Device design and optimization of sorption-based atmospheric water harvesters

Device, Год журнала: 2023, Номер 1(4), С. 100099 - 100099

Опубликована: Окт. 1, 2023

Atmospheric water harvesting (AWH) is a promising approach to providing fresh areas without access large bodies of freshwater and mitigating imbalanced distribution. Besides material innovations, researchers have explored different design strategies for these AWH devices, which can be divided into monocyclic multicyclic types. Monocyclic harvesters further categorized those using upward vapor escape, research efforts focused on reducing top cover heating increasing sorption capacity, downward heat recycling cooling enhance condensation efficiency. Notably, some devices utilize radiative require zero external energy input. For harvesters, optimizing the sorbents' uptake kinetics device geometry guarantee continuous harvesting.

Язык: Английский

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Updated perspective on solar steam generation application

Energy & Environmental Science, Год журнала: 2024, Номер 17(6), С. 2088 - 2099

Опубликована: Янв. 1, 2024

This perspective highlights the challenges and opportunities in interfacial evaporation, heat water management, materials synthesis, device development for solar steam generation.

Язык: Английский

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Ambient-conditions spinning of functional soft fibers via engineering molecular chain networks and phase separation

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Июнь 5, 2023

Producing functional soft fibers via existing spinning methods is environmentally and economically costly due to the complexity of equipment, involvement copious solvents, intensive consumption energy, multi-step pre-/post-spinning treatments. We report a nonsolvent vapor-induced phase separation approach under ambient conditions, which resembles native spider silk fibrillation. It enabled by optimal rheological properties dopes engineering silver-coordinated molecular chain interactions autonomous transition effect. Fiber fibrillation conditions using polyacrylonitrile-silver ion dope demonstrated, along with detailed elucidations on tuning spinnability through analysis. The obtained are mechanically soft, stretchable, electrically conductive, benefiting from elastic networks silver-based coordination complexes in-situ reduced silver nanoparticles. Particularly, these can be configured as wearable electronics for self-sensing self-powering applications. Our ambient-conditions provides platform create unified mechanical electrical at two-to-three order magnitude less energy cost conditions.

Язык: Английский

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High-Fidelity, Low-Hysteresis Bionic Flexible Strain Sensors for Soft Machines

ACS Nano, Год журнала: 2024, Номер 18(3), С. 2520 - 2530

Опубликована: Янв. 10, 2024

Stretchable flexible strain sensors based on conductive elastomers are rapidly emerging as a highly promising candidate for popular wearable electronic and soft-mechanical sensing devices. However, due to the intrinsic limitations of low fidelity high hysteresis, existing unable exploit their full application potential. Herein, design strategy successive three-dimensional crack network is proposed cope with uncoordinated variation output resistance signal arising from elastomer. The electrical characteristics sensor dominated by through greater concise mechanism. As result, developed elastomer bionic exhibit excellent performance in terms smaller overshoot response, lower hysteresis (∼2.9%), an ultralow detection limit (0.00179%). What's more, universal applicable many different fillers (including 0-D, 1-D, 2-D fillers). This approach improves accuracy reliability holds potential various applications fields e-skin soft robotic systems.

Язык: Английский

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A Dual‐Responsive Liquid Crystal Elastomer for Multi‐Level Encryption and Transient Information Display

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(48)

Опубликована: Окт. 11, 2023

Abstract Information security has gained increasing attention in the past decade, leading to development of advanced materials for anti‐counterfeiting, encryption and instantaneous information display. However, it remains challenging achieve high with simple procedures low‐energy stimuli. Herein, a series strain/temperature‐responsive liquid crystal elastomers (LCEs) are developed dual‐modal, multi‐level real‐time, rewritable transient The as‐prepared polydomain LCEs can change from an opaque state transparent under strain or temperature stimuli, transition strains temperatures highly dependent on concentration long‐chain flexible spacers. encrypted by different LCE inks be decrypted specific temperatures, protection security. Furthermore, combination phase photothermal effect multi‐walled carbon nanotubes (MWCNTs), we achieved repeatable display using near‐infrared (NIR) light as pen writing. This study provides new insight into versatility broad applications.

Язык: Английский

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Flexible Metasurfaces for Multifunctional Interfaces

ACS Nano, Год журнала: 2024, Номер 18(4), С. 2685 - 2707

Опубликована: Янв. 19, 2024

Optical metasurfaces, capable of manipulating the properties light with a thickness at subwavelength scale, have been subject extensive investigation in recent decades. This research has mainly driven by their potential to overcome limitations traditional, bulky optical devices. However, most existing metasurfaces are confined planar and rigid designs, functions, technologies, which greatly impede evolution toward practical applications that often involve complex surfaces. The disconnect between two-dimensional (2D) structures three-dimensional (3D) curved surfaces is becoming increasingly pronounced. In past two decades, emergence flexible electronics ushered an emerging era for metasurfaces. review delves into this cutting-edge field, focus on both conformal design fabrication techniques. Initially, we reflect milestones trajectories modern complemented brief overview theoretical underpinnings primary classifications. We then showcase four advanced emphasizing promising prospects relevance areas such as imaging, biosensing, cloaking, multifunctionality. Subsequently, explore three key trends including mechanically reconfigurable digitally controlled Finally, summarize our insights ongoing challenges opportunities field.

Язык: Английский

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Machine learning‐assisted wearable sensor array for comprehensive ammonia and nitrogen dioxide detection in wide relative humidity range

InfoMat, Год журнала: 2024, Номер 6(6)

Опубликована: Апрель 10, 2024

Abstract The fast booming of wearable electronics provides great opportunities for intelligent gas detection with improved healthcare mining workers, and a variety sensors have been simultaneously developed. However, these sensing systems are always limited to single highly susceptible the inference ubiquitous moisture, resulting in less accuracy analysis compositions real conditions. To address challenges, we propose synergistic strategy based on sensor integration machine learning algorithms realize precise NH 3 NO 2 detections under A array graphene polyaniline composite is developed largely enhance sensitivity selectivity mixed Further introduction backpropagation neural network (BP‐NN) partial least squares (PLS) could improve identification concentration prediction settle realizing over 99% theoretical level concentrations within wide relative humidity range, showing promise detection. As proof concept, wireless bracelet, integrated arrays machine‐learning algorithms, real‐time warning hazardous gases mines different image

Язык: Английский

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Can the Interfacial Solar Vapor Generation Performance Be Really “Beyond” Theoretical Limit?

Advanced Energy Materials, Год журнала: 2024, Номер 14(22)

Опубликована: Март 19, 2024

Abstract The interfacial solar vapor generation (ISVG) process is an environmentally friendly approach that utilizes to produce steam, which can solve the water shortage. Despite many previous research studies, claims beyond theoretical limit have risen due limitations in efficiency of converting and rate evaporation, are still being debated. Energy losses remain even under ideal conditions, means system will never be ≥100%. This review primarily analyzes values evaporation energy ISVG process. Utilizing a formula for distribution, factors contributing current exceedance conversion scrutinized. By examining various strategies, such as reduction vaporization enthalpy photothermal materials utilization environmental these studies seek enhance efficiencies, but they ignore problem evaporation. Therefore, this emphasizes misconceptions about efficiencies limits aims guide researchers provide plausible explanations breakthroughs specific alongside established reference conditions. Ultimately, study lays solid foundation practical purification.

Язык: Английский

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Design of AI-Enhanced and Hardware-Supported Multimodal E-Skin for Environmental Object Recognition and Wireless Toxic Gas Alarm

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Июль 29, 2024

Abstract Post-earthquake rescue missions are full of challenges due to the unstable structure ruins and successive aftershocks. Most current robots lack ability interact with environments, leading low efficiency. The multimodal electronic skin (e-skin) proposed not only reproduces pressure, temperature, humidity sensing capabilities natural but also develops functions beyond it—perceiving object proximity NO 2 gas. Its multilayer stacked based on Ecoflex organohydrogel endows e-skin mechanical properties similar skin. Rescue integrated artificial intelligence (AI) algorithms show strong environmental perception can accurately distinguish objects identify human limbs through grasping, laying foundation for automated post-earthquake rescue. Besides, combination wireless alarm circuits allows sense toxic gases in environment real time, thereby adopting appropriate measures protect trapped people from environment. Multimodal powered by AI hardware exhibits powerful information processing capabilities, which, as an interface interaction physical world, dramatically expands intelligent robots’ application scenarios.

Язык: Английский

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A Facile and Effective Design for Dynamic Thermal Management Based on Synchronous Solar and Thermal Radiation Regulation

Nano Letters, Год журнала: 2024, Номер 24(4), С. 1447 - 1453

Опубликована: Янв. 22, 2024

Passive solar heating and radiative cooling have attracted great interest in global energy consumption reduction due to their unique electricity-free advantage. However, static single radiation or would lead overcooling overheating cold hot weather, respectively. To achieve a facile, effective approach for dynamic thermal management, novel structured polyethylene (PE) film was engineered with switchable mode obtained through moisture transfer technique. The 100 μm PE showed excellent modulation from 0.92 (dried state) 0.32 (wetted 0.86 0.05 state). Outdoor experiments demonstrated regulation during both daytime nighttime. Furthermore, our designed can save 1.3-41.0% of annual across the whole country China. This dual mechanism is very promising guiding scalable approaches energy-saving temperature regulation.

Язык: Английский

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