<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-20T11:17:17Z</responseDate><request verb="GetRecord" identifier="oai:dspace.mit.edu:1721.1/46057" metadataPrefix="dim">https://dspace.mit.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:dspace.mit.edu:1721.1/46057</identifier><datestamp>2022-01-13T07:54:36Z</datestamp><setSpec>com_1721.1_7582</setSpec><setSpec>com_1721.1_7581</setSpec><setSpec>col_1721.1_131023</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Daniel J. Ehrlich and Todd Thorsen.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Cartas Ayala, Marco Aurelio</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="other" lang="en_US">Massachusetts Institute of Technology. Dept. of Mechanical Engineering.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department">Massachusetts Institute of Technology. Department of Mechanical Engineering</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2009-06-30T17:11:48Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="available">2009-06-30T17:11:48Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/1721.1/46057</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="oclc" lang="en_US">373873805</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (leaves 140-142).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">In this document I discuss the fabrication of metallic, aluminum and aluminum oxide, 3D micro channels, made with standard milling technology, along with two channel closing methods for openable devices: half cured-glued PDMS and Pressure Sensitive Adhesive (PSA) Film. Using the aluminum oxide coated micro channels, along with the half cured-glued PDMS process to close the channels and external fast speed valves for actuation, a microfluidic switch for cell sorting capable of operating at 48 Hz was designed, fabricated and tested. The use of aluminum as a channel substrate provides channel strength and short heat dissipation times, and the use of aluminum oxide enhances light energy absorption, which provides the possibility of further laser actuation. Also, the combination of micro fabrication process and actuation technique makes possible the further scaling and handling of large cells as cardiocytes.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Marco Aurelio Cartas Ayala.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">S.M.</dim:field>
   <dim:field mdschema="dc" element="format" qualifier="extent" lang="en_US">142 leaves</dim:field>
   <dim:field mdschema="dc" element="language" qualifier="iso" lang="en_US">eng</dim:field>
   <dim:field mdschema="dc" element="publisher" lang="en_US">Massachusetts Institute of Technology</dim:field>
   <dim:field mdschema="dc" element="rights" lang="en_US">M.I.T. theses are protected by 
copyright. They may be viewed from this source for any purpose, but 
reproduction or distribution in any format is prohibited without written 
permission. See provided URL for inquiries about permission.</dim:field>
   <dim:field mdschema="dc" element="rights" qualifier="uri" lang="en_US">http://dspace.mit.edu/handle/1721.1/7582</dim:field>
   <dim:field mdschema="dc" element="subject" lang="en_US">Mechanical Engineering.</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">Fabrication process for openable microfluidic devices and externally actuated microfluidic switch</dim:field>
   <dim:field mdschema="dc" element="type" lang="en_US">Thesis</dim:field>
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	&lt;Language>eng&lt;/Language>
   	&lt;Title>Fabrication process for openable microfluidic devices and externally actuated microfluidic switch&lt;/Title>
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   	&lt;PublicationDate>2008&lt;/PublicationDate>
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        	&lt;DisplayName>Cartas Ayala, Marco Aurelio&lt;/DisplayName>
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            &lt;DisplayName>Massachusetts Institute of Technology&lt;/DisplayName>
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    &lt;License>http://dspace.mit.edu/handle/1721.1/7582&lt;/License>
    &lt;Keyword>Mechanical Engineering.&lt;/Keyword>
   	&lt;Abstract>In this document I discuss the fabrication of metallic, aluminum and aluminum oxide, 3D micro channels, made with standard milling technology, along with two channel closing methods for openable devices: half cured-glued PDMS and Pressure Sensitive Adhesive (PSA) Film. Using the aluminum oxide coated micro channels, along with the half cured-glued PDMS process to close the channels and external fast speed valves for actuation, a microfluidic switch for cell sorting capable of operating at 48 Hz was designed, fabricated and tested. The use of aluminum as a channel substrate provides channel strength and short heat dissipation times, and the use of aluminum oxide enhances light energy absorption, which provides the possibility of further laser actuation. Also, the combination of micro fabrication process and actuation technique makes possible the further scaling and handling of large cells as cardiocytes.&lt;/Abstract>
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