本篇論文的研究目的是利用鐵離子佈植方法製備磁性奈米鑽石。現今奈米材料有許多在醫療診斷和癌症治療上之研究，奈米材料的生物相容性和生物毒性是影響奈米材料於生醫應用之限制因素。因此，找出一種能夠解決目前奈米材料在生物醫學應用上所面臨的問題，是有其必要性及迫切性。

本研究使用的奈米材料為Ib型無生物毒性的奈米鑽石，鐵離子佈植的劑量分別是1×1015 ions/cm2, 3×1015 ions/cm2, 5×1015 ions/cm2 。在鐵離子佈植的過程中，鑽石的晶格結構可能會遭到破壞，為了確保經過鐵離子佈植的奈米鑽石仍具完整鑽石結構，所以對鐵離子佈植後的奈米鑽石進行熱處理，退火的溫度條件為800 ℃ 和 600 ℃，拉曼光譜結果顯示退火後的奈米鑽石，石墨的G-band消失且鑽石峰值強度增強。進一步，對含鐵奈米鑽石進行物理性質鑑定，透過高解析度穿透式電子顯微鏡，可看見磁性奈米鑽石擁有完整鑽石單晶結構；由X光能量分散光譜可以檢視材料元素成分，最後使用超導量子干涉震動磁量儀測量含鐵奈米的磁化曲線，從結果為磁滯曲線，可以說明含鐵奈米鑽石屬於鐵磁性。

最終結果顯示含鐵奈米鑽石的表面結構仍然完整且與奈米鑽石一致，此外還具有磁性，所以理論上，本研究所製備出的磁性奈米鑽石也是不具生物毒性和具良好生物相容性。

The purpose of this study was to fabricate magnetic nanodiamonds (NDs) using Fe ion implantation. Nanomaterials are being applied to medical diagnosis study and cancer therapy study. Biocompatibility and biological toxicity have been limiting factors as regarding medical application. Thus it would be desirable to find a new method which can resolve these problems.

The NDs, a promising non-toxic material, used in this study was type Ib. They were implanted using 72 keV Fe ions at three different dosage. The process of ion implantation probably damages the crystal lattice of NDs. In order to keep completely crystal lattice of Fe ion doped NDs, this study used thermal annealing process at 800 ℃ and 600 ℃. The Raman spectrum showed that annealing process truly recovered the crystal lattice of NDs. The G-band of graphite disappeared and the intensity of diamond peak increased after annealing. The microstructure of Fe ion doped NDs were examined by High Resolution Transmission Electron Microscopy (HRTEM) and these images demonstrated that no defects were found in Fe ion doped NDs. Further, the content of elements in Fe doped NDs can be identified by Energy dispersive X-ray Spectroscopy (EDX) and the quantification of magnetic force can be measured by Superconducting Quantum Interference Device Vibrating Sample Magnetometer (SQUID VSM). The hysteresis loop indicated that this study successfully produced ferromagnetic NDs.

The totally final results displayed Fe doped NDs possess same crystal lattice as NDs and magnetism. Theoretically, these magnetic NDs are also a promising non-toxic and good biocompatibility material.

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