<div dir="auto"><div>Hi Fubo,</div><div dir="auto"><br></div><div dir="auto">I might try wet etching, depending on what contaminants you have, but making sure if doesn't etch Au.</div><div dir="auto"><br></div><div dir="auto">Cheers,</div><div><br></div><div data-smartmail="gmail_signature"><div dir="ltr">Carlos Gramajo<div>Cleanroom Research Scientist</div><div>Shared Equipment Authority (SEA), Rice University</div><div>Cell: 713-470-8115; Office: 713-348-8243; <a href="mailto:cg70@rice.edu" target="_blank">cg70@rice.edu</a></div></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, May 9, 2025, 6:38 PM Fubo Rao <<a href="mailto:furao@ucsd.edu">furao@ucsd.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>Dear Colleagues,</div><div><br></div><div>What would you recommend for cleaning this Au sputter target that has been partially coated/contaminated with other materials? There are probably a few material coatings on the target, before this was found out. Sputtering the materials off, or sand blasting will waste a lot of gold. Thanks in advance.</div><div><br></div><div><img src="cid:ii_mahdz8il0" alt="image.png" width="364" height="383"><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px"><br></div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Thanks,</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px"><br></div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Fubo Rao, Ph.D.,</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Nano3 Technical Director,<br></div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Qualcomm Institute/Atkinson Hall,</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">UC San Diego<br><a href="https://www.google.com/maps/search/9500+Gilman+Drive+%230436+La+Jolla,+CA+92093-0436?entry=gmail&source=g">9500 Gilman Drive #0436</a><br><a href="https://www.google.com/maps/search/9500+Gilman+Drive+%230436+La+Jolla,+CA+92093-0436?entry=gmail&source=g">La Jolla, CA 92093-0436</a></div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Tel. (858)534-4518</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">Cell: (858)375-9190</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px">E-mail: <a href="mailto:furao@ucsd.edu" style="color:rgb(17,85,204)" target="_blank" rel="noreferrer">furao@ucsd.edu</a></div><div><font color="#000000" face="Helvetica"><span style="font-size:14px"><a href="https://nanofab.ucsd.edu/" target="_blank" rel="noreferrer">https://nanofab.ucsd.edu/</a></span></font></div><div><font face="Helvetica" size="4" color="#00ff00"><a href="https://nanofab.ucsd.edu/about/" style="background-color:rgb(0,255,0)" target="_blank" rel="noreferrer">About Nano3</a></font></div><div><font color="#000000" face="Helvetica"><a href="https://www.linkedin.com/company/ucsd-nano3-shared-research-facility/" target="_blank" rel="noreferrer"><img src="https://ci3.googleusercontent.com/mail-sig/AIorK4zh1HPuORTDkboG98tWzyEUQOzhjyfga7tbJQPc8W3MHG-IJOX0fdynFzMytim3__psBT-N23H59iOa" alt="https://www.linkedin.com/company/ucsd-nano3-shared-research-facility/"></a><br></font></div></div></div></div></div>
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