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http://dx.doi.org/10.6117/kmeps.2011.18.4.027

Effect of PVP Molecular Weight on Size of Sn Nanoparticles Synthesized by Chemical Reduction  

Jang, Nam-Ie (Department of Materials Science & Engineering, Seoul National University of Science & Technology)
Lee, Jong-Hyun (Department of Materials Science & Engineering, Seoul National University of Science & Technology)
Publication Information
Journal of the Microelectronics and Packaging Society / v.18, no.4, 2011 , pp. 27-32 More about this Journal
Abstract
Tin nanoparticles were synthesized at room temperature by a compulsive reduction reaction using tin(II) acetate and tin(II) chloride precursors. When an identical amount (0.015 g) of polyvinyl pyrrolidone (PVP) was added, it was concluded that the probability of abnormally big particles forming increased with an increase in PVP molecular weight, resulting in the wide distribution of Sn nanoparticles. Differential scanning calorimetry measurements were carried out using diethylene glycol solution containing synthesized tin nanoparticles. When the population of specific particles with sizes below 35 nm was adequate, the melting point depression peaks of tin nanoparticles corresponding to the specific size were observed besides an evaporation endothermic peak of DEG during the first heating. Because DEG was evaporated and tin nanoparticles in contact became molten and coarsened during the first heating, a melting peak of bulk tin was only observed at $232^{\circ}C$ during the second heating.
Keywords
reduction synthesis; precursor; PVP; molecular weight; particle size;
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