In situ TEM observation of phase transition of the nanoscopic patterns on baroplastic block copolymer films during nanoindentation

Ara Jo, Gil Ho Gu, Hong Chul Moon, Sung Hyun Han, Sang Ho Oh, Chan Gyung Park, Jin Kon Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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-PnPMA) 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.

Original languageEnglish (US)
Pages (from-to)4351-4354
Number of pages4
JournalNanoscale
Volume5
Issue number10
DOIs
StatePublished - May 21 2013

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