以比熱實驗探討奈米微粒的量子能隙; The quantum gap discorvy of nanoparticle by specific heat scheme

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/7313

Title:	以比熱實驗探討奈米微粒的量子能隙;The quantum gap discorvy of nanoparticle by specific heat scheme
Authors:	郭佳珊;Jia-Shan Guo
Contributors:	物理研究所
Keywords:	比熱;奈米微粒;specific heat;nanoparticle
Date:	2003-06-20
Issue Date:	2009-09-22 10:55:00 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	1.1nm金奈米微粒因電子能隙太大，小顆粒的比熱貢獻未顯現出來，使得其比熱回歸到費米電子氣。4nm和3.7nm金微粒其離散電子能階組態已在比熱中顯現出來，其電子比熱形式為n=1時Kubo多能階模型。同樣的4.5nm、6nm和9nm鉛奈米微粒其所適用的比熱形式亦為n=1時Kubo多能階模型。且由擬合出的結果可以知道鉛和金由塊材變微粒其聲子密度或聲子速度會增加。由比熱實驗和交流磁化率實驗可以知道當鉛奈米微粒為6nm時，超導能隙可能會有雙能隙產生。且當鉛微粒粒徑變小其超導能隙隨之變小。 Physical property of material will get big changes, when it’s size getting smaller. For example, the form of specific heat of 3.7nm, 4nm Au and 4.5nm, 6nm, 9nmPb nanoparticle can be represented by “Kubo multi-energy level theory” with n=1. Then Debye temperature increases because of density or velocity of phonon add. When size reduce, superconductor gap of Au and Pb nanoparticle get smaller.
Appears in Collections:	[Graduate Institute of Physics] Electronic Thesis & Dissertation

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