Physical properties of conducting polymer nanofibers

Duvail, Jean‐Luc; Retho, Patrice; Godon, C.; Marhic, C.; Louarn, G.; Chauvet, O.; Cuenot, Stéphane; Nysten, Bernard; Pra, L. Dauginet-De; Demoustier‐Champagne, Sophie

doi:10.1016/s0379-6779(02)00626-4

Cited by 23 publications

(16 citation statements)

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“…Consequently, there are many methods for measuring mechanical properties by AFM. The most common approach is to move the cantilever perpendicular to the plane of the substrate with the measured cantilever deflection providing normal force such as nanoindentation 42,43 or bending of a horizontally suspended nanofibre [44][45][46][47][48][49] to determine the material's Young's modulus or yield strength. Breaking strength and elongation at break are usually not measurable when using this geometry because the vertical range of motion for most AFM's is limited to a few micrometres.…”

Section: Introductionmentioning

confidence: 99%

Tensile testing of individual glassy, rubbery and hydrogel electrospun polymer nanofibres to high strain using the atomic force microscope

et al. 2013

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The production and use of polymer nanofibre assemblies prepared by electrospinning is now widespread. It is known that the tensile properties of electrospun polymer fibres can be different to those of bulk polymers. Here, we report a general method for measuring the tensile properties of individual electrospun nanofibres that employs a commercial atomic force microscope. Methods for preparing samples, force calibration and calculation of tensile stress and strain are described along with error estimation. By appropriate choice of AFM cantilever, it is shown that the tensile stress-strain curves can be measured for glassy, rubbery and gel polymer nanofibres. Testing can be in air or fluid and to strains of 300%. Example results illustrate the usefulness of the technique with the observation of high ductility in normally brittle glassy polymers such as polystyrene, and unusually large hysteresis in thermoplastic elastomer nanofibres. These observations provide new insights into the structure and mechanical behaviour of nanoscale polymeric materials. 2013 Elsevier Ltd. All rights reserved. AbstractThe production and use of polymer nanofibre assemblies prepared by electrospinning is now

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Section: Introductionmentioning

confidence: 99%

Tensile testing of individual glassy, rubbery and hydrogel electrospun polymer nanofibres to high strain using the atomic force microscope

et al. 2013

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“…[2,5,7,11] Anisotropy in conducting polymers has been attributed to the influence of polymer morphology and orientation on the effective conjugation length and the rate of interchain charge transfer. [9,12] Several conduction mechanisms have been proposed for PEDOT, and ordering of polymer chains within a film ultimately determines which mechanism dominates. [1,13] Understanding and improving the conductivity of PEDOT has been complicated in part by the difficulty in controlling the nanoscale structural order of PEDOT films.…”

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confidence: 99%

Anisotropic Properties of Conducting Polymers Prepared by Liquid Crystal Templating

Hulvat

Stupp²

2004

Advanced Materials

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“…34,35 Methods based on an AFM probe utilize either a cantilever-based arrangement where the load is applied to the end of a nanostructure, 22,36 or a simply supported arrangement where the load was applied to the middle section of the nanostructure supported over a micropore/microchannel. [14][15][16][18][19][20][36][37][38] Classical beam/ string mechanics is then employed to infer local deformations and estimate the nanomechanical properties. These techniques were further advanced by Yu et al 30 using a piezo-actuator in conjunction with AFM probe tips to nanomanipulate nanoscale specimens and use cantilever deflection to estimate the applied load.…”

Section: Introductionmentioning

confidence: 99%

A novel device for in-situ nanomechanics of 1-D nanostructures

Prakash

Kaul

Park

et al. 2011

JOM

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How would you… …describe the overall significance of this paper? The development of the in-situ test and characterization device enables the testing and characterization of mechanical properties of nanostructures, including biological materials, during high resolution nanoscale imaging. The availability of this versatile instrumentation will lead to the development of novel experiments at the nanoscale; results of these experiments will provide fundamental information about nanomechanics in nanostructured materials. …describe this work to a materials science and engineering professional with no experience in your technical specialty? The manuscript describes an insitu nanomechanical test and characterization device that takes advantage of the advanced visualization, nanomanipulation and nanopositioning capabilities of a finite element scanning electron microscope, and utilizes a highly sensitive three-plate capacitive transducer to make high-resolution displacement and force measurements in individual nanostructures. …describe this work to a layperson? Researchers all over the world are involved in investigating multi-scale mechanics of advanced nanoengineered materials and systems, including hybrid organic/inorganic structures, functional materials, high performance fibers, novel materials for energy, hard and soft tissues, to name a few. For these studies, insitu characterization of mechanical behavior at multiple length scales is essential, and the development of the nanoscale test and characterization device is expected to contribute greatly to the success and future growth of these technologies. This paper reports the development of an in-situ nanotensilometer that enables highly reliable mechanical tensile testing on individual micro-/nanoscale structures. The device features independent measurement of force and displacement histories in the specimen with nanoNewton force and sub-nanometer displacement resolutions, respectively. Moreover, the device is well suited for in-situ testing of free-standing micro/nanostructures within a high resolution scanning electron microscope, which permits continuous highresolution imaging of the specimen during straining. In order to conduct the nanomechanical tests the ends of the specimen are attached to the probe tips of the device using electron-beam induced deposition. The general capabilities and features of the nanotensilometer are illustrated by presenting results of nanomechanical tensile tests on electrospun polyaniline microfibers.

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Physical properties of conducting polymer nanofibers

Cited by 23 publications

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Tensile testing of individual glassy, rubbery and hydrogel electrospun polymer nanofibres to high strain using the atomic force microscope

Tensile testing of individual glassy, rubbery and hydrogel electrospun polymer nanofibres to high strain using the atomic force microscope

Anisotropic Properties of Conducting Polymers Prepared by Liquid Crystal Templating

A novel device for in-situ nanomechanics of 1-D nanostructures

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