Processes of Ordered Structure Formation in Polypeptide Thin Film Solutions

Botiz, Ioan; Schlaad, Helmut; Reiter, Günter

doi:10.1007/12_2010_67

Cited by 9 publications

(28 citation statements)

References 35 publications

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“…Solid thin films of PBLG (initial thickness h 0 = 50 ± 2 nm) were obtained by spincoating from chloroform solution (0.6 wt %) onto hydrophilic silicon substrates. Silicon substrates were used because interference phenomena of light reflected both at the film–air and the substrate–film interface, along with an appropriate color calibration, gave us the possibility to use an optical microscope (OM) for the determination of film thicknesses. , …”

Section: Methodsmentioning

confidence: 99%

“…Both, the experimental setup and technique used to create a thin film solution, in which nucleation and growth of PBLG crystals could be studied in situ, were described elsewhere. , In brief, the approach was based on placing the thin film on a Peltier element enclosed in a home-built chamber (see Figure a) which could be flushed either with dry nitrogen or with nitrogen saturated with solvent vapor. The Peltier element allowed to control the sample temperature (both cooling and heating were possible) and thus the amount of solvent which could condense onto a cold film.…”

Section: Methodsmentioning

confidence: 99%

“…Crystallizing PBLG molecules from thin film solutions allowed to employ optical microscopy for studying nucleation and growth of single, randomly oriented objects in real time. In previous studies of rod–coil block copolymers containing PBLG blocks as the rod parts , and also of a PBLG homopolymer, it was shown that the resulting objects were of anisotropic shape containing domains comprised of parallel stripes that were changing their orientation alternately, resulting in a zigzag pattern. So far, the internal order of these objects was not determined; i.e., it was not clear if these were crystalline objects.…”

Section: Introductionmentioning

confidence: 99%

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Crystallization of Poly(γ-benzyll-glutamate) in Thin Film Solutions: Structure and Pattern Formation

et al. 2013

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We have investigated the formation of poly(γ-benzyl l-glutamate) (PBLG) crystals from semidilute thin film solutions. Crystallization was initiated by adding methanol, a nonsolvent. After drying, each PBLG crystal possessed an internal domain structure exhibiting a zigzag pattern consisting of parallel stripes of alternating orientations between domains. X-ray scattering and electron diffraction revealed within these crystals a pseudohexagonal packing of the PBLG α-helices with their axis oriented parallel to the plane of the substrate. On the basis of optical anisotropy studies, it could be shown that the orientation of the helix axis was parallel to the stripes. While forming in solution, the objects are assumed to consist of a hexagonal columnar liquid crystalline phase. Upon drying, lateral packing density of the helices increased and resulted in a net dilative strain perpendicular to the columns, which is supposed to cause the formation of zigzag patterns.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crystallization of Poly(γ-benzyll-glutamate) in Thin Film Solutions: Structure and Pattern Formation

et al. 2013

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“…Polymer crystallization is a process of (partial) alignment of polymer chains in bulk films or solutions under specific conditions dictated by various physical and chemical parameters, including temperature [ 254 ], pressure [ 255 ], molecular weight [ 256 , 257 ], chemical structure [ 198 ], solubility [ 258 ], environment [ 259 ], type of substrate [ 19 ], etc. During crystallization, polymer chains may come together folded [ 260 ] or fully extended [ 256 ] and may form ordered domains called lamellae, which in turn give birth to spherulites.…”

Section: Bottom–up Lithographic Methodologiesmentioning

confidence: 99%

Multifunctional Structured Platforms: From Patterning of Polymer-Based Films to Their Subsequent Filling with Various Nanomaterials

Handrea-Dragan

Botiz

2021

Polymers

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There is an astonishing number of optoelectronic, photonic, biological, sensing, or storage media devices, just to name a few, that rely on a variety of extraordinary periodic surface relief miniaturized patterns fabricated on polymer-covered rigid or flexible substrates. Even more extraordinary is that these surface relief patterns can be further filled, in a more or less ordered fashion, with various functional nanomaterials and thus can lead to the realization of more complex structured architectures. These architectures can serve as multifunctional platforms for the design and the development of a multitude of novel, better performing nanotechnological applications. In this work, we aim to provide an extensive overview on how multifunctional structured platforms can be fabricated by outlining not only the main polymer patterning methodologies but also by emphasizing various deposition methods that can guide different structures of functional nanomaterials into periodic surface relief patterns. Our aim is to provide the readers with a toolbox of the most suitable patterning and deposition methodologies that could be easily identified and further combined when the fabrication of novel structured platforms exhibiting interesting properties is targeted.

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“…These processes actually dictate the final properties of polymers in bulk, solutions, or thin-films [ 16 , 17 , 18 , 19 ]. Due to the potentiality to precisely control other processing parameters, such as melting, crystallization or glass-transition temperature, a polymer can display a highly tunable molecular ordering on multiple-length scales, ranging from nanometers to macroscopic dimensions that can generate a diverse landscape of nanostructures [ 16 , 20 , 21 , 22 ]. Further expansion of this landscape on the molecular, microscopic and macroscopic scales can be induced by favoring physical and chemical interactions of specific chain segments with their neighbors [ 15 , 16 , 23 ] or by degrading the phase purity through the addition of other (polymeric) components [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Polymeric Structures Assembled on Surfaces

2021

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Pathogenic microbes are the main cause of various undesired infections in living organisms, including humans. Most of these infections are favored in hospital environments where humans are being treated with antibiotics and where some microbes succeed in developing resistance to such drugs. As a consequence, our society is currently researching for alternative, yet more efficient antimicrobial solutions. Certain natural and synthetic polymers are versatile materials that have already proved themselves to be highly suitable for the development of the next-generation of antimicrobial systems that can efficiently prevent and kill microbes in various environments. Here, we discuss the latest developments of polymeric structures, exhibiting (reinforced) antimicrobial attributes that can be assembled on surfaces and coatings either from synthetic polymers displaying antiadhesive and/or antimicrobial properties or from blends and nanocomposites based on such polymers.

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Processes of Ordered Structure Formation in Polypeptide Thin Film Solutions

Cited by 9 publications

References 35 publications

Crystallization of Poly(γ-benzyll-glutamate) in Thin Film Solutions: Structure and Pattern Formation

Crystallization of Poly(γ-benzyll-glutamate) in Thin Film Solutions: Structure and Pattern Formation

Multifunctional Structured Platforms: From Patterning of Polymer-Based Films to Their Subsequent Filling with Various Nanomaterials

Antimicrobial Polymeric Structures Assembled on Surfaces

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