All BNC Users: The Birck Nanotechnology Center semiannual preventive maintenance shutdown will take place during the week of April 30, 2012. Cleanroom and Laboratories operations will be affected during the week. Details for the preventive maintenance shutdown will be communicated as April 30 approaches. Thank you for your cooperation during this important preventive maintenance shutdown. Mark Voorhis Building Manager Purdue University Birck Nanotechnology Center Office: (765) 494-3036