CAJ | 학술논문

利用St(o)ber法和交联法制备出具有荧光和磁性功能的Fe3O4/SiO2/CMCH/CdTe微球,并对其性能和应用效果进行了分析讨论.首先以正硅酸四乙酯为前躯体,Fe2+和Fe3+物质的量的比为1∶2,利用超临界干燥法制备出了Fe3O4/SiO2复合微球;并通过透射电镜对其进行观察,Fe3O4颗粒粒径为10 nm,SiO2层厚度为5 nm;其次羧甲基化的壳聚糖(CMCH)被嫁接在Fe3O4/SiO2表面上;然后利用水热法制备出CdTe荧光颗粒,通过壳聚糖与CdTe之间的静电吸引作用,CdTe被吸附在壳聚糖表面;最后利用戊二醛对壳聚糖的选择性交联作用制备出粒径在200 nm以内,饱和磁化强度为22.16 A·m2/kg,且具有良好荧光性能的Fe3O4/SiO2/CMCH/CdTe微球.荧光光谱分析表明最大发射波长从519 nm红移到528 nm,也证实了荧光颗粒CdTe成功吸附在Fe3O4/SiO2/CMCH表面.在动物实验中,该复合微球也显示出良好的荧光性、磁性及稳定性.
이용St(o)ber법화교련법제비출구유형광화자성공능적Fe3O4/SiO2/CMCH/CdTe미구,병대기성능화응용효과진행료분석토론.수선이정규산사을지위전구체,Fe2+화Fe3+물질적량적비위1∶2,이용초림계간조법제비출료Fe3O4/SiO2복합미구;병통과투사전경대기진행관찰,Fe3O4과립립경위10 nm,SiO2층후도위5 nm;기차최갑기화적각취당(CMCH)피가접재Fe3O4/SiO2표면상;연후이용수열법제비출CdTe형광과립,통과각취당여CdTe지간적정전흡인작용,CdTe피흡부재각취당표면;최후이용무이철대각취당적선택성교련작용제비출립경재200 nm이내,포화자화강도위22.16 A·m2/kg,차구유량호형광성능적Fe3O4/SiO2/CMCH/CdTe미구.형광광보분석표명최대발사파장종519 nm홍이도528 nm,야증실료형광과립CdTe성공흡부재Fe3O4/SiO2/CMCH표면.재동물실험중,해복합미구야현시출량호적형광성、자성급은정성.
Fluorescent/magnetic Fe3O4/SiO2/ carboxymethylated chitosan(CMCH)/CdTe properties and applications were analyzed and discussed. First, silica-coated Fe3O4 composite microspheres with tetraethoxysilane(TEOS) as precursor, and mol Observation with transmission electron microscopy(TEM) shared that the average diameter of the Fe3 O4particals was 10 nm and the thickness of SiO2 layer was 5 nm. Then, the CMCH was connected onto the surface of Fe3O4/SiO2. CdTe fluorescent particles were prepared with hydrothermal approach, and adsorbed on the chains of CMCH by the electrostatic interaction between CMCH and CdTe. Finally, Fe3O4/SiO2/CMCH/CdTe particles with the diameter less than 200 nm, properties were obtained via selective crosslinking of glutaraldehyde with CMCH. The fluorescence spectrum data indicate that the maximum emission wavelength red shifts from 519 nm to 528 nm, which validates the adsorption of CdTe on the surface of Fe3O4/SiO2/CMCH. Animal experiment also verifies the excellent fluorescence, magnetism and stability of the composite microspheres.