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<p class="MsoNormal"><span style="color:#1F497D">Fouad,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">For work at the Cornell NanoScale Facility, I developed a small drop bottle of diluted Triton X-100 for users to add to any etching solution they wanted to add a surfactant to. The key to success is to remember
that with surfactants, a little goes a long way. Trying to determine the proper concentration I came across a publications (sorry I don’t have the reference) that showed that the micelle density for the Triton X-100 seemed to plateau at a concentration of
about 100 ppm. So, I purchased a small eye dropper style bottle, diluted it with water to the proper amount, and labeled the bottle with directions to add 1 – 2 drops per 100 mL of etching solution to get to the 100 ppm concentration. That way, researchers
could chose to have an etchant with surfactant or without, depending on their application, without overfilling our chemical cabinets. We also point to that instead of using IPA for KOH etching due to flammability issues. I didn’t do too many tests on it but
the comments from the users who tried it were generally favorable.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Prior to this, a few users would pour the 100% Triton into the container, usually leaving a layer floating on top of the etchant. Once they dipped their wafers into that mess, the Triton would never come off
the substrate or the container. Highly dilute is the key.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I hope this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D">Dan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Daniel Woodie<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Safety Manager, College of Engineering<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>Fouad Karouta<br>
<b>Sent:</b> Thursday, August 09, 2012 3:33 AM<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] Dilution of Triton X-100<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Hello all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Recently when discussing with Bill Flounders about adding a surfactant to BHF solution he suggested to use Triton X-100.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">We like to use it in a diluted form. From internet I could find water, toluene, xylene and ethanol can be used as diluent. However water may turn the solution gelatinous.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Does anyone have experience with diluting triton x-100 (supplier Sigma Aldrich)?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Fouad Karouta<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">*********************************<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Facility Manager ANFF ACT Node<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Research School of Physics and Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Australian National University<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">ACT 0200, Canberra, Australia<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Tel: + 61 2 6125 7174<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Mob: + 61 451 046 412<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D">Email: <a href="mailto:fouad.karouta@anu.edu.au">
fouad.karouta@anu.edu.au</a><o:p></o:p></span></p>
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