Extracellular Biosynthesis of Copper and Copper Oxide Nanoparticles by <i>Stereum hirsutum</i>, a Native White‐Rot Fungus from Chilean Forests

Cuevas, Raphael; Durán, Nélson; Díez, M.C.; Tortella, Gonzalo; Rubilar, Olga

doi:10.1155/2015/789089

Cited by 191 publications

(88 citation statements)

References 43 publications

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“…In acidic pH, nanoparticles aggregated out of the nucleation, while at alkaline pH, great numbers of nuclei formed, instead of aggregation [29,30]. So pH 9 was found to be optimum to biosynthesize nanoparticles, which was in a match the values reported in the literature [19]. Different concentration of copper sulphate: Formation of copper oxide nanoparticles was studied by the variation of copper sulphate concentration from 10 to 50 mM.…”

Section: Different Parameters Were Optimized For the Biosynthesis Of supporting

confidence: 57%

“…Another researcher have reported that the synthesis of CuONPs can be monitored by the formation of SPR at 415 nm [18]. Various reports have established that the SPR band of copper nanoparticles were observed between 620 to 710 nm [19]. These variations in the SPR may be attributed to spherical shape of copper oxide nanoparticles, the surface plasmon resonance and the blue shift are affected by the size distribution [20].…”

Section: Resultsmentioning

confidence: 99%

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Optimization Properties and Characterization of Green Synthesis of Copper Oxide Nanoparticles Using Aqueous Extract of Cordia myxa L. Leaves

Thamer¹,

Muftin²,

Al-Rubae³

2018

Asian J. Chem.

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Copper oxide nanoparticles (CuONPs) were green synthesized using aqueous extract of Cordia myxa L. leaves as reducing and capping agent. The synthesized nanoparticles were characterized by UV-visible spectrophotometer, FTIR, X-ray diffraction, scanning electron microscope and atomic force microscope. The prepared copper oxide nanoparticles showed surface plasmon resonance centered at 400 nm. The optimized condition for the synthesis of copper nanoparticles revealed that the aqueous extract of Cordia myxa L. leaves:copper sulfate ratio was 1:3, pH was 9 and copper sulfate concentration was 40 mM. FTIR results showed that stabilization and formation of CuONPs were due to phenolic groups and amines in plant extract. The XRD pattern showed that the particles are monoclinic in nature. The crystalline morphology and size of the nanoparticles were determined by scanning electron microscope. Presence of elemental copper was revealed by EDX analysis. Size range was from 20 to 106.81 nm was determined by atomic force microscope.

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Section: Different Parameters Were Optimized For the Biosynthesis Of supporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Optimization Properties and Characterization of Green Synthesis of Copper Oxide Nanoparticles Using Aqueous Extract of Cordia myxa L. Leaves

Thamer¹,

Muftin²,

Al-Rubae³

2018

Asian J. Chem.

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“…Nanoparticles have been synthesized through several methods, such as the polyol, reverse micelles, electron beam irradiation, micro-emulsion and wire explosion techniques and in-situ chemical synthesis. Among all the procedures, a compound that has the ability to form a complex with metal ions, such as soluble polymers, is an important method for CuNPs synthesis, since it prevents the nanoparticles aggregation [7,8]. Previous work indicated that physical and chemical methods have been used to synthesize polymer nanocomposites, depending on the nanoparticle-polymer interactions [9].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Optical Characteristics of Chitosan(1−x):Cuox (4 ≤ x ≤ 12) Based Polymer Nano-Composites: Optical Dielectric Loss as an Alternative Method for Tauc’s Model

Aziz

2017

Nanomaterials

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In this work, copper (Cu) nanoparticles with observable surface plasmonic resonance (SPR) peaks were synthesized by an in-situ method. Chitosan host polymer was used as a reduction medium and a capping agent for the Cu nanoparticles. The surface morphology of the samples was investigated through the use of scanning electron micrograph (SEM) technique. Copper nanoparticles appeared as chains and white specks in the SEM images. The strong peaks due to the Cu element observed in the spectrum of energy dispersive analysis of X-rays. For the nanocomposite samples, obvious peaks due to the SPR phenomena were obtained in the Ultraviolet-visible (UV-vis) spectra. The effect of Cu nanoparticles on the host band gap was understood from absorption edges shifting of absorption edges to lower photon energy. The optical dielectric loss parameter obtained from the measurable quantities was used as an alternative method to study the band structure of the samples. Quantum mechanical models drawbacks, in the study of band gap, were explained based on the optical dielectric loss. A clear dispersion region was able to be observed in refractive indices spectra of the composite samples. A linear relationship with a regression value of 0.99 was achieved between the refractive index and volume fractions of CuI content. Cu nanoparticles with various sizes and homogenous dispersions were also determined from transmission electron microscope (TEM) images.

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“…and F. oxysporum strains have also been reported to biosynthesize CuO and Cu 2 S NPs. Another fungus known as Stereum hirsutum has been known for the formation of Cu and CuO NPs (Cuevas et al 2015). The synthesis of Cu or CuO NPs can lead to different surface plasmon resonances (SPR) which are formed due to the strong coupling between incident electromagnetic radiation and surface plasmon in metal NPs.…”

Section: Fungus-mediated Synthesismentioning

confidence: 99%

Metallic Nanoparticles, Toxicity Issues and Applications in Medicine

Singla

Guliani

Kumari

et al. 2016

Nanoscale Materials in Targeted Drug Delivery, Theragnosis and Tissue Regeneration

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The metallic nanoparticles (NPs) and their synthetic biology are an active area fascinating both the academics as well as scientific research applications in the field of nanotechnology. These nanostructures are a versatile class of materials such as metal NPs, metal oxide NPs, magnetic NPs and quantum dots for biomedical sciences and engineering due to their huge potential. A handful number of methods are adopted for the synthesis of one or the other kind of metal NPs which includes physical and chemical approaches. Each of the chemical and physical synthesis procedures deals with some limitations such as cost ineffectiveness, use of hazardous chemicals, formation of toxic end products and involvement of high-energy processes. To overcome these drawbacks, an alternative approach of environmentally benign and inexpensive biological synthesis mediated by plants or microbes has been essentially adopted. The variations in size, shape and surface chemistry of NPs affect the properties of metal NPs to a greater extent which in turn have an influence on their biological behaviour. Few metal NPs offer unique optical properties while others possess paramagnetic behaviour and quantum size effect which make them suitable in bio-imaging diagnostic techniques. Some metallic NPs play a role in tissue engineering and other therapeutic applications due to their ease of surface modifications, large surface area to volume ratio, unique electrical and anti-microbial activities. Instead of multi-disciplinary applications of metallic NPs, there is a great concern regarding the toxicity issues associated with the use of these NPs which need to be sorted out by looking out certain ways for favourable architecture involving the synthesis methods and parameters for designing the non-toxic NPs for improving the quality of life.

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Extracellular Biosynthesis of Copper and Copper Oxide Nanoparticles by Stereum hirsutum, a Native White‐Rot Fungus from Chilean Forests

Cited by 191 publications

References 43 publications

Optimization Properties and Characterization of Green Synthesis of Copper Oxide Nanoparticles Using Aqueous Extract of Cordia myxa L. Leaves

Optimization Properties and Characterization of Green Synthesis of Copper Oxide Nanoparticles Using Aqueous Extract of Cordia myxa L. Leaves

Morphological and Optical Characteristics of Chitosan(1−x):Cuox (4 ≤ x ≤ 12) Based Polymer Nano-Composites: Optical Dielectric Loss as an Alternative Method for Tauc’s Model

Metallic Nanoparticles, Toxicity Issues and Applications in Medicine

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