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Ruder WC, Hsu CP, Edelman BD, et al. Biological colloid engineering: Self-assembly of dipolar ferromagnetic chains in a functionalized biogenic ferrofluid. Appl Phys Lett. 2012;101(6):63701doi: 10.1063/1.4742329.
Ruder, W. C., Hsu, C. P., Edelman, B. D., Schwartz, R., & Leduc, P. R. (2012). Biological colloid engineering: Self-assembly of dipolar ferromagnetic chains in a functionalized biogenic ferrofluid. Applied physics letters, 101(6), 63701. https://doi.org/10.1063/1.4742329
Ruder, Warren C, et al. "Biological colloid engineering: Self-assembly of dipolar ferromagnetic chains in a functionalized biogenic ferrofluid." Applied physics letters vol. 101,6 (2012): 63701. doi: https://doi.org/10.1063/1.4742329
Ruder WC, Hsu CP, Edelman BD, Schwartz R, Leduc PR. Biological colloid engineering: Self-assembly of dipolar ferromagnetic chains in a functionalized biogenic ferrofluid. Appl Phys Lett. 2012 Aug 06;101(6):63701. doi: 10.1063/1.4742329. Epub 2012 Aug 07. PMID: 22952408; PMCID: PMC3427337.
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Appl Phys Lett. 2012 Aug 06;101(6):63701. doi: 10.1063/1.4742329. Epub 2012 Aug 07.

Biological colloid engineering: Self-assembly of dipolar ferromagnetic chains in a functionalized biogenic ferrofluid.

Applied physics letters

Warren C Ruder, Chia-Pei D Hsu, Brent D Edelman, Russell Schwartz, Philip R Leduc

PMID: 22952408 PMCID: PMC3427337 DOI: 10.1063/1.4742329

Abstract

We have studied the dynamic behavior of nanoparticles in ferrofluids consisting of single-domain, biogenic magnetite (Fe(3)O(4)) isolated from Magnetospirillum magnetotacticum (MS-1). Although dipolar chains form in magnetic colloids in zero applied field, when dried upon substrates, the solvent front disorders nanoparticle aggregation. Using avidin-biotin functionalization of the particles and substrate, we generated self-assembled, linear chain motifs that resist solvent front disruption in zero-field. The engineered self-assembly process we describe here provides an approach for the creation of ordered magnetic structures that could impact fields ranging from micro-electro-mechanical systems development to magnetic imaging of biological structures.

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