Self‐Assembly of DNA‐Templated Polypyrrole Nanowires: Spontaneous Formation of Conductive Nanoropes

Pruneanu, Stela; Al-Said, Said A. Farha; Dong, L.; Hollis, Tom; Galindo, Miguel A.; Wright, N. G.; Houlton, Andrew; Horrocks, Benjamin R.

doi:10.1002/adfm.200701336

Cited by 71 publications

(104 citation statements)

References 42 publications

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“…The well‐aligned arrays of DNA patterns can be utilized as a template for conjugated polymers, imposing the electrical properties to the defined structures of DNA for further application in electronic devices . Negatively charged DNA surfaces are easily modified with positively charged CPEs to form an electrostatic complex in aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template‐Assisted Assembly of Polyfluorene Nanowires

Bae

Jeong

Kang

et al. 2016

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DNA molecules have been widely recognized as promising building blocks for constructing functional nanostructures with two main features, that is, self-assembly and rich chemical functionality. The intrinsic feature size of DNA makes it attractive for creating versatile nanostructures. Moreover, the ease of access to tune the surface of DNA by chemical functionalization offers numerous opportunities for many applications. Herein, a simple yet robust strategy is developed to yield the self-assembly of DNA by exploiting controlled evaporative assembly of DNA solution in a unique confined geometry. Intriguingly, depending on the concentration of DNA solution, highly aligned nanostructured fibrillar-like arrays and well-positioned concentric ring-like superstructures composed of DNAs are formed. Subsequently, the ring-like negatively charged DNA superstructures are employed as template to produce conductive organic nanowires on a silicon substrate by complexing with a positively charged conjugated polyelectrolyte poly[9,9-bis(6'-N,N,N-trimethylammoniumhexyl)fluorene dibromide] (PF2) through the strong electrostatic interaction. Finally, a monolithic integration of aligned arrays of DNA-templated PF2 nanowires to yield two DNA/PF2-based devices is demonstrated. It is envisioned that this strategy can be readily extended to pattern other biomolecules and may render a broad range of potential applications from the nucleotide sequence and hybridization as recognition events to transducing elements in chemical sensors.

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Section: Resultsmentioning

confidence: 99%

A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template‐Assisted Assembly of Polyfluorene Nanowires

Bae

Jeong

Kang

et al. 2016

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“…Although the material is not a pure conducting polymer, it may have a sufficiently high electrical conductivity to be useful in a variety of applications. In addition to TMV, a variety of other biological templates [46] such as DNA templates [47][48][49][50][51] have also been used to produce 1D conducting polymer nanostructures. These methods are quite useful for producing true molecular wires of conducting polymers.…”

Section: Seeding or Templating From Existing Nanoscale Materialsmentioning

confidence: 99%

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

2009

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This Progress Report provides a brief overview of current research activities in the field of one‐dimensional (1D) conducting polymer nanostructures. The synthesis, properties, and applications of these materials are outlined with a strong emphasis on recent literature examples. Chemical methods that can produce 1D nanostructures in bulk quantities are discussed in the context of two different strategies: 1) procedures that rely on a nanoscale template or additive not inherent to the polymer and 2) those that do not. The different sub‐classifications of these two strategies are delineated and the virtues and vices of each area are discussed. Following this discussion is an outline of the properties and applications of 1D conducting polymer nanostructures. This section focuses on applications in which nanostructured conducting polymers are clearly advantageous over their conventional counterparts. We conclude with our perspective on the main challenges and future research directions for this new class of nanomaterials. This Progress Report is not intended as a comprehensive review of the field, but rather a summary of select contributions that we feel will provide the reader with a strong basis for further investigation into this fast emerging field.

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“…These adjustments were introduced due to the benefits they provided in improving the structural quality DNA/Fe 3 solution was applied to a TMS-modified wafer whilst spun at 125 rpm. The wafer was then spun for a further 2 minutes at 250 rpm before the residual DNA/Fe 3 O 4 solution was withdrawn from the surface by micropipette.…”

Section: Preparation and Alignment Of L-dna-templated Fe 3 O 4 Nanowiresmentioning

confidence: 99%

Magnetic and conductive magnetite nanowires by DNA-templating

et al. 2012

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The synthesis of nanowires made of magnetite (Fe(3)O(4)) phase iron oxide was achieved using DNA as a template to direct formation of the metal oxide and confine its growth in two dimensions. This simple solution-based approach involves initial association of Fe(2+) and Fe(3+) to the DNA "template" molecules, and subsequent co-precipitation of the Fe(3)O(4) material, upon increasing the solution pH, to give the final metal oxide nanowires. Analysis of the DNA-templated material, using a combination of FTIR, XRD, XPS, and Raman spectroscopy, confirmed the iron oxide formed to be the Fe(3)O(4) crystal phase. Investigation of the structural character of the nanowires, carried out by AFM, revealed the metal oxide to form regular coatings of nanometre-scale thickness around the DNA templates. Statistical analysis showed the size distribution of the nanowires to follow a trimodal model, with the modal diameter values identified as 5-6 nm, 14-15 nm, and 23-24 nm. Additional scanning probe microscopy techniques (SCM, MFM) were also used to verify that the nanowire structures are electrically conducting and exhibit magnetic behaviour. Such properties, coupled with the small dimensions of these materials, make them potentially good candidates for application in a host of future nanoscale device technologies.

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Self‐Assembly of DNA‐Templated Polypyrrole Nanowires: Spontaneous Formation of Conductive Nanoropes

Cited by 71 publications

References 42 publications

A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template‐Assisted Assembly of Polyfluorene Nanowires

A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template‐Assisted Assembly of Polyfluorene Nanowires

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

Magnetic and conductive magnetite nanowires by DNA-templating

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