IRIS publication 208092051
Fabrication of arrays of PZT nanodots via block copolymer self-assembly
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TY - JOUR - Varghese, J.; Ghoshal, T.; Deepak, N.; O’Regan, C.; Whatmore, R. W.; Morris, M. A.; Holmes, J. D. - 2013 - April - Chemistry of Materials - Fabrication of arrays of PZT nanodots via block copolymer self-assembly - Published - () - 25 - 8 - 1458 - 1463 - This Article presents a simple methodology for the fabrication of two-dimensional arrays of lead zirconate titanate (PZT) nanodots on n-doped Si substrates via the directed self-assembly of PS-b-PEO block copolymer templates. The approach produces highly ordered PZT nanodot patterns, with lateral widths and heights as small as 20 and 10 nm, respectively, and a coverage density as high as ∼68 × 109nanodots cm−2. The existence of a perovskite phase in the nanodots was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. The piezo-amplitude and ferroelectric domain response obtained from the nanodots, through piezoresponse force microscopy, confirmed the presence of ferroelectricity in the PZT arrays. Notably, PZT nanodots with a thickness ∼10 nm, which is close to the critical size limit of PZT, showed ferroelectric behavior. The presence of a multi-a/c domain structure in the nanodots was attributed to their polycrystalline nature. - http://pubs.acs.org/journal/cmatex - 10.1021/cm303759r DA - 2013/04 ER -
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@article{V208092051, = {Varghese, J. and Ghoshal, T. and Deepak, N. and O’Regan, C. and Whatmore, R. W. and Morris, M. A. and Holmes, J. D.}, = {2013}, = {April}, = {Chemistry of Materials}, = {Fabrication of arrays of PZT nanodots via block copolymer self-assembly}, = {Published}, = {()}, = {25}, = {8}, pages = {1458--1463}, = {{This Article presents a simple methodology for the fabrication of two-dimensional arrays of lead zirconate titanate (PZT) nanodots on n-doped Si substrates via the directed self-assembly of PS-b-PEO block copolymer templates. The approach produces highly ordered PZT nanodot patterns, with lateral widths and heights as small as 20 and 10 nm, respectively, and a coverage density as high as ∼68 × 109nanodots cm−2. The existence of a perovskite phase in the nanodots was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. The piezo-amplitude and ferroelectric domain response obtained from the nanodots, through piezoresponse force microscopy, confirmed the presence of ferroelectricity in the PZT arrays. Notably, PZT nanodots with a thickness ∼10 nm, which is close to the critical size limit of PZT, showed ferroelectric behavior. The presence of a multi-a/c domain structure in the nanodots was attributed to their polycrystalline nature.}}, = {http://pubs.acs.org/journal/cmatex}, = {10.1021/cm303759r}, source = {IRIS} }
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AUTHORS | Varghese, J.; Ghoshal, T.; Deepak, N.; O’Regan, C.; Whatmore, R. W.; Morris, M. A.; Holmes, J. D. | ||
YEAR | 2013 | ||
MONTH | April | ||
JOURNAL_CODE | Chemistry of Materials | ||
TITLE | Fabrication of arrays of PZT nanodots via block copolymer self-assembly | ||
STATUS | Published | ||
TIMES_CITED | () | ||
SEARCH_KEYWORD | |||
VOLUME | 25 | ||
ISSUE | 8 | ||
START_PAGE | 1458 | ||
END_PAGE | 1463 | ||
ABSTRACT | This Article presents a simple methodology for the fabrication of two-dimensional arrays of lead zirconate titanate (PZT) nanodots on n-doped Si substrates via the directed self-assembly of PS-b-PEO block copolymer templates. The approach produces highly ordered PZT nanodot patterns, with lateral widths and heights as small as 20 and 10 nm, respectively, and a coverage density as high as ∼68 × 109nanodots cm−2. The existence of a perovskite phase in the nanodots was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. The piezo-amplitude and ferroelectric domain response obtained from the nanodots, through piezoresponse force microscopy, confirmed the presence of ferroelectricity in the PZT arrays. Notably, PZT nanodots with a thickness ∼10 nm, which is close to the critical size limit of PZT, showed ferroelectric behavior. The presence of a multi-a/c domain structure in the nanodots was attributed to their polycrystalline nature. | ||
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URL | http://pubs.acs.org/journal/cmatex | ||
DOI_LINK | 10.1021/cm303759r | ||
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