Spherical granular structures of Ag/Co nanoparticles: Synthesis, characterization and magnetic properties

Saravanan, P.; Rao, K. Srinivasa; Manda, Premkumar; Singh, Amitabh

doi:10.1016/j.jallcom.2010.12.141

Cited by 13 publications

(10 citation statements)

References 27 publications

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“…Other investigators have shown that nanoparticles of silver are themselves stabilized by the presence of cobalt. It has been noted that oxidation favors CoO over Ag 2 O, so that bimetallic nanoparticles with cobalt and silver in proximity would be expected to have reduced silver degradation, thus permitting more environmentally stable silver plasmonic behavior ( Saravanan et al, 2011 ; Sachan et al, 2012) . Note that cobalt was used to backfill the insect neurons in this study.…”

Section: Discussionmentioning

confidence: 99%

Plasmon resonance and the imaging of metal-impregnated neurons with the laser scanning confocal microscope

Thompson

Harley

Barthel

et al. 2015

eLife

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The staining of neurons with silver began in the 1800s, but until now the great resolving power of the laser scanning confocal microscope has not been utilized to capture the in-focus and three-dimensional cytoarchitecture of metal-impregnated cells. Here, we demonstrate how spectral confocal microscopy, typically reserved for fluorescent imaging, can be used to visualize metal-labeled tissues. This imaging does not involve the reflectance of metal particles, but rather the excitation of silver (or gold) nanoparticles and their putative surface plasmon resonance. To induce such resonance, silver or gold particles were excited with visible-wavelength laser lines (561 or 640 nm), and the maximal emission signal was collected at a shorter wavelength (i.e., higher energy state). Because the surface plasmon resonances of noble metal nanoparticles offer a superior optical signal and do not photobleach, our novel protocol holds enormous promise of a rebirth and further development of silver- and gold-based cell labeling protocols.DOI: http://dx.doi.org/10.7554/eLife.09388.001

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Section: Discussionmentioning

confidence: 99%

Plasmon resonance and the imaging of metal-impregnated neurons with the laser scanning confocal microscope

Thompson

Harley

Barthel

et al. 2015

eLife

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“…Great interest in the physical properties of film systems based on Co and Ag stimulated considerable amount of research phase state as bilayer films and multilayers [2,[3][4][5][6][7][8][9][10][11]. In one of the first work [3], which were performed diffraction studies phase of multilayers Co/Ag prepared by molecular beam epitaxy, it was concluded that the formation of granules Co in the Ag matrix.…”

Section: Structural and Phase Statementioning

confidence: 99%

“…The authors of [9] based on XRD studies concluded that the formation of films based on Co and Ag oversaturated (this interpretation in terms of bulk samples) s.s. Ag (Co) with fcc lattice решіткою (а  0,4073-0,4083 nm). Note that the authors [9] as [3][4][5][6]11], the observed X-ray lines separately from fcc s.s. Ag(Co) (although it focuses on this attention, and designate them as lines Ag) and hexagonal Co (obviously this is a reflection of granules Co). Summary of diffraction studies [10] indicate that the lattice parameter s.s. Ag (Co) very little different from the lattice parameter Ag films in a wide range of concentrations Co atoms ( Fig.…”

Section: Structural and Phase Statementioning

confidence: 99%

Physical Properties of Film Alloys Based on Ferromagnetic and Noble Metals (review). ІІ. Film Materials Based on Co and Ag or Au

Cheshko¹,

Odnodvorets²,

Protsenko³

et al. 2016

J. Nano- Electron. Phys.

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The results of analysis of literature and own results on the phase composition, electrophysical and magnetoresistive properties of film based granular alloys Co and Ag or Au. As between film systems based on Fe and Ag or Au and Co and Ag or Au much in common, then this work can be seen as a continuation of [1], although we observed significant withdrawal of these two groups of film materials in structural-phase state, causing some change in electrophysical and magnetoresistive properties. The increase of the value of temperature coefficient resistance film Ag (Co) at the сСо ≥ 26 at.% and the strain coefficient at the сСо  70 at.%. It is concluded that the value of GMR completely determined by the temperature measurement and perfection of granulate state. Кeywords: Films Ag(Co) and Au(Co), Structural and phase state, Electrophysical and magnetoresistive properties, Temperature coefficient of resistance, Strain coefficient.

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“…The nanoparticles are commonly visualized by transmission electron microscopy (TEM). With recent advances in synchrotron radiation sources, small angle X-ray scattering (SAXS) has emerged as a powerful technique to complement TEM in the morphological investigations of magnetic nanoparticles [2][3][4][5][6]. The intensity of X-ray scattered from the nanoparticles is plotted as a function of the scattering vector (q) which is defined by:…”

Section: Introductionmentioning

confidence: 99%

Investigation of Surfactant Effect on Size Distribution of FePt-based Nanoparticles by Synchrotron SAXS and TEM

Chokprasombat

Koyvanich

Sirisathitkul

et al. 2015

Trans Indian Inst Met

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Nanoparticles of 1-3 nm in radius were obtained from the reaction between Fe(acac) 3 and Pt(acac) 2 in the modified polyol process using two different solvents. The increase in surfactants (oleic acid and oleylamine) reduces the Fe:Pt ratio and increases the size of nanoparticles synthesized in dioctyl ether. In case of synthesis of benzyl ether, 2.5 mmol of each surfactants gave rise to uniform nanoparticles with hexagonal self-assembled pattern on a substrate whereas 5.0 mmol did not. Synchrotron small angle X-ray scattering profiles were fitted assuming a sphere form factor with a log-normal size distribution, using the least-squared minimization procedure. The average particle radii showed an increase with increasing surfactants from 2.5 to 5.0 mmol. The fitted log-normal size distributions also confirmed the effect of surfactant.

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Spherical granular structures of Ag/Co nanoparticles: Synthesis, characterization and magnetic properties

Cited by 13 publications

References 27 publications

Plasmon resonance and the imaging of metal-impregnated neurons with the laser scanning confocal microscope

Plasmon resonance and the imaging of metal-impregnated neurons with the laser scanning confocal microscope

Physical Properties of Film Alloys Based on Ferromagnetic and Noble Metals (review). ІІ. Film Materials Based on Co and Ag or Au

Investigation of Surfactant Effect on Size Distribution of FePt-based Nanoparticles by Synchrotron SAXS and TEM

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