Direct patterning of silver particles on porous silicon by inkjet printing of a silver salt via in-situ reduction (original) (raw)
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Currently, silver nanoparticles have attracted large interest in the photonics, electrics, analytical, and antimicrobial/biocidal fields due to their excellent optical, electrical, biological, and antibacterial properties. The versatility in generating different sizes, shapes, and surface morphologies results in a wide range of applications of silver nanoparticles in various industrial and health-related areas. In industrial applications, silver nanoparticles are used to produce conductive inks, which allows the construction of electronic devices on low-cost and flexible substrates by using various printing techniques. In order to achieve successful printed patterns, the necessary formulation and synthesis need to be engineered to fulfil the printing technique requirements. Additional sintering processes are typically further required to remove the added polymers, which are used to produce the desired adherence, viscosity, and reliable performance. This contribution presents a revie...
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The detailed characterisation of nanoparticles is a crucial point in their further application. Without knowledge about their sizes, composition and lengths of ligands nanoparticles could not be used effectively. For example without information about diameters engineers are not able to design jet which with high efficiency would spread nanoparticles on substrate during printing. Without knowledge about composition and length of the ligands it would be difficult to predict what temperature to use during sintering. To learn more about nanoparticles which we are using (commercially available ligand stabilised silver nanoparticles) we have decided to perform series of experiments in order to better understand their properties. We have concentrated here on analysis of AgNPs morphology using HRTEM, AFM, DLS and UV-Vis. Chemical composition was checked using XPS and EDX, and finally electronic structure was investigated using UPS and STS. The size distribution measured using all four techn...
Synthesis of Ag nanoparticles using an electrolysis method and application to inkjet printing
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011
This paper reports a new mass-production method for synthesizing Ag nano-particles using electrolysis. In this method, Ag ions were directly and continuously extracted from 99 wt% Ag metal electrodes and a reduction agent reduced them to Ag nano-particles. By changing the applied voltage and electrolyte temperature, the average size of the synthesized Ag particles was shown to vary in the range of 10-80 nm. These particles were tested for the possibility of micropatterning of the electrode on a polyimide substrate. As a result, patterns as fine as 50-100 m with a relatively low resistivity of 6.5 cm were successfully obtained.
Various metallic nano-sized patterns fabricated using an Ag ink printing technique
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Materials Chemistry and Physics, 2008
Highly monodispersed silver nanoparticles were successfully synthesized by thermolysis of silver alkanoate precursors and were characterized by X-ray diffraction, TGA/DTA and transmission electron microscopy. The results showed that these nanoparticles exhibit spherical shape with FCC crystal structure. The relationship between the carbon chain length and the monodispersity of the nanoparticles was investigated. Furthermore, the size of the particles was controlled by varying the concentration of the stabilizing surfactants. The silver nanoparticles were easily re-dispersed into n-tetradecane and printed onto various substrates using a Microfab head with a single nozzle. The ink-jet printed patterns were sintered at 250 • C and their electrical resistivity was about 6 cm.