Electrokinetic Energy Conversion in Self‐Assembled 2D Nanofluidic Channels with Janus Nanobuilding Blocks

Cheng, Hongfei; Zhou, Yi; Feng, Yining; Geng, Wen-Xiao; Liu, Qinfu; Guo, Wei; Jiang, Lei

doi:10.1002/adma.201700177

Cited by 192 publications

(153 citation statements)

References 56 publications

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“…For example, Cheng et al proved the self‐assembly of a single‐layer kaolinite with a Janus structure. This material has considerable potential in applications such as energy, environmental protection, and healthcare . However, the range of available Janus 2D materials is still limited.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

Recent Progress of Janus 2D Transition Metal Chalcogenides: From Theory to Experiments

Cheng

Huang

2018

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Since the discovery of graphene, 2D materials with various properties have gained increasing attention in fields such as novel electronic, optic, spintronic, and valleytronic devices. As an important derivative of 2D materials, Janus 2D materials, such as Janus transition metal chalcogenides (TMDs), have become a research hot spot in recent years. Janus 2D materials with mirror asymmetry display novel properties, such as the Rashba effect and normal piezoelectric polarization, providing great promise for their application in sensors, actuators, and other electromechanical devices. Here, the current theoretical and experimental progresses made in the development of Janus 2D TMDs, including their structure and stability, electronic properties, fabrication, and the results of their characterization are reported. Finally, the future prospects for the further development of Janus 2D materials are considered.

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Section: Conclusion and Prospectsmentioning

confidence: 99%

Recent Progress of Janus 2D Transition Metal Chalcogenides: From Theory to Experiments

Cheng

Huang

2018

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“…Conventional viewpoints suggest that the generated electric power would go up linearly with the increasing pore number in the membrane area . However, to date, numerous experimental efforts made to this end show very limited success . The typical power density obtained on membrane‐scale nanofluidic devices with densely packed nanopores, such as layered graphene oxide and kaolinite membrane, is below 1 W m −2 .…”

Section: Introductionmentioning

confidence: 99%

Understanding the Giant Gap between Single‐Pore‐ and Membrane‐Based Nanofluidic Osmotic Power Generators

Gao

Liu

Jiang

et al. 2019

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Nanofluidic blue energy harvesting attracts great interest due to its high power density and easy‐to‐implement nature. Proof‐of‐concept studies on single‐pore platforms show that the power density approaches up to 103 to 106 W m–2. However, to translate the estimated high power density into real high power becomes a challenge in membrane‐scale applications. The actual power density from existing membrane materials is merely several watts per square meter. Understanding the origin and thereby bridging the giant gap between the single‐pore demonstration and the membrane‐scale application is therefore highly demanded. In this work, an intuitive resistance paradigm is adopted to show that this giant gap originates from the different ion transport property in porous membrane, which is dominated by both the constant reservoir resistance and the reservoir/nanopore interfacial resistance. In this case, the generated electric power becomes saturated despite the increasing pore number. The theoretical predictions are further compared with existing experimental results in literature. For both single nanopore and multipore membrane, the simulation results excellently cover the range of the experimental results. Importantly, by suppressing the reservoir and interfacial resistances, kW m–2 to MW m–2 power density can be achieved with multipore membranes, approaching the level of a single‐pore system.

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“…For example, besides regular 2D nanomaterials, 2D zeolites, metal-organic framework nanosheets, and layered mineral materials are expected to be used in the fabrication of nanofluidic devices for energyrelated applications. [68][69][70] Furthermore, versatile responsiveness and adaptiveness, [71] as well as other asymmetric ion-transport behaviors, [72] can be built into 2D nanofluidic systems. From a technical view, mass production of high-quality 2D nanofluidic materials still meets challenges.…”

Section: Discussionmentioning

confidence: 99%

Bioinspired Energy Conversion in Nanofluidics: A Paradigm of Material Evolution

et al. 2017

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fly. Many of the well-developed structurefunction relationships in biological systems have become the inspiration for the design and application of innovative materials. [2,3] This bioinspired learning process accelerates the continuous evolution of novel man-made materials, circumventing many of the previously insurmountable challenges in, for example, architecture, aerodynamics, and materials science, etc. [4] More intriguingly, by adopting various design strategies from different natural inspirations, synthetic materials and devices keep on evolving and gaining more functions. Taking the development of aircraft for example, the wing curve of the prototype airplane mimics the streamlined shape of bird wings so as to reduce aerodynamic drag. The bat uses supersonic-based pathfinding to avoid obstacles when flying at night. Learning from this skill, modern aircraft use radar navigation systems as their "eyes". The adaptive surface coatings of aircraft mimic the micro-and nanostructures of shark skin, which greatly reduces frictional resistance, saving fuel and preventing damage from ultraviolet irradiation. As human beings constantly get new inspiration from nature, the evolution of bioinspired materials never stops.Research in nanofluidic energy conversion is enlightened by the electrogenic cells that convert transmembrane ion-concentration gradients into the release of electrical impulses by membrane-protein-regulated ion transport through the hierarchically arranged ion channels and ion pumps. [5] One particular example is electric eels (Electrophorus electricus), which are capable of generating electric shocks up to 600 V for predation and self-defense (Figure 1). Toward this goal, one research direction is to build synthetic nanofluidic devices with a minimum set of components, yet can mimic the biological energyconversion process on the nanoscale. [6] Another research direction is the multiscale integration of individual nanofluidic devices into macroscopic materials for practical use. [7] Here, we present an overview of the structural and functional evolution in synthetic one-dimensional (1D) and two-dimensional (2D) nanofluidic systems under the guidance of three different types of biological inspiration: the asymmetric ion-transport behaviors of biological ion channels, the strong bioelectric function of electric eels, and the layered microstructure of nacre. The progress, challenges, and future perspectives in this growing field are highlighted.Well-developed structure-function relationships in living systems have become inspirations for the design and application of innovative materials. Building artificial nanofluidic systems for energy conversion undergoes three essential steps of structural and functional development with the uptake of separate biological inspirations. This research field started from the mimicking of the bioelectric function of electric eels, wherein a transmembrane ion concentration gradient is converted into ultrastrong electrical impulses via membrane-protein-regulated ion tran...

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Electrokinetic Energy Conversion in Self‐Assembled 2D Nanofluidic Channels with Janus Nanobuilding Blocks

Cited by 192 publications

References 56 publications

Recent Progress of Janus 2D Transition Metal Chalcogenides: From Theory to Experiments

Recent Progress of Janus 2D Transition Metal Chalcogenides: From Theory to Experiments

Understanding the Giant Gap between Single‐Pore‐ and Membrane‐Based Nanofluidic Osmotic Power Generators

Bioinspired Energy Conversion in Nanofluidics: A Paradigm of Material Evolution

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