基於鈉鉀離子交換波導之光學力推動金奈米球;Optical Propulsion of Gold Nanoparticles Based on Na+-K+ Ion Exchanged Waveguide

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71533

Title:	基於鈉鉀離子交換波導之光學力推動金奈米球;Optical Propulsion of Gold Nanoparticles Based on Na+-K+ Ion Exchanged Waveguide
Authors:	簡仲信;Chien,chung-hsin
Contributors:	光電科學與工程學系
Keywords:	光操控;光推動;DLVO理論;布朗運動;消逝場;金奈米粒子;Optical manipulation;Optical propulsion;DLVO theory;Brownian motion;evanescent field;gold nanoparticles
Date:	2016-07-15
Issue Date:	2016-10-13 13:14:55 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文利用鈉鉀離子交換的技術製作光波導當作光推球基板，並藉由顯微鏡系統研究金奈米粒子受到波導表面消逝場時的運動情形。在理論上模擬金奈米球在波導消逝場上的受力行為，並指出奈米系統下的化學效應對於穩定地捕陷以及推動奈米粒子的重要性。在實驗上我們成功地捕陷並推動二氧化矽微米球超過140微米的距離，然而對於金奈米球而言，雖然其推動和布朗運動相比是明顯的，但是穩定地捕陷以及推動是不成功的。我們將其歸因於波導上方消逝場的侷限性不足，未來使用表面電漿型式的光波導可以大大地改善缺失。;In this study, the propulsion of colloidal gold nanoparticles based on Na+-K+ ion exchange waveguides via the evanescent field was analyzed. Theoretically, the approach to calculate the optical forces exerted on nanoparticles was reviewed. Of particularly interest, we point out the importance where the chemistry of the nanoscale environment should be specially tailored in order to achieve trapping and transport of nanoparticles with high stability. Experimentally, we demonstrate the propulsion of silica micrometer-sized spheres along the optical waveguide over a length of 140μm. On the contrary, although the movement of gold nanoparticles against brownian motion was obvious, stable trapping and transport was not successful. We attribute the result to relatively weak gradient forces which can be further improved utilizing surface plasmon polariton waveguides.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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