Rare-earth doped upconversion nanophosphors(UCNPs), which convert low energy near-infrared(NIR) photons into high energy photons such as ultraviolet, visible light and NIR light, have found various applications in opt...Rare-earth doped upconversion nanophosphors(UCNPs), which convert low energy near-infrared(NIR) photons into high energy photons such as ultraviolet, visible light and NIR light, have found various applications in optical bioimaging. In this review article, we summarize recent advances in the synthesis and applications of UCNPs achieved by us and other groups in the past few years. The approaches for the synthesis of UCNPs are presented,with an emphasis on the role of green chemistry in the advancement of this field, followed by a focused overview on their latest applications in optical bioimaging from subcellular structures through cells to living animals. Challenges and opportunities for the use of UCNPs in biomedical diagnosis and therapy are discussed.展开更多
通过共溶剂水热法制备五氧化二钒纳米棒,使用X射线衍射仪(XRD)、扫描电子显微镜(SEM、EDS)、电化学工作站和蓝电测试系统对样品的形貌结构和电化学性能进行分析。结果表明,所得样品均为纯V_2O_5相,结晶度较高;金属离子掺杂后V_2O_5的形...通过共溶剂水热法制备五氧化二钒纳米棒,使用X射线衍射仪(XRD)、扫描电子显微镜(SEM、EDS)、电化学工作站和蓝电测试系统对样品的形貌结构和电化学性能进行分析。结果表明,所得样品均为纯V_2O_5相,结晶度较高;金属离子掺杂后V_2O_5的形貌由棒状变成微球状。CV曲线结果表明,该材料作为锂离子电池正极材料时具有良好的可逆性;掺杂金属铜离子的V_2O_5表现出更好的电化学性能,初始比容量为273.30 m A·h/g,在循环50次后,容量保持率为99.04%;金属铜离子的掺杂可进一步提高材料的电化学性能。展开更多
基金Supported by the National Key Research and Development Program of China(2016YFA0201701/2016YFA0201700)the Beijing Natural Science Foundation(2182051)+2 种基金the National Natural Science Foundation of China(21622601)the Fundamental Research Funds for the Central Universities of China(BUCTRC201601)the "111" project of China(B14004)
文摘Rare-earth doped upconversion nanophosphors(UCNPs), which convert low energy near-infrared(NIR) photons into high energy photons such as ultraviolet, visible light and NIR light, have found various applications in optical bioimaging. In this review article, we summarize recent advances in the synthesis and applications of UCNPs achieved by us and other groups in the past few years. The approaches for the synthesis of UCNPs are presented,with an emphasis on the role of green chemistry in the advancement of this field, followed by a focused overview on their latest applications in optical bioimaging from subcellular structures through cells to living animals. Challenges and opportunities for the use of UCNPs in biomedical diagnosis and therapy are discussed.
文摘通过共溶剂水热法制备五氧化二钒纳米棒,使用X射线衍射仪(XRD)、扫描电子显微镜(SEM、EDS)、电化学工作站和蓝电测试系统对样品的形貌结构和电化学性能进行分析。结果表明,所得样品均为纯V_2O_5相,结晶度较高;金属离子掺杂后V_2O_5的形貌由棒状变成微球状。CV曲线结果表明,该材料作为锂离子电池正极材料时具有良好的可逆性;掺杂金属铜离子的V_2O_5表现出更好的电化学性能,初始比容量为273.30 m A·h/g,在循环50次后,容量保持率为99.04%;金属铜离子的掺杂可进一步提高材料的电化学性能。