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題 名 | 碳酸鍶奈米線的製備及其成長機制的探討=Synthesis and Formation Mechanism of SrCO₃ Nanowires |
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作 者 | 林祉成; 郭家良; 周世凡; 蔣瑞光; | 書刊名 | 遠東學報 |
卷 期 | 29:4 2012.12[民101.12] |
頁 次 | 頁485-494 |
分類號 | 440.34 |
關鍵詞 | 碳酸鍶; 熱裂解; 奈米線; Strontium carbonate; Thermal decomposition method; Nanowire; |
語 文 | 中文(Chinese) |
中文摘要 | 在溶劑油胺及適量的油酸中熱裂解合成的前驅物油酸鍶(油酸/油酸鍶莫耳比0.5~1)可得到不同長度、均一寬度且穩定的正交晶系(空間群為Pnma)碳酸鍶奈米線(70~300 nm × 5 nm),反應系統中若沒添加油酸則得到結晶度較差的約5 nm的碳酸鍶奈米粒子及由粒子定向排列聚集熔合而成短的奈米線,但過量的油酸(油酸/油酸鍶莫耳比大於2.5)會抑制碳酸鍶晶體的析出。反應過程顯示系統中適量共存的油酸及油胺的可能形成軟板模而助於奈米線的形成及穩定。電子繞射顯示奈米線為似單晶的圖譜,長度方向為a軸,顯示出奈米線的定向成長。其製程可以簡化以免除純化前驅物所需的有機溶劑的使用。碳酸鍶奈米線表面有界面活性劑保護,可作為高分子的填充劑,做成奈米複合材料。 |
英文摘要 | Uniform orthorhombic(space group Pnma) SrCO3 nanowires with size of about 70~300 nm × ~5 nm were synthesized via the thermal decomposition of synthetic precursor strontium oleates (Sr-oleate) in oleylamine with the presence of appropriate amount of oleic acids (oleic acid/Sr-oleate molar ratio 0.5~1). Without the presence of free oleic acid in the synthesis process only give ~ 5nm nanoparticles and short nanowires composed of oriented attachment/fusion nanoparticles of SrCO3 with poor crystallinity as products. Excess oleic acid (oleic acid/Sr-oleate molar ratio larger than 2.5) inhibit the present of SrCO3 crystals. The process suggested that the coexistence of oleic acid and oleylamine might form soft templates for the formation and protection of nanowires. The electron diffraction of the nanowires show single-crystal-like diffraction pattern with a axis orientation at the length direction, indicate their order anisotropic growth. The synthesis process might be simplified to avoid the usage of organic solvents in the purification process of the precursor. All the SrCO3 nanowires are protected by the surfactants on the surfaces and should be applied as fillers for polymers in the nanocomposites. |
本系統中英文摘要資訊取自各篇刊載內容。