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Evidence of ferroelectricity and phase transition in pressed diphenylalanine peptide nanotubes
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10.1063/1.3676417
/content/aip/journal/apl/100/4/10.1063/1.3676417
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/4/10.1063/1.3676417
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) SEM images of (a) stand-alone tubes, (b) after cold pressing under 50 MPa, (c) after annealing at 150 °C. Yellow arrows show remaining tube fragments (abundant for annealed tubes).

Image of FIG. 2.
FIG. 2.

(Color online) (a) OOP PFM image of PNT pellet (before annealing). (b) OOP PFM image of annealed (150 °C) pellet. (c) OOP after poling under +100 and −100 V for annealed sample. (d) Comparison of PFM histograms in PNT pellets. Insets to (a) and (c) are the corresponding IP images (horizontal scales 25 × 25 and 20 × 20 μm2, respectively). Dotted lines delineate poling areas (10 passes of the cantilever).

Image of FIG. 3.
FIG. 3.

(Color online) (a) Polarization hysteresis loops of PNT pellets before and after annealing. (b) Temperature dependence of the dielectric permittivity and inverse dielectric permittivity (inset) in as-pressed sample. Arrows indicate heating or cooling cycles.

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/content/aip/journal/apl/100/4/10.1063/1.3676417
2012-01-24
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evidence of ferroelectricity and phase transition in pressed diphenylalanine peptide nanotubes
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/4/10.1063/1.3676417
10.1063/1.3676417
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