Multitemperature Responsive Self‐Folding Soft Biomimetic Structures

Kobayashi, Kunihiko; Oh, Seung Hyun; Yoon, ChangKyu; Gracias, David H.

doi:10.1002/marc.201700692

Cited by 44 publications

(46 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Rolling or Bending For Mesostructuresmentioning

confidence: 99%

“…Such chemical sensitivity of the microgrippers is beneficial for biological applications, as some biochemicals are also proved to be able to trigger the grippers. Additionally, multitemperature‐responsive smart devices (Figure c‐vii) have also been demonstrated utilizing a bilayer structure of poly[oligo (ethylene glycol) methyl ether methacrylate] gels that swell at three different temperatures due to the varying side chain length and extent of copolymerization.…”

Section: Rolling or Bending For Mesostructuresmentioning

confidence: 99%

See 1 more Smart Citation

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

Huang

et al. 2018

Adv Materials Technologies

View full text Add to dashboard Cite

chemical vapor deposition (CVD). When it comes to on-chip integrations, these strategies are limited by accessible materials and slow processing rate, [31] and the generated defects in the produced amorphous materials placed restrictions to its further applications in high-performance devices. [32] Therefore, novel approaches and methods of fabricating 3D micro/ nanostructures are highly demanded.Rolled-up nanotechnology is an alternative technique that fabricates 3D nanostructures out of planar films called nanomembranes. Nanomembranes are defined as planar thin films with thicknesses between one to a few hundred nanometers. [33] These nanomembrane materials behave like soft materials while maintaining excellent properties like their bulk counterpart and therefore is an ideal platform for fabricating 3D nanostructures. Inspired by concepts of origami and kirigami, [34][35][36][37] researchers folded and rolled these nanomembranes into a number of fascinating 3D structures. [17,[38][39][40][41][42][43][44] Several review articles have been published with emphasis on nanomembranes thinning and manufacture, mechanical deformation, fundamental studies, and their practical applications. [33,41,[45][46][47] By releasing strain-engineered planar functional nanomembranes on sacrificial layers, complex rolled-up structures including tubes, [48][49][50][51][52][53][54] rings, [54][55][56] and helices [42,[57][58][59] can be constructed (for instance, see Figure 1f). This approach can be applied to engineer a wide range of organic and inorganic materials and their combinations, including metals, insulators, traditional semiconductor families, and recently emerged 2D materials. Given its compatibility to standard CMOS fabrication process and ability to manufacture large periodic arrays with precise geometric control, rolled-up nanotechnology further expands the applications of 3D nanostructures to a number of areas, including optical resonators, [60,61] photodetectors, [62,63] micromotors, [64][65][66] energy storage, [67] drug delivery, [68] gas detection, [53] and environmental decontamination. [69] The versatility in the materials design and geometric tuning in rolled-up nanotechnology presents tremendous opportunities for further developing sophisticated 3D fine structures.In this review, we focus on the materials perspective and fabrication process of rolled-up nanotechnology. First, we give a brief introduction of rolled-up mechanism, as well as its fabrication techniques and control strategies. We summarize and highlight recent advances of different materials systems and their corresponding rolling methodologies. Second, Rolled-up nanotechnology is an appealing technique that tunes planar films into complex 3D fine structures. The rolling-up mechanism and methodology of a huge variety of materials and their combinations are summarized, including metals, insulators, traditional semiconductor families, polymers, and recently emerged 2D materials. The basic principles of strain induction, fabrication methods, and techni...

show abstract

Section: Rolling or Bending For Mesostructuresmentioning

confidence: 99%

Section: Rolling or Bending For Mesostructuresmentioning

confidence: 99%

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

Huang

et al. 2018

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…are severallithographic strategies using X-ray,gamma-ray,electron beam,a nd photo [57][58][59][60][61][62][63] to trigger the formation or modification of an etwork at programmed regions.T he photo-initiated polymerization and crosslinking is mostc ommonly used to preparep atterned hydrogels, because (i)light is ac lean energy to trigger the reaction of monomer,o ligomer,o rp olymer,( ii) light is relatively cheap and safe, when compared to X-ray and gamma-ray,( iii)the reaction can be facilely controlled at specific regions with spatial precisionw hen guided by ap hoto mask, (iv) the methodc an generate large-area gel patterns with high fidelity and various features, and (v) multiple step patterning can be realized thanks to the open network of gel, which enables precursor solutiont od iffuse in for subsequent photo-triggered reactiona nd unreacted reagents to be removed.T his methodc an produce hydrogels with desirable size and features at specific regions or control the distribution of one component in another gel matrix. [64][65][66][67][68] Patterned hydrogels have numerousa pplicationso wing to the rich functionalities of patterned polymers and aw ide range of applicationso ft he patterns. [31,69,70] The current review highlightsr ecent advances in photolithographically patterned hydrogels and their controllable deformations.F abricating 3D patterned hydrogels by multiphoton irradiation is an exciting methodt og enerate more complex structures, [71] yetw ill not be included in this review.…”

Section: Strategies For Heterogeneous Structuresmentioning

confidence: 99%

Photolithographically Patterned Hydrogels with Programmed Deformations

Hao

et al. 2018

Chemistry An Asian Journal

View full text Add to dashboard Cite

Programmed deformations are widespread in nature, providinge legantp aradigms to design self-morphing materials with promising applications in biomedical devices, flexible electronics, soft robotics, etc. In this emerging field, hydrogels are an ideal materialt oi nvestigate the deformation principle and the structure-deformation relationship. One crucial step is to construct heterogeneouss tructures in af acile yet effective way.H erein, we provide af ocus review on different deformation modes and corresponding structural features of hydrogels. Photolithography is av ersatile approach to control the outer shape of the hydrogel and spatiald istribution of the component in the hydrogel, endowing the patterned hydrogels with programmed internal stress and thus controllable deformations. Specifically, cooperative deformations take place in periodically patterned hydrogelsw ith in-plane gradients, and multiple morphing structures are formed in one patternedh ydrogel using selective preswelling to directt he buckling of each unit. The structuralc ontrol strategy and deformation principles should be applicable to other materials with broad applications in diverseareas.

show abstract

“…Scientists have developed bioinspired systems with through‐thickness and/or in‐plane gradient structures to realize typical deformations, including bending, folding, and twisting . Reversible shape transformations or step‐by‐step deformations can be realized by incorporating different responsive polymers into one composite hydrogel . For example, Cangialosi and coworkers have patterned DNA‐cross‐linked hydrogels with multiple domains that exhibited different shape changes in response to different hairpin inputs that altered the swelling capacities of specific hydrogels .…”

Section: Swelling/contraction Ratio In Length S and Young's Modulusmentioning

confidence: 99%

“…As a consequence, step‐by‐step deformations were triggered by sequential stimulations. However, the localized deformations of the composite hydrogels were convoluted at the same length scale, and the final configuration of the hydrogel was regardless of the sequence of stimulations and the pathway of deformations . It remains a big challenge to realize programmed deformations to form 3D configurations with multilevel structures, in which the geometric features form and function at separated scales as they appear in natural systems.…”

Section: Swelling/contraction Ratio In Length S and Young's Modulusmentioning

confidence: 99%

Sequentially Controlled Deformations of Patterned Hydrogels into 3D Configurations with Multilevel Structures

Lin

Kang

et al. 2018

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Sequential deformations of patterned hydrogels into 3D configurations with multilevel structures are reported, which are realized for the first time in self‐shaping materials. The periodically patterned single‐layer hydrogels with different polymers are fabricated by multi‐step photolithography. After swelling in water, the expansion of compartmentalized high‐swelling gels is constrained by the dispersed non‐swelling gels, resulting in out‐of‐plane buckling with high cooperativity and thus forming alternating concave–convex configuration. When the dispersed non‐swelling gels are partly replaced by thermoresponsive ones, the preformed overall flat, yet locally undulant, hydrogel deforms further into dome‐, saddle‐, or sandglass‐like configurations at elevated temperature. As such, multilevel 3D structures can be achieved via prebuilt mechanical/geometric cues in a sequentially controlled manner. This conceptual design and sequential deformation of patterned hydrogels to form 3D configurations with multilevel structures should enrich the deformation/functioning modes of morphing materials and broaden their applications in diverse areas.

show abstract

Multitemperature Responsive Self‐Folding Soft Biomimetic Structures

Cited by 44 publications

References 45 publications

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

Photolithographically Patterned Hydrogels with Programmed Deformations

Sequentially Controlled Deformations of Patterned Hydrogels into 3D Configurations with Multilevel Structures

Contact Info

Product

Resources

About