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DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 蔡定平(Din Ping Tsai) | |
dc.contributor.author | Cheng-Kuei Liu | en |
dc.contributor.author | 劉政揆 | zh_TW |
dc.date.accessioned | 2021-06-08T04:44:09Z | - |
dc.date.copyright | 2009-08-19 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-08-04 | |
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Chemical Physics Letters, 2001. 345(1-2): p. 195-200. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/23144 | - |
dc.description.abstract | 在如今大量運用奈米科技於生物物理研究的同時,我們對水在奈米尺度侷限的介電行為產生了興趣。我們認為水在奈米侷限下的行為會和在大體積時有極大的不同。許多相關的模擬研究成果已經發表,然而有些認為其介電會較大體積時為大,有些則認為會較大體積時為小,相關的研究並沒有一致的結果而仍有爭議,而研究水在奈米流道介電行為的實驗也非常少。也因此,我們希望能夠對於水在奈米尺度侷限下的介電係數作直接的測量,對此一仍不清楚而有待研究的議題能夠提出直接可信的實驗數據。進而可藉此數據,探討水分子在奈米侷限下的行為和動力學。在應用方面,發展出可提供測量奈米流道下各種溶液介電行為的可靠裝置。
本研究選擇以微製程的方式,利用金和銦錫氧化薄膜(ITO)等材料製作電極,並利用光阻來製作流道,再利用奈米微壓印機來封裝裝置,製造出尺度最小為100nm的微流道測量裝置,配合阻抗分析儀來測量水的介電常數。本實驗製做了各個不同尺度微流道的裝置,不同尺度下的裝置對於水的測量結果和已知的量測結果有著穩定的一致,也因此說明本實驗自行製作的裝置和所提供的量測結果是可靠的。 至於誤差分析分面也被小心的估算及處理。本實驗利用各種模擬分析方法估算可能所引入的誤差,並且對這些誤差作了適當的排除及處理。 根據本實驗目前實驗的結果,直到100nm 水的介電行為和在大體積時沒有太大的差異。 | zh_TW |
dc.description.abstract | The dielectric property of water in nanoscale confinement is not well studied, due to the lack of direct measurement of the dielectric constant of water in such an environment. Many simulations of the dielectric constant of water in the DC case have been reported with indications that the dielectric constant of water will be smaller in a confined environment, though others propose dielectric constant will be larger, than that in the bulk limit. This issue remains controversial and awaits more experimental investigations. Our goal is to directly measure the dielectric constant of water in quasi-2D confined nanoslits through fabricated fluidic devices. We employed patterned photoresist to fabricate the fluidic channel with electrodes, and bonding is done using nanoimprint. We use an impedance analyzer to perform the measurement, which can provide the precise capacitance of the sample in low frequency range, and the parallel capacitance model is used to transfer the capacitance to the dielectric constant. So far, my work has been down to 100nm. It still shows no discrepancy with the bulk water. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T04:44:09Z (GMT). No. of bitstreams: 1 ntu-98-R96222065-1.pdf: 104252717 bytes, checksum: 9b5d02f623686570cd7ec59b2fff73cf (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | 口試委員會審定書………………………………………………………i
中文摘要 ………………………………………………………………ii 英文摘要………………………………………………………………iii 一 文獻回顧及原理概述………………………………………………1 1.1 微觀下物質交流電場下的介電行為以及Debye模型……1 1.2 巨觀上物質在交流電場下之行為…………………………4 1.3 大體積水的介電常數………………………………………7 1.4 水在奈米侷限中介電行為的理論預測……………………9 二 實驗原理及實驗設計………………………………………………10 2.1實驗動機………………………………………………………10 2.2實驗方法的選擇………………………………………………11 2.3實驗原理………………………………………………………12 2.4實驗配置………………………………………………………13 2.5 實驗設計……………………………………………………..15 2.5.1電極距離測定問題……………………………………15 2.5.2電容轉換至介電常數問題……………………………16 2.5.3氣泡問題 …………………………………………….23 2.5.4強電場效應……………………………………………25 三 裝置製程與設計…………………………………………………26 3.1 裝置簡介…………………………………………………26 3.2 裝置製程設計……………………………………………27 3.2.1 流道成形方式選擇………………………………27 3.2.2 流道封裝材料選擇………………………………28 3.2.3 流道封裝製做……………………………………30 3.2.3.1製程一 以樣品注入孔來進行顯影……30 3.2.3.2製程二 從裝置側邊的測孔顯影………32 3.2.3.3 製程三 以顯影後光阻進行壓印封裝…33 3.2.3.4 製程四 同時壓印顯影及未顯影光阻…34 3.2.3.5 製程五 壓印玻璃以及顯影過後光阻…35 3.2.3.6 流道製做討論 …………………………36 3.4 控制流道高度 ……………………………………………38 3.5 流道高寬比 ………………………………………………39 3.6 電極大小 …………………………………………………40 3.7 奈米壓印封裝 ……………………………………………40 3.7.1 壓印溫度選擇……………………………………40 3.7.2 壓印系統設計與配置……………………………41 四 實驗流程與步驟…………………………………………………44 4.1 實驗儀器簡介…………………………………………………44 4.2 電極製做………………………………………………………46 4.2.1 藥品及材料 …………………………………………46 4.2.2 金電極製做 …………………………………………46 4.2.3 ITO電極製做…………………………………………48 4.2.4 鉻支稱柱製做…………………………………………48 4.3 裝置封裝………………………………………………………51 4.4 量測程序………………………………………………………52 4.4.1 機台介紹與原理 ………………………………………52 4.4.2 量測頻率選擇 …………………………………………52 4.4.3 量測電壓差選擇 ………………………………………53 4.4.4 機器校準 ………………………………………………53 4.4.5 量測步驟 ………………………………………………54 4.4.5.1 量測空氣 ……………………………………54 4.4.5.2 量測水 ………………………………………55 五 實驗結果與討論……………………………………………………56 5.1 實驗一 不同的電極大小之介電常數測量 …………………56 5.2 實驗二 不同的量測時間之介電常數測量 …………………58 5.3 實驗三 不同的流道高度之介電常數測量 …………………59 5.4 實驗誤差討論…………………………………………………60 5.5 實驗結果討論…………………………………………………63 六 結論…………………………………………………………………64 參考文獻 ………………………………………………………………65 | |
dc.language.iso | zh-TW | |
dc.title | 探討奈米流道內水之介電性質 | zh_TW |
dc.title | A Study on Dielectric Behavior of Water in Microfluidic Channel | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 周家復(Chia-Fu Chou) | |
dc.contributor.oralexamcommittee | 梁培德(Pui Tak Leung),陳至信 | |
dc.subject.keyword | 微流體,水,介電常數, | zh_TW |
dc.subject.keyword | microfluidic channel,water,dielectric constant, | en |
dc.relation.page | 68 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2009-08-04 | |
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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