Tunable magnetic properties of nanoparticle two-dimensional assemblies addressed by mixed self-assembled monolayers.
Tunable magnetic properties of nanoparticle two-dimensional assemblies addressed by mixed self-assembled monolayers.
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DOI：
10.1021/la105052z
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
B. Pichon;M. Pauly;P. Marie;C. Leuvrey;S. Bégin-Colin
中科院分区：
文献类型：
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作者：
B. Pichon;M. Pauly;P. Marie;C. Leuvrey;S. Bégin-Colin
磁性纳米颗粒（NP）的组装由于其在自旋电子、磁性和磁电子方面的高潜力应用而受到深入研究。对纳米粒子密度、间距和基底上的空间排列的精细控制对于通过偶极相互作用控制磁性能至关重要。在这项研究中，磁性氧化铁纳米颗粒被组装在由混合有机分子的自组装单层（SAM）图案化的表面上。改变金基底上共吸附的 11-巯基十一烷酸 (MUA) 和巯基十二烷 (MDD) 之间的摩尔比可以控制 NP 域的大小，从而调节组件的特征磁性能。此外，NP 可用于间接探测纳米尺度域中 SAM 的结构。
Assemblies of magnetic nanoparticles (NPs) are intensively studied due to their high potential applications in spintronic, magnetic and magneto-electronic. The fine control over NP density, interdistance, and spatial arrangement onto substrates is of key importance to govern the magnetic properties through dipolar interactions. In this study, magnetic iron oxide NPs have been assembled on surfaces patterned with self-assembled monolayers (SAMs) of mixed organic molecules. The modification of the molar ratio between coadsorbed 11-mercaptoundecanoic acid (MUA) and mercaptododecane (MDD) on gold substrates is shown to control the size of NPs domains and thus to modulate the characteristic magnetic properties of the assemblies. Moreover, NPs can be used to indirectly probe the structure of SAMs in domains at the nanometer scale.