Fast Thermoresponsive Optical Membrane Using Hydrogels Embedded in Macroporous Silicon

Seo, Sang‐Woo; Enemuo, Amarachukwu N.; Azmand, Hojjat Rostami

doi:10.1109/lsens.2018.2832006

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…For example, thin‐film structures described in this review can be combined with thermoresponsive hydrogels leading to films where temperature can also affect the photonic properties and lead to changes in interacting light characteristics. [ 160,161 ] This property might be further applied to distinct hydrogel structures, namely particle‐based systems [ 162 ] and films with transparency/opacity transitions above or below certain temperature levels (Figure 7b). Further, the fact that temperature can also play a role in the performance of optical‐fiber structures suggests it can also be explored for additional functionality, e.g., in the proximity of tissues at body temperature levels.…”

Section: Multi‐responsive Hydrogels In Light‐based Applicationsmentioning

confidence: 99%

Engineering Hydrogel‐Based Biomedical Photonics: Design, Fabrication, and Applications

et al. 2021

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Light guiding and manipulation in photonics have become ubiquitous in events ranging from everyday communications to complex robotics and nanomedicine. The speed and sensitivity of light–matter interactions offer unprecedented advantages in biomedical optics, data transmission, photomedicine, and detection of multi‐scale phenomena. Recently, hydrogels have emerged as a promising candidate for interfacing photonics and bioengineering by combining their light‐guiding properties with live tissue compatibility in optical, chemical, physiological, and mechanical dimensions. Herein, the latest progress over hydrogel photonics and its applications in guidance and manipulation of light is reviewed. Physics of guiding light through hydrogels and living tissues, and existing technical challenges in translating these tools into biomedical settings are discussed. A comprehensive and thorough overview of materials, fabrication protocols, and design architectures used in hydrogel photonics is provided. Finally, recent examples of applying structures such as hydrogel optical fibers, living photonic constructs, and their use as light‐driven hydrogel robots, photomedicine tools, and organ‐on‐a‐chip models are described. By providing a critical and selective evaluation of the field's status, this work sets a foundation for the next generation of hydrogel photonic research.

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Section: Multi‐responsive Hydrogels In Light‐based Applicationsmentioning

confidence: 99%

Engineering Hydrogel‐Based Biomedical Photonics: Design, Fabrication, and Applications

et al. 2021

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“…Followed by the degassing-assisted pore filling approach [20], we filled the prepared hydrogel solution into the macroporous membrane. A polydimethylsiloxane (PDMS) block with a 5 mm deep, 9 mm × 9 mm square chamber was prepared for this process.…”

Section: Porous Silicon Membrane Embedded With Au Nanorod/p-nipaam Hy...mentioning

confidence: 99%

Photothermal liquid release from arrayed Au nanorod/hydrogel composites for chemical stimulation

Seo¹,

Song²,

Azmand³

2021

J. Micromech. Microeng.

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Controlled photothermal actuation of liquid release is presented using periodically arrayed hydrogel columns in a macroporous silicon membrane. Thermo-responsive hydrogel is mixed with Gold (Au) nanorods, and surface plasmon-induced local heating by near-infrared (NIR) light is utilized as an actuation method. We adopted theoretical modeling, which treats the hydrogel as a poro-viscoelastic medium to understand the mechanical and liquid transport properties of the hydrogel. To demonstrate the feasibility of the liquid release control using NIR light, we first characterized the temperature response of Au nanorod embedded hydrogel in the silicon membrane using its optical transmission behavior to confirm the successful device fabrication. Next, the liquid release characteristics from the structure were studied using fluorescent imaging of fluorescein dye solution while pulsed NIR light was illuminated on the structure. We successfully demonstrate that the liquid release can be controlled using remote NIR illumination from the presented structure. Considering the periodically arrayed configuration with high spatial resolution, this will have a potential prospect for optically-addressable chemical release systems, which benefit retina prosthesis interfaces.

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“…Phase transition of thermo responsive p-NIPAAm hydrogel have been demonstrated using various temperature stimulus methods depending on the phase changing area/volume such as ambient medium [11,12], micro heater [13], and nanostructures [14][15][16]. Light assisted phase transition of thermo responsive hydrogels enables locally-controllable non-contact applications via light absorbing materials including metallic nanostructures, carbon nanomaterials, organic polymer materials, and organic dyes [17,18].…”

Section: Introductionmentioning

confidence: 99%

Rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane

Song

Azmand

Seo

2020

Sensors and Actuators A: Physical

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This paper presents rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane. Au nanorods are incorporated into thermo-responsive p-NIPAAm hydrogel to utilize surface plasmon-induced local heating by near-infrared light. By measuring optical transmission through the fabricated membrane structure with Au nanorod embedded hydrogel, we have demonstrated that photothermal actuation of hydrogel can be done in two-dimensional, pixel-like configuration with high spatial and temporal resolutions. Benefiting from the hydrogel volume confinement within micron-sized pores, we have achieved sub-second response time of hydrogel photothermal actuation and its repeatable photothermal actuation on highly localized illuminated area. Considering that each hydrogel column is confined within each pore and different wavelength of light can be used to induce photothermal actuation of hydrogel's deswelling characteristics by modifying physical dimensions of Au nanorods, it has a potential for optically-addressable, multiplexed drug release systems with rapid response time.

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Fast Thermoresponsive Optical Membrane Using Hydrogels Embedded in Macroporous Silicon

Cited by 12 publications

References 19 publications

Engineering Hydrogel‐Based Biomedical Photonics: Design, Fabrication, and Applications

Engineering Hydrogel‐Based Biomedical Photonics: Design, Fabrication, and Applications

Photothermal liquid release from arrayed Au nanorod/hydrogel composites for chemical stimulation

Rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane

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