Responsive Hydrogel

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Sergiy Minko - One of the best experts on this subject based on the ideXlab platform.

  • stimuli Responsive Hydrogel thin films
    Soft Matter, 2009
    Co-Authors: Ihor Tokarev, Sergiy Minko
    Abstract:

    In this brief review we address a range of interesting applications and prospects of Responsive Hydrogel thin films for the fabrication of “smart” Responsive surfaces, membranes, sensors with various transduction mechanisms, micro/nanoactuators, and capsules. We show that Hydrogel thin films compete with grafted polymers and demonstrate strong advantages for the fabrication of robust multifunctional and multiResponsive surfaces. This article reviews recent publications on the synthesis of Responsive Hydrogel thin films and hybrid films with entrapped nanoparticles and reagents by the chemical crosslinking of reactive polymers, layer-by-layer deposition, and block-copolymer self-assembly, as well as examining those publications to determine a range of applications.

  • Stimuli-Responsive Hydrogel membranes coupled with biocatalytic processes
    ACS Applied Materials and Interfaces, 2009
    Co-Authors: Ihor Tokarev, Venkateshwarlu Gopishetty, Mikhail Motornov, Evgeny Katz, Marcos Pita, Jian Zhou, Sergiy Minko
    Abstract:

    A nanostructured signal-Responsive thin Hydrogel membrane was coupled with enzyme-based systems to yield "smart" multisignal-Responsive hybrid systems with built-in "logic". The enzyme systems transduce biochemical input signals into structural changes of the membrane, thus resulting in the amplification of the biochemical signals and their transformation into the gated transport of molecules through the membrane. Coupling of the biocatalytic systems with a stimuli-Responsive membrane is a promising approach for the development of materials that can regulate transport and release of chemicals/drugs by receiving and processing the biochemical information via biochemical reactions.

  • Stimuli-Responsive Hydrogel thin films
    Soft Matter, 2009
    Co-Authors: Ihor Tokarev, Sergiy Minko
    Abstract:

    In this brief review we address a range of interesting applications and prospects of Responsive Hydrogel thin films for the fabrication of ``smart'' Responsive surfaces, membranes, sensors with various transduction mechanisms, micro/nanoactuators, and capsules. We show that Hydrogel thin films compete with gra

Ihor Tokarev - One of the best experts on this subject based on the ideXlab platform.

  • stimuli Responsive Hydrogel thin films
    Soft Matter, 2009
    Co-Authors: Ihor Tokarev, Sergiy Minko
    Abstract:

    In this brief review we address a range of interesting applications and prospects of Responsive Hydrogel thin films for the fabrication of “smart” Responsive surfaces, membranes, sensors with various transduction mechanisms, micro/nanoactuators, and capsules. We show that Hydrogel thin films compete with grafted polymers and demonstrate strong advantages for the fabrication of robust multifunctional and multiResponsive surfaces. This article reviews recent publications on the synthesis of Responsive Hydrogel thin films and hybrid films with entrapped nanoparticles and reagents by the chemical crosslinking of reactive polymers, layer-by-layer deposition, and block-copolymer self-assembly, as well as examining those publications to determine a range of applications.

  • Stimuli-Responsive Hydrogel membranes coupled with biocatalytic processes
    ACS Applied Materials and Interfaces, 2009
    Co-Authors: Ihor Tokarev, Venkateshwarlu Gopishetty, Mikhail Motornov, Evgeny Katz, Marcos Pita, Jian Zhou, Sergiy Minko
    Abstract:

    A nanostructured signal-Responsive thin Hydrogel membrane was coupled with enzyme-based systems to yield "smart" multisignal-Responsive hybrid systems with built-in "logic". The enzyme systems transduce biochemical input signals into structural changes of the membrane, thus resulting in the amplification of the biochemical signals and their transformation into the gated transport of molecules through the membrane. Coupling of the biocatalytic systems with a stimuli-Responsive membrane is a promising approach for the development of materials that can regulate transport and release of chemicals/drugs by receiving and processing the biochemical information via biochemical reactions.

  • Stimuli-Responsive Hydrogel thin films
    Soft Matter, 2009
    Co-Authors: Ihor Tokarev, Sergiy Minko
    Abstract:

    In this brief review we address a range of interesting applications and prospects of Responsive Hydrogel thin films for the fabrication of ``smart'' Responsive surfaces, membranes, sensors with various transduction mechanisms, micro/nanoactuators, and capsules. We show that Hydrogel thin films compete with gra

Jason Locklin - One of the best experts on this subject based on the ideXlab platform.

  • advances in smart materials stimuli Responsive Hydrogel thin films
    Journal of Polymer Science Part B, 2013
    Co-Authors: Evan M. White, Jeremy Yatvin, Joe B. Grubbs, Jenna A. Bilbrey, Jason Locklin
    Abstract:

    This review highlights recent developments in the field of stimuli-Responsive Hydrogels, focusing primarily on thin films, with a thickness range between 100 nm to 10 μm. The theory and dynamics of Hydrogel swelling is reviewed, followed by specific applications. Gels are classified based on the active stimulus—mechanical, chemical, pH, heat, and light—and fabrication methods, design constraints, and novel stimuli-responses are discussed. Often, these materials display large physiochemical reactions to a relatively small stimulus. Noteworthy materials larger than 10 μm, but with response times on the order of seconds to minutes are also discussed. Hydrogels have the potential to advance the fields of medicine and polymer science as useful substrates for “smart” devices. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1084–1099

  • Advances in smart materials: Stimuli-Responsive Hydrogel thin films
    Journal of Polymer Science, Part B: Polymer Physics, 2013
    Co-Authors: Evan M. White, Jeremy Yatvin, Joe B. Grubbs, Jenna A. Bilbrey, Jason Locklin
    Abstract:

    This review highlights recent developments in the field of stimuli-Responsive Hydrogels, focusing primarily on thin films, with a thickness range between 100 nm to 10 lm. The theory and dynamics of Hydrogel swelling is reviewed, fol- lowed by specific applications. Gels are classified based on the active stimulus—mechanical, chemical, pH, heat, and light— and fabrication methods, design constraints, and novel stimuli- responses are discussed. Often, these materials display large physiochemical reactions to a relatively small stimulus. Noteworthy materials larger than 10 lm, but with response times on the order of seconds to minutes are also discussed. Hydrogels have the potential to advance the fields of medicine and polymer science as useful substrates for “smart” devices.

Hiroaki Onoe - One of the best experts on this subject based on the ideXlab platform.

  • Locally Bendable Stimuli-Responsive Hydrogel Actuator with Axially Patterned Functional Materials
    2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS), 2020
    Co-Authors: Nobuki Takeuchi, Shunsuke Nakajima, Ryuji Kawano, Yutaka Hori, Hiroaki Onoe
    Abstract:

    This paper describes a locally bendable stimuli-Responsive Hydrogel actuator with axially patterned functional materials fabricated by a valve-controlled microfluidic device. By application of an external stimuli to the complete actuator, it can be locally bended owing to the axial pattern of the Responsive and non-Responsive material. These materials are axially patterned on a microfiber through the Y-shaped channel coupled with the open/close motion of the valves in the microfluidic device. The microfluidic device can regulate the on/off of the flow by thin membrane pneumatic valves controlled by a computer. The patterning frequency of the two materials in the microfiber could be adjusted by modifying the switching intervals of the solutions. Also, we successfully demonstrated the curvature-change through heating and cooling. We believe that this locally bendable stimuli-Responsive Hydrogel could contribute to microfiber-shaped soft actuators, biomedical sensors, and self-assembly of complex 3D microstructures.

  • Soft Spiral-Shaped Micro-Swimmer with Propulsion Force Control by Pitch Change
    2019 20th International Conference on Solid-State Sensors Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII), 2019
    Co-Authors: Koki Yoshida, Hiroaki Onoe
    Abstract:

    This paper describes a soft spiral-shaped micro-swimmer with propulsion force controlled by pitch change. Soft spiral-shaped micro-swimmers, made of stimuli-Responsive Hydrogel encapsulating magnetic nanoparticles, were continuously formed by using a bevel-tip capillary. We achieved the pitch change of the double-layered micro-swimmer by temperature stimulus and confirmed that the propulsion force of the swimmer was controlled by the pitch change. We believe that our micro-swimmer could pave the way to various microscale biochemical applications such as autonomous soft-robots and soft micro-probes for intricate environment.

  • Spring-shaped stimuli-Responsive Hydrogel actuator with large deformation
    Sensors and Actuators B-chemical, 2018
    Co-Authors: Koki Yoshida, Shunsuke Nakajima, Ryuji Kawano, Hiroaki Onoe
    Abstract:

    Abstract This study describes a novel microfluidics-based method for compressive/expanding actuation of stimuli-Responsive Hydrogel microsprings with large deformations. A continuous flow of mixed alginate and poly(N-isopropylacrylamide-co-acrylic acid) pre-gel solution can spontaneously form a Hydrogel microspring with a wide range of gradient pitches via buoyancy force. This technique enables fabrication of Hydrogel microsprings using only simple capillaries and syringe pumps. The resulting microsprings can be patterned via laminar flow inside the capillary, which can contribute to large deformation. Single-layered Hydrogel microsprings shrunk isotropically while maintaining the shape of the spring. Compressing stimuli-Responsive microsprings can be done by patterning the shrinking part of the spring. Here, the degree of compression in the double-layered spring depends on the initial pitch. Furthermore, large axial expansion of microsprings can be achieved by shrinking part of a microspring. Our large compression/expansion stimuli-Responsive Hydrogel microsprings have immense potential to be applied in various microengineering products including soft actuators, chemical sensors, and medical applications.

  • Spring-shaped stimuli-Responsive Hydrogel actuator for magnifying compression and expansion motions
    2018 IEEE Micro Electro Mechanical Systems (MEMS), 2018
    Co-Authors: Koki Yoshida, Shunsuke Nakajima, Ryuji Kawano, Hiroaki Onoe
    Abstract:

    This study describes stimuli-Responsive Hydrogel micro-actuators for compressive/expanding actuation of stimuli-Responsive Hydrogels. Inspired by living bioactuators such as a stalk in vorticella, we applied this spring-shaped structure to engineered stimuli-Responsive Hydrogel actuators to magnify its degree of deformation. We achieved the shrinkage degree of ~0.2, which is the approximately 2 time smaller than that of bulk Hydrogel material (shrinkage degree ~0.4), without any modification of molecules. Furthermore, both compression and expansion motions were demonstrated by changing the pattern of stimuli-Responsive part in the microsprings, indicating that our approach could enable wide variety of motions by their patterning condition of microsprings. Our large compression/expansion stimuli-Responsive Hydrogel microsprings have immense potential to be applied in various microengineering products including soft actuators, chemical sensors, and medical applications.

  • Stimuli-Responsive Hydrogel microsprings for multiple and complex actuation
    2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), 2017
    Co-Authors: Koki Yoshida, Shunsuke Nakajima, Ryuji Kawano, Hiroaki Onoe
    Abstract:

    This paper describes stimuli-Responsive Hydrogel microsprings (SR springs) for realizing multiple and complex actuation. SR springs, made of double network Hydrogel of p(NIPAM-co-AAc) and calcium alginate, were continuously formed by using a bevel-tip capillary. The size, pitch and cross-sectional pattern of SR springs were variable by controlling flow rate, buoyancy force and laminar flow patterns during the spring formation process. By heating single-layered or double-layered SR springs, we achieved five different types of complex spring movements: cross-sectional compression, axial compression, axial expansion, winding up and winding down. We believe that our SR springs could pave the way to various microscale chemomechanical applications such as autonomous soft machines/robots and drug release systems.

Evan M. White - One of the best experts on this subject based on the ideXlab platform.

  • advances in smart materials stimuli Responsive Hydrogel thin films
    Journal of Polymer Science Part B, 2013
    Co-Authors: Evan M. White, Jeremy Yatvin, Joe B. Grubbs, Jenna A. Bilbrey, Jason Locklin
    Abstract:

    This review highlights recent developments in the field of stimuli-Responsive Hydrogels, focusing primarily on thin films, with a thickness range between 100 nm to 10 μm. The theory and dynamics of Hydrogel swelling is reviewed, followed by specific applications. Gels are classified based on the active stimulus—mechanical, chemical, pH, heat, and light—and fabrication methods, design constraints, and novel stimuli-responses are discussed. Often, these materials display large physiochemical reactions to a relatively small stimulus. Noteworthy materials larger than 10 μm, but with response times on the order of seconds to minutes are also discussed. Hydrogels have the potential to advance the fields of medicine and polymer science as useful substrates for “smart” devices. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1084–1099

  • Advances in smart materials: Stimuli-Responsive Hydrogel thin films
    Journal of Polymer Science, Part B: Polymer Physics, 2013
    Co-Authors: Evan M. White, Jeremy Yatvin, Joe B. Grubbs, Jenna A. Bilbrey, Jason Locklin
    Abstract:

    This review highlights recent developments in the field of stimuli-Responsive Hydrogels, focusing primarily on thin films, with a thickness range between 100 nm to 10 lm. The theory and dynamics of Hydrogel swelling is reviewed, fol- lowed by specific applications. Gels are classified based on the active stimulus—mechanical, chemical, pH, heat, and light— and fabrication methods, design constraints, and novel stimuli- responses are discussed. Often, these materials display large physiochemical reactions to a relatively small stimulus. Noteworthy materials larger than 10 lm, but with response times on the order of seconds to minutes are also discussed. Hydrogels have the potential to advance the fields of medicine and polymer science as useful substrates for “smart” devices.