填鐵奈米碳管叢感應電流之磁電效應研究

Induced Current of Vertical Aligned Fe-filled Carbon Nanotube Forest by Magnetoelectric Effect

洪瑞聰(Tsung-Jui Hung)

指導教授 ： 張所鋐

國立臺灣大學/工學院/機械工程學研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.01853

摘要

由於奈米碳管之優異的電磁特性和機械性質，近年來受到廣泛的研究及應用，而填鐵奈米碳管即於奈米碳管中空處填入具有鐵磁性之鐵奈米線金屬，大大地提升了其奈米碳管之材料的磁性能，應用前景看好，若以填鐵奈米碳管叢之合成方式，使之所填入的鐵奈米線隨著碳管叢做均勻方向性的排列，將更有效的發揮其電磁特性，目前顯少文獻探討相關於填鐵奈米碳管之電磁特性，故本研究主要探討填鐵碳管叢其電磁相關特性如磁生電、電生磁等，以期實際之應用。

其電磁感應之磁生電的部分，主要以不同參數成長數種高度之填鐵奈米碳管叢，以自製之電磁鐵通以交流電壓進而產生時變的磁場，再於填鐵奈米碳管叢表面上橫向兩側，藉由銅薄片將感應電流導出。磁生電之部分，依據碳管的螺旋電流路徑理論，給予填鐵奈米碳管叢之低頻AC訊號，使之存在電感特性而自發磁場。

實驗結果顯示於時變磁場約35 mT下，以蒸鍍氧化鋁和鐵膜厚所合成之填鐵奈米碳管叢，高度約170 um時可產生感應電流數值約1910 uA左右，而於不繡鋼基板上所成長之填鐵碳碳管其感應電流可提昇至2~3倍左右，提升磁生電的電荷儲存能力以利往後之應用效率。於交流頻率低頻約20 Hz時，填鐵奈米碳管叢之電感特性數值可達3~8 mH，以其自發磁場感應另一填鐵奈米碳管叢，其數值約落於數微安培至數毫安培，可間接輔助證明其碳管螺旋電流路徑之理論。

關鍵字

填鐵奈米碳管叢 ； 電磁特性 ； 螺旋電流路徑 ； 二茂鐵

並列摘要

Becauce Carbon nanotubes with excellent magnetic and mechanical properties , it give rise to widely study and applications in recent years , and the Fe-filled CNT array is to fill iron nanowire of ferromagnetic metal into the hollow center of carbon nanotube, the magnetic behavior of carbon nanotube is enhanced, so the application of future have better than before.The synthesis method of Fe-filled carbon nanotube array, make the Fe-filled nanowire of carbon nanotube vertical aligned along the array, it will enhance the electromagnetic property efficiently. At present, few of reseach study investigate the related electromagnetic property of Fe-filled CNT array, so this study main investigate the electromagnetic property of Fe-filled CNT array like magnetism generate electricity and electricity generate magnetism, etc .Expect to pratical application.

The part of the electromagnetic property with the magnetism generate the electricity, take differenct parameters to grow the Fe-filled CNT array for the numbers of height, input the AC signal to the electromagnet to generate alternate magnetic field. Put the electrode of the Cu foil on the side direction of surface of Fe-filled CNT array, get the induced current by the two side direction of the Cu foil. The other part of the electromagnetic property with the electricity generate the magnetism. On the theory of Electron transport along a chiral trajectory, input AC signal with the low frequency to the Fe-filled CNT array, and it exist the inductance property to generate the magnetic field.
The experiment result show the magnetic field of 35mT, the synthesis of Fe-filled CNT array with evaporate the film, when the height of array is about 170 um, it will generate 1910 uA of the induced current, and the electromagnetic property of Fe-filled CNT array on stainless steel,the induced current can reach 2~3 times, enhance the store of the electricity with the magnetism generate the electricity, to make the better application of future. At the 20 Hz of AC frequency, the inductance of the Fe-filled CNT array can reach 3~8 mH, and the other Fe-filled CNT array induced by the magnetic field of the Fe-filled CNT itself, the number range is between uA to mA, it will speculate the thesis of the electron transport along a chiral trajectory indirectly.

並列關鍵字

the Fe-filled CNT array ； the electromagnetic property ； chiral trajectory ； ferrocene

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