In situ TEM observation of phase transition of the nanoscopic patterns on baroplastic block copolymer films during nanoindentationElectronic supplementary information (ESI) available: The details of the experimental process and several characterizations. See DOI: 10.1039/c3nr00447c

• Main Authors: Jo, Ara, Gu, Gil Ho, Moon, Hong Chul, Han, Sung Hyun, Oh, Sang Ho, Park, Chan Gyung, Kim, Jin Kon
• Format: Journal Article
• Language: English
• Published: 03.05.2013
• ISSN: 2040-3364; 2040-3372
• DOI: 10.1039/c3nr00447c

We investigated the in situ phase transition of the nanoscopic patterns on block copolymer thin films during nanoindentation by using a transmission electron microscope (TEM) with a specially designed nanoindenter. For the first time, we observed directly an in situ phase transition from lamellar microdomains to disordered states during the nanoindentation on a baroplastic polystyrene- block -poly( n -pentyl methacrylate) copolymer (PS- b -P n PMA) film. Through the in situ TEM observation, the mechanism of the nanoscopic pattern formation on a block copolymer thin film by indentation is fully understood. We investigated the in situ phase transition from lamellar nanodomains to disordered states during the nanoindentation on a baroplastic block copolymer film by using a TEM with a nanoindenter.