title: Line-patterning of polyaniline coated MWCNT on stepped substrates using DC electric field.
abstract: Printing electronic components on a chip edge and a stepped substrate with functional inks are an attractive approach for achieving flexible and inexpensive circuits for applications such as flexible displays and large-area chemo/bio/radioactivity sensors. However, it is still challenging because a sufficient cover of the 100 μm high step at the chip edge with a high-resolution pattern is the hardest part of the layer assembling by inkjet printing. Herein, we present a simple and effective strategy to generate electrically conductive line-patterns on stepped substrates by applying the DC electric field. On the surface of flat polyimide substrate, the fine line-pattern (less than 850 nm in line width) is achieved with a polyaniline coated MWCNT dispersed ink. Furthermore, 9.9 μm of line width is successfully patterned on the high stepped poly(dimethylsiloxane) substrate, higher than 100 μm, by printing only 1 time.
authors.affiliation: Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon 305-353, Korea.
authors.forename: Young Gun
authors.initials: YG
authors.lastname: Ko
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Tae Gu
authors.initials: TG
authors.lastname: Do
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Tae
authors.initials: T
authors.lastname: Gu
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Oh
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Hyun Jeong
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Hung-gu
authors.initials: HG
authors.lastname: Han
authors.affiliation: Center for Bionics, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Choong Hyun
authors.initials: CH
authors.lastname: Kim
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea.
authors.forename: Ung Su
authors.initials: US
authors.lastname: Choi