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283 results on '"Xia, Xiaohu"'

4. Biomimetic Stimulus Responsiveness: From Materials Design to Device Integration.

Author

Yang, Shenglin, Yang, Yixuan, Xia, Xiaohu, Zou, Bingsuo, Wang, Ben, and Zhang, Yabin

Subjects
MEDICAL robotics, MEDICAL equipment, ACTUATORS, MANUFACTURING processes, ROBOTS, BIOMIMETIC materials
Abstract

Intelligent actuators have attracted intensive attention due to their broad application scenarios, ranging from precision manufacturing and autonomous robotics to adaptive medical devices. Therein, simplifying structure design and streamlining fabrication processes for responsive materials is crucial for achieving multifunctionality in intelligent actuators. Drawing inspiration from nature, diverse stimuli‐responsive materials have been developed, enabling the creation of a broad spectrum of intelligent actuators. Herein, the study aims to provide a systematic overview of smart actuators with different stimuli‐responsive materials based on biomimetic strategies. The study commences by describing typical stimulus‐response organisms in nature, subsequently categorizing nascent stimuli‐responsive materials, and summarizing their respective responsive mechanisms. Potential applications of smart actuators integrated into all‐in‐one systems are presented for grippers, soft robots, and sensors. Finally, the study ends with an advancement summary together with personal insight into current challenges and future directions. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Strain Effect in Palladium Nanostructures as Nanozymes

Author

Xi, Zheng, primary, Cheng, Xun, additional, Gao, Zhuangqiang, additional, Wang, Mengjing, additional, Cai, Tong, additional, Muzzio, Michelle, additional, Davidson, Edwin, additional, Chen, Ou, additional, Jung, Yeonwoong, additional, Sun, Shouheng, additional, Xu, Ye, additional, and Xia, Xiaohu, additional

Published
2019
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41. Nanocrystals of platinum-group metals as peroxidase mimics for in vitro diagnostics.

Author

Wei, Zhiyuan, Xi, Zheng, Vlasov, Sergey, Ayala, Jasmin, and Xia, Xiaohu

Subjects
PLATINUM group, NANOCRYSTALS, NANOSTRUCTURED materials
Abstract

Peroxidase mimics of nanoscale materials as alternatives to natural peroxidases have found widespread uses in biomedicine. Among various types of peroxidase mimics, platinum-group metal (PGM) nanocrystals have drawn considerable attention in recent years due to their superior properties. Particularly, PGM nanocrystals display high catalytic efficiencies, allow for facile surface modifications, and possess excellent stabilities. This feature article summarizes our recent work on development of PGM nanocrystals as peroxidase mimics and exploration of their applications in in vitro diagnostics. We begin with a brief introduction to controlled synthesis of PGM nanocrystals in solution phase. We then elaborate on a variety of physicochemical parameters that can be carefully tuned to optimize the peroxidase-like properties of PGM nanocrystals. Then, we highlight the applications of PGM nanocrystals in different in vitro diagnostic platforms. We conclude this article with personal perspectives on future research directions in this emerging field, where challenges and opportunities are remarked. [ABSTRACT FROM AUTHOR]

Published
2020
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42. MXenes for Wearable Physical Sensors toward Smart Healthcare

Author

Yang, Yixuan, Yang, Shenglin, Xia, Xiaohu, Hui, Shigang, Wang, Ben, Zou, Bingsuo, Zhang, Yabin, Sun, Jianping, and Xin, John H.

Abstract

The gradual rise of personal healthcare awareness is accelerating the deployment of wearable sensors, whose ability of acquiring physiological vital signs depends on sensing materials. MXenes have distinct chemical and physical superiorities over other 2D nanomaterials for wearable sensors. This review presents a comprehensive summary of the latest advancements in MXenes-based materials for wearable physical sensors. It begins with an introduction to special structural features of MXenes for sensing performance, followed by an in-depth exploration of versatile functionalities. A detailed description of different sensing mechanisms is also included to illustrate the contribution of MXenes to the sensing performance and its improvement. In addition, the real-world applications of MXenes-based physical sensors for monitoring different physiological signs are included as well. The remaining challenges of MXenes-based materials for wearable physical sensors and their promising opportunities are finally narrated, in conjunction with a prospective for future development.

Published
2024
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43. Controllable synthesis of platinum diselenide (PtSe2) inorganic fullerene.

Author

Wang, Mengjing, Shawkat, Mashiyat Sumaiya, Xi, Zheng, Xia, Xiaohu, Lee, Kyu Seung, Son, Dong Ick, Bae, Tae-Sung, Ryu, Hyeon Ih, Chung, Hee-Suk, and Jung, Yeonwoong

Abstract

Layered transition metal dichalcogenide (TMD) crystals in reduced dimensions have exhibited a wide range of extraordinary physical and chemical properties spanning from exotic quantum phenomena to unusually superior chemical reactivity. Their anisotropic van der Waals (vdW) bonding nature enables them to commonly possess two-dimensional (2D) structures which have been rigorously investigated recently. Nonetheless, TMD crystals in quasi zero-dimensional (0D) forms, i.e., TMD fullerenes, have not been explored in depth from the perspective of reproducible synthesis and process–structure correlation. Herein, we report a controlled synthesis of inorganic fullerene platinum diselenide (PtSe2) via a thermal selenization of Pt nanostructured precursors. We identified a conversion of Pt nanocubes to PtSe2 "onion-like" fullerenes, dictated by a well-defined isotropic volume expansion. Extensive transmission electron microscopy (TEM) inspections revealed that there exists a certain size-dependency which leads to the preferable growth of PtSe2 fullerenes over 2D PtSe2 platelets. The underlying principle for this size-dependent growth is discussed in the context of surface energy minimization. Furthermore, the PtSe2 fullerenes were verified to possess a large degree of unsaturated dangling bonds as well as internal strain, verified by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) as well as a geometric phase analysis (GPA). This study sheds light on synthesizing a wide range of TMD-based fullerenes which will foster the discovery of novel physical and chemical properties in quasi 0D material systems. [ABSTRACT FROM AUTHOR]

Published
2020
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