Synthesis of Nickel Nanowires via Electroless Nanowire Deposition on Micropatterned Substrates

Shi, Zhiwei; Walker, Amy V.

doi:10.1021/la2025878

Cited by 19 publications

(22 citation statements)

References 25 publications

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“…Acyclovir bears two major groups of the guanine analog and the first-type alcohol. As a guanine derivative, acyclovir can be oxidized to the corresponding oxoguanine analog: 31,32 (10) In addition, as a primary alcohol, acyclovir, can also be oxidized to the corresponding aldehyde and/or carboxylic acid on nickel-based electrodes: 33 (11) (12) Figure 5 shows cyclic voltammograms of MCPE/Nf in a range of potential sweep rates of 2 to 100 mV s -1 in the presence of 300 μmol L -1 acyclovir. Upon increasing the potential sweep rate, the anodic peak current increased, and depended linearly on the square root of the potential sweep rate (Fig.…”

Section: Study Of the Electrocatalytic Oxidation Of Acyclovir On The mentioning

confidence: 99%

“…In this regards, a variety of nanostructured nickel-based materials with different morphologies, such as nanowires, nanorods, nanotubes, nanowhiskers, and nanoparticles, have been successfully synthesized. [7][8][9][10][11][12] In particular, the design and fabrication of nanoporous (including microporous, mesoporous and macroporous materials) nickel-based materials have attracted considerable attention in recent years. [13][14][15][16][17] Micro-and nanoemulsions as new micro-reactors have been widely used in the production of metallic nanoparticles, semiconductor, metal oxides and nanometer-scale magnetic particles.…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

2012

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Experimental Reagents and chemicalsAll other chemicals used in this work (otherwise those stated) were of analytical grade from Merck, and were used without further purification. Carbon micro-particles (graphite fine powder) with a particle size of less than 50 μm were obtained from Merck. Nafion solution was purchased from Sigma. All of the solutions were prepared by redistilled water. Acyclovir 2012 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. Nickel microspheres were synthesized via a water-in-oil reverse nanoemulsion system using nickel nitrate as the nickel precursor and hydrazine hydrate as the reducing agent. The nanoemulsion was a triton X-100/cyclohexane/water ternary system. The surface morphology of the nickel microspheres was studied by scanning electron microscopy, which indicated that the microspheres had a nanoporous structure. The electrochemical behavior of the nanoporous nickel microspheres were studied in alkaline solution and were then employed to fabricate a modified carbon paste electrode in order to investigate the electrocatalytic oxidation of the drug acyclovir. The oxidation process involved, and its kinetics were investigated using cyclic voltammetry and chronoamperometry. The rate constant of the catalytic oxidation of acyclovir and the electron-transfer coefficient are reported. A sensitive, simple and time-saving amperometric procedure was developed for the analysis of acyclovir. The proposed amperometric method was also applied to determine acyclovir in tablets and topical cream.

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Section: Study Of the Electrocatalytic Oxidation Of Acyclovir On The mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

2012

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“…ELD is a simple, cheap and soft method in which metallization occurs via the chemically promoted reduction of metal ions without application of an externally applied potential [272][273][274][275][276].…”

Section: Deposition Of the Top Contact Electrodementioning

confidence: 99%

Nanofabrication techniques of highly organized monolayers sandwiched between two electrodes for molecular electronics

2014

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Molecular electronics [1,2] is a promising field of research based on the idea that a single molecule or two dimensional assemblies of molecules (monomolecular films) can work as wires, switches, rectifiers, etc. Molecules are the smallest functional units and therefore it is expected that the use of molecules will permit to catch up with the limits of miniaturization (MM: more Moore), with an increase in device density by a factor of several orders of magnitude compared to today's state of the art. At the same time due to quantum effects novel and remarkable properties of organic and organometallic compounds at the nanoscale devices will result in increased performance (MtM: more than Moore) together with the appearance of new functions not possible with conventional semiconductors, and also cheaper devices due to the non-dependence of expensive materials used today in CMOS (complementary metal-oxide semiconductor) technology such as hafnium oxide. Nowadays, the number of research groups from different disciplines of science contributing to molecular electronics is gradually growing, and this field is becoming of great scientific and technological interest [1,3-8]. Since the seminal work of Aviram and Ratner in 1974 who firstly suggested that a single molecule could function as a rectifier [9], molecules have been experimentally demonstrated to work as switches, molecular wires or rectifiers, and a new field of opportunities is opened due to the understanding of electron transport through single entities or assemblies of molecules and expansion towards work on molecular spintronics, vibronic effects, excitation of the molecular junction with polarized light, quantum interference and decoherence, molecular chirality, molecular stretching and distortion as well as work on thermoelectric response in molecular junctions.Abstract: It is expected that molecular electronics, i.e., the use of molecules as critical functional elements in electronic devices, will lead in the near future to an industrial exploitable novel technology, which will open new routes to high value-added electronic products. However, despite the enormous advances in this field several scientific and technological challenges should be surmounted before molecular electronics can be implemented in the market. Among these challenges are the fabrication of reliable, robust and uniform contacts between molecules and electrodes, the deposition of the second (top) contact electrode, and development of assembly strategies for precise placement of molecular materials within device structures. This review covers advances in nanofabrication techniques used for the assembly of monomolecular films onto conducting or semiconducting substrates as well as recent methods developed for the deposition of the top contact electrode highlighting the advantages and limitations of the several approaches used in the literature. This contribution also aims to define areas of outstanding challenges in the nanofabrication of monomolecular layers sandwiched between two electro...

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“…By controlling the atomic layer epitaxial growth and redundant deposition, monolayer lms 6,9 have been prepared by electrodeposition due to facile preparation and high productivity. Accordingly, superhydrophobic materials, 10 and porous materials for fuel cells, 11,12 oil-water separation, 13 and anti-fouling 14 lms, and some other kinds of functional material 15,16 have been fabricated by electrodeposition or chemical deposition. With increasing emphasis on the deposition of ultrathin lms 5,6,9,17 and nanostructures, 8,18 it is critically important to advance the scientic understanding of the kinetics and mechanisms of nucleation and the growth process.…”

Section: Introductionmentioning

confidence: 99%

Ni–P synergetic deposition: electrochemically deposited highly active Ni as a catalyst for chemical deposition

Zeng

et al. 2015

RSC Adv.

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The nucleation mechanism of the preparation of a Ni-P deposit by the synergetic effect of electrochemical deposition and chemical deposition was studied using an electrochemical analysis method. Cathode polarization and chronoamperometry were performed to explore the effect of the reducing reaction (chemical deposition) on the electrochemical Ni deposition. It was found that the addition of reducing agent to the solution induced depolarization phenomena and decreased or removed the double electric layer capacitance. The chronoamperometry experimental data were analyzed and fitted according to the Scharifker-Hills rule to discover the difference in mechanism between the Ni nucleation and Ni-P nucleation. The morphology of Ni-P and the pure Ni deposits was measured by TEM and SEM demonstrating the ball-like particle shape of Ni-P and flat pure Ni deposits. Based on these experimental results, the nucleation mechanism was illustrated in which the active Ni atoms, produced by electrochemical deposition, act as a catalyst for the reduction of the nickel ions with the reducing agent NaH 2 PO 2 on the cathode surface. The occurrence of the reducing reaction of the nickel ions with NaH 2 PO 2 hindered the in-plane growth of crystalline nickel particles, generating the ball-like particle shape of the deposit. This work provides researchers new insights into the nucleation and growth process of synergetic deposition and offers novel ideas for the fabrication of functional materials by liquid deposition.

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Synthesis of Nickel Nanowires via Electroless Nanowire Deposition on Micropatterned Substrates

Cited by 19 publications

References 25 publications

Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

Nanofabrication techniques of highly organized monolayers sandwiched between two electrodes for molecular electronics

Ni–P synergetic deposition: electrochemically deposited highly active Ni as a catalyst for chemical deposition

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