Determination of Oxygen and Nitrogen in Ag Nanoparticles: Role of Surfactants

Kamal, S.S. Kalyan; Sahoo, Prasanta Kumar; Vimala, J.; Durai, L.

doi:10.1166/asl.2010.1123

Cited by 4 publications

(2 citation statements)

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“…Surfactant coating on Ag-NPs was extensively removed according to the procedure reported elsewhere [4,8]. To prepare a thin film for conductivity measurement, a suspension of Ag-NPs in toluene (20% by weight) was spin coated on a glass substrate at a speed of 1000 rpm.…”

Section: Methodsmentioning

confidence: 99%

“…Commercial silver pastes and inks generally provide thin film conductivity up to 2000 S cm À1 , even with annealing temperatures as high as 4200 C [2]. Since the melting points of metal particles drops drastically in the nanometer regime (520 nm), it would thus be possible to significantly lower the annealing temperature of Ag-NPs by reducing their particle size [3,4]. However, the preparation of stabilised Ag-NPs in the sub-10 nm range necessary to enable low-temperature coalescences to conductive elements remains a synthetic challenge.…”

Section: Introductionmentioning

confidence: 99%

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Facile chemical synthesis of nano-silver powders for printable electronics applications

Sahoo

Kamal

Shankar

et al. 2012

Journal of Experimental Nanoscience

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In this article, a simple and reproducible technique for the synthesis of silver nanoparticles in organic phase without using external reducing agents is reported. The organic phase contains silver acetate as precursor, oleic acid and oleyl amine as capping molecules and diphenyl ether as solvent. Monodispersed silver nanoparticles with an average size of 5 nm could be easily synthesised at large scale and it was possible to isolate the particles suitable for electronics applications. The formation of silver nanoparticles has been characterised in terms of optical absorption, transmission electron microscopy images and smallangle X-ray scattering. Recovered silver nanoparticles reveal X-ray diffraction of a well grown-up fcc-Ag lattice. Chemical and thermal characterisations of silver nanopowders were carried out using X-ray photoelectron spectroscopy and thermogravimetric analysis, respectively. For the latter purpose, concentrated dispersions of silver nanoparticles were prepared and used for depositing uniform thin layers. Thin films were sintered at low temperature to obtain conductive films and the films were characterised using scanning electron microscope. Electrical conductivity of the conductive films was in the range 2-3 Â 10 4 S cm À1 .

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Section: Methodsmentioning

confidence: 99%