Name: fabrication and visualization of capillary bridges in slit pore geometry
Uploaded: 2014-01-09T13:45:00
Description: Watch this Scientific Journal Video about Fabrication and Visualization of Capillary Bridges in Slit Pore Geometry at JoVE.com

作者感谢国家科学基金会在"第1号赠款"下给予的支持。CMMI-00748094和 ONR N000141110629。

协议文本分为三个主要部分：1） PDMS （聚二甲基硅氧烷） 柱子的制造，2） 柱子顶部的功能化，以及毛细管桥的形成和特征。
1. PDMS 支柱的制造
本节详细介绍了使用硅/SU-8模具压铸的 PDMS 柱子的制造。
<ol><li>
硅/SU-8模具的制造
	<ol>
<li>将干净的 4 在硅晶圆中放在皮雷克斯培养皿中。</li>
		<li>在单独的烧嘴中将硫酸与过氧化氢（食人鱼）溶液?...

<ol>
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这里介绍的方法提供了在狭缝孔几何中创建毛细金桥的方法，也是成像这些桥梁的方法，以便分析它们的形态，并将其与模拟和理论进行比较。
该方法结合了物理缓解和选择性化学模式，以创建不对称的润湿特性。如果只存在化学异质性，液体滴将保持在异质性上，直到接触角度超过湿度较低的（低表面能量）区域。当 PDMS 是低表面能量区域时，亲水/疏水边界的最大可实现?...

毛细细桥的形状和产生的力的研究一直是广泛研究的主题2-7。最初，由于其简单性，大多数努力都集中在轴对称毛细桥上。毛细管桥通常发生在自然系统中，例如在颗粒和多孔介质8，9中发现的桥和用于技术应用的桥梁，例如用于翻转芯片技术10-15 的毛细管自组装，与交互表面的非单位式润湿特性不对称。改进的平版印刷技术与简单数值工具的可访问性相结合，可模拟流体接口，从而能够创建和建模日益复杂的毛细细桥。
狭缝孔几何中的毛细管桥提供了一个有趣的妥协：定向润湿特性导致非轴对称桥保留一些对称平面（这简化了分析）。它们作为多孔介质的案例研究，在理论和数字上进行了研究。然而，对狭缝孔几何毛细金桥的系统实验研究受到限制。在这里，我们介绍了一种方法，以创建和描述毛细孔几何毛细桥。简言之，该方法包括1）制造柱子以产生化学和物理异质性;2） 设计微舞台对齐和操纵桥梁;3） 从正面或两侧对毛细管桥进行成像，以描述其形态。桥梁形态的特征，以及表面进化器模拟的比较，在一个单独的出版物1提供。

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			<td height="43" style="height:43px;width:167px;">99.999% Gold wire</td>
			<td style="width:84px;">Kurt J. Lesker</td>
			<td style="width:91px;">EVMAU40040</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Acetone</td>
			<td style="width:84px;">Pharmco-AAPER</td>
			<td style="width:91px;">C1107283</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:167px;">Dimethyl sulfoxide</td>
			<td style="width:84px;">Fisher</td>
			<td style="width:91px;">D128-500</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Ethanol (200 proof)</td>
			<td style="width:84px;">Pharmco-AAPER</td>
			<td style="width:91px;">111000200</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Hydrochloric acid</td>
			<td style="width:84px;">EMD</td>
			<td style="width:91px;">HX0603-4</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Hydrogen peroxide (30%)</td>
			<td style="width:84px;">EMD</td>
			<td style="width:91px;">HX0635-3</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Isopropyl alcohol</td>
			<td style="width:84px;">Fisher</td>
			<td style="width:91px;">L-13597</td>
			<td style="width:84px;"></td>
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		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Mercapto hexadecanoic acid (90%)</td>
			<td style="width:84px;">Sigma-Aldrich</td>
			<td style="width:91px;">448303-1G</td>
			<td style="width:84px;"></td>
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		<tr height="64">
			<td height="64" style="height:64px;width:167px;">Mercapto-propyl-trimethoxy-silane (MPTS)</td>
			<td style="width:84px;">Gelest</td>
			<td style="width:91px;">Sim6476-O-100GM</td>
			<td style="width:84px;"></td>
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			<td height="22" style="height:22px;width:167px;">Milli-Q DI water</td>
			<td style="width:84px;">Millipore</td>
			<td style="width:91px;">Milli-Q</td>
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			<td height="43" style="height:43px;width:167px;">Nitrogen (gas)</td>
			<td style="width:84px;">Airgas</td>
			<td style="width:91px;">UN1066</td>
			<td style="width:84px;"></td>
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		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Oxygen (gas)</td>
			<td style="width:84px;">Airgas</td>
			<td style="width:91px;">UN1072</td>
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			<td height="43" style="height:43px;width:167px;">Silicon wafers (4 in)</td>
			<td style="width:84px;">WRS Materials</td>
			<td style="width:91px;">CC8506</td>
			<td style="width:84px;"></td>
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			<td height="43" style="height:43px;width:167px;">SU-8 2002 (negative photo resist)</td>
			<td style="width:84px;">MicroChem</td>
			<td style="width:91px;">SU82002</td>
			<td style="width:84px;"></td>
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		<tr height="43">
			<td height="43" style="height:43px;width:167px;">SU-8 2050 (negative photoresist)</td>
			<td style="width:84px;">MicroChem</td>
			<td style="width:91px;">SU82050</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">SU-8 Developer solution</td>
			<td style="width:84px;">MicroChem</td>
			<td style="width:91px;">Y020100 4000L1PE</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="64">
			<td height="64" style="height:64px;width:167px;">Sulfuric acid</td>
			<td style="width:84px;">J.T. Baker</td>
			<td style="width:91px;">9681-03</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:167px;">Poly dimethy sulfoxide (PDMS)</td>
			<td style="width:84px;">Dow Corning</td>
			<td style="width:91px;">Sylgard -184</td>
			<td style="width:84px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:167px;">Toluene</td>
			<td style="width:84px;">Omnisolv</td>
			<td style="width:91px;">TX0737-1</td>
			<td style="width:84px;">
			
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fabrication and visualization of capillary bridges in slit pore geometry

介绍了在狭缝孔几何中创建和成像毛细金桥的程序。高纵横比疏水柱被制造和功能化，使其顶部表面亲水。物理特征（柱子）与化学边界（柱子顶部的亲水膜）的结合提供了物理和化学异质性，固定三重接触线，这是创建稳定长而窄的毛细管桥的必要特征。带有柱子的基板连接到玻璃滑梯上，并固定在定制支架上。然后，将支架安装在四轴微台上，并定位柱子并行并朝对方。毛细细金桥是在两个基材之间的间隙中引入流体形成的，一旦面柱之间的分离减少到几百微米。然后使用自定义微舞台来改变毛细细桥的高度。CCD 摄像机定位为毛细细桥的长度或宽度，以描述流体界面的形态。宽度低至250μm，长度可达70毫米的柱子是用这种方法制造的，导致毛细桥的纵横比（长度/宽度）超过1001。

实验装置的描述
实验装置可分为四个主要部分：1）顶部基板阶段，2）底部基板阶段，3）注射器/注射器xyz转换阶段，4）相机/光学和相机支架。每个细节如下：
<ol><li>
顶部基板阶段。 数字翻译阶段通过自定义机接件连接到 P 系列安装夹。安装夹连接到可变高度 P 柱，通过 P 系列夹叉固定在面包板上。定制连接件连接到翻译阶段的定制加工玻璃滑梯支架上，在 z ...

Watch this Scientific Journal Video about Fabrication and Visualization of Capillary Bridges in Slit Pore Geometry at JoVE.com

Fabrication and Visualization of Capillary Bridges in Slit Pore Geometry

介绍了在狭缝孔几何中创建和成像毛细金桥的程序。毛细管桥的创建依赖于柱子的形成，以提供定向物理和化学异质性来固定流体。 毛细金桥使用微舞台形成和操作，并使用 CCD 摄像机进行可视化。

狭缝孔几何中毛细金香桥的制造和可视化

A procedure for creating and imaging capillary bridges in slit-pore geometry is presented. High aspect ratio hydrophobic pillars are fabricated and ...

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