Two-dimensional self-healing hydrogen-bond-based supramolecular polymer film

He, Mengnan; Chen, Xiaosong; Liu, Donghua; Wei, Dacheng

doi:10.1016/j.cclet.2019.01.008

Cited by 16 publications

(6 citation statements)

References 25 publications

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“…Due to their inherently delicate nature and permanent exposure to sources of chemical and mechanical damage, 2D materials can only persist when including strong and reliable self‐healing mechanisms. A pre‐requisite of self‐healing is the existence of reversibly forming bonds and the possibility of re‐alignment and re‐assembly, [ 30 ] which is fulfilled by the non‐covalent ternary interactions participating in the Lam‐111 polymerization. When shearing the polymerized Lam‐111 layers after self‐crosslinking at 500% strain, the disappearance of the elastic moduli indicates the breaking of the non‐permanent bonds ( Figure B).…”

Section: Resultsmentioning

confidence: 99%

Laminin–Dynamic Bonds Enable Multifunctionality in a Biological 2D Network

Bhuvanesh,

Nie,

Machatschek

et al. 2023

Adv Funct Materials

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A layer of laminins, assembled on a thin sheet of collagen type IV (Col‐IV) forms the backbone of the basal lamina, which controls biological processes such as embryogenesis, tissue homeostasis, and development. Here, the dynamic functions of laminin‐111 (Lam‐111) in ultrathin films at the air–water interface are investigated. It is shown that the 2D confinement induces polymerization and that expansion via adlayer formation occurs only with extended growth time. The highly robust self‐assembly enables the functionalization of surfaces with cross‐linked 2D Lam‐111 networks of defined thickness using little more than a beaker. The 2D laminin material also displays two dynamic functions required for the maintenance of tissues – the capability for self‐renewal and self‐healing. By assembling Lam‐111 2D networks at the surface of Col‐IV sheets, freestanding bilayers closely mimicking the basal lamina can be produced in vitro. There is a marked difference in miPSC spreading and adhesion force between Lam‐111 sheets assembled in the presence or absence of Col‐IV. These fundamental studies highlight the importance of dynamic functions, encoded into the molecular structure of the building blocks, for the assembly, maintenance, and functioning of the complex material systems found in natural tissues and can provide cues for the molecular design of resilient technical systems.

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Section: Resultsmentioning

confidence: 99%

Laminin–Dynamic Bonds Enable Multifunctionality in a Biological 2D Network

Bhuvanesh,

Nie,

Machatschek

et al. 2023

Adv Funct Materials

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“…The 2D organic materials are categorized into five groups: thin-film polymers, conjugated polymers, , monolayer molecular crystals, 2D supramolecular polymer films, , and 2D covalent organic frameworks (2D COFs). , Unlike one-dimensional fiber networks, true 2D polymer monolayer or few-layer materials are ultrathin sheets in which the layers are held together by π–π stacking forces (Figure e). , Among 2D polymers, monolayer molecular crystal (MMC) represents a group of organic semiconductor materials with a porous structure and molecular thickness . The 2D COFs, another type of organic crystalline materials, generally have designable π-electronic skeletons and topological structures with periodic planar networks. , Owing to the conjugated structure, Janus-type COF thin films with a porosity of 552–600 m 2 g –1 can be assembled on graphene sheets …”

Section: Fundamentals and Motivationmentioning

confidence: 99%

“…52,151,152 Monolayer InSe has mirror-plane symmetry in its honeycomb lattice. 52,153 The 2D organic materials are categorized into five groups: thin-film polymers, 154 conjugated polymers, 155,156 monolayer molecular crystals, 67 2D supramolecular polymer films, 157,158 and 2D covalent organic frameworks (2D COFs). 112,159 Unlike one-dimensional fiber networks, true 2D polymer monolayer or few-layer materials are ultrathin sheets in which the layers are held together by π−π stacking forces (Figure 2e).…”

Section: D Materialsmentioning

confidence: 99%

Two-Dimensional Field-Effect Transistor Sensors: The Road toward Commercialization

2022

Self Cite

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The evolutionary success in information technology has been sustained by the rapid growth of sensor technology. Recently, advances in sensor technology have promoted the ambitious requirement to build intelligent systems that can be controlled by external stimuli along with independent operation, adaptivity, and low energy expenditure. Among various sensing techniques, field-effect transistors (FETs) with channels made of two-dimensional (2D) materials attract increasing attention for advantages such as label-free detection, fast response, easy operation, and capability of integration. With atomic thickness, 2D materials restrict the carrier flow within the material surface and expose it directly to the external environment, leading to efficient signal acquisition and conversion. This review summarizes the latest advances of 2D-materials-based FET (2D FET) sensors in a comprehensive manner that contains the material, operating principles, fabrication technologies, proof-of-concept applications, and prototypes. First, a brief description of the background and fundamentals is provided. The subsequent contents summarize physical, chemical, and biological 2D FET sensors and their applications. Then, we highlight the challenges of their commercialization and discuss corresponding solution techniques. The following section presents a systematic survey of recent progress in developing commercial prototypes. Lastly, we summarize the long-standing efforts and prospective future development of 2D FET-based sensing systems toward commercialization.

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“…This makes hydrogen bonds suitable for use in intrinsic self-healing materials. A hydrogen-bond-based self-healing polymer was first developed by Leibler [ 54 ], who used fatty acids and urea to design and synthesize molecules that would cross-link via hydrogen bonds. Leibler discovered that the broken samples were able to heal at a room temperature of 20 degrees Celsius until scars were invisible [ 55 ].…”

Section: Self-healing Mechanisms Of Polyureamentioning

confidence: 99%

Mini-Review of Self-Healing Mechanism and Formulation Optimization of Polyurea Coating

et al. 2022

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Self-healing polymers are categorized as smart materials that are capable of surface protection and prevention of structural failure. Polyurethane/polyurea, as one of the representative coatings, has also attracted attention for industrial applications. Compared with polyurethane, polyurea coating, with a similar formation process, provides higher tensile strength and requires shorter curing time. In this paper, extrinsic and intrinsic mechanisms are reviewed to address the efficiency of the self-healing process. Moreover, formulation optimization and strategic improvement to ensure self-healing within a shorter period of time with acceptable recovery of mechanical strength are also discussed. The choice and ratio of diisocyanates, as well as the choice of chain extender, are believed to have a crucial effect on the acceleration of the self-healing process and enhance self-healing efficiency during the preparation of polyurea coatings.

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Two-dimensional self-healing hydrogen-bond-based supramolecular polymer film

Cited by 16 publications

References 25 publications

Laminin–Dynamic Bonds Enable Multifunctionality in a Biological 2D Network

Laminin–Dynamic Bonds Enable Multifunctionality in a Biological 2D Network

Two-Dimensional Field-Effect Transistor Sensors: The Road toward Commercialization

Mini-Review of Self-Healing Mechanism and Formulation Optimization of Polyurea Coating

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