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941 results on '"Yu, Zhong‐Zhen"'

22. Self‐Assembly of MXene‐Surfactants at Liquid–Liquid Interfaces: From Structured Liquids to 3D Aerogels

Author

Shi, Shaowei, Qian, Bingqing, Wu, Xinyu, Sun, Huilou, Wang, Haiqiao, Zhang, Hao‐Bin, Yu, Zhong‐Zhen, and Russell, Thomas P

Subjects
Macromolecular and Materials Chemistry, Chemical Sciences, Affordable and Clean Energy, aerogels, interfacial assembly, jamming, MXene surfactants, structured liquids, Organic Chemistry, Chemical sciences
Abstract

2D transition metal carbides and nitrides (MXenes), a class of emerging nanomaterials with intriguing properties, have attracted significant attention in recent years. However, owing to the highly hydrophilic nature of MXene nanosheets, assembly strategies of MXene at liquid-liquid interfaces have been very limited and challenging. Herein, through the cooperative assembly of MXene and amine-functionalized polyhedral oligomeric silsesquioxane at the oil-water interface, we report the formation, assembly, and jamming of a new type MXene-based Janus-like nanoparticle surfactants, termed MXene-surfactants (MXSs), which can significantly enhance the interfacial activity of MXene nanosheets. More importantly, this simple assembly strategy opens a new platform for the fabrication of functional MXene assemblies from mesoscale (e.g., structured liquids) to macroscale (e.g., aerogels), that can be used for a range of applications, including nanocomposites, electronic devices, and all-liquid microfluidic devices.

Published
2019

37. Human Nervous System Inspired Modified Graphene Nanoplatelets/Cellulose Nanofibers‐Based Wearable Sensors with Superior Thermal Management and Electromagnetic Interference Shielding.

Author

Zhu, Zijuan, Tian, Zhongyuan, Liu, Yanze, Yue, Shangzhi, Li, Yongji, Wang, Zhong Lin, Yu, Zhong‐Zhen, and Yang, Dan

Subjects
ELECTROMAGNETIC interference, ELECTROMAGNETIC shielding, WEARABLE technology, NANOPARTICLES, NERVOUS system, CELLULOSE fibers, TANNINS, NANOFIBERS
Abstract

Wearable sensing technologies have witnessed rapid development in recent years due to their accessibility, functionality, and affordability. However, heat accumulation and electromagnetic interference in electronic components adversely affect the sensing performance and seriously damage human health. Herein, cellulose nanofibers (CNFs)‐based composites with high thermal conductivity (TC) and excellent electromagnetic interference (EMI) shielding performance are prepared using CNFs as templates followed by coating with tannic acid non‐covalent and 3‐aminopropyltriethoxysilane covalent co‐modified graphene nanoplatelets (denoted as mGNPs) through a simple electrostatic self‐assembly method. The subsequent hot‐pressing process yield order and layer mGNPs in CNFs‐based composites with mGNPs distributed along the orientation and in close contact with CNFs, a fashion similar to the human nervous system. The resulting CNFs‐based composites reveal a high TC of 136.2 W/(m·K) and a superior EMI shielding effectiveness of 105 dB. Thus, they are used as wearable sensors based on the triboelectric effect to monitor human health in real‐time, as well as express emotion through Morse code. In sum, the proposed strategy provides an avenue to prolong the service life of flexible wearable sensors and ensure their safe use, promising for future wisdom in healthcare and smart robotics. [ABSTRACT FROM AUTHOR]

Published
2024
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