Dear BNC User, Attached is a reminder for Birck's upcoming preventative maintenance closure scheduled to begin October 27 and go through November 3, 2025. Please let us know if you have any questions. Thank you, Dan Hosler Senior Research Facility Planning Engineer Birck Nanotechnology Center | Room 1120 Office: 765.496.3883 | Email: dhosler@purdue.edu<mailto:dhosler@purdue.edu>