Cleanroom Scientist (IMAGE) DOE/Brookhaven National Laboratory Caption Brookhaven physicist Aaron Stein, lead author on the study, is in the cleanroom at the Center for Functional Nanomaterials (CFN) at Brookhaven National Laboratory. Stein and his co-authors used the electron beam lithography writer in the background to etch templates that drive the self-assembly of block copolymers in precisely controllable ways. Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.