Supramolecular Conducting Nanowires from Organogels

Puigmartí‐Luis, Josep; Laukhin, V. N.; Pino, A. Pérez del; Vidal-Gancedo, José; Rovira, Concepció; Laukhina, Elena; Amabilino, David B.

doi:10.1002/ange.200602483

Cited by 64 publications

(44 citation statements)

References 39 publications

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“…[71][72][73][74][75][76][77][78][79][80] In contrast to other TTF gels, the amidefunctionalized TTF derivative 30 (Scheme 7), reported by Amabilino et al, exhibited interesting electronic properties. [71] The four-probe dc resistance measurements of the doped xerogel of 30 exhibited conductivity (s) of 3-5 10 À3 W À1 cm À1 . The room temperature resistivity of the irreversible thermally converted b phase (semiconducting) of the doped xerogel was found to be one order less than that of the a phase.…”

Section: Angewandte Minireviewsmentioning

confidence: 81%

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Self‐Assembled Gelators for Organic Electronics

2012

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Nature excels at engineering materials by using the principles of chemical synthesis and molecular self-assembly with the help of noncovalent forces. Learning from these phenomena, scientists have been able to create a variety of self-assembled artificial materials of different size, shapes, and properties for wide ranging applications. An area of great interest in this regard is solvent-assisted gel formation with functional organic molecules, thus leading to one-dimensional fibers. Such fibers have improved electronic properties and are potential soft materials for organic electronic devices, particularly in bulk heterojunction solar cells. Described herein is how molecular self-assembly, which was originally proposed as a simple laboratory curiosity, has helped the evolution of a variety of soft functional materials useful for advanced electronic devices such as organic field-effect transistors and organic solar cells. Highlights on some of the recent developments are discussed.

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Section: Angewandte Minireviewsmentioning

confidence: 81%

“…[68] d) Current-sensing AFM spectroscopic curves of different areas of the xerogel of 30 on graphite. [71] Reproduced with permission from Wiley-VCH.…”

Section: Discussionmentioning

confidence: 99%

Self‐Assembled Gelators for Organic Electronics

2012

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“…[52] In two cases xerogels based on TTF derivatives have been proven to conduct electricity. [53,54] Here, we show how chemical constitution and composition as well as the surface, solvent of deposition and concentration influence in hydrogen bonded assemblies that the new compounds we report form.…”

Section: Introductionmentioning

confidence: 91%

Chemical and Constitutional Influences in the Self‐Assembly of Functional Supramolecular Hydrogen‐Bonded Nanoscopic Fibres

Puigmartí‐Luis

Minoia

Pino

et al. 2006

Chemistry A European J

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A new series of secondary amides bearing long alkyl chains with pi-electron-donor cores has been synthesized and characterised, and their self-assembly upon casting at surfaces has been studied. The different supramolecular assemblies of the materials have been visualized by using atomic force microscopy (AFM) and transmission electron microscopy (TEM). It is possible to obtain well-defined fibres of these aromatic core molecules as a result of the hydrogen bonds between the amide groups. Indeed, by altering the alkyl-chain lengths, constitutions, concentrations and solvent, it is possible to form different rodlike aggregates on graphite. Aggregate sizes with a lower limit of 6-8 nm width have been reached for different amide derivatives, while others show larger aggregates with rodlike morphologies which are several micrometers in length. For one compound that forms nanofibres, doping was performed by using a chemical oxidant, and the resulting layer on graphite was shown to exhibit metallic-like spectroscopy curves when probed with current-sensing AFM. This technique also revealed current maps of the surface of the molecular material. Fibre formation not only takes place on the graphite surface: nanometre scale rods have been imaged by using TEM on a grid after evaporation of solutions of the compounds in chloroform. Molecular modelling proves the importance of the hydrogen bonds in the generation of the fibres, and indicates that the constitution of the molecules is vital for the formation of the desired columnar stacks, results that are consistent with the images obtained by microscopic techniques. The results show the power of noncovalent bonds in self-assembly processes that can lead to electrically conducting nanoscale supramolecular wires.

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“…[12] The measured width of the fibers is on the order of 10 nm, which corresponds to a true value of approximately 1.2 nm after the shape-deconvolution procedure. Unlike the TEM measurements (Figure 1), the individual nanoparticles cannot be identified in the AFM images, because they are incorporated into the fibers and therefore masked by the conducting yarn around them.…”

Section: Dedicated To Christiane Dietrich-bucheckermentioning

confidence: 99%

Shaping Supramolecular Nanofibers with Nanoparticles Forming Complementary Hydrogen Bonds

et al. 2008

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Functionalized gold nanoparticles with complementary H‐bonding groups can control the secondary structure of xerogel fibers formed by a molecular conductor thanks to their incorporation into the nanowires, which show metal‐like conductivity once doped without the need for annealing. The picture shows a photograph of the xerogel, TEM images of Au particles in the gel and a single fiber, and an AFM image revealing the texture of the gel.

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Supramolecular Conducting Nanowires from Organogels

Cited by 64 publications

References 39 publications

Self‐Assembled Gelators for Organic Electronics

Self‐Assembled Gelators for Organic Electronics

Chemical and Constitutional Influences in the Self‐Assembly of Functional Supramolecular Hydrogen‐Bonded Nanoscopic Fibres

Shaping Supramolecular Nanofibers with Nanoparticles Forming Complementary Hydrogen Bonds

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