Size Distribution of Silver Nanoparticles: UV-Visible Spectroscopic Assessment

Desai, Rucha; Mankad, Venu; Gupta, Sanjeev K.; Jha, Prafulla K.

doi:10.1166/nnl.2012.1278

Cited by 232 publications

(127 citation statements)

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“…2 shows two UV-vis spectra of Ag-MWNT and Ag@Pt-MWNT prepared with the 0.7 mM Pt salt precursor. The initial Ag sample clearly exhibits a SPR peak at 408 nm as reported previously [2,28], while the peak intensity of the Ag@Pt-MWNT is almost suppressed. This change can be easily observed through the color change of the solutions from yellowish (Ag-MWNT) to black (Ag@Pt-MWNT) during the GRR process, indicating the formation of a Pt layer on the Ag surface.…”

Section: Materials Characterizations Of Ag@pt-mwntsupporting

confidence: 82%

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

Rashid

Jun

Jung

et al. 2015

Sensors and Actuators B: Chemical

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Section: Materials Characterizations Of Ag@pt-mwntsupporting

confidence: 82%

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

Rashid

Jun

Jung

et al. 2015

Sensors and Actuators B: Chemical

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“…Some studies suggests that smaller particles range 5-10 nm absorb UV/Vis light near 420 nm [37] . Desai et al [38] and He et al [39] suggested that smaller nanoparticles possess less single surface plasmon resonance that results in blue shift. So, λ max at 423 nm suggests that the synthesized AgNPs have smaller size i.e.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis and Characterization of Silver Nanoparticles from Crocus Mathewii; A Disremembered Turkish Flowering Plant

Yildiztekin¹,

Nadeem²,

Yildiztekin³

et al. 2017

pharmaceutical-sciences

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Mahmut, et al.: Characterization of Silver Nanoparticles from Crocus mathewiiThis study reports the first ever chemical study on Crocus mathewii, a Turkish endemic and forgotten flowering plant. Silver nanoparticles were green synthesized from one mmol×l -1 silver nitrate extract of C. mathewii. The water-suspended silver nanoparticles showed a peak at 423 nm in UV/Vis spectrophotometer that suggested smaller particle size due to its less surface plasmon resonance. Transmission electron microscopy analysis also proved excellent polydispersity of quasi-spherical particle size distribution with average particles of 7.5 nm (2.5-25 nm). The presence of silver in the nanoparticles was analyzed by X-ray diffraction, while Fourier transform infrared spectroscopy analysis showed the presence of various -OH and -NH containing organics. The results proved that the crude extract of C. mathewii can be used for green synthesis of silver nanoparticles in future for medicinal uses.

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“…1), indicating the formation of Ag-NPs due to reduction of silver ions by active molecules present in the extract. This color is attributed to surface plasmon resonance, which is a size-dependent property of NPs (Nair et al 2014;Desai et al 2012). Figure 2a shows the reactions at 50, 70 and 90°C.…”

Section: Visual Observationmentioning

confidence: 99%

Green synthesis and characterization of silver nanoparticles using Cydonia oblong seed extract

et al. 2016

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The green synthesis of nanoparticles has emerged as a cost-effective and environmentally benign technique. The present study describes the synthesis of silver nanoparticles (Ag-NPs) using a seed extract of Cydonia oblonga. The conditions were optimized by adjusting pH, temperature, time and amount of seed extract. The nanoparticles produced were characterized by different techniques, namely UV-visible spectroscopy, Fourier transmission infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy. The formation of Ag-NPs was confirmed by UV-visible spectroscopic analysis. FTIR analysis was performed to identify the biomolecules, which played a key role in the reduction of Ag ? ions. XRD confirmed that the silver nanoparticles possessed face-centered cubic structure. The green chemistry approach has proven that Ag-NPs can be synthesized by using plant extract in which biomolecules effectively act as capping and reducing agent.

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Size Distribution of Silver Nanoparticles: UV-Visible Spectroscopic Assessment

Cited by 232 publications

References 0 publications

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

Green Synthesis and Characterization of Silver Nanoparticles from Crocus Mathewii; A Disremembered Turkish Flowering Plant

Green synthesis and characterization of silver nanoparticles using Cydonia oblong seed extract

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