Raman spectroscopy based method for the evaluation of compositional consistency of nanofibrous layers

Kotzianová, Adéla; Řebíček, Jiří; Židek, Ondřej; Pokorný, Marek; Hrbáč, Jan; Velebný, Vladimı́r

doi:10.1039/c5ay02671g

Cited by 17 publications

(8 citation statements)

References 18 publications

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“…As the quality of the developed Raman system and the Raman part of the probe is comparable to commercially available systems, it can be used for routine measurements of various materials. These results confirm its quality in determining chemical composition [16]. The developed OCT system somewhat lacks in quality, as evident from the image below, however, it was sufficient for the purposes of testing the functionality of the probe.…”

Section: Resultssupporting

confidence: 62%

Non‐invasive diagnostic system and its opto‐mechanical probe for combining confocal Raman spectroscopy and optical coherence tomography

Klemeš

Kotzianová

Pokorný

et al. 2017

Journal of Biophotonics

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Non-invasive optical diagnostic methods allow important information about studied systems to be obtained in a non-destructive way. Complete diagnosis requires information about the chemical composition as well as the morphological structure of a sample. We report on the development of an opto-mechanical probe that combines Raman spectroscopy (RS) and optical coherence tomography (OCT), two methods that provide all the crucial information needed for a non-invasive diagnosis. The aim of this paper is to introduce the technical design, construction and optimization of a dual opto-mechanical probe combining two in-house developed devices for confocal RS and OCT. The unique benefit of the probe is a gradual acquisition of OCT and RS data, which allows to use the acquired OCT images to pinpoint locations of interest for RS measurements. The parameters and the correct functioning of the probe were verified by RS scanning of various samples (silicon wafer and ex vivo tissue) based on their OCT images - lateral as well as depth scanning was performed. Both the OCT and RS systems were developed, optimized and tested with the ultimate aim of verifying the functionality of the probe. Picture: Schematic illustration and visualization of the developed RS-OCT probe.

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Section: Resultssupporting

confidence: 62%

Non‐invasive diagnostic system and its opto‐mechanical probe for combining confocal Raman spectroscopy and optical coherence tomography

Klemeš

Kotzianová

Pokorný

et al. 2017

Journal of Biophotonics

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“…Raman spectroscopy of the films ( Figure 2 a) confirms the synthesis of a PEO-based material. 32 , 33 …”

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confidence: 99%

Semi-Interpenetrating Polymer Networks for Enhanced Supercapacitor Electrodes

et al. 2017

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Conducting polymers show great promise as supercapacitor materials due to their high theoretical specific capacitance, low cost, toughness, and flexibility. Poor ion mobility, however, can render active material more than a few tens of nanometers from the surface inaccessible for charge storage, limiting performance. Here, we use semi-interpenetrating networks (sIPNs) of a pseudocapacitive polymer in an ionically conductive polymer matrix to decrease ion diffusion length scales and make virtually all of the active material accessible for charge storage. Our freestanding poly(3,4-ethylenedioxythiophene)/poly(ethylene oxide) (PEDOT/PEO) sIPN films yield simultaneous improvements in three crucial elements of supercapacitor performance: specific capacitance (182 F/g, a 70% increase over that of neat PEDOT), cycling stability (97.5% capacitance retention after 3000 cycles), and flexibility (the electrodes bend to a <200 μm radius of curvature without breaking). Our simple and controllable sIPN fabrication process presents a framework to develop a range of polymer-based interpenetrated materials for high-performance energy storage technologies.

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“…Strong bands of PEO corresponding to CH twisting mode at 1235 cm −1 ; CCCOC group vibrations at 1142 cm −1 ; CCCH 2 at 1126 cm −1 coincident with the dextrin band at 1127 cm −1 ; CO stretching mode at 1061 cm −1 , coincident with the dextrin band at 1085 cm −1 ; and rocking vibrations of CH 2 at 845 and 861 cm −1 , in coincidence with dextrin band at 862 cm ‐1 can also be easily identified. The DEX/PEO 1:2 blend presents the same Raman spectrum as pure PEO fibers throughout the measured range.…”

Section: Resultsmentioning

confidence: 92%

Characterization of mechanically reinforced electrospun dextrin‐polyethylene oxide sub‐microfiber mats

Rodríguez‐Zamora

Peña‐Juárez

Cedillo‐Servín

et al. 2019

Polymer Engineering & Sci

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Dextrin and dextrin‐polyethylene oxide (DEX/PEO) fibers in the submicron range were produced by electrospinning of single and blend polymer solutions. The morphology, intermolecular interactions, and mechanical properties of dextrin microfibers with and without PEO were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X‐ray diffraction, nuclear magnetic resonance spectroscopy, and uniaxial tensile testing. Spectroscopic results confirmed hydrogen bond formation, evidencing dextrin as a molecular entanglement source for fiber mechanical reinforcement. The uniaxial tensile tests demonstrated a synergistic mechanical reinforcement effect that varied with blend composition. Equal weight ratio blends supported a maximum tensile strength with a high elastic modulus and demonstrated to be more elastic and resistant to breaking, even than pristine PEO fibers. Moreover, elastic moduli of blend fiber mats were found to lie within the value range for human skin, thus providing the DEX/PEO meshes with potential applicability as skin tissue scaffolds. This synthesis approach proved the feasible and inexpensive fabrication process of natural‐synthetic polymer hybrid fibers that combine the biocompatibility, biodegradability, and encapsulating capability of dextrin with the mechanical strength and flexibility of PEO for the development of scaffolds for tissue engineering and topical drug delivery applications in skin wound healing. POLYM. ENG. SCI., 59:1778–1786, 2019. © 2019 Society of Plastics Engineers

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Raman spectroscopy based method for the evaluation of compositional consistency of nanofibrous layers

Cited by 17 publications

References 18 publications

Non‐invasive diagnostic system and its opto‐mechanical probe for combining confocal Raman spectroscopy and optical coherence tomography

Non‐invasive diagnostic system and its opto‐mechanical probe for combining confocal Raman spectroscopy and optical coherence tomography

Semi-Interpenetrating Polymer Networks for Enhanced Supercapacitor Electrodes

Characterization of mechanically reinforced electrospun dextrin‐polyethylene oxide sub‐microfiber mats

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