A5024901231- Metal-Organic Frameworks: Synthesis and Applications
- Ferroelectric and Piezoelectric Materials
- Innovative Energy Harvesting Technologies
- Advanced Sensor and Energy Harvesting Materials
- Dielectric properties of ceramics
- Diamond and Carbon-based Materials Research
- Machine Learning in Materials Science
- Microwave Dielectric Ceramics Synthesis
- Crystallization and Solubility Studies
- Catalytic Processes in Materials Science
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Dielectric materials and actuators
- Energy Harvesting in Wireless Networks
- Methane Hydrates and Related Phenomena
- Covalent Organic Framework Applications
- X-ray Diffraction in Crystallography
- Semiconductor materials and devices
- Advanced materials and composites
- Molecular Sensors and Ion Detection
- High-pressure geophysics and materials
- Metal and Thin Film Mechanics
- CO2 Reduction Techniques and Catalysts
- Inorganic Fluorides and Related Compounds
- Gas Sensing Nanomaterials and Sensors
The University of Texas at Dallas
2010-2018
We have designed and synthesized an isoreticular series of luminescent metal-organic frameworks (LMOFs) by incorporating a strongly emissive molecular fluorophore functionally diverse colinkers into Zn-based structures. The three-dimensional porous networks LMOF-261, -262, -263 represent unique/new type nets, classified as 2-nodal, (4,4)-c net (mot-e type) with 4-fold, class IIIa interpenetration. All compounds crystallize in body-centered tetragonal crystal system (space group I41/a). A...
Metal organic framework (MOF) materials in general, and MOF-74 particular, have promising properties for many technologically important processes. However, their instability under humid conditions severely restricts practical use. We show that this the accompanying reduction of CO$_2$ uptake capacity originate water dissociation reaction H$_2$O$\rightarrow$OH+H at metal centers. After dissociation, OH groups coordinate to centers, explaining MOF's capacity. This thus strongly depends on...
The effect of poling conditions on the power output piezoelectric energy harvesters using sol–gel based Pb(Zr<sub>0.53</sub>,Ti<sub>0.47</sub>)O<sub>3</sub>–Pb(Zn<sub>1/3</sub>,Nb<sub>2/3</sub>)O<sub>3</sub> thin-films has been investigated.
In this research, BiFeO3 (BFO) films are integrated into BFO/SrTiO3 (STO)/BFO nanolaminates (BSB-NLs) featuring nanometer-scale thickness of BFO and STO layers. By introducing the layer in between two layers, leakage current density is reduced by orders magnitude with respect to relatively high currents single i.e., from 10−5 A/cm2 10−7 A/cm2. The BSB-NL also shows very piezoelectric response, which ∼5 times higher than that pure same thickness. highly strained state layers concurrently...
We show that the water dissociation reaction H$_2$O$\rightarrow$OH+H in confined environment of MOF-74 channels can be precisely controlled by addition noble gas He. Elucidating entire process with ab initio methods and infrared (IR) spectroscopy, we prove interaction between molecules is critical to formation clusters, which reduce barrier up 37% thus influence significantly. Our time-resolved IR measurements confirm these clusters suppressed introducing He gas, providing unprecedented...
The confined porous environment of metal organic frameworks (MOFs) is an attractive system for studying reaction mechanisms. Compared to flat oxide surfaces, MOFs have the key advantage that they exhibit a well-defined structure and present significantly fewer challenges in experimental characterization. As example important reaction, we study here dissociation water—which plays critical role biology, chemistry, materials science—in show how knowledge this allows unprecedented level...
Once the water dissociation reaction takes place at metal centers, addition of 40 Torr CO 200 °C starts production formic acid <italic>via</italic> OH + H → HCO<sub>2</sub>H.
In the present study a complete analysis of morphological and electrical properties PZT layers with composition 53Zr-47Ti is presented. Three different samples composed 3, 6, 9 were analyzed on substrate consisting ZrO2-SiO2-Si structures. The ZrO2 deposited via Sol-Gel, whereas SiO2 layer, every sample, was PECVD. SEM results showed morphology very small granules 3 layered thin-film (12 nm), 6 mixture large size (100-300 nm) granule formation observed, exhibiting sizes (bigger than 300 nm)....
A complete analysis of the morphology, crystallographic orientation, and resulting electrical properties Pb(Zr 0.53 ,Ti 0.47 ) Pb(Nb 1/3 , Zn 2/3 )O 3 (PZT-PZN) thin films, as well behavior when integrated in a cantilever for energy harvesting applications, is presented. The PZT-PZN films were deposited using sol-gel methods. We report that 20% excess Pb, nucleation layer PbTiO (PT), fast ramp rate provides large grains, denser films. on stack TiO 2 /PECVD SiO /Si N 4 /thermal /Poly-Si/Si....