Ruthenium Nanoparticles:  Size, Shape, and Self-Assemblies

Viau, Guillaume; Brayner, Roberta; Poul, Laurence; Chakroune, Nassira; Lacaze, E.; Fiévet-Vincent, Françoise; Fiévet, Fernand

doi:10.1021/cm0212109

Cited by 232 publications

(161 citation statements)

References 59 publications

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“…Since most of the physical and chemical methods permit prediction of NPs size, they are used as precocious matter in towering technology. Furthermore, they can be used as sample matter for necessary tests that require nonaggregate, homogeneous particles with an expected size and confined size distribution [74]. Additionally, NPs because of their size, display differences in physical and chemical features, which in turn determine changes in optical features which can induce changes in color.…”

Section: Measuring Npsmentioning

confidence: 99%

Fungal synthesis of size-defined nanoparticles

Zielonka

Klimek‐Ochab

2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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[7] and silica oxide [8] NPs, which can be produced by mycofabrication-(NPs synthesis systems using fungi). Apart from fungi, there is a variety of microorganisms producing NPs, such as many bacteria, biofilms [9], actinomycetes [10] and extremophiles [11]. Apart from bacteria, fungi are a favorable option for NPs synthesis. Fungi are filamentous by nature and able to withstand the pressure of flow and mixing in the bioreactor trough. In addition, they can accumulate metals by biological and physicochemical means. Fungi are an excellent choice for large-scale production as biocatalysts because of their ability to secrete extracellular enzymes [7]. By contrast, the bacterial fermentation process involves numerous additional steps to obtain a clear filtrate of colloidal broth [12].In this review we discuss strategies for NP synthesis with emphasis on the bottom-up myco-approach and its application and flexibility for use in many industrial fields. Our focus is on aspects related to the size of NPs and methods of measuring this feature. It has been discovered that fungi can efficiently synthesize clusters of atoms of a determined size. We also reviewed NPs produced by Fusarium oxysporum (F. oxysporum), which remains the invincible leader in this field. NPs synthesis strategiesToday, NPs are produced by numerous chemical and physical methods, although more environmentally friendly methods are available. Bottom-up and top-down are two strategies for the synthesis of metal NPs as shown in figure 1. The bottom-up strategy relates to the formation of structures atom by atom, molecule by molecule or by self-organization [13]. Top-down strategy includes the reduction of material to dimensions of AbstractFungi with metabolic capacities can efficiently synthesize a wide range of nanoparticles (NPs). This biotransformation process and its product have extensive applications especially for industry, agriculture and medicine, where NPs size and shape is essential and can be defined by specific analytical methods. Fungi cultivation and further bioconversion can be fully controlled to obtain the desired nanoparticles. Additionally, this review provides information about the fungus F. oxysporum, which is able to synthesize the largest amount of different types of NPs.

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Section: Measuring Npsmentioning

confidence: 99%

Fungal synthesis of size-defined nanoparticles

Zielonka

Klimek‐Ochab

2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…The resulting metal NPs can be filtered and dried in air. The polyol method has been used in the presence of various stabilisers such as dodecane-thiol as a capping agent [38], or supports such as polyvinylpyrrolidone (PVP) [39][40][41][42] and -alumina [26].…”

Section: Synthesis and Characterisation Of Ru-nps In Ionic Liquidsmentioning

confidence: 99%

Ruthenium Nanoparticles in Ionic Liquids – A Saga

Campbell

Prechtl²,

Santini³

et al. 2013

COC

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Ionic liquids (ILs) are excellent media for the generation and stabilisation of metallic nanoparticles (NPs). Their ionic character coupled with 3-D structural pre-organisation in the liquid state, serves to direct the growth of transition metal NPs generated in situ, and to subsequently protect and stabilise them. Until now, many different NPs have been successfully synthesised within these media, however much attention has been paid to Ru-NPs. These have been prepared with small sizes and narrow size distributions by reduction of organometallic compounds with molecular hydrogen as well as decomposition of transition-metal complexes in the zero-valent state. These stable Ru-NPs immobilised in the ILs have proven to be efficient green catalysts for several reactions in multiphase conditions, including important energy-related processes such as biomass refinement. Furthermore, they present potential novel materials for use in the production of smarter electronic devices. In this review, the synthesis, stabilisation and size-control of Ru-NPs via various methods in different ILs is discussed, followed by their varied application in catalysis and potential in new fields.

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“…It has been reported that cadmium substituted Cu ferrites behaves as n-type semiconductors and the seebeck coefficient gradually decreases with increase in cadmium content [12,13]. The physical and chemical properties of these materials can be tuned by controlling the particle size, shape and the inter particle interactions [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Study of structural and ferromagnetic properties of pure and Cd doped copper ferrite

Rai

Verma

Sharma

et al. 2011

Journal of Physics and Chemistry of Solids

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International audienceThis report presents the synthesis of copper cadmium ferrite (CuCdFeO x=0.3, 0.4, 0.5, 0.6 and 0.7) by citrate precursor method and its subsequent characterization by using X-ray diffraction (XRD), differential scanning calorimetry, infrared spectroscopy and ferromagnetic resonance. XRD results confirm the single cubic spinel phase formation with the particle size of 40nm, which decreased up to 20nm with increase in Cd content, while the lattice parameter increased with increase in Cd content. A significant change in the magnetic properties was observed in CuFeO system with Cd doping. The line width and resonance field variation against change in temperature is noted and the data is fitted to the Linearlized model (LM and Smit and Beljers (SB model to find out the parameters. The results recorded from the SB approach are in good agreement to that observed in the magnetic measurements carried out by vibrating sample magnetometer (VSM) techniques

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Ruthenium Nanoparticles: Size, Shape, and Self-Assemblies

Cited by 232 publications

References 59 publications

Fungal synthesis of size-defined nanoparticles

Fungal synthesis of size-defined nanoparticles

Ruthenium Nanoparticles in Ionic Liquids – A Saga

Study of structural and ferromagnetic properties of pure and Cd doped copper ferrite

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