Author
Xing Chen
Other affiliations: University of Science and Technology of China, Hefei University of Technology
Bio: Xing Chen is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Surface plasmon resonance & Photodetector. The author has an hindex of 31, co-authored 137 publications receiving 3383 citations. Previous affiliations of Xing Chen include University of Science and Technology of China & Hefei University of Technology.
Papers published on a yearly basis
Papers
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TL;DR: The observation of phosphorescence from carbon dots in a polyvinyl alcohol matrix is reported, attributed to C=O bonds on the surface of carbon dots and has a very long lifetime.
404 citations
TL;DR: In this article, two kinds of microfluidic chips based on the cross-flow filtration principle were designed and fabricated by microelectromechanical system (MEMS) technology, in which parallel micropillar arrays and parallel microweirs were used to separate cells via their different sizes.
Abstract: Whole blood is a mixture of various cells, such as red blood cell (RBC), white blood cell (WBC) and so on Separation and collection of WBC and RBC, starting from a sample of whole blood, are the required steps for the subsequent clinica and basic research assays We created two kinds of microfluidic chips based on the crossflow filtration principle which can be more effective than conventional types in the area of avoiding clogging or jamming Pillar-type and weir-type filtration microchips were designed and fabricated by microelectromechanical system (MEMS) technology, in which parallel micropillar-array and parallel microweirs were used to separate cells via their different sizes After separation, WBC and RBC were collected, respectively Cell concentration and the length of separation channels were investigated and optimized Under the optimal condition, more than 95% RBC can be removed from the initial whole blood, while 274% WBC can be obtained Isolation efficiency of WBC by using the crossflow filtration microchip is approximately twice as high as that of the dead-end filtration microchip Furthermore, plasma, WBC and RBC can be simultaneously separated and collected at different outlet ports with multilevel filtration barriers
243 citations
TL;DR: Highly selective adsorption of a polypyrrole/reduced graphene oxide nanocomposite toward Hg(2+) results in electrochemically selective detection of HG(2+).
190 citations
TL;DR: A novel integrated microfluidic device that consisted of microfilter, micromixer, micropillar array, microweir, microchannel, microchamber, and porous matrix was developed to perform sample pre-treatment of whole blood to potentially enable complete detection in the fields of point-of-care genetic analysis, environmental testing, and biological warfare agent detection.
171 citations
TL;DR: It is revealed that as-prepared ZnO/CuO nanotrees array after silanization present remarkable superhydrophobic performance, which is attributed to the trapped air and hierarchical roughness, and their wettability could be manipulated by the morphologies of hierarchical ZNO nanorods.
Abstract: ZnO/CuO heterohierarchical nanotrees array has been prepared via a simple hydrothermal approach combined with thermal oxidation method on Cu substrates. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometer(XRD) are employed to characterize and analyze the as-synthesized samples. The results demonstrate that the secondary growth of ZnO nanorods enclose with CuO nanowires, leading to the formation of ZnO/CuO heterohierarchical nanotrees array. The hierarchical nanostructures have isotropic crystal symmetry and they have no 6-fold (or 4-fold or 2-fold) symmetry as general epitaxial growth. Enlightened by the similarity with microstructure of lotus, the wettability of ZnO/CuO heterohierarchical nanotrees array has been investigated. It is revealed that as-prepared ZnO/CuO nanotrees array after silanization present remarkable superhydrophobic performance, which is attributed to the trapped air and hierarchical roughness. Furthermore, their wettability could be manipulated by the morphologies of hierarchical ZnO nanorods. At the optimal condition, the greatest static angle of water droplet on the obtained heterohierarchical nanotrees array could reach almost 170°, and this substrate could be used as self-cleaning surface.
155 citations
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3,621 citations
TL;DR: Carbon quantum dots (CQDs, C-dots or CDs) have found wide use in more and more fields during the last few years as discussed by the authors, focusing on their synthetic methods, size control, modification strategies, photoelectric properties, luminescent mechanism, and applications in biomedicine, optronics, catalysis and sensor issues.
Abstract: Carbon quantum dots (CQDs, C-dots or CDs), which are generally small carbon nanoparticles (less than 10 nm in size) with various unique properties, have found wide use in more and more fields during the last few years. In this feature article, we describe the recent progress in the field of CQDs, focusing on their synthetic methods, size control, modification strategies, photoelectric properties, luminescent mechanism, and applications in biomedicine, optronics, catalysis and sensor issues.
1,733 citations
TL;DR: The properties and synthesis methods of these carbon nanodots are reviewed and emphasis is placed on their biological (both fundamental and theranostic) applications.
Abstract: The emerging graphene quantum dots (GQDs) and carbon dots (C-dots) have gained tremendous attention for their enormous potentials for biomedical applications, owing to their unique and tunable photoluminescence properties, exceptional physicochemical properties, high photostability, biocompatibility, and small size. This article aims to update the latest results in this rapidly evolving field and to provide critical insights to inspire more exciting developments. We comparatively review the properties and synthesis methods of these carbon nanodots and place emphasis on their biological (both fundamental and theranostic) applications.
1,665 citations
01 Jan 1994
TL;DR: Micromachining technology was used to prepare chemical analysis systems on glass chips that utilize electroosmotic pumping to drive fluid flow and electrophoretic separation to distinguish sample components with no moving parts.
Abstract: Micromachining technology was used to prepare chemical analysis systems on glass chips (1 centimeter by 2 centimeters or larger) that utilize electroosmotic pumping to drive fluid flow and electrophoretic separation to distinguish sample components. Capillaries 1 to 10 centimeters long etched in the glass (cross section, 10 micrometers by 30 micrometers) allow for capillary electrophoresis-based separations of amino acids with up to 75,000 theoretical plates in about 15 seconds, and separations of about 600 plates can be effected within 4 seconds. Sample treatment steps within a manifold of intersecting capillaries were demonstrated for a simple sample dilution process. Manipulation of the applied voltages controlled the directions of fluid flow within the manifold. The principles demonstrated in this study can be used to develop a miniaturized system for sample handling and separation with no moving parts.
1,412 citations