Depth-resolved molecular structure and orientation of polymer thin films by synchrotron X-ray diffraction

Porzio, William; Scavia, Guido; Barba, Luisa; Arrighetti, Gianmichele; Milita, Silvia

doi:10.1016/j.eurpolymj.2010.12.007

Cited by 40 publications

(49 citation statements)

References 39 publications

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“…Edge-on orientation of P3HT is favored for: (i) spin coating from solutions in high-boiling solvents, (ii) functionalization of the SiO 2 /Si substrates with self-assembled monolayers of octadecyltrichlorosilane, REVIEW hexamethyldisilazane, or 3-aminopropyltriethoxysilane. 46,53 Face-on orientation is observed for spin coating from solutions in CHCl 3 or deposition of P3HT films by a friction transfer method. 54 Several studies of the P3HT structure by grazing incidence X-ray diffraction in spin-coated films have however demonstrated that crystalline perfection and the preferred edge-on orientation are not uniform in the bulk of the films and depend on the film thickness.…”

Section: Morphology and Structure In Thin Filmsmentioning

confidence: 99%

“…54 Several studies of the P3HT structure by grazing incidence X-ray diffraction in spin-coated films have however demonstrated that crystalline perfection and the preferred edge-on orientation are not uniform in the bulk of the films and depend on the film thickness. 46,53,55,56 For instance, enhanced crystallinity is observed at the air/P3HT film surface. Moreover, the level of preferred orientation is a function of film thickness.…”

Section: Morphology and Structure In Thin Filmsmentioning

confidence: 99%

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Structure and morphology control in thin films of regioregular poly(3‐hexylthiophene)

Brinkmann

2011

J Polym Sci B Polym Phys

367

388

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This review focuses on the structural control in thin films of regioregular poly(3-hexylthiophene) (P3HT), a workhorse among conjugated semiconducting polymers. It highlights the correlation existing between processing conditions and the resulting structures formed in thin films and in solution. Particular emphasis is put on the control of nucleation, crystallinity and orientation. P3HT can generate a large palette of morphologies in thin films including crystalline nanofibrils, spherulites, interconnected semicrystalline morphologies and nanostructured fibers, depending on the elaboration method and on the macromolecular parameters of the polymer. Effective means developed in the recent literature to control orientation of crystalline domains in thin films, especially by using epitaxial crystallization and controlled nucleation conditions are emphasized.

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Section: Morphology and Structure In Thin Filmsmentioning

confidence: 99%

Section: Morphology and Structure In Thin Filmsmentioning

confidence: 99%

Structure and morphology control in thin films of regioregular poly(3‐hexylthiophene)

Brinkmann

2011

J Polym Sci B Polym Phys

367

388

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“…14 Although there exist some important examples of using quantitative XRD to study semicrystalline, semiconducting polymer microstructures, 11,[15][16][17][18][19] Xray analysis in this field is often limited to qualitative observations. Moreover, only a few studies are able to make direct observations about interface structure using XRD.…”

mentioning

confidence: 99%

Vertical confinement and interface effects on the microstructure and charge transport of P3HT thin films

Jimison

Himmelberger

Duong

et al. 2013

J Polym Sci B Polym Phys

145

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Using X-ray diffraction-based pole figures, we present quantitative analysis of the microstructure of poly(3-hexylthiophene) thin films of varying thicknesses, which allows us to determine the crystallinity and microstructure at the semiconductor-dielectric interface. We find that the interface is approximately one fourth as crystalline as the bulk of the material. Furthermore, the use of a self-assembled monolayer (SAM) enhances the density of interface-nucleated crystallites by a factor of $20. Charge transport measurements as a function of film thickness correlate with interface crystallinity. Hence, we establish the crucial role of SAMs as nucleating agents for increasing carrier mobility in field-effect devices.

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“…Porzio et al studied the structure of thin polymer films by applying grazing incidence X-ray scattering (GIXS). Diffraction patterns from various film layers could be recorded leading to complementary structural information [37]. Moreover, one of the benefits of this approach was its ability to be used in more complex multilayer films analysis and characterization.…”

Section: Scattering Methodsmentioning

confidence: 99%

Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

2018

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Maîtrise en génie chimiqueToutefois, puisque la structure de ces films est plus complexe, le contrôle de qualité de ces derniers est plus difficile. Dans l'industrie, des méthodes hors-ligne sont très souvent utilisées pour effectuer le contrôle de qualité des films produits. Le contrôle est nécessaire puisque la variabilité de la matière première ainsi que le changement des conditions opératoires amènent des modifications qui changent considérablement les propriétés du film. Par conséquent, une inspection en temps réel ainsi qu'un contrôle des films de polymère est nécessaire sur la ligne de production afin d'obtenir un contrôle de qualité s'approchant de l'analyse en temps réel.Un système d'imagerie proche infrarouge (NIR) rapide et non-destructif est proposé pour caractériser les films biodégradables d'acide polylactique contenant du talc produits par extrusion-soufflage et utilisés pour l'emballage. Le but ultime est d'utiliser le système pour faire un contrôle de qualité sur la ligne d'extrusion ainsi qu'après le post-traitement thermique, soit le recuit. Un ensemble d'échantillon de film de PLA contenant différentes concentrations en talc ont été fabriqués. Ces derniers ont ensuite été soumis à différentes conditions de recuit. Des images NIR ont été collectées avant la caractérisation des propriétés physiques et mécaniques ainsi que l'étanchéité aux gaz. Des techniques d'imagerie multivariées ont été appliquées aux images hyperspectrales. Celles-ci ont montré que la quantité de talc peut être déterminée et que l'information du spectre NIR permet de prédire les propriétés du film. Dans tous les cas, la méthode proposée permet de déterminer les variations dans les propriétés du film avec une bonne précision. iv AbstractFood packaging plays a great role in the food industry to maintain food products quality as long as possible. Polymer films are widely used in food packaging and also attract attention because of their outstanding advantages. Since petroleum-based polymers are known to cause environmental concerns, biodegradable polymers like PLA were studied more intensively in recent years due to their environmentally friendly properties. The application of reinforced films exceeds simple ones in achieving specific functions and enhancing their properties such as barrier properties. Since the films structures are more complex, quality control is more challenging. In industry, off-line methods are vastly used for quality control of the produced films while variability in raw materials and processing conditions substantially change the film specifications. Consequently, real-time inspection and monitoring of polymer films is needed on the production line to achieve a real-time quality control of the films.A fast and non-invasive near-infrared (NIR) imaging system is proposed to characterize biodegradable polylactic acid (PLA) films containing talc, and produced by extrusion film-blowing for packaging applications. The ultimate goal is to use the system for quality control on the extrusion line, and after a po...

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Depth-resolved molecular structure and orientation of polymer thin films by synchrotron X-ray diffraction

Cited by 40 publications

References 39 publications

Structure and morphology control in thin films of regioregular poly(3‐hexylthiophene)

Structure and morphology control in thin films of regioregular poly(3‐hexylthiophene)

Vertical confinement and interface effects on the microstructure and charge transport of P3HT thin films

Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

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