Synthesis, Functionalization, and Biomedical Applications of Multifunctional Magnetic NanoparticlesRui Hao, Ruijun Xing, Zhichuan J. Xu et al.|Advanced Materials|2010 Synthesis of multifunctional magnetic nanoparticles (MFMNPs) is one of the most active research areas in advanced materials. MFMNPs that have magnetic properties and other functionalities have been demonstrated to show great promise as multimodality imaging probes. Their multifunctional surfaces also allow rational conjugations of biological and drug molecules,making it possible to achieve target-specific diagnostics and therapeutics.This review fi rst outlines the synthesis of MNPs of metal oxides and alloy sand then focuses on recent developments in the fabrication of MFMNPs of core/shell, dumbbell, and composite hybrid type. It also summarizes the general strategies applied for NP surface functionalization. The review further highlights some exciting examples of these MFMNPs for multimodality imaging and for target-specific drug/gene delivery applications.
Synthesis of amino-functionalized graphene as metal-free catalyst and exploration of the roles of various nitrogen states in oxygen reduction reactionAqueous dispersions of TCNQ-anion-stabilized graphene sheetsRui Hao, Qian Wen, Luhui Zhang et al.|Chemical Communications|2008 Aqueous dispersed graphene was successfully prepared via using 7,7,8,8-tetracyanoquinodimethane (TCNQ) anion as a stabilizer and expanded graphite as a starting material, which could provide a facile route to produce high quality water-soluble and organic solvent-soluble graphene sheets for various applications.
Liquid-phase exfoliation, functionalization and applications of grapheneGraphene has attracted intense interest due to its exceptional physical and chemical properties as well as its wide potential applications. The processability and stability of this two-dimensional material in a variety of solvents have been the prerequisites for its functionalization, which will generate more interesting properties for further applications. In this mini review, we present and discuss the current status of liquid-phase exfoliation of graphene from various types of graphite, followed by a topical summarization of recent progress in the functionalization and applications of graphene.
High‐Performance, Stretchable, Wire‐Shaped SupercapacitorsTao Chen, Rui Hao, Huisheng Peng et al.|Angewandte Chemie International Edition|2014 A general approach toward extremely stretchable and highly conductive electrodes was developed. The method involves wrapping a continuous carbon nanotube (CNT) thin film around pre-stretched elastic wires, from which high-performance, stretchable wire-shaped supercapacitors were fabricated. The supercapacitors were made by twisting two such CNT-wrapped elastic wires, pre-coated with poly(vinyl alcohol)/H3PO4 hydrogel, as the electrolyte and separator. The resultant wire-shaped supercapacitors exhibited an extremely high elasticity of up to 350% strain with a high device capacitance up to 30.7 F g(-1), which is two times that of the state-of-the-art stretchable supercapacitor under only 100% strain. The wire-shaped structure facilitated the integration of multiple supercapacitors into a single wire device to meet specific energy and power needs for various potential applications. These supercapacitors can be repeatedly stretched from 0 to 200% strain for hundreds of cycles with no change in performance, thus outperforming all the reported state-of-the-art stretchable electronics.