Nano- and micro-patterning biotemplated magnetic CoPt arrays.
Nano- and micro-patterning biotemplated magnetic CoPt arrays.
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DOI：
10.1039/c6nr03330j
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发表时间：
2016-06
期刊：
影响因子：
6.7
通讯作者：
J. M. Galloway;J. M. Galloway;S. M. Bird;J. Talbot;P. Shepley;Ruth C. Bradley;Osama El-Zubir;Osama El-Zubir;D. Allwood;Graham J Leggett;J. Miles;Sarah S. Staniland;Kevin Critchley
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文献类型：
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作者：
J. M. Galloway;J. M. Galloway;S. M. Bird;J. Talbot;P. Shepley;Ruth C. Bradley;Osama El-Zubir;Osama El-Zubir;D. Allwood;Graham J Leggett;J. Miles;Sarah S. Staniland;Kevin Critchley
磁性纳米颗粒（MNP）的图案化薄膜可用于制造：用于操纵和分选细胞的表面，传感器，2D自旋和高密度数据存储设备。图案化磁性薄膜的传统制造并不环保，因为它使用高温（数百摄氏度）和高真空，这需要昂贵的专业设备。为了解决这些问题，我们从大自然中获得灵感，在温和的条件和简单的设备下使用生物模板肽创建环境友好的铁磁CoPt图案。使用经由干涉光刻（IL）的纳米图案化和使用微接触印刷（μCP）的微图案化在环境条件下在金表面上产生抗肽掩模。我们重新设计了一种生物模板肽（CGSGKTHEIHSPLLHK），使其在金表面自组装，并在18 °C的水中用CoPt矿化图案。铁磁CoPt是由固定化的肽生物模板，图案化的MNP保持稳定的磁畴。这项生物启发的研究为开发生物模板磁性薄膜提供了一条生态途径，用于传感，细胞操作和数据存储等应用。
Patterned thin-films of magnetic nanoparticles (MNPs) can be used to make: surfaces for manipulating and sorting cells, sensors, 2D spin-ices and high-density data storage devices. Conventional manufacture of patterned magnetic thin-films is not environmentally friendly because it uses high temperatures (hundreds of degrees Celsius) and high vacuum, which requires expensive specialised equipment. To tackle these issues, we have taken inspiration from nature to create environmentally friendly patterns of ferromagnetic CoPt using a biotemplating peptide under mild conditions and simple apparatus. Nano-patterning via interference lithography (IL) and micro-patterning using micro-contact printing (μCP) were used to create a peptide resistant mask onto a gold surface under ambient conditions. We redesigned a biotemplating peptide (CGSGKTHEIHSPLLHK) to self-assemble onto gold surfaces, and mineralised the patterns with CoPt at 18 °C in water. Ferromagnetic CoPt is biotemplated by the immobilised peptides, and the patterned MNPs maintain stable magnetic domains. This bioinspired study offers an ecological route towards developing biotemplated magnetic thin-films for use in applications such as sensing, cell manipulation and data storage.