Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Skiadopoulou, Stella; Kamba, S.; Drahokoupil, Jan; Kroupa, J.; Deepak, Nitin; Pemble, Martyn E.; Whatmore, R. W.

doi:10.1002/adfm.201502441

Cited by 7 publications

(4 citation statements)

References 34 publications

(85 reference statements)

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“…[32] However, some non-ferroelectric contributions, such as charge injection, can also result in long-lived "switched" states with relaxation time up to days. [33,34] To rule out the contributions from charge injection, electrostatic force microscopy (EFM) was performed on the electrically-written region (Figures 5g and h).…”

Section: Ferroelectric Propertiesmentioning

confidence: 99%

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Yao

Naden

Zhang

et al. 2020

Journal of the European Ceramic Society

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This work reports on direct crystallization of PbZr 0.53 Ti 0.47 O 3 (PZT) thin films on glass and polymeric substrates, through the use of pulsed thermal processing (PTP). Specifically a xenon flash lamp is used to deliver pulses of high intensity, short duration broadband light to the surface of a chemical solution deposited thin film, resulting ultimately in the crystallization of the film. Structural analysis by X-ray diffraction and transmission electron microscopy show the existence of perovskite structure in nano-sized grains (≤ 5nm). Local functional analysis by band excitation piezoelectric spectroscopy and electrostatic force microscopy confirm presence of a ferroelectric phase and retention of voltage-written polarization for multiple days.

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Section: Ferroelectric Propertiesmentioning

confidence: 99%

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Yao

Naden

Zhang

et al. 2020

Journal of the European Ceramic Society

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“…It has been reported that the materials with a polar structure have versatile properties involving pyroelectricity, ferroelectricity, and nonlinear optical behavior. 21 By combination with atomic force microscopy (AFM), Kelvin probe force micros-copy (KPFM) can enable nanometer-scale imaging of the surface potential on a wide range of polar structured materials. 22 Due to the influence of the polar structure, the separation of charge carriers can help to reduce the recombination of e−h pairs.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Origin of High Dechlorination Activity in Polar Materials M₂B₅O₉Cl (M = Ca, Sr, Ba, Pb) with Built-In Electric Field

Fan

Wang

et al. 2016

Chem. Mater.

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Polar photocatalyst materials usually exhibit ferroelectric characteristics giving rise to spontaneous polarization behavior which works as a driving force for the separation of photogenerated electrons and holes and mitigates the effect of charge recombination. This study shows that the surface potential changes for a polar phtotocatalyst before and after photoirradiation can be used to predict the photocatalytic activities among different phtotocatalysts. We systematically investigated the correlation among the surface properties, crystal structure, electronic band structure, photocatalytic activity, and stability of four B−O and alkaline earth cations containing photocatalysts, M 2 B 5 O 9 Cl (M = Ca, Sr, Ba, Pb). Among the four studied photocatalysts, Ba 2 B 5 O 9 Cl exhibits the greatest changes in the surface potential after photoirradiation and also shows the highest photocatalytic activity for dechlorination of chlorophenols under UV light irradiation. Its photocatalytic activity is about 1.3, 2.8, 4.4, and 15 times those of Ca 2 B 5 O 9 Cl, Sr 2 B 5 O 9 Cl, Pb 2 B 5 O 9 Cl, and P25 samples, respectively. The results support that the photocatalytic activity of the four photocatalysts strongly depends on the spontaneous polarization power. Overall, these findings demonstrate the utility of Kelvin probe force microscopy that can screen for a highly efficient photodegradation materials in the field of photocatalysis.

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“…335 However, charge injection can result in longlived states with relaxation times that are extremely long (e.g. hours or even days, and even persisting at high temperature 344,345 ), and therefore, these also cannot be used as unambiguous proof of ferroelectric switching.…”

Section: Via Means To Distinguish Piezoelectric From Non-piezoelectmentioning

confidence: 99%

Ferroelectric or non-ferroelectric: Why so many materials exhibit “ferroelectricity” on the nanoscale

Vasudevan

Balke

Maksymovych

et al. 2017

Applied Physics Reviews

270

206

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Ferroelectric materials have remained one of the foci of condensed matter physics and materials science for over 50 years. In the last 20 years, the development of voltage-modulated scanning probe microscopy techniques, exemplified by Piezoresponse force microscopy (PFM) and associated time-and voltage spectroscopies, opened a pathway to explore these materials on a single-digit nanometer level. Consequently, domain structures, walls and polarization dynamics can now be imaged in real space. More generally, PFM has allowed studying electromechanical coupling in a broad variety of materials ranging from ionics to biological systems. It can also be anticipated that the recent Nobel prize 1 in molecular electromechanical machines will result in rapid growth in interest in PFM as a method to probe their behavior on single device and device assembly levels. However, the broad introduction of PFM also resulted in a growing number of reports on nearly-ubiquitous presence of ferroelectric-like phenomena including remnant polar states and electromechanical hysteresis loops in materials which are non-ferroelectric in the bulk, or in cases where size effects are expected to suppress ferroelectricity. While in certain cases plausible physical mechanisms can be suggested, there is remarkable similarity in observed behaviors, irrespective of the materials system. In this review, we summarize the basic principles of PFM, briefly discuss the features of ferroelectric surfaces salient to PFM imaging and spectroscopy, and summarize existing reports on ferroelectric-like responses in non-classical ferroelectric materials. We further discuss possible mechanisms behind observed behaviors, and possible experimental strategies for their identification.3

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Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Cited by 7 publications

References 34 publications

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Exploring the Origin of High Dechlorination Activity in Polar Materials M₂B₅O₉Cl (M = Ca, Sr, Ba, Pb) with Built-In Electric Field

Ferroelectric or non-ferroelectric: Why so many materials exhibit “ferroelectricity” on the nanoscale

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Comment on “Interesting Evidence for Template‐Induced Ferroelectric Behavior in Ultra‐Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates”

Cited by 7 publications

References 34 publications

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Direct processing of PbZr0.53Ti0.47O3 films on glass and polymeric substrates

Exploring the Origin of High Dechlorination Activity in Polar Materials M2B5O9Cl (M = Ca, Sr, Ba, Pb) with Built-In Electric Field

Ferroelectric or non-ferroelectric: Why so many materials exhibit “ferroelectricity” on the nanoscale

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Exploring the Origin of High Dechlorination Activity in Polar Materials M₂B₅O₉Cl (M = Ca, Sr, Ba, Pb) with Built-In Electric Field