Localized Ion-Beam Irradiation-Induced Wrinkle Patterns

Jeong, Hae Chang; Park, Hong Gyu; Lee, Ju Hwan; Seo, Dae Shik

doi:10.1021/acsami.5b07147

Cited by 27 publications

(22 citation statements)

References 26 publications

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“…The distribution of the wrinkled patterns is not significantly affected by the variation of hydrogel composition; in all cases, the distribution is homogenous in all directions, forming herringbone-like structures [ 35 ]. The 2D-FFT results allow us to demonstrate this affirmation due to concentrical rings with different intensities, which is a typical pattern characteristic of homogeneous wrinkled distributions that do not have any preferred ordering direction [ 36 , 37 , 38 ]. This kind of homogenous herringbone-like structure is typical of free equi-biaxial contractions [ 39 , 40 ], which, in this case, was produced by a mechanical contraction as a result of the deswelling process when the sample is dried under vacuum.…”

Section: Resultsmentioning

confidence: 84%

Wrinkling on Stimuli-Responsive Functional Polymer Surfaces as a Promising Strategy for the Preparation of Effective Antibacterial/Antibiofouling Surfaces

et al. 2021

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Biocompatible smart interfaces play a crucial role in biomedical or tissue engineering applications, where their ability to actively change their conformation or physico-chemical properties permits finely tuning their surface attributes. Polyelectrolytes, such as acrylic acid, are a particular type of smart polymers that present pH responsiveness. This work aims to fabricate stable hydrogel films with reversible pH responsiveness that could spontaneously form wrinkled surface patterns. For this purpose, the photosensitive reaction mixtures were deposited via spin-coating over functionalized glasses. Following vacuum, UV, or either plasma treatments, it is possible to spontaneously form wrinkles, which could increase cell adherence. The pH responsiveness of the material was evaluated, observing an abrupt variation in the film thickness as a function of the environmental pH. Moreover, the presence of the carboxylic acid functional groups at the interface was evidenced by analyzing the adsorption/desorption capacity using methylene blue as a cationic dye model. The results demonstrated that increasing the acrylic acid in the microwrinkled hydrogel effectively improved the adsorption and release capacity and the ability of the carboxylic groups to establish ionic interactions with methylene blue. Finally, the role of the acrylic acid groups and the surface topography (smooth or wrinkled) on the final antibacterial properties were investigated, demonstrating their efficacy against both gram-positive and gram-negative bacteria model strains (E. coli and S. Aureus). According to our findings, microwrinkled hydrogels presented excellent antibacterial properties improving the results obtained for planar (smooth) hydrogels.

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Section: Resultsmentioning

confidence: 84%

Wrinkling on Stimuli-Responsive Functional Polymer Surfaces as a Promising Strategy for the Preparation of Effective Antibacterial/Antibiofouling Surfaces

et al. 2021

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“…[ 67–73 ] Until now, composite polymer fiber structures consisting of nanomaterials including metal nanoparticles, and semiconductor nanoparticles have been showed high potential as novel multifunctional materials. [ 74–81 ] Besides, incorporation of nanostructures in electrospun polymeric fibers can be utilized to enhance mechanical strength and stability against ambient conditions for practical applications, such as wearable electronics, components and devices. In particular, HP composite nanofibers were demonstrated with such advanced features as illustrated in Figure .…”

Section: Introductionmentioning

confidence: 99%

Nano–Micro Dimensional Structures of Fiber‐Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

Ercan

Chen

2020

Macromol. Rapid Commun.

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Perovskite nanomaterials have been revealed as highly luminescent structures regarding their dimensional confinement. In particular, their promising potential lies behind remarkable luminescent properties, including color tunability, high photoluminescence quantum yield, and the narrow emission band of halide perovskite (HP) nanostructures for optoelectronic and photonic applications such as lightning and displaying operations. However, HP nanomaterials possess such drawbacks, including oxygen, moisture, temperature, or UV lights, which limit their practical applications. Recently, HP‐containing polymer composite fibers have gained much attention owing to the spatial distribution and alignment of HPs with high mechanical strength and ambient stability in addition to their remarkable optical properties comparable to that of nanocrystals. In this review, the fabrication methods for preparing nano–microdimensional HP composite fiber structures are described. Various advantages of the luminescent composite nanofibers are also described, followed by their applications for photonic and optoelectronic devices including sensors, polarizers, waveguides, lasers, light‐down converters, light‐emitting diode operations, etc. Finally, future directions and remaining challenges of HP‐based nanofibers are presented.

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“…The parameters of IB irradiation such as ion energy and incident angle determine a depth in which the hard skin layer is formed. Recently, ion beam irradiations on PDMS elastomer have been reported to produce wrinkle structures as a function of the IB irradiation parameters [12,17,18]. The wrinkle wavelength has been modulated successfully in range of 0.75-1.95 μm by changing IB energy from 800 eV to 2000 eV [18].…”

Section: Introductionmentioning

confidence: 99%

Collisional Ion Energy Transfer Model for Understanding Wrinkles on Poly (dimethylsiloxane) Surfaces after Oxygen Ion Beam Irradiations

Lee

Yang

Jung

et al. 2018

Appl. Sci. Converg. Technol.

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We introduce a collisional ion energy transfer model to understand wrinkle wavelengths on poly (dimethylsiloxane) surfaces after ion beam irradiations. The collisional ion energy transfer model uses a Monte Carlo simulation and a full molecular method to predict the thickness of a hard skin layer produced by ion beam irradiations on poly (dimethylsiloxane) surfaces. Oxygen ion beam irradiations were conducted to verify the theoretical model. To make wrinkles with wavelength in the range of 0.6-1.0 µm, the model derived appropriate ion energies of 700-1,000 eV. Oxygen ion beams with the average energy of 707, 800, 901, and 1,043 eV were exposed on the polymer surfaces, which showed randomly distributed wrinkle patterns with wavelengths of 0.63 ± 0.25, 0.84 ± 0.30, 0.93 ± 0.32, 1.27 ± 0.42 µm, respectively. The wavelengths observed through the experiments showed consistency with the collisional ion energy transfer model.

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Localized Ion-Beam Irradiation-Induced Wrinkle Patterns

Cited by 27 publications

References 26 publications

Wrinkling on Stimuli-Responsive Functional Polymer Surfaces as a Promising Strategy for the Preparation of Effective Antibacterial/Antibiofouling Surfaces

Wrinkling on Stimuli-Responsive Functional Polymer Surfaces as a Promising Strategy for the Preparation of Effective Antibacterial/Antibiofouling Surfaces

Nano–Micro Dimensional Structures of Fiber‐Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

Collisional Ion Energy Transfer Model for Understanding Wrinkles on Poly (dimethylsiloxane) Surfaces after Oxygen Ion Beam Irradiations

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