Sunlight-driven synthesis of anisotropic silver nanoparticles

Tang, Bin; Sun, Lu; Li, Jingliang; Zhang, Mingwen; Wang, Xungai

doi:10.1016/j.cej.2014.08.044

Cited by 60 publications

(24 citation statements)

References 56 publications

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“…At the lower concentration of citrate (⩽5.0 Â 10 À4 M), silver nanoprisms are converted into nanodecahedrons silver by increasing the concentration of citrate as shown in Figure 12. Although the intensity of light affects the shape of the NPs, the lighting power density did not influence the shape conversion except for reaction rate [100]. Silver Nanoparticles: Synthesis, Characterization and Applications http://dx.doi.org/10.5772/intechopen.75611…”

Section: Photochemical Synthesismentioning

confidence: 99%

Silver Nanoparticles: Synthesis, Characterization and Applications

Chouhan¹

2018

Silver Nanoparticles - Fabrication, Characterization and Applications

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Day by day augmenting importance of metal nanoparticles in the versatile fields like, catalyst, electronic, magnetic, mechanic, optical optoelectronic, materials for solar cell and fuel cell, medical, bioimaging, cosmetic, ultrafast data communication and optical data storage, etc, is increasing their value. Nanoparticles of alkali metals and noble metals (copper, silver, platinum, palladium, and gold, etc.) have a broad absorption band in the visible region of the electromagnetic spectrum of light, because the solutions of these metal nanoparticles show the intense color, which is absent in their bulk counterparts as well as their atomic level. The main cause behind this phenomenon is attributed to the collective oscillations of the free conductive electrons that are induced by an interaction with electromagnetic field. The whole incidence is known as localized surface plasmonic resonance. Out of these, we have selected the silver nanoparticles for the studies. In this article, we will discuss the synthesis, characterization, and application of the silver nanoparticles. Future prospective and challenges in the field commercialization of the nanosilver is also discussed.

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Section: Photochemical Synthesismentioning

confidence: 99%

Silver Nanoparticles: Synthesis, Characterization and Applications

Chouhan¹

2018

Silver Nanoparticles - Fabrication, Characterization and Applications

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“…Since the concentration of the capping agent is one of the factors controlling the shape conversion of AgNPs [8], a formation of different-shaped AgNPs was monitored in the reactions containing different DNA amounts (10-40 mg) under a blue LED irradiation for 24 h. As seen in Figure 2(A), the reaction containing 10 mg DNA could induce a formation of spherical AgNPs but not for a shape-conversion as indicated by the remained yellow colour and the characteristic SPR peak at 413 nm [30]. In contrast, the increased DNA amount to 20 mg was sufficient for inducing the formation of nonspherical AgNPs as determined by the changed colour to green and the characteristic SPR peaks at 412 and 595 nm, which corresponded to the in-plane dipole plasmon resonance of possibly formed hexagonal and triangle AgNPs [32].…”

Section: Syntheses Of Different-shaped Agnpsmentioning

confidence: 99%

“…The photo-induction process has received the increasing interest as a simple, effective approach to mediate a formation of different-shaped AgNPs [8]. Several light sources, including fluorescent light, UV light, light emitting diodes (LEDs), laser and sunlight, were reported to drive the photo-reduction of metal salts and induce the growth of metal seeds into anisotropic shapes [8][9][10][11][12][13]. The shape conversion direction of AgNPs was proposed to greatly depend on the excitation wavelength of a specific plasmon.…”

Section: Introductionmentioning

confidence: 99%

Light emitting diode irradiation induced shape conversion of DNA-capped silver nanoparticles and their antioxidant and antibacterial activities

Sritong

Chumsook

Siri

2018

Artificial Cells, Nanomedicine, and Biotechnology

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Due to size- and shape-dependent properties, a shape-controlled synthesis of silver nanoparticles (AgNPs) is one of the research challenging topics for their production and potential applications. This work reported the simple eco-friendly syntheses of different shaped AgNPs controlled by the plasmid DNA content and light emitting diodes (LEDs) irradiation. The synthesized AgNPs appeared as yellow, orange and green colloidal AgNPs, which transmission electron microscope (TEM) images revealed their different shapes; spherical AgNPs, a mixture of spherical and hexagonal AgNPs, and a mixture of spherical, hexagonal and corner-truncated triangle AgNPs, respectively. The average sizes of spherical, hexagonal and corner-truncated triangle AgNPs in the green colloidal solution were 12.32 ± 2.22, 23.03 ± 6.62 and 15.84 ± 4.31 nm, respectively. The analyses of X-ray diffraction, selected area electron diffraction and high-resolution TEM indicated the crystalline nature of the synthesized particles as the face-centred cubic silver. All synthesized AgNPs exhibited antioxidant activities similarly, whereas the yellow colloidal AgNPs exhibited the strongest antibacterial activity against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus as compared with the green and orange colloidal AgNPs.

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“…Thus far, several technologies including seeded growth and template methods have been developed to controllably synthesize metal particles with special morphology [18][19][20]. Among them, seeded growth involving preferential growth on preformed seed surface is probably the most widely used and effective protocol because of its advantages in structural control and variety [21,22]. However, despite its importance, the development of seeded growth for metal particle has remained a considerable challenge to achieve micron metal particles with desired structure.…”

Section: Introductionmentioning

confidence: 98%