DNA-Templated Magnetic Nanowires with Different Compositions:  Fabrication and Analysis

Kinsella, Joseph M.; Ivanisevic, Albena

doi:10.1021/la0628571

Cited by 77 publications

(52 citation statements)

References 51 publications

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“…Earlier, Braun et al demonstrated that DNA has desired properties for templating metal structures [5]. Our group has shown that DNA can be used for the assembly of magnetic and metallic nanoparticles, creating DNA template nanowires [6]. Also, with the use of restriction endonucleases and DNA ligase, it was demonstrated through gel experiments that DNA template nanowires can be clipped at specific sequences and ligased back together [7].…”

Section: Introductionmentioning

confidence: 94%

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Circular dichroism study of enzymatic manipulation on magnetic and metallic DNA template nanowires

Jaganathan

Ivanisevic

2008

Colloids and Surfaces B: Biointerfaces

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Section: Introductionmentioning

confidence: 94%

“…The fabrication of DNA template nanowires is described in detail in Kinsella and Ivanisevic [6]. For a 1:1 DNA:NP (mass ratio) nanowire, 25 L of 536 g/mL unmethylated lambda phage DNA (Promega) in 1× MULTI-CORE TM Buffer (Promega) was added to 25 L of 1 mg/mL nanoparticle solution.…”

Section: Synthesis Of Dna Template Nanowiresmentioning

confidence: 99%

Circular dichroism study of enzymatic manipulation on magnetic and metallic DNA template nanowires

Jaganathan

Ivanisevic

2008

Colloids and Surfaces B: Biointerfaces

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“…The ligands used in the study were (2-mercaptoethyl)trimethylammonium iodide, [2-(2- obtained by assembling positively charged, 2-pyrrolidonestabilized, 4.1-nm-sized iron oxide or 3.4-nm-sized cobalt iron oxide nanoparticles on the negatively charged DNA backbone. 81 Extended DNA -FePt nanoparticle aggregates were assembled by Rotello et al through electrostatic interaction by using 37-mer duplex DNA. 82 The positively charged, 7-nm-sized FePt nanoparticles in this study were stabilized with 10-carboxydecyltrimethylammonium bromide and 11-mercaptoundecyltrimethylammonium chloride.…”

Section: Dna-based Systemsmentioning

confidence: 99%

Biologically Templated Nanostructure Assemblies

Behrens¹

2011

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Living organisms are able to manufacture a variety of sophisticated inorganic materials with precise control over chemical composition, crystal structure, and shape. Biomolecules offer unique functionalities such as specific recognition capabilities or catalytic activity. On the basis of these recognition capabilities, biological subunits are able to self‐assemble into defined superstructures with unique shapes. Furthermore, they may respond to multiple physical, chemical, or biological stimuli, and therefore provide a potential means for manufacturing nanomachines. However, naturally occurring inorganic materials are typically based on protein scaffolds with inorganic minerals, e.g., iron oxide or calcium carbonate, which limits their technical application. Hence, the knowledge of biological concepts, functions, and design features has recently been exploited for manufacturing new, technologically important, and functional inorganic nanomaterials that have no isomorphous complement in nature. One major challenge in manufacturing nanostructures by biotemplating has been the need to either modify traditional methodologies derived from chemistry or microelectronics, or to develop new synthetic pathways, in order to make the material synthesis compatible with the relatively labile biotemplates. Various chemical procedures illustrated by selected examples have been elaborated to direct the nucleation and deposition of inorganic materials (e.g., metals, alloys, or semiconductors) on bioassemblies or to link preformed inorganic building blocks to functional biomolecules. Bioassemblies template complex, multidimensional, and inorganic nanoarchitectures that are typically not available by conventional material synthesis. Recently, the templating ability of natural bioassemblies has been improved by means of genetic engineering. Moreover, it has been demonstrated that the biological functionality of the system may be retained under appropriate conditions, which allows the manufacturing of inorganic nanostructures with motility functions. The use of diverse nanostructured bioassemblies based on both proteins (e.g., cell components such as microtubules, microfilaments, S‐layers) or microorganisms (i.e., viruses, diatoms) and deoxyribonucleic acid (DNA) is discussed for their potential of templating of inorganic nanoarchitectures.

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“…41,42 We finally propose that the occurrence of areas of short-range order in twodimensional assemblies of nanoparticles may be of use for magnetic data storage purposes. It has been discussed elsewhere 1 that for the use of two-dimensional assemblies of magnetic nanoparticles, it would be "highly desirable that the ordered particles have a common magnetic easy axis."…”

Section: Initial Momentmentioning

confidence: 99%

Short-range magnetic order in two-dimensional cobalt-ferrite nanoparticle assemblies

Georgescu

Viota²,

Klokkenburg³

et al. 2008

Phys. Rev. B

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Magnetic order in two-dimensional islands of spherical 21 nm cobalt-ferrite ͑CoFe 2 O 4 ͒ nanoparticles is studied by magnetic force microscopy and spectroscopy. Images obtained at a temperature of 105 K clearly reveal the presence of repulsive and attractive areas on top of the islands. Monte Carlo simulations on hexagonal arrangements of nanoparticles have been carried out and are consistent with the experimental findings. The simulations show that the magnetization patterns are determined by a competition between interactions among the nanoparticle magnetic dipole moments and alignment of the individual moments along the easy axes of magnetization. At an elevated temperature of 500 K, it will be shown that dipole-dipole interactions lead to short-range ferromagnetic order, which fluctuates rapidly in time due to thermal excitations. Upon reduction of the temperature to 105 K, the dipole moments are forced toward the easy axes of magnetization, thereby increasing the amount of disorder.

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DNA-Templated Magnetic Nanowires with Different Compositions: Fabrication and Analysis

Cited by 77 publications

References 51 publications

Circular dichroism study of enzymatic manipulation on magnetic and metallic DNA template nanowires

Circular dichroism study of enzymatic manipulation on magnetic and metallic DNA template nanowires

Biologically Templated Nanostructure Assemblies

Short-range magnetic order in two-dimensional cobalt-ferrite nanoparticle assemblies

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