Phase evolution in zirconia thin films prepared by pulsed laser deposition

Mishra, Maneesha; Kuppusami, P.; Singh, Akash; Ramya, S.; Sivasubramanian, V.; Mohandas, E.

doi:10.1016/j.apsusc.2012.01.160

Cited by 16 publications

(5 citation statements)

References 61 publications

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“…This is also another reason for the formation of tZrO 2 . A detailed study on phase evolution in zirconia films prepared from a sintered target containing two phase structure has been also recently reported by us [23].…”

Section: Discussionmentioning

confidence: 94%

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Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

Mishra

Kuppusami

Murugesan

et al. 2015

Materials Chemistry and Physics

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Section: Discussionmentioning

confidence: 94%

“…The details of the target sintering methods, their characterizations and substrate cleaning methods were already reported in previous publications [22,23]. A KrF excimer laser (Lambda Physik Compex-205, 248 nm wavelength) was used as the energy source to evaporate the targets for multilayer deposition.…”

Section: Methodsmentioning

confidence: 99%

Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

Mishra

Kuppusami

Murugesan

et al. 2015

Materials Chemistry and Physics

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“…However, UiO‐66‐NH 2 @Ti precursor can be transformed to their corresponding metal oxides after calcination. Consequently, diffraction peaks of ZrO 2 and TiO 2 can be identified, and the peaks at 25.7°,37.0°, 47.9°, 53.7°, and 55.0° can belong to the (101), (004), (200), (105), and (211) crystal planes of anatase TiO 2 (JCPDS 21‐1272), 35 whereas peaks value at 30.1°, 34.9°, 50.2°,60.2°, and 62.9° are ascribed to the (111), (200), (220), (121), and (202) crystal planes of ZrO 2 (JCPDS 50‐1089) 36 . Furthermore, the newly emerged peaks in the ZrO 2 @TiO 2 /Ag (green curve) at 38.20°, 44.40°, 64.60°, and 77.40° are attributed to the (111), Ag (200), Ag (220), and Ag (311) crystal planes of Ag (JCPDS 04‐0783).…”

Section: Resultsmentioning

confidence: 99%

The synergetic enhancement of the porous ZrO₂@TiO₂ heterostructure and the plasmonic silver nanoparticles for efficient surface‐enhanced Raman scattering

Shi

Guo

et al. 2023

Applied Organom Chemis

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Rapid identification and analysis of pesticide residue on real-world sample by a portable platform is of growing interest for monitoring food safety and safeguarding human health. Herein, we developed a robust surface-enhanced Raman spectroscopy (SERS) sensor based on ZrO 2 @TiO 2 /Ag substrate for the analysis of pesticide residues. The synergetic effects of the metal organic framework (MOF)-derived porous ZrO 2 @TiO 2 heterostructure induced charge transfer enhancement and the electromagnetic enhancement from the plasmonic silver nanoparticles (AgNPs) hotspot generate significant SERS enhancement signal. The SERS substrate exhibits superior long-term stability and signal homogeneity for SERS quantitative analysis. The platform has the capability to detect not only model molecule of 4-ATP but also pesticides of triazophos and fonofos at the extremely low concentration of 10 À8 M. Moreover, we simulate the quantitative detection of pesticide residue on real objects by spraying pesticides on dendrobium and chrysanthemum leaves, followed by transferring to the SERS platform to perform analysis. The nearly linear fitting curve with a wide concentration range suggests the superior qualitative detection capability.Remarkably, two components and three components of the pesticides are readily identified in a rapid way. The approach provides the rapid analysis, lowcost device, and portable and quantitative pesticide identification and offers a clear path to multicomponent analysis at a trace level. K E Y W O R D Sidentification and quantification, metal organic frames, rapid pesticide analysis, surfaceenhanced Raman spectroscopy (SERS), ZrO 2 @TiO 2 heterojunction

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“…The percent composition of each phase was calculated from the strongest peak intensity of the characteristic peak determined using software available with the equipment. 27 V γ = I γ(101) I γ(101) + I α(003) Surface morphologies were obtained using an FEI Quanta 250 FEG HRSEM with a field emission source and images using an Everhart-Thornley SE (secondary electron) detector with an electron accelerating voltage of 10 kV and a sample height of 10 mm. Sample for transmission electron microscopy (TEM) was prepared by a focused ion beam (FIB) instrument (FEI Strata 400s Dual Beam FIB), combined with a scanning electron beam and an ion beam.…”

Section: Methodsmentioning

confidence: 99%

Role of Exposure Atmospheres on Particle Coarsening and Phase Transformation of LiAlO₂

Heo

Uddin

et al. 2017

J. Electrochem. Soc.

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The phase transformation and particle coarsening of lithium aluminate (α-LiAlO 2 ) in electrolyte are the major causes of degradation affecting the performance and the lifetime of the molten carbonate fuel cell (MCFC). The stability of LiAlO 2 has been studied in Li 2 CO 3 -Na 2 CO 3 electrolyte under accelerated conditions in reducing and oxidizing gas atmospheres at temperatures of 650 and 750 for up to 500 hours. X-ray diffraction analyses show that the progressive transformation of α-LiAlO 2 to γ-LiAlO 2 phase proceeds with increasing temperature in lower P CO 2 and lower P O 2 environments. Spherical LiAlO 2 particles were transformed to coarsened pyramid-shape particles in 4% H 2 -3% H 2 O-N 2 and 100% N 2 (∼10 ppm P O 2 ) atmospheres. Under CO 2 -rich atmospheres (4% H 2 -30% CO 2 -N 2 and 70% air-30% CO 2 ), both phase and particle size remained unchanged at 650 and 750 • C. Selected area electron diffraction (SAED) pattern analysis indicated that the large pyramidal shape particles (∼30 μm) were γ-LiAlO 2 phase. Experimental observations and related simulation results pertaining to particle coarsening and phase transformation behavior of Molten carbonate fuel cell (MCFC) power generation systems are currently being developed and commercialized because of their demonstrated high electrical efficiency (>45% net electrical AC and >90% combined heat and electric), multi-fuel operational flexibility (pipeline natural gas, bio-gases from farm waste and wastewater treatment), pollution-free operation (no NO x , SO x , PM's, VOC) and reduced CO 2 foot print.1-3 A large number of MCFC power plants in multi -MWe class have been successfully installed and operated in North America, Europe and Asia demonstrating the technology and systems engineering robustness. 4 Over the last decade, optimization of cell and stack operating conditions, materials chemistry and fabrication processes have resulted in significant improvement of the cell life and performance making it possible to obtain long life (>50,000 hrs.) of MWe class systems.5 A need to increase the system life time to >80,000 hours has been identified as next steps for increased market penetration and cost reduction. 6 For the state of the art MCFC's, the electrical performance degradation is commonly assigned to cell and stack component corrosion, structural changes, and electrolyte loss. Although effective mitigation strategies for a number of materials related degradation issues (anode creep, cathode dissolution, current collectors and bipolar plate corrosion) have been developed and implemented, 7,8 challenge with matrix coarsening beyond 60,000 hours remains.The lithium aluminate (LiAlO 2 ) is the state-of-the-art ceramic constituent material in the electrolyte matrix. It effectively retains the liquid electrolyte and prevents gas crossover with sufficient finepore structure stability.9 LiAlO 2 exists in three different allotropic forms which are hexagonal α-LiAlO 2 (ρ = 3.401 g/cm 3 ), monoclinic β-LiAlO 2 (ρ = 2.615 g/cm 3 ), and tetragonal γ-LiAlO 2 (ρ...

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Phase evolution in zirconia thin films prepared by pulsed laser deposition

Cited by 16 publications

References 61 publications

Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

The synergetic enhancement of the porous ZrO₂@TiO₂ heterostructure and the plasmonic silver nanoparticles for efficient surface‐enhanced Raman scattering

Role of Exposure Atmospheres on Particle Coarsening and Phase Transformation of LiAlO₂

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Phase evolution in zirconia thin films prepared by pulsed laser deposition

Cited by 16 publications

References 61 publications

Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

Thermal stability and thermal expansion behaviour of ZrO2/Y2O3 multilayers deposited by pulsed laser deposition technique

The synergetic enhancement of the porous ZrO2@TiO2 heterostructure and the plasmonic silver nanoparticles for efficient surface‐enhanced Raman scattering

Role of Exposure Atmospheres on Particle Coarsening and Phase Transformation of LiAlO2

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The synergetic enhancement of the porous ZrO₂@TiO₂ heterostructure and the plasmonic silver nanoparticles for efficient surface‐enhanced Raman scattering

Role of Exposure Atmospheres on Particle Coarsening and Phase Transformation of LiAlO₂