| Quasi-Hexagonal Ordered Arrays of FePt Nanoparticles Prepared by a Micellar Method |
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| 作者姓名： | 屈盛 张兴旺 尹志岗 游经碧 陈诺夫 |
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| 作者单位： | Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| 基金项目： | Supported by Hundred Talents Programme Chinese Academy of Sciences, National High-tech R＆D Programme of China under Grant No 2006AA03Z306, and the National Natural Science Foundation of China under Grant No 50601025. |
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| 摘 要： | Hexagonally ordered arrays of magnetic FePt nanoparticles on Si substrates are prepared by a self assembly of diblock copolymer PS-b-P2VP in toluene, a dip coating process and finally plasma treatment. The as-treated FePt nanoparticles are covered by an oxide layer that can be removed by a 40 s Ar＋ sputtering. The effects of the sequence of adding salts on the composition distribution are revealed by x-ray photoelectron spectroscopy measurements. No particle agglomeration is observed after 600℃annealing for the present ordered array of FePt nanoparticles, which exhibits advantages in patterning FePt nanoparticles by a micellar method. Moreover, magnetic properties of the annealed FePt nanoparticles at room temperature are investigated by a vibrating sample magnetometer.
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| 关 键 词： | 纳米粒子 共聚物 涂层处理 等离子体 |
| 收稿时间： | 2007-08-26 |
Quasi-Hexagonal Ordered Arrays of FePt Nanoparticles Prepared by a Micellar Method |
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| QU Sheng,ZHANG Xing-Wang,YIN Zhi-Gang,YOU Jing-Bi,CHEN Nuo-Fu.Quasi-Hexagonal Ordered Arrays of FePt Nanoparticles Prepared by a Micellar Method[J].Chinese Physics Letters,2007,24(12):3520-3523. |
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| Authors: | QU Sheng ZHANG Xing-Wang YIN Zhi-Gang YOU Jing-Bi CHEN Nuo-Fu |
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| Institution: | Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| Abstract: | Hexagonally ordered arrays of magnetic FePt nanoparticles on Si substrates are prepared by a self assembly of diblock copolymer PS-b-P2VP in toluene, a dip coating process and finally plasma treatment. The as-treated FePt nanoparticles are covered by an oxide layer that can be removed by a 40Ar+ sputtering. The effects of the sequence of adding salts on the composition distribution are revealed by x-ray photoelectron spectroscopy measurements. No particle agglomeration is observed after 600°C annealing for the presentordered array of FePt nanoparticles, which exhibits advantages in patterning FePt nanoparticles by a micellar method. Moreover, magnetic properties of the annealed FePt nanoparticles at room temperature are investigated by a vibrating sample magnetometer. |
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| Keywords: | 75 50 Bb 81 05 Bx 81 07 -b |
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