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Observation of Microstructural Changes in Polymer-Coated Kompeito-Type Platinum Particles by In Situ Heating TEM

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We have successfully prepared Kompeito-like platinum particles by hydrogen reduction of Pt4+ in the presence of sodium polyacrylate. We performed In Situ TEM observation of these platinum particles at high temperatures. At 300 °C, a thin carbon layer due to polyacrylate formed on the particle surface. The detailed structure of the particles did not change with temperatures up to 700 °C. Continuous heating up to 800 °C blunted the particles' edges and also sintering of the particles was observed. This result strongly indicates that the shape change and sintering of platinum particles are exclusively controlled by the carbon layer, which is generated from a surface stabilizer polymer.

Document Type: Research Article


Publication date: March 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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