奈米粒子溶液之液滴運動和擴散現象

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Project title/計畫英文名

奈米粒子溶液之液滴運動和擴散現象

Project Number/計畫編號

98-2218-E-002-028-

Translated Name/計畫中文名

奈米粒子溶液之液滴運動和擴散現象

Project Principal Investigator/計畫主持人

YING-CHIH LIAO

Funding Organization

National Science and Technology Council

Start date/計畫起

01-10-2009

Expected Completion/計畫迄

30-09-2010

摘要：由於微機電裝置的需求日益增長，奈米技術已成為許多研究的焦點。其中，為了大規模生產經濟型的電子或醫療微機電裝置，奈米粒子薄膜成為一種不可或缺的技術。在許多薄膜技術之中，drop-on-demand已被證明是生產微機電系統（MEMS）技術中，最有效、靈活、成本低廉的應用工具之一。

在本研究項目中，我們將利用drop-on-demand技術來理解奈米粒子溶液的現象並計劃解決以下問題：
（1）奈米粒子溶液之製備：探討粒子間的作用力，並以界面活性劑或鹽類來穩定墨水組成，以防止顆粒凝結造成噴頭阻塞。
（2）墨水液滴之形成：研究在不同粘度和表面張力的條件下，由噴墨頭產生之墨水液滴大小以及噴墨頭之電壓參數。
（3）液滴與基體之相互影響：研究液滴在接觸固體表面後的大小和形狀。並探討液滴碰撞速度及基體表面紋路對液滴擴散之影響。我們將借由高速攝影配合計算流體力學來解釋液滴碰撞現象，並發展控制噴墨點大小的技術。
（4）油墨乾燥和薄膜形成：探討單個或多個液滴在碰撞基體表面後形成的薄膜圖樣及其乾燥後的薄膜質量。

我們相信本計劃將促進我們對奈米粒子溶液在固體表面上的流動現象之理解。結合配製油墨的知識與drop-on-demand技術亦將有助於加快發展印刷電子及其應用在生物醫學上的腳步。

Abstract: The growing demands for increasingly smaller devices have significantly inspired the recent advancement of nanotechnology. In order to employ nanoparticles in massive and affordable electronic or medical devices, thin film formation from nanoparticles has drawn a lot of attention recently. Among many thin film techniques, drop-on-demand has been proved to be one of the most efficient, flexible, and cost-effective tool to produce micro-electro-mechanical systems (MEMS). In this project, we will make use of drop-on-demand technique to understand the spreading phenomena of nanoparticle dispersion. We plan to address the following problems:

(1) Dispersion of nanoparticles in solvents: investigate the inter-particle forces under various conditions, such as addition of surfactants or salts, to formulate stable ink.

(2) Drop formation with nanoparticle dispersion: investigate the drop size from a nozzle at different ink viscosity and surface tension conditions.

(3) Spreading of particle dispersion on patterned substrate: investigate the dot size and shapes after drop impact to understand the effects of drop shooting speed and substrate topology on the spreading dynamics. With the help of computational fluid dynamics, we hope to create controllable drop splat size and shapes.

(4) Drying and thin film formation of ink: investigate the quality of thin-film patterns formed by single or multiple drop splats.

We believe this project will greatly promote the fundamental understanding of particle flow with free surface. The ink formulation knowledge together with drop on demand technique will also help accelerate the development of printed electronics and bio-medical applications.

Keyword(s)

drop-on-demand
奈米粒子溶液
微機電系統
油墨乾燥和薄膜形成
drop-on-demand
nanoparticle dispersion
MEMS
drying

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奈米粒子溶液之液滴運動和擴散現象

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