Bioinspired Graphene Actuators Prepared by Unilateral UV Irradiation of Graphene Oxide Papers

Han, Dong‐Dong; Zhang, Yong‐Lai; Liu, Yan; Liu, Yuqing; Jiang, Hao-Bo; Han, Bing; Fu, Xiu-Yan; Ding, Hong; Xu, Huailiang; Sun, Hong–Bo

doi:10.1002/adfm.201501511

Cited by 236 publications

(135 citation statements)

References 50 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…As well as fiber‐based actuators, GO is also a good candidate for building humidity actuators due to its abundance of oxygen‐containing groups . A typically layout of GO‐based humidity actuator is a GO/rGO bilayer film.…”

Section: Functional Components Of Stimesmentioning

confidence: 99%

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

et al. 2019

View full text Add to dashboard Cite

The programmable nature of smart textiles makes them an indispensable part of an emerging new technology field. Smart textile‐integrated microelectronic systems (STIMES), which combine microelectronics and technology such as artificial intelligence and augmented or virtual reality, have been intensively explored. A vast range of research activities have been reported. Many promising applications in healthcare, the internet of things (IoT), smart city management, robotics, etc., have been demonstrated around the world. A timely overview and comprehensive review of progress of this field in the last five years are provided. Several main aspects are covered: functional materials, major fabrication processes of smart textile components, functional devices, system architectures and heterogeneous integration, wearable applications in human and nonhuman‐related areas, and the safety and security of STIMES. The major types of textile‐integrated nonconventional functional devices are discussed in detail: sensors, actuators, displays, antennas, energy harvesters and their hybrids, batteries and supercapacitors, circuit boards, and memory devices.

show abstract

Section: Functional Components Of Stimesmentioning

confidence: 99%

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Using a testing device shown in Figure A, an RGO‐PDA film was placed on a hydrophobic solid plastic substrate with a centered rectangle hole that being used as a window to introduce the water vapor gradients generated through the heating of water. As shown in Figure B,C, the responsive speed of RGO‐PDA uniform thin film triggered by the vapor is very fast (Movie S3, Supporting Information) with a bending speed over 1000° s −1 , which is highly faster than the speed of previous bilayer graphene‐based actuators (13–18° s −1 ) . Furthermore, the mass fractions of PDA and RGO in the resulting films as well as the thickness of the resulting films are important issues to affect the sensitivity of the composite thin film upon the exposure to moisture gradient.…”

mentioning

confidence: 95%

“…As energy transducers, actuators can provide controllable mechanical response into 2D or 3D motions upon the trigger by external stimuli, such as electric fields, heat, light, and moisture . Therefore, the fabrication of various actuators has attracted considerable interest because of their potential promising applications including switches, microrobotics, artificial muscles, in vivo surgery devices, and motors . While light and temperature responsive actuators have often been reported, the fabrication of water/moisture/humidity or even their gradients responsive materials remains less investigated.…”

mentioning

confidence: 99%

Highly Efficient Actuator of Graphene/Polydopamine Uniform Composite Thin Film Driven by Moisture Gradients

Jiang

Xiao

Zhang

et al. 2016

Adv Materials Inter

View full text Add to dashboard Cite

upon a change in relative humidity of the surrounding air. [ 13 ] Sun et al. have demonstrated the fabrication of an energetic walking device driven by a powerful humidity responsive bilayer actuator comprising an action layer of cross-linked poly(allylamine hydrochloride)/poly(acrylic acid) (PAH/PAA) fi lms and a supporting layer of UV-cured Norland Optical Adhesive (NOA)-63. [ 8 ] Considering that graphene has many extraordinary characteristics, such as high thermal conductivity and excellent mechanical properties, it has also served as the smart water responsive actuators. [ 20 ] Ruoff et al. presented a macroscopic actuator based on graphene oxide/carbon nanotubes (GO/CNTs) bilayer fi lm to show obvious actuation that depends on variation of humidity onto water responsive materials of GO. [ 21 ] We have reported previously the asymmetric graphene/ graphene oxide (G/GO) fi ber structures obtained by positioned laser reduction of GO fi bers display well-controlled motion in a predetermined manner once exposed to moisture. [ 22 ] To realize the desired performance in a predefi ned fashion, bilayer materials or structures with different swelling behavior was necessary to mimic the strain transition among different material layers. However, as a moving component, bilayer actuators may also suffer from poor interlayer adhesion during frequent bending and complex fabrication process, etc. Moreover, concerns with respect to toughness, elasticity, and chemical/ physical stabilities also constitute a main barrier for the development of smart actuators. In this regard, from a manufacturing point of view, rational design and fabrication of actuators by refi ned control of the lateral microstructures of a solo material or even a single piece of thin fi lm might be a solution to the above-mentioned problems, but obviously, still remains big challenging. To overcome this limitation and further take advantage of the bilayer design of actuators, we present an alternative strategy in this article that a moisture gradients responsive reduced graphene oxide/polydopamine (RGO-PDA) thin fi lm, the uniform materials can serve as highly effi cient actuator driven by water absorption induced in situ formation of the bilayer structures in swelling difference. During the trigger of RGO-PDA fi lm by water with a gradient from one side, humidity-responsible hydrophilic PDA can absorb water on the surface layers of the RGO-PDA fi lm and act as soft "muscle" to active the swelling locomotion. The existing of rigid RGO sheets with relatively hydrophobic nature inside the fi lm hinders or delays the diffusion of water across the fi lm and construct the "skeleton" of the actuator which hold the PDA "muscle" to transfer the energy of water gradients to a mechanical motion.As energy transducers, actuators can provide controllable mechanical response into 2D or 3D motions upon the trigger by external stimuli, such as electric fi elds, [1][2][3][4] heat, [ 5,6 ] light, [ 7,8 ] and moisture. [ 9,10 ] Therefore, the fabrication of various actuators...

show abstract

“…A bilayer multi-walled carbon nanotubes-graphite oxide paper curled depending on humidity and/or temperature [15]. A humidity-driven graphene actuator was prepared by unilateral UV irradiation of GO papers [16]. Large area graphene was used as an ultrasensitive photothermal actuator that realizes a new prototype robotic motions under infrared-light stimuli [17].…”

Section: Introductionmentioning

confidence: 99%