Nano-Contact Transfer with Gold Nanoparticles on PEG Hydrogels and Using Wrinkled PDMS-Stamps

Yesildag, Cigdem; Tyushina, Arina; Lensen, Marga C.

doi:10.3390/polym9060199

Cited by 13 publications

(13 citation statements)

References 36 publications

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“…The silicone coil was immersed in a mixture of APTMS, methanol, and distilled water in a mass ratio of 2:20:1 at room temperature for 20 min and then washed with methanol. 25 It was then soaked in a solution of a blue dye (brilliant blue FCF, methanol, and 1 M hydrochloric acid in a mass ratio of 1:400:1) at room temperature for 20 min, washed with methanol, and dried in air. Only the portion oxidized by the UV–ozone treatment was stained blue.…”

Section: Methodsmentioning

confidence: 99%

Coil Formation of a Silicone String Using UV–Ozone Treatment

et al. 2022

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Microcoils are used in various mechanical devices. However, existing methods for producing microcoils from polymers often require expensive equipment. In this study, microcoils were prepared using a cost-effective and simple method. The material used was silicone, which is a biocompatible polymeric material. Silicone was solidified inside glass capillaries to form thin, straight strings with a diameter of 140 μm. The string was then transformed to a coil shape by oxidation using UV–ozone treatment while it was prestretched and pretwisted. The resilience force from the prestretching and pretwisting forces caused the string to bend and twist, respectively. As a result of the combination of these deformation modes, a coil was formed. As an application of the coils, an actuator was prepared, which repeatedly transforms between straight and coiled shapes. The actuation was caused by the swelling/deswelling of silicone with hexane. A large strain of 54% was obtained.

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Section: Methodsmentioning

confidence: 99%

Coil Formation of a Silicone String Using UV–Ozone Treatment

et al. 2022

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“…The Au nanorings were peeled off from the convex regions of the PDMS film and transferred onto the Au film. The nanorings that are transferred to the Au film is believed to interact with the PDMS stamp with an intermediate affinity . The interaction should be strong enough such that the nanorings can adhere well over the stamp but are also loose enough to be transferred upon the stamping process.…”

mentioning

confidence: 90%

“…The nanorings that are transferred to the Au film is believed to interact with the PDMS stamp with an intermediate affinity. 72 The interaction should be strong enough such that the nanorings can adhere well over the stamp but are also loose enough to be transferred upon the stamping process. The nanorings can, therefore, adhere to the Au film to form the desired pattern through this PDMS stamping process.…”

mentioning

confidence: 99%

Substrate-Enabled Plasmonic Color Switching with Colloidal Gold Nanorings

Chow

Lai

et al. 2020

ACS Materials Lett.

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Plasmonic colors produced by metallic metasurfaces show subwavelength spatial resolution, material simplicity, and durability. Compared to the colors created by plasmonic metasurfaces, plasmonic colors generated by colloidal plasmonic nanostructures are of narrower spectral line widths and sharper and purer chromaticity. However, difficulties in the active control of plasmonic colors hinder the development from static plasmonic color pixels into dynamic plasmonic color devices. Moreover, functional plasmon-based applications usually involve plasmonic nanostructures supported on substrates that strongly alter the plasmonic far-field scattering properties. Au nanorings are emerging plasmonic nanostructures with an intriguing ring shape and controllable plasmon wavelengths. Herein, we report on a study of the substrate effect on the far-field scattering properties of colloidal Au nanorings. The in-plane and out-of-plane plasmon modes of the Au nanorings deposited on metallic films can be excited in varying proportions, which are dependent on the incidence angle of light, producing distinct, and controllable far-field scattering plasmonic colors. Color switching is further realized on the designed patterns made out of the Au nanorings by photolithography. Our study not only provides a fundamental understanding of the substrate effect on the plasmonic properties of uncommon metal nanostructures but also opens the possibility for creating new functional metallic nanostructures for dynamic color devices and anti-counterfeiting applications.

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“…Additionally, the micropatterning of PEG-based hydrogels with gold nanoparticles allows for the fabrication of functionalized PEG-based hydrogel films [ 14 , 15 ]. The integration—and holographic assembly—of nanoparticles in turn enables the modification of optical properties on the microscale and nanoscale in the form of holographic nanoparticle-polymer composite gratings [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

UV-VIS Curable PEG Hydrogels for Biomedical Applications with Multifunctionality

Sabel‐Grau

Tyushina

Babalik

et al. 2022

Gels

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Multifunctional biomedical materials capable of integrating optical functions are highly desirable for many applications, such as advanced intra-ocular lens (IOL) implants. Therefore, poly(ethylene glycol)-diacrylate (PEG-DA) hydrogels are used with different photoinitiators (PI). In addition to standard UV PI Irgacure, Erythrosin B and Eosin Y are used as PI with high sensitivity in the optical range of the spectrum. The minimum PI concentrations for producing new hydrogels with PEG-DA and different PIs were determined. Hydrogel films were obtained, which were applicable for light-based patterning and, hence, the functionalization of surface and volume. Cytotoxicity tests confirm cytocompatibility of hydrogels and compositions. Exploiting the correlation of structure and function allows biomedical materials with multifunctionality.

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Nano-Contact Transfer with Gold Nanoparticles on PEG Hydrogels and Using Wrinkled PDMS-Stamps

Cited by 13 publications

References 36 publications

Coil Formation of a Silicone String Using UV–Ozone Treatment

Coil Formation of a Silicone String Using UV–Ozone Treatment

Substrate-Enabled Plasmonic Color Switching with Colloidal Gold Nanorings

UV-VIS Curable PEG Hydrogels for Biomedical Applications with Multifunctionality

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