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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張嘉升(Chia-Seng Chang) | |
| dc.contributor.author | Yi-Ru Chang | en |
| dc.contributor.author | 張毅儒 | zh_TW |
| dc.date.accessioned | 2021-06-13T00:02:15Z | - |
| dc.date.available | 2007-07-31 | |
| dc.date.copyright | 2007-07-31 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-30 | |
| dc.identifier.citation | Reference
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28181 | - |
| dc.description.abstract | 利用在Si(111)-Pb表面成長的鉛量子島的模板，二維的奈米銀團簇可以自組織機制成功的形成。奈米銀團簇不但以平面方式成形,更發展可區別的大小及形狀。這些具有強化穩定性的奈米銀團簇被命名為”奇異奈米銀結構”。在目前的工作裡，我們藉由掃描穿隧顯微鏡探討奈米銀結構的熱穩定性，其熱穩定性將以緩慢升溫的模式有系統地被驗證。再者，”奇異奈米銀結構”彼此間的相對穩定性也將被檢驗。此外，奈米銀結構的鄰近效應對其穩定性的影響也是我們感興趣的主題，為了明瞭周圍環境的效應，我們選擇兩種不同鍍量的銀鍍在鉛量子島上， | zh_TW |
| dc.description.abstract | Utilizing the pattern found on the Pb quantum islands formed above Si(111)–Pb surfaces, two-dimensional Ag nanoclusters can be successfully grown via the self-organized mechanism. Not only are Ag nanoclusters in the planar formed, but also naturally develop into distinct sizes and shapes. Those nanoclusters with enhanced stability are named magic Ag nanopucks. In the present work, scanning tunneling microscopy (STM) is employed to study the thermal stability strength of Ag nanopucks. By slowly raising the sample temperature, the physical stability is systematically demonstrated. Furthermore, the relative stability of magic Ag nanoclusters is also examined. In addition, the surrounding effect on the stability is also of our interest in the present work. For the purpose of realizing this effect, two different deposition coverage were chosen to deposit onto Pb quantum islands. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T00:02:15Z (GMT). No. of bitstreams: 1 ntu-96-R94222061-1.pdf: 2605119 bytes, checksum: 6668c827e09896556fca79294c72a910 (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | Table of Contents
Abstract Acknowledgements Table of Contents List of Figures Chapter 1. Introduction--------------------------------1 Chapter 2. Principle of scanning tunneling microscopy--5 2.1 Tunneling theory-----------------------------------6 2.2 Local density of states--------------------------- 7 2.3 STM operating modes-------------------------------10 2.3.1 Constant current modes--------------------------12 2.3.2 Constant height modes---------------------------13 2.3.3 Current image tunneling spectroscopy (CITS)-----15 Chapter 3. Experimental details-----------------------17 3.1 Experimental systems------------------------------17 3.1.1 UHV system--------------------------------------19 3.1.2 STM system--------------------------------------23 3.1.3 Evaporator system-------------------------------27 3.1.4 Vibration isolation-----------------------------29 3.2 Tip preparation-----------------------------------31 3.3 Sample preparation--------------------------------32 Chapter4. The thermal stability of the 2D Ag nanoclusters on Pb quantum islands----------34 4.1 Motivation----------------------------------------34 4.2 Experimental procedures---------------------------37 4.3 Results and discussions---------------------------40 4.3.1 Temperature dependence of magic Ag nanopucks on the thermal stability---------------------------40 4.3.2 Surrounding effect on the thermal stability of 2D Ag nanopucks---------------------------------48 4.4 Conclusion----------------------------------------53 References | |
| dc.language.iso | en | |
| dc.subject | 奈米結構 | zh_TW |
| dc.subject | 掃描穿隧顯微鏡 | zh_TW |
| dc.subject | 鉛量子島 | zh_TW |
| dc.subject | 幾何穩定性 | zh_TW |
| dc.subject | 電性穩定性 | zh_TW |
| dc.subject | STM | en |
| dc.subject | Electronic stability | en |
| dc.subject | Geometrical stability | en |
| dc.subject | Pb quantum island | en |
| dc.subject | Nanocluster | en |
| dc.title | 二維奈米銀結構在鉛量子島上之熱穩定性 | zh_TW |
| dc.title | Thermal Stability of the Two-Dimensional Ag
Nanopucks on Pb Quantum Islands | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.coadvisor | 陳永芳(Yang-Fang Chen) | |
| dc.contributor.oralexamcommittee | 邱雅萍(Ya-Ping Chiu),蘇維彬(Wei-Bin Su) | |
| dc.subject.keyword | 掃描穿隧顯微鏡,奈米結構,鉛量子島,幾何穩定性,電性穩定性, | zh_TW |
| dc.subject.keyword | STM,Nanocluster,Pb quantum island,Geometrical stability,Electronic stability, | en |
| dc.relation.page | 53 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-31 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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