零維銦奈米微粒的超導熱效應; Specific heat and superconducting behavior of zero dimension Indium nanoparticle

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/7348

Title:	零維銦奈米微粒的超導熱效應;Specific heat and superconducting behavior of zero dimension Indium nanoparticle
Authors:	洪尚德;Shang-De Hong
Contributors:	物理研究所
Keywords:	銦;奈米粒子;比熱;量子效應;能隙;Indium;nanoparticle;specific heat;quantum size effect;energy gap
Date:	2004-06-25
Issue Date:	2009-09-22 10:55:57 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本實驗由熱蒸鍍機蒸鍍出三組奈米微粒，分別為5nm、8nm及12nm，並使用物理量測系統量測其比熱，將實驗得到的比熱值除以正常態比熱，溫度除以臨界溫度，將三組奈米微粒與約化溫度隨外加磁場的變化與塊材比較；用理論公式擬合後發現，平均電子能隙會隨磁場的增加而減小，也會隨粒徑的增加而趨近於零；而由可得到電子能隙，一樣會隨粒徑的增加而趨近於零。證明了粒徑越接近塊材，原子數目增多，導電電子數目跟著增加，使得費米能階附近的電子能階由分裂的能階進入連續的能階，所以電子能階才會趨近於零，此為量子效應的顯現。 Three sets of Indium nanoparticle powders were fabricated by employing the gas-condensation method。We were measured the specific heat by using the “Physical property measurement system。According to theory，we can obtained the average single-electron level spacing with increasing magnetic applied field，the value of average single-electron level spacing is decreased。Form the formula，we obtain single-electron level spacing。It’s same with the average single electron level spacing，when the increasing magnetic applied field，the value was decreased。This is quantum size effect let single-electron level spacing decreased。
Appears in Collections:	[Graduate Institute of Physics] Electronic Thesis & Dissertation

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