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<p class="MsoNormal"><span style="font-size:11.0pt">Thank you for the information, Nuri. I should have specified in my original email that we are using the Iridium in a Temescal BJD2000 electron beam evaporator. I was hoping to get some feedback from those
that may have used Ir in a similar system.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Oncel, Nuri <nuri.oncel@und.edu>
<br>
<b>Sent:</b> Tuesday, August 4, 2026 1:18 PM<br>
<b>To:</b> EDWARDS, JASON R CTR USAF AFMC AFRL/RYDD <jason.edwards.30.ctr@us.af.mil>; labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [Non-DoD Source] Re: Evaporating Iridium<o:p></o:p></span></p>
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<span style="font-size:9.0pt;font-family:wf_segoe-ui_normal;color:#212121">You don't often get email from
<a href="mailto:nuri.oncel@und.edu">nuri.oncel@und.edu</a>. <a href="https://aka.ms/LearnAboutSenderIdentification">
Learn why this is important</a> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Hi Jason,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">I have deposited Ir on a variety of surfaces, and the process is actually quite straightforward. I simply connected an Ir wire to a high current feedthrough (connected to a UHV STM chamber) and
passed the current through it to evaporate the metal. I calibrated the deposition rate using Auger.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">A common approach is to use a W wire and wrap the source material around it. However, that method can also result in some W being co-deposited along with Iridium.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">For your reference, I've attached three of my papers that mention Ir deposition.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Please feel free to reach out if you have any questions or if there's anything else I can help with.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Best,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Nuri<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
<p class="elementtoproof">Professor Nuri Oncel, Ph.D.<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="elementtoproof"><span style="color:blue"><a href="https://www.und.edu/Nanofoundry">Director of UND-NanoFoundry</a></span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="elementtoproof">Department of Physics and Astrophysics<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="elementtoproof">University of North Dakota<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="elementtoproof"><span style="color:blue"><a href="https://sites.google.com/view/oncel-research-group/group">https://sites.google.com/view/oncel-research-group/group</a></span><span style="color:black"> </span><o:p></o:p></p>
<p class="elementtoproof"> <o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu">labnetwork-bounces@mtl.mit.edu</a>>
on behalf of EDWARDS, JASON R CTR USAF AFMC AFRL/RYDD <<a href="mailto:jason.edwards.30.ctr@us.af.mil">jason.edwards.30.ctr@us.af.mil</a>><br>
<b>Sent:</b> Tuesday, August 4, 2026 8:09 AM<br>
<b>To:</b> <a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a> <<a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>><br>
<b>Subject:</b> [labnetwork] Evaporating Iridium</span> <o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:11.0pt">Good morning network,</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> I am interested to see if any of you have experience using Iridium in your evaporation systems. We are getting conflicting information from various manufacturers on how we should go about melting
our Iridium. Our OEM recommends melting straight in the pocket while Lesker recommends using their Fabmate crucible liner. If you evaporate Iridium, do you use a liner in your system? In what form do you receive your Iridium? Pellets, shot, rods? For what
it is worth the Iridium that was purchased for us is flat fractured pieces ranging in size from dust to 8mm, which seems less than ideal.</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">Thanks,</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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