Developing Biotemplated Data Storage: Room Temperature Biomineralization of L10 CoPt Magnetic Nanoparticles

被引:22
|
作者
Galloway, Johanna M. [1 ,2 ]
Talbot, Jennifer E. [3 ]
Critchley, Kevin [1 ]
Miles, Jim J. [3 ]
Bramble, Jonathan P. [1 ,4 ]
机构
[1] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
[3] Univ Manchester, Sch Comp Sci, Manchester M13 9PL, Lancs, England
[4] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
biomineralization; biotemplates; data storage; dual affinity peptides; magnetic nanoparticles; BIO-INSPIRED SYNTHESIS; BIOMIMETIC SYNTHESIS; BINDING PEPTIDES; MOLECULAR BIOMIMETICS; GOLD; NANOTECHNOLOGY; SPECIFICITY; TEMPLATES; BACTERIA; FIBERS;
D O I
10.1002/adfm.201501090
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
L1(0) cobalt platinum can be used to record data at approximately sixfold higher densities than it is possible to on existing hard disks. Currently, fabricating L1(0) CoPt requires high temperatures (approximate to 500 degrees C) and expensive equipment. One ecological alternative is to exploit biomolecules that template nanomaterials at ambient temperatures. Here, it is demonstrated that a dual affinity peptide (DAP) can be used to biotemplate L1(0) CoPt onto a surface at room temperature from an aqueous solution. One part of the peptide nucleates and controls the growth of CoPt nanoparticles from solution, and the other part binds to SiO2. A native silicon oxide surface is functionalized with a high loading of the DAP using microcontact printing. The DAP biotemplates a monolayer of uniformly sized and shaped nanoparticles when immobilized on the silicon surface. X-ray diffraction shows that the biotemplated nanoparticles have the L1(0) CoPt crystal structure, and magnetic measurements reveal stable, multiparticle zones of interaction, similar to those seen in perpendicular recording media. This is the first time that the L1(0) phase of CoPt has been formed without high temperature/vacuum treatment (e.g., annealing or sputtering) and offers a significant advancement toward developing environmentally friendly, biotemplated materials for use in data storage.
引用
收藏
页码:4590 / 4600
页数:11
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