Database for the Microstructure of Plated Films

Watanabe, Tohru

doi:10.1016/b978-008044375-1/50016-6

Cited by 6 publications

(8 citation statements)

References 165 publications

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“…Solution stability can be also directly reflected via the surface irregularities or nodules. 14 The nodule, a semi-spherical protrusion appearing on the surface of plated films, are usually connected to the pre-existing etched surface irregularities or flow rate of solution. 14 Figure 4 shows the surface morphologies of Ni–P films deposited at bath pH values of 5, 6, 7, 8 and 9.…”

Section: Resultsmentioning

confidence: 99%

Pre-treatment and electroless Ni–P deposition for surface-modification of tungsten fibres

Yuan

Zhuo

2017

Surface Engineering

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In order to improve the surface activity of tungsten fibres (W f ) for subsequent sintering with adjacent powders of W and Cu, autocatalytic Ni-P coatings on W f were fabricated via electroless deposition in this work. Before electroless deposition, optimal pre-treatment of W f was determined to increase their surface activity without destroying their internal structure. Afterwards, the deposition rate, microstructure and phase constituents of the plated Ni-P coatings at bath pH values of 5, 6, 7, 8 and 9 were studied systematically. SEM observations showed the presence of uniform and compact grains in the coating and XRD analysis revealed their amorphous or partially crystalline structure. Further sintering of W f with powders of W and Cu demonstrated the superior interfacial bonding state due to the Ni-P coatings on the W f surface.

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Section: Resultsmentioning

confidence: 99%

Pre-treatment and electroless Ni–P deposition for surface-modification of tungsten fibres

Yuan

Zhuo

2017

Surface Engineering

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“…In basic media, the half-cell reaction for oxygen evolution at the anode electrode is described by eq Ni and Co (hydr)oxide films have been prepared by sol–gel, thermal decomposition, solution casting, electrodeposition and other methods. − The overall composition, Co or Ni content, thickness, morphology and the way the films are attached to the electrodes are a function of the preparation methods, and determine the activity and stability of the catalysts. Generally, it is easier to control the film thickness and particle size by electrodeposition . CoO x films formed by oxidative electrodeposition from Co II solution in the presence of inorganic phosphate, borate, and other buffered electrolytes have been studied by Nocera and co-workers. − Their work, together with the study by Gerken et al, have provided insights into the catalytic water oxidation mechanism using a CoO x film, and led to the proposal that the O–O bond formation step involves the reaction of water with oxo Co IV .…”

Section: Introductionmentioning

confidence: 99%

Lindqvist Polyoxoniobate Ion-Assisted Electrodeposition of Cobalt and Nickel Water Oxidation Catalysts

Liu

Guo

Ding

et al. 2015

ACS Appl. Mater. Interfaces

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A method has been developed for the efficient electrodeposition of cobalt and nickel nanostructures with the assistance of the Lindqvist ion [Nb6O19](8-). Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma optical emission spectrometry, and a range of electrochemical techniques have been used to characterize the morphology, composition, catalytic water oxidation activity and stability of the films in alkaline solution. SEM images show that films consisting of nanoparticles with diameters of ca. 30 to 40 nm are formed after 40-50 potential cycles of deposition. Nb and Co/Ni are detected in the films by EDX. ICP-MS results show an elemental ratio of 1:1 for Co:Nb and 1:3 for Ni:Nb, respectively. Raman spectra reveal the presence of both [Nb6O19](8-) and Co(OH)2/Ni(OH)2. The films exhibit excellent stability and efficiency for electrocatalytic water oxidation in alkaline solution. Turnover frequencies of 12.9 and 13.2 s(-1) were determined by rotating ring disk electrode voltammetry at an overpotential of 480 mV for Co and Ni films, respectively. Fourier transformed large amplitude alternating current (FTAC) voltammetry reveals an additional underlying oxidation process for Co under catalytic turnover conditions, which indicates that a Co(IV) species is involved in the efficient catalytic water oxidation reactions. FTAC voltammetric data also suggest that the Ni films undergoes a clear phase transformation upon aging in aqueous 1 M NaOH and the electrogenerated higher oxidation state Ni from β-NiOOH is the more active form of the catalyst.

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“…ENDOM is generally applicable to the preparation of metallic, semiconducting, and insulating nanostructures on many technologically relevant substrates. Dimethylamine borane (DMAB) is a versatile reducing agent that can be used to deposit metals including gold, silver, cobalt, palladium, iron, copper, alloys, semiconductors, , and insulators . ENDOM can also be employed using other Lewis acid/base or ionic reducing agents, for example, sodium borohydride, which allows even greater synthesis flexibility.…”

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confidence: 99%

“…Dimethylamine borane (DMAB) is a versatile reducing agent that can be used to deposit metals including gold, silver, cobalt, palladium, iron, copper, alloys, semiconductors, , and insulators . ENDOM can also be employed using other Lewis acid/base or ionic reducing agents, for example, sodium borohydride, which allows even greater synthesis flexibility. Well-ordered SAMs can be on most substrates, from metals to semiconductors to polymers. , Furthermore, the micropatterning of SAMs can be performed using many techniques including UV photopatterning, , electron beam lithography, , dip pen nanolithography, and microcontact printing…”

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confidence: 99%

Synthesis of Nickel Nanowires via Electroless Nanowire Deposition on Micropatterned Substrates

Shi

Walker

2011

Langmuir

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Electroless nanowire deposition on micropatterned substrates (ENDOM) is a promising new technique by which to direct the synthesis and precise placement of metallic nanowires. ENDOM is generally applicable to the preparation of metallic, semiconducting, and even insulating nanowires on technologically relevant substrates, is inexpensive, and can achieve high growth rates. The deposited nanowires are ultralong (centimeters) and can be patterned in arbitrary shapes. We demonstrate ENDOM using the growth of nickel nanowires. By controlling the deposition time, the width of the nanowires can be varied from 200 to 1000 nm and the height can be varied from 7 to 20 nm.

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Database for the Microstructure of Plated Films

Cited by 6 publications

References 165 publications

Pre-treatment and electroless Ni–P deposition for surface-modification of tungsten fibres

Pre-treatment and electroless Ni–P deposition for surface-modification of tungsten fibres

Lindqvist Polyoxoniobate Ion-Assisted Electrodeposition of Cobalt and Nickel Water Oxidation Catalysts

Synthesis of Nickel Nanowires via Electroless Nanowire Deposition on Micropatterned Substrates

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