Interfacial Synthesis of Two-Dimensional Dendritic Platinum Nanoparticles Using Oleic Acid-in-Water Emulsion

Jung, Eui-Geun; Shin, Yong‐Cheol; Lee, Minzae; Yi, Jongheop; Kang, Taewook

doi:10.1021/acsami.5b02433

Cited by 30 publications

(18 citation statements)

References 33 publications

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“…Recently, nanoelectrodes have become an interested trend in electrochemical research because of their advantages such as increased mass transport, rapid electron transfer and high surface‐to‐volume ratio, high adsorption capacity . They have been prepared in various shapes including sphere , cube , polyhedron , and wire .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Nguyen

Cao²,

Pham

et al. 2019

Electroanalysis

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Platinum nanoflowers modified glassy carbon electrodes (PtNFs/GCE) was fabricated simply for lead determination in water samples. The modified electrodes were prepared by electrodeposition in hexachloroplatinic acid solution at constant potential. The influence of deposition time and potential on surface morphology, chemical composition, electrochemical properties of electrode were investigated. At À 0.2 V of potential and 150 s of deposition duration, platinum developed as nanoflower shape and scattered densely all over the glassy carbon surface, producing the largest electrochemically active surface areas. The highest differential pulse stripping voltammetry (DPSV) signal of lead was obtained by using the prepared electrode. Under optimized experimental condition of electrolyte, accumulation potential and time, the peak current was found to be linear proportion to lead concentration in range of 1 to 100 μg L À 1 (slope = 0.371) with a limit of detection of 0.398 μg L À 1 . The method has good repeatability and reproducibility with relative standard deviations of 1.47 % and 4.83 %, respectively. The modified PtNFs/GCE also demonstrated an excellent long-term stability with only 9 % decrease in Pb peak current over 30 days. Moreover, the performance of the modified PtNFs/GCE in determination of Pb(II) in two industrial wastewaters was good agreement with data obtained by a graphite furnace atomic absorption spectrometry (GFAAS) method.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Nguyen

Cao²,

Pham

et al. 2019

Electroanalysis

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“…Non-spherical nanoparticles, especially hyperbranched nanoparticles, benefiting from further increased specific surface area and ultrahigh performance in catalysis, [49] have become a hot spot in the area. Non-spherical nanoparticles, especially hyperbranched nanoparticles, benefiting from further increased specific surface area and ultrahigh performance in catalysis, [49] have become a hot spot in the area.…”

Section: Introductionmentioning

confidence: 99%

“…Although numerous investigations were previously conducted, the nanoparticles were mostly assumed as spheres and the geometric effects of the nanoparticles were barely discussed. Non-spherical nanoparticles, especially hyperbranched nanoparticles, benefiting from further increased specific surface area and ultrahigh performance in catalysis, [49] have become a hot spot in the area. In this work, we synthesized novel PdÀ Ag hyperbranched alloy nanoparticles and investigated their electrocatalytic activities to a common hydrogen peroxide (H 2 O 2 ) reduction reaction as a model system, which could yield easily detectable results under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Hydrogen Peroxide by Pd−Ag Nanoparticles Based on the Collisional Approach

Zhang

et al. 2018

ChemElectroChem

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Particles collision onto a surface or an interface is a novel electrochemical approach, which can be used to investigate the behavior of single entities. Benefiting from advantages including single particle/single event resolution, label-free detection and high sensitivity, this technique has been widely employed in the study of electrocatalytic amplification of detection signal by nanoparticles. Herein, we report the investigation of the collisional electrocatalytic behaviors of novel PdÀ Ag hyperbranched nanoparticles through the observation of catalysis of hydrogen peroxide (H 2 O 2 ) oxidation. The newly prepared PdÀ Ag hyperbranched nanoparticles have been characterized by cyclic voltammetry and surface techniques. They can obviously reduce the overpotential of the reduction of H 2 O 2 and show the high electrocatalytic activity. When the nanoparticles collide onto the electrode via the Brownian random motion, electrocatalytic reaction occurs and results in significant current increases, which could provide information about nanoparticles and electrochemical reactions. Furthermore, concentration and potential dependence are also investigated in detail, which confirms the reliability and universality of this methodology as an ultra-sensitive probe. Based on these results, it is clearly shown that such platform is promising in further applications for biosensing and single nanoparticle analysis.

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“…However, building a fractal metasurface of noble metal often requires liftoff process, which is complex and expensive. Recently, Jung et al proposed a scalable synthesis method of 2D fractal Pt NPs with oleic‐acid‐in‐water emulsion . It provides a convenient way to improve the performance of Gr–Si detectors.…”

Section: Introductionmentioning

confidence: 99%

High and Fast Response of a Graphene–Silicon Photodetector Coupled with 2D Fractal Platinum Nanoparticles

Huang

Yan

et al. 2017

Advanced Optical Materials

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However, the main drawback of chemical doping methods is the instability of molecular dopants, which would weaken the enhancement during storage. [5] Besides, chemical doping may even damage Gr. [6] Thereby, chemical doping methods are not suitable for the practical application of GrSi PDs.Since intensive plasmons can be aroused inside transition metals, the utilization of clusters of transition metal for the enhancement of photovoltaic devices has already been reported. [7] Recently, charge transfer between Gr and metal nanoparticles (NPs) has also been demonstrated in Gr-based optoelectronic devices. [8] It is believed that the NPs of high work function metal can effectively dope Gr with nonequilibrium holes and tune the Fermi level of Gr. Previously, we demonstrated that coupling Gr with platinum (Pt) NPs can significantly improve absorption of Gr-Si solar cells. [9] However, metal NPs agglomerate easily due to their large surface area. When NPs form large clusters, they will block the incident light instead of enhancing the absorption. There are some reports which proposed polystyrene-sphere methods to fabricate NPs array, [8a,10] but the fabrication process limits the morphology of NPs. Therefore, modification of metal NPs is needed to maximize the absorption enhancement.Moreover, with metal nanostructure or even metal fractal metasurface, [11] absorption of Gr-Si detectors can be improved even more. However, building a fractal metasurface of noble metal often requires liftoff process, which is complex and expensive. Recently, Jung et al. proposed a scalable synthesis method of 2D fractal Pt NPs with oleic-acid-in-water emulsion. [12] It provides a convenient way to improve the performance of Gr-Si detectors. 2D fractal Pt NPs can offer plasmonic enhancement that is similar to a fractal metasurface. On the other hand, the extensive morphology of NPs is helpful in getting a uniform film instead of aggregation. [13] This ensures maximal plasmonic enhancement. We can even modify the synthesis method to change the morphology of NPs to meet different requirements on detectors. Therefore, it would be interesting to investigate the enhancement on Gr-Si detectors with fractal NPs.In this work, we report the fabrication and characterization of fractal Pt NPs coupled Gr-Si PDs. With modified emulsion method, we can massively synthesized 2D fractal Pt NPs. With

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Interfacial Synthesis of Two-Dimensional Dendritic Platinum Nanoparticles Using Oleic Acid-in-Water Emulsion

Cited by 30 publications

References 33 publications

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Electrocatalytic Reduction of Hydrogen Peroxide by Pd−Ag Nanoparticles Based on the Collisional Approach

High and Fast Response of a Graphene–Silicon Photodetector Coupled with 2D Fractal Platinum Nanoparticles

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