Quasi-hexagonal ordered arrays of FePt nanoparticles prepared by a micellar method
Quasi-hexagonal ordered arrays of FePt nanoparticles prepared by a micellar method
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DOI：
10.1088/0256-307x/24/12/063
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发表时间：
2007-12
影响因子：
3.5
通讯作者：
Qu Sheng;Zhang Xingwang;Yin Zhigang;You Jingbi;Chen Nuo-fu
中科院分区：
文献类型：
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作者：
Qu Sheng;Zhang Xingwang;Yin Zhigang;You Jingbi;Chen Nuo-fu
采用二嵌段共聚物PS-b-P2VP在甲苯中自组装、浸涂和等离子体处理的方法，在Si衬底上制备了六方有序的磁性FePt纳米颗粒阵列。经过处理的FePt纳米颗粒被氧化层覆盖，氧化层可以通过40s Ar+溅射去除。通过x射线光电子能谱测量揭示了加盐顺序对组分分布的影响。目前制备的有序排列的FePt纳米粒子在600℃退火后没有出现颗粒团聚现象，这表明用胶束法制备FePt纳米粒子具有优势。此外，用振动样品磁强计研究了退火后的FePt纳米颗粒在室温下的磁性能。
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 degrees C 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.