<div dir="ltr"><div dir="ltr">Medusa has adhesion problems- that's old news. Do we have a faq file about that? <div><br></div><div>HSQ storage and use tips can be found on <a href="https://nano.yale.edu/hsq-essential-tips">this page.</a><div><a href="https://nano.yale.edu/hsq-essential-tips">https://nano.yale.edu/hsq-essential-tips</a></div><div><br></div><div>I just ordered another liter of fox16, with a three-month lead time. No problem- we'll just freeze it. This is convenient and easy. </div><div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">--------------------------------<div><font size="1">Michael Rooks</font></div><div><font size="1"><a href="http://nano.yale.edu" target="_blank">nano.yale.edu</a></font> </div></div></div></div><br></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 6, 2021 at 7:45 PM Mark K Mondol <<a href="mailto:mondol@mit.edu">mondol@mit.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>Long:</p>
<p><br>
</p>
<p>Mike Rooks will probably also chime in with better information than I have, but LN2 freezing has worked really well for me and is reasonably convenient for me as I already have LN2 dewars in my lab for other reasons. I bought a big dewar that holds racks
of cryo tubes (Chart MVE CryoSystem4000Cryogenic about $3,800 with wheels) that makes it easy to store. The hold time when about 1/3 filled so that the HSQ is not actually immersed in liquid is >6weeks, probably much more.</p>
<p><br>
</p>
<p>One way of reducing cost is to order the 6% HSQ and dilute it with Dow MIBK which is very expensive but has worked well for me ( $420/500ml -
</p>
<p>DC MIBK RINSE SOLVENT 500 ML) which should be available from your HSQ distributor.</p>
<p><br>
</p>
<p>Regards,</p>
<p><br>
</p>
<p>Mark K Mondol<br>
</p>
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<font color="3366FF">Mark K Mondol<br>
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<div><font color="3366FF">Assistant Director NanoStructures Laboratory <br>
</font></div>
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<div><font color="3366FF">And <br>
</font></div>
<font color="3366FF"></font>
<div><font color="3366FF">Facility Manager Scanning Electron Beam Lithography Facility
<br>
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<div><font color="3366FF">Bldg 36 Room 229 <br>
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<div><font color="3366FF"> <a href="mailto:mondol@mit.edu" target="_blank">mondol@mit.edu</a> <br>
</font></div>
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<div><font color="3366FF">office - 617-253-9617 <br>
</font></div>
<font color="3366FF"></font>
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<div id="gmail-m_-938880617254249576divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a>> on behalf of Chang, Long <<a href="mailto:lvchang@Central.UH.EDU" target="_blank">lvchang@Central.UH.EDU</a>><br>
<b>Sent:</b> Thursday, May 6, 2021 12:26 PM<br>
<b>To:</b> <a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a><br>
<b>Subject:</b> [labnetwork] HSQ Alternatives</font>
<div> </div>
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<div>Hi All,
<div><br>
</div>
<div>I’m looking for HSQ alternatives since it’s expensive, has a 14 week lead time and comes in 250mL bottle. We waste most of the bottle due to it’s 6 months shelf life. Although we had some bottles still good after 2 years at 5C, it’s just a huge
gamble after a year. We tried LN2 freezing, but it takes too much effort.</div>
<div><br>
</div>
<div>I’ve attached a table of the cost per mL for the alternatives I found assuming you want 100nm thick. The AQM and EMResist are in powder form and advertise 1 year powder shelf life and 3 months mixture shelf life. They can distribute the powder
into many small bottles. </div>
<div><br>
</div>
<div>Particularly interesting is the Medusa 82 which has the lowest cost and advertises better shelf life. Does anyone have experience with these HSQ alternatives?</div>
<div><br>
</div>
<div><img id="gmail-m_-938880617254249576B22AB60B-4D51-4545-A7EB-6C2B9D076D07" src="cid:179441bb1856efd336f1"></div>
<div><br>
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<div>Thanks,<br>
<div>
<div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">
Long</div>
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<br>
</div>
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</div>
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