Formation of periodic crack structures in polydiacetylene single crystal thin films

Berréhar, J.; Lapersonne‐Meyer, C.; Schott, M.; Villain, Jacques

doi:10.1051/jphys:01989005008092300

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…Other studies show that the cell volume tends to decrease with the cyclization of the molecule [4][5][6][7]. This induces local stresses in the crystal lattice, which relaxes in the cracks formation [8]. The periodicity of these cracks could be associated with a Grinfeld instability [9][10][11].…”

Section: Characterization Of Cracksmentioning

confidence: 99%

Strong Photomechanical Effects in Photochromic Organic Microcrystals

Colombier

Spagnoli

Corval

et al. 2005

Molecular Crystals and Liquid Crystals

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Photomechanical effects are observed in single crystals of a thiazole-based diarylethene. Crystalline state photochromism has been characterized by absorption microspectroscopy. Clear single crystals turn colored under ultra-violet irradiation. When the energy absorbed by crystals reaches about ten microjoules, they jump. When we prevent crystals from jumping, parallel, equidistant cracks appear due to elastic energy dissipation. These phenomena are associated with a phototransformation ratio of only a few percent.

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Section: Characterization Of Cracksmentioning

confidence: 99%

Strong Photomechanical Effects in Photochromic Organic Microcrystals

Colombier

Spagnoli

Corval

et al. 2005

Molecular Crystals and Liquid Crystals

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“…Consequently, the geometrical aspect of the problem reduces practically to the intersections of the cracks with a fixed line parallel with the stress axis. It has been observed [1,7,10,12] that the formation of a crack in the coating results in a relaxation of the stress in the vicinity of this crack so that no new crack can form close to an existing crack because of the smallness of the stress in this area. Consequently, the above-described RSA construction can be considered as a model for the crack positions.…”

Section: Introductionmentioning

confidence: 98%

Statistical and renewal results for the random sequential adsorption model applied to a unidirectional multicracking problem

Calka¹,

Mezin

Vallois

2005

Stochastic Processes and their Applications

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We work out a stationary process on the real line to represent the positions of the multiple cracks which are observed in some composites materials submitted to a fixed unidirectional stress e: Our model is the one-dimensional random sequential adsorption. We calculate the intensity of the process and the distribution of the inter-crack distance in the Palm sense. Moreover, the successive crack positions of the one-sided process (denoted by X e i ; iX1) are described. We prove that the sequence fðX e i ; Y e i Þ; 1pipng is a ''conditional renewal process'', where Y e i is the value of the stress at which X e i forms. The approaches ''in the Palm sense'' and ''one-sided process'' merge when n ! þ1: The saturation case ðe ¼ þ1Þ is also investigated. r 2005 Elsevier B.V. All rights reserved. MSC: primary 60G10; 60G55; 60K40; secondary 60B10; 60J05; 60K15

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“…19) One of the possible limiting factors is that the cracks in the thin films, which are formed during the fabrication process. 20,21) Another possible factor is the injection barriers which are caused either by the misalignment of the Fermi level of the electrode with the conduction band of the polymer or by the structural disorders at the interface. 22,23) In this paper, we demonstrate local electrical transport measurements and visualization of charge injection processes in polydiacetylene thin film grains in various environments such as in air, vacuum, and N 2 atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Visualization of Charge Injection Processes in Polydiacetylene Thin Film Grains by Dual-Probe Atomic Force Microscopy

Hirose

Tsunemi

Kobayashi

et al. 2013

Jpn. J. Appl. Phys.

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We have recently developed a dual-probe atomic force microscopy (DP-AFM) system having two AFM cantilever probes whose positions can be independently controlled with a precision on the order of ten nanometers. In this study, we visualized charge injection processes in polydiacetylene thin film grains using the DP-AFM system. One of the two probes was used to apply bias voltages to the grains while the other probe was used to obtain surface potential images of the grains. The surface potential of the polymerized grain changed according to the applied bias voltages. The potential profiles at the edge of the grain were not sharp when negative voltages were applied to the grain, which suggests the existence of an electron injection barrier at the interface. Moreover, it is suggested from the same experiment conducted in vacuum that the p-type semiconductor characteristics of the polydiacetylene is due to the O2 hole doping.

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Formation of periodic crack structures in polydiacetylene single crystal thin films

Cited by 8 publications

References 14 publications

Strong Photomechanical Effects in Photochromic Organic Microcrystals

Strong Photomechanical Effects in Photochromic Organic Microcrystals

Statistical and renewal results for the random sequential adsorption model applied to a unidirectional multicracking problem

Visualization of Charge Injection Processes in Polydiacetylene Thin Film Grains by Dual-Probe Atomic Force Microscopy

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