metals is in great demand. The electrochemical methods like cyclic voltammetry, is proved to be one of the best and popular methods, and are preferred over other electrochemical methods because of its high sensitivity, selectivity, anti-fouling, quick and accurate detection. In the present book chapter, we will discuss the various modifiers used to detect the arsenic, cadmium, and lead heavy metals using cyclic voltammetry.

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High-Density and Monodisperse Electrochemical Gold Nanoparticle Synthesis Utilizing the Properties of Boron-Doped Diamond Electrodes

Cited by 9 publications

References 36 publications

Fabrication of Highly Active Nanoneedle Gold Electrode Using Rose Petals for Electrochemical Detection of Arsenic(III)

Fabrication of Highly Active Nanoneedle Gold Electrode Using Rose Petals for Electrochemical Detection of Arsenic(III)

Determination of Low Concentrations of Mercury Based on the Electrodeposition Time

A Review on Cyclic Voltammetric Investigation of Toxic Heavy Metals

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