Dendritic Ag–Fe nanocrystalline alloy synthesized by pulsed electrodeposition and its characterization

Santhi, K.; Revathy, T.A.; Narayanan, Vijaykrishnan; Stephen, A.

doi:10.1016/j.apsusc.2014.08.039

Cited by 16 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to now, there have been some reports about the preparation of the dendritic fractals of metal, alloy or their oxide and sulfide, etc. [9][10][11][12][13][14][15][16][17][18]. Most of them were synthesized by the controlled growth of the different crystal planes through the diffusion-limited aggregation (DLA) process in the hydrothermal condition.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, magnetic and microwave electromagnetic properties of dendritic iron

Yan

Zhao

et al. 2015

Appl. Phys. A

View full text Add to dashboard Cite

Iron dendritic micropines are synthesized by a hydrogen reduction, where the hematite dendritic micropines prepared by a hydrothermal method are used as starting materials. The as-obtained dendritic iron exhibits enhanced coercivity and remanent magnetization at room temperature and high complex permittivity at 2-18 GHz due to the peculiar shape anisotropy and good crystallinity. The negative imaginary permeability is observed at 14.5-18.0 GHz, suggesting it has a potential as a lefthanded material. The paraffin-based composites containing 30 wt% dendritic irons show large permittivity resulting from the charge polarization and the conductivity and have a minimal reflection loss (RL) of -37.4 dB at 7.4 GHz when the thickness (d) is 2.0 mm. The RL values less than -20 dB are obtained in the frequency range of 5.5-12.9 GHz when d increases from 0.9 to 3.0 mm.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, magnetic and microwave electromagnetic properties of dendritic iron

Yan

Zhao

et al. 2015

Appl. Phys. A

View full text Add to dashboard Cite

show abstract

“…The phase diagram of Fe–Ag binary alloys exhibits complete immiscibility even in the liquid phase at ∼1800 K, indicating a strong repulsive interaction between the two metals . This binary system has been synthesized by various methods, such as laser processing, − evaporation, − sputtering, − ion-beam deposition, − mechanical alloying, − electroless deposition, − and electrodeposition. − The latter technique however is especially suitable for tailoring the micro/nanostructure down to few nanometers, mainly due to the low energy and limited mean free path of metal ions in comparison with the physical methods. Electrodeposition of such films indeed results in separated nanophases, with the magnetic precipitates yielding giant magnetoresistance. ,,− Recently, Ag–Fe alloys have also been used as antimicrobial surfaces for biodegradable stents or antibacterial activity. , …”

Section: Introductionmentioning

confidence: 99%

“…In 2014, Santhi et al used thiourea to complex 0.01 M Ag + , seeking to narrow the redox potential difference in an electrolyte containing Fe 3+ . Using pulse electrodeposition and stainless steel substrates they achieved two-phase (Fe-bcc and Ag-fcc) dendritic deposits at a current density >30 mA/cm 2 , with Fe content ranging from 12.6 to 94.2% at …”

Section: Introductionmentioning

confidence: 99%

Rational Compositional Control of Electrodeposited Ag–Fe films

Sun

Zangari

2020

Inorg. Chem.

View full text Add to dashboard Cite

Some alloys are very difficult to electrodeposit, due to problems such as the large difference in the equilibrium potentials and/or deposition kinetics of the alloy components, as well as the bath instability due to the spontaneous reactions in the bulk electrolyte. The Ag–Fe system is one of those. In this work, a novel alkaline citrate–dimethylhydantoin (DMH) complex has been used to synthesize thermodynamically immiscible Ag–Fe alloy films. The large difference in standard potentials and deposition kinetics of Ag and Fe is partially resolved by complexing Ag(I) with DMH, while the instability caused from spontaneous reduction of Ag(I) by Fe(II) was partially resolved by adding 1% Fe3+, based on the philosophy of the mixed potential theory. Furthermore, a paradigm for control of film composition is developed, based on the mass-transfer coefficient ratio, tested with various bath constitutions. Uniform and high-quality films are obtained, with a composition error of <4 at. % comparing with the predicted values. Electrochemical reactions involved in the deposition baths were systematically investigated using cyclic voltammetry, showing satisfactory agreement with the predicted deposition potentials calculated by equilibrium thermodynamics. The films deposited at high overpotential are proven to be biphasic, containing Ag-fcc and Fe-bcc phases, with a trend of decreasing crystallinity at increasing overpotentials when deposited at constant deposition time. A narrow transition potential range (<0.05 V) from the onset of Fe deposition to its limiting current condition was observed.

show abstract

“…Stephen et al. reported dendritic alloys fabricated from palladium and silver based precursors as highly efficient catalyst towards nitrophenol reduction . The alloys are also used for various applications such as hydrogen evolution reaction (HER), fuel cells, catalysts, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dendritic Cu–In Alloy on Cr(VI) Reduction Synthesized via Pulsed Electrodeposition

et al. 2018

View full text Add to dashboard Cite

Blending of two or more elements to form an alloy, offers way for the innovation of new materials with desirable characteristics which are indeed essential in this digital era of science. In this context, a noticeable copper‐indium (Cu−In) alloy is synthesized via pulsed electrodeposition (PED) and the catalytic performance of the alloy is evaluated by its conversion efficiency of chromium(VI) to less‐toxic chromium(III). From the XRD studies, as‐deposited Cu−In alloys show the presence of dual phases. The electron microgram reveals the dendritic formation. XPS and EDX analyses confirm the presence of copper and indium in the sample and elemental composition which is ascertained from atomic absorption spectroscopy (AAS). Heat treatment of the alloy upto 350 °C reveals the phase transformation to cubic Cu9In4 phase at 320 °C. Heavy metals are of great threat to health and should be removed from the waste water thereby prohibiting them from mixing in lakes and sea. From Cr(VI) reduction studies using Cu−In alloys prepared from various bath composition, the sample Cu−In synthesized from Cu60:In40 bath composition shows higher catalytic activity with a rate constant of 3.5 ms−1.

show abstract

Dendritic Ag–Fe nanocrystalline alloy synthesized by pulsed electrodeposition and its characterization

Cited by 16 publications

References 23 publications

Synthesis, magnetic and microwave electromagnetic properties of dendritic iron

Synthesis, magnetic and microwave electromagnetic properties of dendritic iron

Rational Compositional Control of Electrodeposited Ag–Fe films

Effect of Dendritic Cu–In Alloy on Cr(VI) Reduction Synthesized via Pulsed Electrodeposition

Contact Info

Product

Resources

About