Wettability and Applications of Nanochannels

Jiang

2019

Adv Materials Inter

Self Cite

1D nanoconfined chemical reactions generally exhibit enhanced performance, as a consequence of nanoconfinement, yet the inherent mechanism of this nanoconfinement‐enhanced performance remains elusive. Here, the authors' perspectives on 1D nanoconfined chemical reactions are first provided, followed by the 1D nanoconfined preassembled reactions. Then, ultrafast mass transport behaviors in biological and artificial nanochannels are discussed and the quantum‐confined superfluid concept is introduced. Inspired by the programmed‐assembly reaction in living organisms, a new concept of ordered‐assembly reaction is proposed through combining quantum‐confined superfluid with frontier molecular orbital theory, to understand the inherent mechanism of high‐performance 1D nanoconfined chemical reactions. Finally, the prospective for future development of the ordered‐assembly reaction concept is presented.

Section: Quantum-confined Superfluidmentioning

confidence: 99%

Section: Quantum-confined Superfluidmentioning

confidence: 99%

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1D Nanoconfined Ordered‐Assembly Reaction

Liu

Jiang

2019

Adv Materials Inter

Self Cite

“…[30][31][32][33][34][35][36] The mechanical machining provides a great possibility for the practical application of unidirectional spreading channels in engineering due to a processing area up to a large scale (meter level), a wide range of machinable materials, and low costs. Meanwhile, in order to clarify the influence of surface wettability on the liquid unidirectional spreading performance, [37] we change the volume fraction of water ethonal solution to obtain different intrinsic contact angles. As shown in Figure 7a, the unidirectional spreading can only be detected under the condition of good surface wettability, namely a intrinsic contact angle of less than about 61°.…”

Section: Design Principles Of Unidirectional Liquid Spreading Structurementioning

confidence: 99%

Bioinspired Unidirectional Liquid Spreading Channel–Principle, Design, and Manufacture

Dong-yue

et al. 2020

Adv Materials Inter

Liquid unidirectional spreading without energy input has attracted worldwide attentions owing to its potential applications in various fields. The liquid transfer between the adjacent microcavities on the peristome of Nepenthes alata provides great inspiration in that the concave curvature edge structure has the possibility to induce liquid directional spreading. Herein, the effect of concave curvature edge on liquid spreading is found to be different from that of the solid edge described by the Gibbs inequality condition. In this condition, there exist two liquid transfer states, namely conduction and resistance. Taking the advantages of the concave curvature edge, a new unidirectional liquid spreading channel is designed and fabricated by the traditional machining method, and its liquid directional spreading function is validated. This article provides a theoretical and technical support for the design and fabrication of liquid unidirectional spreading channel without an external energy input.

“…The mechanical stimulation on Mimosa give rise to the fast flow of water through aquaporins leading to the falling down of the petiole, avoiding the damage . The “quantum tunneling fluidics effect,” recently defined as “quantum confined superfluidics (QSF)” by Jiang and coworkers, has also inspired the rapid development of artificial QSF systems, for instance, funnel‐shaped nanochannels, smart DNA hydrogels integrated nanochannels, and azobenzene‐derivatives‐modified polymer nanochannels, toward various bionic applications that involve ultrafast ion and mass transport.…”

mentioning

confidence: 99%

Quantum‐Confined‐Superfluidics‐Enabled Moisture Actuation Based on Unilaterally Structured Graphene Oxide Papers

et al. 2019

The mechanical stimulation on Mimosa give rise to the fast flow of water through aquaporins leading to the falling down of the petiole, avoiding the damage. [6][7][8] The "quantum tunneling fluidics effect," recently defined as "quantum confined superfluidics (QSF)" by Jiang and coworkers, [9] has also inspired the rapid development of artificial QSF systems, for instance, funnel-shaped nanochannels, [10] smart DNA hydrogels integrated nanochannels, [11] and azobenzene-derivatives-modified polymer nanochannels, [12] toward various bionic applications that involve ultrafast ion and mass transport.Recently, 2D materials, e.g., graphene, [13,14] graphene oxides (GO), [15][16][17] and MoS 2 , [18] have been considered extremely promising candidates for developing layered QSF system due to their tunable interlayer-spacing and nanoporous structures. For instance, GO that possesses plenty of hydrophilic oxygen groups on their plane shows strong interaction with water molecules, e.g., forming hydrogen bonds. [19][20][21] Since the interlayer spacing of GO is generally between 6-12 Å, [16,22,23] which further depends on the water contents, GO films can be considered as a natural QSF system for ultrafast water transmission. It has been reported that the diffusion of water molecules between adjacent GO sheets is ultrafast since the process features ultralow friction and large slip lengths. [24] Based on the QSF effect, Geim's group found that GO membrane allow ultrafast permeation of water, which is at least 10 10 times faster than He. [15] Subsequently, the same group demonstrated the tunable sieving of ions using GO membrane by controlling their interlayer spacing via humidity change. [16] In addition to the application in molecular/ion separation, the QSF effect of GO can also provide new design principle for other graphene-based devices such as desalination membranes, sensors, actuators, energy generation, and storage devices. [25][26][27][28][29] Taking actuators as an example, GO films enable rapid adsorption and ultrafast transmission of water molecules, which provides a feasibility of fabricating moisture responsive actuators by coupling another moisture-inert material layer. [30][31][32] Under moisture actuation, the selective adsorption of water molecules would directly generate a strain mismatch at the bilayer interface, leading to predictable deformation. However, in most cases, this kind of The strong interaction between graphene oxides (GO) and water molecules has trigged enormous research interest in developing GO-based separation films, sensors, and actuators. However, sophisticated control over the ultrafast water transmission among the GO sheets and the consequent deformation of the entire GO film is still challenging. Inspired from the natural "quantum-tunneling-fluidics-effect," here quantum-confined-superfluidicsenabled moisture actuation of GO paper by introducing periodic gratings unilaterally is reported. The folded GO nanosheets that act as quantumconfined-superfluidics channels can significantly pr...