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核壳结构 Fe₃O₄-金-壳聚糖纳米结构的合成与表征。

Synthesis and characterization of core-shell Fe₃O₄-gold-chitosan nanostructure.

机构信息

Department of Civil Engineering, University of Ottawa, Ottawa, ON, K1N 6N5, Canada.

出版信息

J Nanobiotechnology. 2012 Jan 5;10:3. doi: 10.1186/1477-3155-10-3.

DOI:10.1186/1477-3155-10-3
PMID:22221555
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3265409/
Abstract

BACKGROUND: Fe₃O₄-gold-chitosan core-shell nanostructure can be used in biotechnological and biomedical applications such as magnetic bioseparation, water and wastewater treatment, biodetection and bioimaging, drug delivery, and cancer treatment. RESULTS: Magnetite nanoparticles with an average size of 9.8 nm in diameter were synthesized using the chemical co-precipitation method. A gold-coated Fe₃O₄ monotonous core-shell nanostructure was produced with an average size of 15 nm in diameter by glucose reduction of Au³⁺ which is then stabilized with a chitosan cross linked by formaldehyde. The results of analyses with X-ray diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), and Atomic Force Microscopy (AFM) indicated that the nanoparticles were regularly shaped, and agglomerate-free, with a narrow size distribution. CONCLUSIONS: A rapid, mild method for synthesizing Fe₃O₄-gold nanoparticles using chitosan was investigated. A magnetic core-shell-chitosan nanocomposite, including both the supermagnetic properties of iron oxide and the optical characteristics of colloidal gold nanoparticles, was synthesized.

摘要

背景：Fe₃O₄-金-壳聚糖核壳纳米结构可用于生物技术和生物医学应用，如磁生物分离、水和废水处理、生物检测和生物成像、药物输送和癌症治疗。

结果：采用化学共沉淀法合成了平均粒径为 9.8nm 的磁铁矿纳米粒子。通过葡萄糖还原 Au³⁺生成了平均粒径为 15nm 的金包覆的 Fe₃O₄单调核壳纳米结构，然后用甲醛交联壳聚糖稳定。X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）和原子力显微镜（AFM）的分析结果表明，纳米粒子形状规则，无团聚，粒径分布较窄。

结论：研究了一种使用壳聚糖快速温和合成 Fe₃O₄-金纳米粒子的方法。合成了一种包括氧化铁超顺磁性和胶体金纳米粒子光学特性的磁性核壳壳聚糖纳米复合材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/ed2293a01e76/1477-3155-10-3-9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/7bf4a06fc515/1477-3155-10-3-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/2ae96a9adbc7/1477-3155-10-3-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/896f7bd81f0e/1477-3155-10-3-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/31d7dfdf214f/1477-3155-10-3-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/115cd54f0615/1477-3155-10-3-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/f2a35b8f2f53/1477-3155-10-3-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/0dc0ce3307f7/1477-3155-10-3-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/6a716f008348/1477-3155-10-3-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/ed2293a01e76/1477-3155-10-3-9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/7bf4a06fc515/1477-3155-10-3-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/2ae96a9adbc7/1477-3155-10-3-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/896f7bd81f0e/1477-3155-10-3-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/31d7dfdf214f/1477-3155-10-3-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/115cd54f0615/1477-3155-10-3-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/f2a35b8f2f53/1477-3155-10-3-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/0dc0ce3307f7/1477-3155-10-3-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/6a716f008348/1477-3155-10-3-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2217/3265409/ed2293a01e76/1477-3155-10-3-9.jpg

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