可調控鐵磁性的核殼結構奈米顆粒

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

105119044

專利證號

I 567766

專利獲證名稱

可調控鐵磁性的核殼結構奈米顆粒

專利所屬機關 (申請機關)

國立臺灣科技大學

獲證日期

2017/01/21

技術說明

本創作的重點在於將奈米級氧化物製備成核殼結構，並控制製程參數改變殼層厚度，以調變核殼結構中的界面面積，進而控制材料的鐵磁強度。 此種可調控鐵磁性的核殼結構奈米顆粒包括一金屬核以及氧化物殼層。氧化物殼層包覆金屬核，兩者間形成一界面。形成此種核殼結構的奈米顆粒會具有鐵磁性。核殼結構奈米顆粒的鐵磁性隨著比值S/V的提高而增加，其中S為界面的面積，V為氧化物殼層的體積。 實驗結果顯示，樣品的鐵磁強度可經由改變殼層的厚度達成，樣品的飽和磁化強度在殼層厚度降為一半時，可從0.02 emu/g提高至0.03 emu/g。 In this invention, core-shell nanoparticle with tunable ferromagnetism is provided. Saturation magnetization of nano-scaled oxides can be controlled by adjusting the interface area of core-shell structure. The interface area is related to the shell thickness of oxide shell which can be altered by process parameters. The core-shell nanoparticle includes a metallic core and an oxide shell. The metallic core is covered by the oxide shell, wherein the interface is formed between the metallic core and the oxide shell. Nanoparticle with core-shell structure is ferromagnetic. The strength of ferromagnetism is proportional to the S/V ratio, where S is the area of the interface between core and shell and V is the volume of the oxide shell. It is demonstrated clearly that the magnetization of samples can be altered by adjusting the shell thickness. Saturation magnetization was increased from 0.02 emu/g to 0.03 emu/g after reducing the shell thickness from 30 nm to 15 nm.

備註

本部(收文號1100067053)同意該校110年11月3日臺科大研字第1100108149號函申請終止維護專利(台科大)

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