奈米材料與技術在生物科技上有廣泛應用的前景,所以本篇論文,希望製備出一種具有磁學性質和光學性質的核殼型式奈米粒子。本研究先是利用化學還原法(Chemical reduction method)製備出具有親水性( Hydrophilic )的FePt奈米粒子;再利用溶膠凝膠法 ( Sol-gel method ) 在低溫下製備出金紅石( Rutile )的TiO2 奈米粒子;最後結合化學還原法和溶膠凝膠法成功地製備出具有親水親油性FePt包覆有結晶性的TiO2之核殼型式( core-shell )奈米粒子。最後將這些樣品分別以X光繞射儀(XRD)、穿透式電子顯微鏡(TEM)、傅粒葉轉換紅外線光譜儀(FTIR)、紫外光/可見光光譜儀(UV/vis)、振動試樣磁力計(VSM)、高周波加熱器(MFH)等儀器鑑定並分析其性質,實驗結果顯示:以 四甘醇(Tetraethylene glycol)所製備出來的FePt 奈米粒子因表面有 -OH、 -COO-M和 -CO-M的官能基訊號,可使FePt 奈米粒子可溶於有機溶劑和水溶液中,且有較大的飽和磁化量,為30.69 emu/g;在低溫下,製備出的金紅石相TiO2 奈米粒子,隨著退火溫度增加到800 ℃,並不會有相變化;最後發現添加不同TiCl4前驅物比例時,觀察到有明顯的單顆FePt@TiO2核殼式奈米粒子,該奈米粒子具有磁學性質,且對紫外光波長產生吸收反應,希望此核殼奈式米粒子在未來可用於奈米生物醫藥材料中。
Nanomaterials and nanotechnologies have widespread applications in biomedical fields. In this research, we intend to acquire the core-shell nanoparticles with the optical and magnetic properties for those needs. Synthesis of FePt/TiO2 nanocomposite was processed through three stages. First, Chemical reduction method was used to prepared hydrophilic FePt nanoparticles. Then using Sol-gel method to obtain the rutile form of TiO2 nanoparticles at low temperature. Finally, a core-shell nanoparticles of hydrophilic and lipophilic FePt coated with TiO2 crystalline coated was successfully acquired by combining both the chemical reduction method and sol-gel method. Characterizations were determined by using X-ray Diffractometer (XRD),Transmission Electron Microscopy (TEM),Fourier transform infrared spectrometer (FTIR),UV/Vis spectrophotometer (UV/vis),Vibrating Sample Magnetometer (VSM),and The high-frequency heater (MFH). The FePt nanoparticles prepared in solvent of tetraethylene glycol, which have -OH,-COO-M and -CO-M signal functional groups, are soluble in organic solvents and aqueous solutions. And the saturation magnetization is 30.69 emu/g. The rutile TiO2 nanoparticles prepared at low temperatures will not have phase transformation at the annealing temperature increased to 800 ℃. Finally, single FePt@TiO2 core-shell nanoparticles were observed under different ratio of TiCl4 precursor which exhibit magnetic properties and reaction to UV wave absorption. This core-shell nanoparticles can be applied to biomedical in the future.
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