Structural and electrical investigation of laser annealed (Pb,Sr)TiO3 thin films

Wang, Jyh-Liang; Lai, Yi-Sheng; Liou, Sz‐Chian; Chiou, Bi–Shiou; Jan, Chueh-Kuei; Cheng, Huang–Chung

doi:10.1116/1.2819255

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…Excimer laser annealing (ELA) is a promising technique to selectively crystallize ferroelectric oxide thin films (Chart , solid diamond symbol) − as well as other functional metal oxide thin films. , In particular, the UV excimer laser is suitable for the selective annealing of the ferroelectric oxide materials as they usually have optical bandgaps of 2.5–4 eV and absorb UV light in the near-surface region. Owing to the extremely high energy and short pulse width of the excimer laser, the absorbed light energy generates a highly energetic heat flow from the surface into the thin film interior without inducing thermal damage in the polymer substrate.…”

Section: Introductionmentioning

confidence: 99%

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

et al. 2020

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The outstanding multifunctionality of ferroelectric oxides has opened up new fields in microelectronics. However, the high crystallization temperature of the ferroelectric oxides limits their integration into functional platforms, such as flexible polymers. Here, the direct synthesis of the ferroelectric oxide thin films on the flexible polymer platforms is demonstrated. A new growth mechanism for the oxide thin film, named laser-activated liquid phase crystallization, has been discovered, which facilitates the ultrafast low-temperature crystallization of the ferroelectric PbZr0.52Ti0.48O3 (PZT) thin film. Through this mechanism, a homogeneous crystalline PZT thin film is obtained on a flexible polyimide substrate at 200 °C. The flexible PZT film is found to exhibit outstanding ferroelectric and piezoelectric properties along both the in-plane and out-of-plane direction. Exploiting the flexible PZT thin film, flexible ferroelectric capacitors and piezoelectric sensors are demonstrated. The findings of this study provide new functions in flexible electronics and shall pave the way for entirely new applications.

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Section: Introductionmentioning

confidence: 99%

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

et al. 2020

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Near‐Field Nanoscopic Terahertz Imaging of Single Proteins

Yang

Tang

et al. 2020

Small

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Terahertz (THz) biological imaging has attracted intense attention due to its capability of acquiring physicochemical information in a label‐free, noninvasive, and nonionizing manner. However, extending THz imaging to the single‐molecule level remains a challenge, partly due to the weak THz reflectivity of biomolecules with low dielectric constants. Here, the development of graphene‐mediated THz scattering‐type scanning near‐field optical microscope for direct imaging of single proteins is reported. Importantly, it is found that a graphene substrate with high THz reflectivity and atomic flatness can provide high THz contrast against the protein molecules. In addition, a platinum probe with an optimized shaft length is found enabling the enhancement of the amplitude of the scattered THz near‐field signals. By coupling these effects, the topographical and THz scattering images of individual immunoglobulin G (IgG) and ferritin molecules with the size of a few nanometers are obtained, simultaneously. The demonstrated strategy thus opens new routes to imaging single biomolecules with THz.

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Unusual DNA Structures Formed on Bare Highly Oriented Pyrolytic Graphite Surfaces Studied by Atomic Force Microscopy

Liu¹,

Zhao²,

Zu³

et al. 2013

Microsc Microanal

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It is important to know the detailed DNA structure on carbonaceous surfaces for further application of DNA-functionalized carbonaceous materials in diverse research areas. In this study, the topographic and structural characteristics of the separated single DNA molecules and their assembly on highly oriented pyrolytic graphite (HOPG) surfaces have been investigated by atomic force microscopy (AFM). AFM results indicate that both circular and linear DNA molecules tend to form hexagonal patterns along with some unusual structures that include node, protrusion, cruciform, parallel single-stranded DNA (ssDNA), and compact zigzag. Furthermore, parallel ssDNA patterns and their crossed structures have been obtained under high-temperature conditions. Our AFM results reveal that a bare HOPG surface can induce DNA molecules to form various unusual structures. This finding is helpful for understanding the adsorption behavior of DNA on other carbonaceous surfaces such as carbon nanotubes and graphene. In addition, the hexagonal DNA patterns in this study are similar to those formed on the alkylamine-modified HOPG surface, which implies that a bare HOPG, without any chemical modification, has a strong ability to align biomolecules. This study could expand our knowledge of the diversities of DNA structures and the aligning ability of carbonaceous surfaces.

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Structural and electrical investigation of laser annealed (Pb,Sr)TiO3 thin films

Cited by 4 publications

References 24 publications

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

Near‐Field Nanoscopic Terahertz Imaging of Single Proteins

Unusual DNA Structures Formed on Bare Highly Oriented Pyrolytic Graphite Surfaces Studied by Atomic Force Microscopy

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