论文部分内容阅读
利用反相微乳液体系制备出粒径均一的中空氧化硅纳米粒(SHN),以此为基础,再利用水热法通过自组装合成了碳点-中空氧化硅纳米粒复合材料(CD-SHN)。采用高分辨透射电子显微镜(HRTEM)和场发射扫描电子显微镜(FESEM)对其结构进行了表征,结果显示SHN尺寸为30~40 nm,壳厚约为10 nm,在此基础上合成出具有和海葵类似结构的CD-SHN,尺寸约为1μm,并且,在水相中具有良好的分散性。海葵状CD-SHN既具有激发波长依赖的多色荧光发射性能,又具有良好的光稳定性,其最大激发及发射波长分别位于360和435 nm附近,经40 W白炽灯照射60 min,其荧光强度仍可保持97%。该材料的制备过程条件温和,其原材料生物相容性良好,在生物造影方面具有潜在的优势。
Hollow silica nanoparticles (SHN) with uniform particle size were prepared by reverse microemulsion system. Based on this, the carbon-hollow silica nanoparticles (CD-SHN) were synthesized by self-assembly using hydrothermal method ). The structure was characterized by HRTEM and field emission scanning electron microscopy (FESEM). The results show that the SHN size is about 30 nm and the shell thickness is about 10 nm. Based on this, The similar structure of anemone CD-SHN, size of about 1μm, and, in the water phase has good dispersion. The sea anemone-like CD-SHN not only has wavelength-dependent multi-color fluorescence emission but also has good photostability. The maximum excitation and emission wavelengths are around 360 and 435 nm, respectively. After being irradiated with a 40 W incandescent lamp for 60 min, Fluorescent intensity can still maintain 97%. The preparation process of the material is mild, the biocompatibility of the raw material is good, and the biological imaging has the potential advantages.