Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 66(11): 579-585 (2017)

特集Special Issues

23 “Rays”から“Ray”へ—イオンビームを用いた微細機能性材料開発—23 From “Rays” to “Ray”—Development of Functional Nanomaterials Using Ion Beams—

京都大学大学院工学研究科分子工学専攻Department of Molecular Engineering, Graduate School of Engineering, Kyoto University ◇ 615–8510 京都府京都市西京区京都大学桂 ◇ Nishikyo-ku, Kyoto 615–8510, Japan

発行日:2017年11月15日Published: November 15, 2017


Radiation chemical processes has established a presence in polymerica materials processing due to their advantageous fabrication capability with uniform chemical reactions induced, size-controllability, etc. Meanwhile, there is a long history of the concept and technology of controlling the shape of polymer materials in nanometer scales. Pioneering works were reported in the middle of the 20th century, where the change of physical properties induced by radiation-induced chemical reactions was studied based on the molecular size and shape of polymers.

“Long chains” in polymers that can variously change their conformations dominantly determine the characteristics and advantages of polymer materials such as mechanical property, thermal stability, solubility and processability, and so on. Therefore, their statistical and quantitative analyses of polymer chains have been demonstrated. Since the radius of gyration for a polymer chain is in the range of several nanometers, it has been a more suitable target than a small molecule to characterize its conformation and size. Due to such nanometer-scale sizes, controlling the morphology and functions is directly linked to the development of functional nanomaterials. On the other hand, it is easy to imagine the difficulty in fabricating polymers into nanomaterials with a size of several to tens of nanometers. In this article, a part of our studies on the novel nano-fabrication techniques is introduced, utilizing polymerization, degradation, and cross-linking reactions induced by irradiations.

Key words: cross-linking; charged particle; nanogel; nanowire; polymerization; single particle nanofabrication technique (SPNT); single particle-triggered linear polymerization (STLiP)

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