材料科学
静电纺丝
正硅酸乙酯
纳米复合材料
化学工程
石英纤维
纤维
发光
纳米颗粒
纳米技术
聚合物
复合材料
光纤激光器
光电子学
工程类
作者
Zhiyao Hou,Chunxia Li,Ping’an Ma,Guogang Li,Ziyong Cheng,Chong Peng,Dongmei Yang,Piaoping Yang,Jun Lin
标识
DOI:10.1002/adfm.201100193
摘要
Abstract Up‐conversion (UC) luminescent porous silica fibers decorated with NaYF 4 :Yb 3+ , Er 3+ nanocrystals (NCs) (denoted as NaYF 4 :Yb 3+ , Er 3+ @silica fiber) are prepared by the electrospinning process using cationic surfactant P123 as a template. Monodisperse and hydrophobic oleic acid capped β‐NaYF 4 : Yb 3+ , Er 3+ NCs are prepared by thermal decomposition methodology. Then, these NCs are transferred into aqueous solution by employing cetyltrimethylammonium bromide (CTAB) as secondary surfactant. The water‐dispersible β‐NaYF 4 :Yb 3+ , Er 3+ NCs are dispersed into precursor electrospinning solution containing P123 and tetraethyl orthosilicate (TEOS), followed by preparation of precursor fibers via electrospinning. Finally, porous α‐NaYF 4 :Yb 3+ , Er 3+ @silica fiber nanocomposites are obtained after annealing the precursor fibers containing β‐NaYF 4 :Yb 3+ , Er 3+ at 550 °C. The as‐prepared α‐NaYF 4 :Yb 3+ , Er 3+ @silica fiber possesses porous structure and UC luminescence properties simultaneously. Furthermore, the obtained nanocomposites can be used as a drug delivery host carrier and drug storage/release properties are investigated, using ibuprofen (IBU) as a model drug. The results indicate that the IBU–loaded α‐NaYF 4 :Yb 3+ , Er 3+ @silica fiber nanocomposites show UC emission of Er 3+ under 980 nm NIR laser excitation and a controlled release property for IBU. Meanwhile, the UC emission intensity of IBU–α‐NaYF 4 :Yb 3+ , Er 3+ @silica fiber system varies with the released amount of IBU.
科研通智能强力驱动
Strongly Powered by AbleSci AI