https://scholars.lib.ntu.edu.tw/handle/123456789/32006
DC 欄位 | 值 | 語言 |
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dc.contributor | 林敏聰 | en |
dc.contributor | 臺灣大學:物理研究所 | zh_TW |
dc.contributor.author | 黃伯群 | zh |
dc.contributor.author | Huang, Po-Chung | en |
dc.creator | 黃伯群 | zh |
dc.creator | Huang, Po-Chung | en |
dc.date | 2005 | en |
dc.date.accessioned | 2007-11-26T09:20:47Z | - |
dc.date.accessioned | 2018-06-28T09:38:53Z | - |
dc.date.available | 2007-11-26T09:20:47Z | - |
dc.date.available | 2018-06-28T09:38:53Z | - |
dc.date.issued | 2005 | - |
dc.identifier | zh-TW | en |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/54528 | - |
dc.description.abstract | 我們將金屬原子蒸鍍在氧化鋁/鎳鋁合金(100)基板上,成功製作出具有以下優點的金屬奈米顆粒:有序的排列、均勻的體積分佈以及高熱穩定度。而這些優點歸因於氧化鋁層表面產生獨特的週期性一維長條結構,其間距約4 nm。我們分別在低溫、室溫及高溫下成長金屬奈米顆粒藉以比較其有序性的不同。此外,我們改變不同的原子覆蓋量來研究其熱穩定度與磁性行為。這個新穎的奈米結構材料或許能為各式各樣的應用打開大門,例如:更有效的催化劑、更高的資料儲存密度…等,而製作出大面積有序排列的奈米顆粒是這些應用的重要條件之一。 | zh_TW |
dc.description.abstract | We present metal nanoparticle grown by vapor deposition over a single-crystalline Al2O3 layers on NiAl(100) with excellences including: well-ordered alignment, uniform size distribution, and high thermal stability. We attribute the excellences to peculiar one-dimensional long stripes with ~ 4 nm interdistance on the surface of the ultrathin Al2O3 template. For the comparism, low temperature, room temperature and high temperature growth of nanoparticles are performed. Besides, the thermal stability and the magnetic properties with respect to different deposition amount are also characterized. This novel nanostructure may open the door to numerous applications, such as catalysis and nanostorage, where large area well-ordered nanoparticles are desired. | en |
dc.description.tableofcontents | 致謝 1 摘要 2 Abstract 3 1 簡介 6 2 基礎概念 10 2.1 古典成核理論 (The Classical Theory of Nucleation)10 2.2 量子尺度效應 (Quantum Size Effect)……………….16 2.3 磁滯曲線 (Magnetic Hysteresis Loop)………………17 2.4 居禮溫度 (Currie Temperature)………………………18 3 實驗方法和原理 21 3.1 多功能超高真空系統...........…………………………..23 3.2 加熱系統與氧化........................................................27 3.2.1 加熱系統與溫度量..............................................27 3.2.2 氧化....................................................................28 3.3 分子束磊晶 (MBE)………………………………….....29 3.4 薄膜生長分:析中能量電子繞射 (MEED)..................29 3.5 表面分析原理和儀器......………………………….......32 3.5.1 晶格平面結構:低能量電子繞射投影(LEED).......32 3.5.2 晶格垂直結構:強度/能量曲線圖 (I/V-LEED)…35 3.5.3 表面元素分析:歐傑電子能譜儀 (AES)…………37 3.5.4 掃描式穿隧電流顯微儀 (Scanning Tunneling Microscope)………………………………………40 3.6 磁性量測:磁光柯爾效應 (MOKE)……………………47 4 實驗結果分析與討論 51 4.1 原子覆蓋量校正........................................................51 4.2 表面分析...................................................................55 4.2.1 氧化鋁層的低能量電子繞射圖像(LEED).............55 4.2.2 鈷奈米顆粒隨覆蓋量的變化................................58 4.2.3 鈷奈米顆粒的成長溫度效應................................63 4.2.4 鈷奈米顆粒的升溫效應.......................................67 4.3 磁性分析...................................................................74 4.3.1 鈷奈米顆粒的磁滯曲線與覆蓋銅效應.................74 4.3.2 錳奈米顆粒的磁滯曲線.......................................79 5 討論 81 5.1 θ相-氧化鋁的結構…………………………………….81 5.2 鈷奈米顆粒特殊的直徑分佈…………………………..83 5.3 氧化鋁缺陷的隆起與奈米顆粒的有序性……………..83 6 結論 86 參考資料 88 | zh_TW |
dc.format.extent | 4144955 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | zh-TW | en |
dc.language.iso | en_US | - |
dc.subject | 鈷 | en |
dc.subject | 錳 | en |
dc.subject | 金屬 | en |
dc.subject | 奈米顆粒 | en |
dc.subject | 奈米團簇 | en |
dc.subject | 奈米磁學 | en |
dc.subject | 磁性 | en |
dc.subject | 有序 | en |
dc.subject | 氧化鋁 | en |
dc.subject | 鎳鋁 | en |
dc.subject | 成長 | en |
dc.subject | 熱穩定度 | en |
dc.subject | Co | en |
dc.subject | Mn | en |
dc.subject | metal | en |
dc.subject | nano particle | en |
dc.subject | nano cluster | en |
dc.subject | nano magnetism | en |
dc.subject | ordering | en |
dc.subject | align | en |
dc.subject | aluminum | en |
dc.subject | NiAl | en |
dc.subject | growth | en |
dc.subject | thermal stability | en |
dc.title | 自發有序排列之金屬奈米顆粒的成長、熱穩定度與磁性研究 | zh |
dc.title | Growth, Thermal Stability and Magnetism of Self-Aligned Metal Nanoparticles | en |
dc.type | thesis | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/54528/1/ntu-94-R92222028-1.pdf | - |
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item.languageiso639-1 | en_US | - |
item.cerifentitytype | Publications | - |
item.fulltext | with fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.openairetype | thesis | - |
item.grantfulltext | open | - |
顯示於: | 物理學系 |
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ntu-94-R92222028-1.pdf | 23.53 kB | Adobe PDF | 檢視/開啟 |
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