Construction of functional porous titanium scaffold is drawing ever growing attention, due to its effectiveness in solving the mechanical mismatch between titanium implant and bone tissue. However, the poor water perm...Construction of functional porous titanium scaffold is drawing ever growing attention, due to its effectiveness in solving the mechanical mismatch between titanium implant and bone tissue. However, the poor water permeability as well as the problem in achieving uniform surface modification inside scaffold hinders the further biomedical application of porous titanium scaffold. In this study, largescale functional Ti O2 nanostructures（nanonetwork, nanoplate and nanowire） were constructed on three-dimensional porous titanium scaffolds surface via an effective hydrothermal treatment method. These nanostructures increase the hydrophilicity of the titanium scaffold surface, facilitating the cell culture medium to penetrate into the inner pore of the scaffold. Zeta potential analyses indicate that the surface electrical properties depend on the nanostructure, with nanowire exhibiting the lowest potential at p H 7.4. The influence of the nano-functionalized scaffold on protein adsorption and cell adhesion was examined. The results indicate that the nano-functionalized surface could modulate protein adsorption and bone marrow derived mesenchymal stem cells（BMSCs） adhesion, with the nanowire functionalized porous scaffold homogeneously promoting protein adsorption and BMSCs adhesion. Our research will facilitate future research on the development of novel functional porous scaffold.展开更多
Novel hierarchical carbon nanocages （hCNCs） are proposed as high-rate anodes for Li- and Na-ion batteries. The unique structure of the porous network for hCNCs greatly favors electrolyte penetration, ion diffusion, ...Novel hierarchical carbon nanocages （hCNCs） are proposed as high-rate anodes for Li- and Na-ion batteries. The unique structure of the porous network for hCNCs greatly favors electrolyte penetration, ion diffusion, electron conduction, and structural stability, resulting in high rate capability and excellent cyclability. For lithium storage, the corresponding electrode stores a steady reversible capacity of 970 mAh·g^-1 at a rate of 0.1 A·g^-1 after 10 cycles, and stabilizes at 229 mAh·g^-1 after 10,000 cycles at a high rate of 25 A·g^-1（33 s for full-charging） while delivering a large specific power of 37 kW·kgelectrode^-1 and specific energy of 339 Wh·kgelectrode^-1. For sodium storage, the hCNC reaches a high discharge capacity of -50 mAh·g^-1 even at a high rate of 10 A·g^-1.展开更多
基金supported by the National High Technology Research and Development Program of China(2015AA033502)the National Natural Science Foundation of China(51372087,51232002 and 51541201)+3 种基金the Science and Technology Planning Project of Guangdong Province,China(2014A010105048)the Natural Science Foundation of Guangdong Province(2015A030313493 and 2016A030308014)the State Key Laboratory for Mechanical Behavior of Materials,China(20141607)the Technological Projects of Guangzhou,China(201604020110)
文摘Construction of functional porous titanium scaffold is drawing ever growing attention, due to its effectiveness in solving the mechanical mismatch between titanium implant and bone tissue. However, the poor water permeability as well as the problem in achieving uniform surface modification inside scaffold hinders the further biomedical application of porous titanium scaffold. In this study, largescale functional Ti O2 nanostructures（nanonetwork, nanoplate and nanowire） were constructed on three-dimensional porous titanium scaffolds surface via an effective hydrothermal treatment method. These nanostructures increase the hydrophilicity of the titanium scaffold surface, facilitating the cell culture medium to penetrate into the inner pore of the scaffold. Zeta potential analyses indicate that the surface electrical properties depend on the nanostructure, with nanowire exhibiting the lowest potential at p H 7.4. The influence of the nano-functionalized scaffold on protein adsorption and cell adhesion was examined. The results indicate that the nano-functionalized surface could modulate protein adsorption and bone marrow derived mesenchymal stem cells（BMSCs） adhesion, with the nanowire functionalized porous scaffold homogeneously promoting protein adsorption and BMSCs adhesion. Our research will facilitate future research on the development of novel functional porous scaffold.
基金Acknowledgements This work was jointly supported by the National Natural Science Foundation of China （Nos. 21473089, 51232003, 21373108, 21173115, and 21203092）, the National Basic Research Program of China （No. 2013CB932902）, Suzhou Program （No. ZXG2013025） and Changzhou Technology Support Program （No. CE20130032）.
文摘Novel hierarchical carbon nanocages （hCNCs） are proposed as high-rate anodes for Li- and Na-ion batteries. The unique structure of the porous network for hCNCs greatly favors electrolyte penetration, ion diffusion, electron conduction, and structural stability, resulting in high rate capability and excellent cyclability. For lithium storage, the corresponding electrode stores a steady reversible capacity of 970 mAh·g^-1 at a rate of 0.1 A·g^-1 after 10 cycles, and stabilizes at 229 mAh·g^-1 after 10,000 cycles at a high rate of 25 A·g^-1（33 s for full-charging） while delivering a large specific power of 37 kW·kgelectrode^-1 and specific energy of 339 Wh·kgelectrode^-1. For sodium storage, the hCNC reaches a high discharge capacity of -50 mAh·g^-1 even at a high rate of 10 A·g^-1.
