Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Chemical Engineering (26)
- Thin film (7)
- Hydrogen storage (5)
- High-throughput (3)
- Thin-film (3)
-
- Chemical interdiffusion (2)
- Coercive force (2)
- Combinatorial (2)
- Composition spreads (2)
- Crystal structure (2)
- Dielectric thin films (2)
- Epitaxy (2)
- Film (2)
- Iron (2)
- Magnetooptic kerr effect (2)
- Phase diagrams (2)
- Pulsed laser deposition (2)
- Raman spectroscopy (2)
- Sputter deposition (2)
- Thin films (2)
- X-ray diffraction (2)
- Alloys (1)
- Atmospheric temperature (1)
- BFO (1)
- Barium compounds (1)
- Bimetallic nanoparticles (1)
- Bond coats (1)
- Cell differentiation (1)
- Cell imaging (1)
- Cluster analysis (1)
- Publication
Articles 1 - 27 of 27
Full-Text Articles in Engineering
Magnetic Properties Of Crystals Of La5Mo4-XTXO16, S. Lofland, Jason Hattrick-Simpers, K. Ramanujachary, W. Mccarroll
Magnetic Properties Of Crystals Of La5Mo4-XTXO16, S. Lofland, Jason Hattrick-Simpers, K. Ramanujachary, W. Mccarroll
Jason R. Hattrick-Simpers
No abstract provided.
Data Management And Visualization Of X-Ray Diffraction Spectra From Thin Film Ternary Composition Spreads, I. Takeuchi, C. Long, O. Famodu, M. Murakami, Jason Hattrick-Simpers, G. Rubloff, M. Stukowski, K. Rajan
Data Management And Visualization Of X-Ray Diffraction Spectra From Thin Film Ternary Composition Spreads, I. Takeuchi, C. Long, O. Famodu, M. Murakami, Jason Hattrick-Simpers, G. Rubloff, M. Stukowski, K. Rajan
Jason R. Hattrick-Simpers
We discuss techniques for managing and visualizing x-ray diffraction spectrum data for thin film composition spreads which map large fractions of ternary compositional phase diagrams. An in-house x-ray microdiffractometer is used to obtain spectra from over 500 different compositions on an individual spread. The MATLAB software is used to quickly organize the data and create various plots from which one can quickly grasp different information regarding structural and phase changes across the composition spreads. Such exercises are valuable in rapidly assessing the “overall” picture of the structural evolution across phase diagrams before focusing in on specific composition regions for detailed …
Development Of Combined Optical Cell And Sieverts-Type Apparats For In-Situ Measurement Of Hydrogen Storage Materials, Chun Chiu, Jason Hattrick-Simpers, Edwin Heilweil, Leonid Bendersky
Development Of Combined Optical Cell And Sieverts-Type Apparats For In-Situ Measurement Of Hydrogen Storage Materials, Chun Chiu, Jason Hattrick-Simpers, Edwin Heilweil, Leonid Bendersky
Jason R. Hattrick-Simpers
No abstract provided.
Data Analysis In Combinatorial Experiments: Applying Supervised Principal Component Technique To Investigate The Relationship Between Tof-Sims Spectra And The Composition Distribution Of Ternary Metallic Alloy Thin Films, Rossana Dell'anna, Palo Lazzeri, Roberto Canteri, Christian Long, Jason Hattrick-Simpers, Ichiro Takeuchi, Mariano Anderle
Data Analysis In Combinatorial Experiments: Applying Supervised Principal Component Technique To Investigate The Relationship Between Tof-Sims Spectra And The Composition Distribution Of Ternary Metallic Alloy Thin Films, Rossana Dell'anna, Palo Lazzeri, Roberto Canteri, Christian Long, Jason Hattrick-Simpers, Ichiro Takeuchi, Mariano Anderle
Jason R. Hattrick-Simpers
No abstract provided.
The Effect Of Copt Crystallinity And Grain Texturing On Properties Of Exchange-Coupled Fe/Copt Systems, H. Oguchi, A. Zambano, M. Yu, Jason Hattrick-Simpers, D. Banerjee, Y. Liu, Z. Wang, J. Liu, S. Lofland, D. Josell, I. Takeuchi
The Effect Of Copt Crystallinity And Grain Texturing On Properties Of Exchange-Coupled Fe/Copt Systems, H. Oguchi, A. Zambano, M. Yu, Jason Hattrick-Simpers, D. Banerjee, Y. Liu, Z. Wang, J. Liu, S. Lofland, D. Josell, I. Takeuchi
Jason R. Hattrick-Simpers
The effect of the crystallinity and the grain texturing of CoPt hard layers on exchange coupled Fe/CoPt soft/hard magnetic systems was studied using gradient thickness multilayer thin films. We have studied the hard layer structures by transmission electron microscopy and x-ray diffraction, and characterized the exchange coupling interaction through magnetization loops obtained by the magneto-optical Kerr effect measurement. We found that exchange coupling strongly depends on the crystalline characteristics of the CoPt hard layer. There is correlation between the mixture of different grain orientations of the CoPt hard layer and coupling efficiency. In particular, interlayer coupling is enhanced when there …
Phase Transformation In An Yttrium-Hydrogen System Studied By Tem, K. Wang, Jason Hattrick-Simpers, L. Bendersky
Phase Transformation In An Yttrium-Hydrogen System Studied By Tem, K. Wang, Jason Hattrick-Simpers, L. Bendersky
Jason R. Hattrick-Simpers
No abstract provided.
Rapid Structural Mapping Of Ternary Metallic Alloy Systems Using The Combinatorial Approach And Cluster Analysis, C. Long, Jason Hattrick-Simpers, M. Murakami, R. Srivastava, I. Takeuchi, V. Karen, X. Li
Rapid Structural Mapping Of Ternary Metallic Alloy Systems Using The Combinatorial Approach And Cluster Analysis, C. Long, Jason Hattrick-Simpers, M. Murakami, R. Srivastava, I. Takeuchi, V. Karen, X. Li
Jason R. Hattrick-Simpers
We are developing a procedure for the quick identification of structural phases in thin film composition spread experiments which map large fractions of compositional phase diagrams of ternary metallic alloy systems. An in-house scanning x-ray microdiffractometer is used to obtain x-ray spectra from 273 different compositions on a single composition spread library. A cluster analysissoftware is then used to sort the spectra into groups in order to rapidly discover the distribution of phases on the ternary diagram. The most representative pattern of each group is then compared to a database of known structures to identify known phases. Using this method, …
Fabrication And Characterization Of In-Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, Jason Hattrick-Simpers, S. Lofland, I. Takeuchi, C. Lu, L. Bendersky, H. Chang
Fabrication And Characterization Of In-Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, Jason Hattrick-Simpers, S. Lofland, I. Takeuchi, C. Lu, L. Bendersky, H. Chang
Jason R. Hattrick-Simpers
No abstract provided.
Raman Spectroscopic Observation Of Dehydration In Ball-Milled Linh2-Libh4-Mgh2 Nanoparticles, Jason Hattrick-Simpers, James Maslar, Michael Niemann, Chun Chiu, Sesha Srinivasan, Elias Stefanakos, Leonid Bendersky
Raman Spectroscopic Observation Of Dehydration In Ball-Milled Linh2-Libh4-Mgh2 Nanoparticles, Jason Hattrick-Simpers, James Maslar, Michael Niemann, Chun Chiu, Sesha Srinivasan, Elias Stefanakos, Leonid Bendersky
Jason R. Hattrick-Simpers
No abstract provided.
Combinatorial Study Of Ni-Ti-Pt Ternary Metal Gate Electrodes On Hfo2 For The Advanced Gate Stack, K.-S. Chang, M. Green, J. Suehle, E. Vogel, H. Xiong, Jason Hattrick-Simpers, I. Takeuchi, O. Famodu, K. Ohmori, P. Ahmet, T. Chikyow, P. Majhi, B.-H. Lee, M. Gardner
Combinatorial Study Of Ni-Ti-Pt Ternary Metal Gate Electrodes On Hfo2 For The Advanced Gate Stack, K.-S. Chang, M. Green, J. Suehle, E. Vogel, H. Xiong, Jason Hattrick-Simpers, I. Takeuchi, O. Famodu, K. Ohmori, P. Ahmet, T. Chikyow, P. Majhi, B.-H. Lee, M. Gardner
Jason R. Hattrick-Simpers
The authors have fabricated combinatorial Ni–Ti–Pt ternary metal gate thin film libraries on HfO2 using magnetron co-sputtering to investigate flatband voltage shift (ΔVfb) , work function (Φm) , and leakage current density (JL) variations. A more negative ΔVfb is observed close to the Ti-rich corner than at the Ni- and Pt-rich corners, implying smaller Φm near the Ti-rich corners and higher Φm near the Ni- and Pt-rich corners. In addition, measured JL values can be explained consistently with the observed Φm variations. Combinatorial methodologies prove to be useful in surveying the large compositional space of ternary alloymetal gate electrode systems.
Interphase Exchange Coupling In Fe/Sm-Co Bilayers With Gradient Fe Thickness, Ming-Hui Yu, Jason Hattrick-Simpers, Ichiro Takeuchi, Jing Li, Z. Wang, J. Liu, S. Lofland, Somdev Tyagi, J. Freeland, D. Giubertoni, M. Bersani, M. Anderle
Interphase Exchange Coupling In Fe/Sm-Co Bilayers With Gradient Fe Thickness, Ming-Hui Yu, Jason Hattrick-Simpers, Ichiro Takeuchi, Jing Li, Z. Wang, J. Liu, S. Lofland, Somdev Tyagi, J. Freeland, D. Giubertoni, M. Bersani, M. Anderle
Jason R. Hattrick-Simpers
We have fabricated Fe∕Sm–Co bilayers with gradient Fe thicknesses in order to systematically study the dependence of exchange coupling on the thickness of the Fe layer. The Fe layer was deposited at two different temperatures (150 and 300°C) to study the effect of deposition temperature on the exchange coupling. Magneto-optical Kerr effect and x-ray magnetic circular dichroism (XMCD) have been employed as nondestructive rapid characterization tools to map the magnetic properties of the gradient samples. Systematic enhancement in exchange coupling between the soft layer and the hard layer is observed as the soft layer thickness is decreased. Separate exchange couplings …
High-Throughput Characterization Of Shape Memory Thin Films Using Automated Temperature-Dependent Resistance Measurements, Sigurd Thienhaus, Christiane Zamponi, Holger Rumpf, Jason Hattrick-Simpers, Ichiro Takeuchi, Alfred Ludwig
High-Throughput Characterization Of Shape Memory Thin Films Using Automated Temperature-Dependent Resistance Measurements, Sigurd Thienhaus, Christiane Zamponi, Holger Rumpf, Jason Hattrick-Simpers, Ichiro Takeuchi, Alfred Ludwig
Jason R. Hattrick-Simpers
No abstract provided.
A Semi-Empirical Model For Tilted-Gun Planar Magnetron Sputtering Accounting For Chimney Shadowing, Johnathan Bunn, C. Metting, Jason Hattrick-Simpers
A Semi-Empirical Model For Tilted-Gun Planar Magnetron Sputtering Accounting For Chimney Shadowing, Johnathan Bunn, C. Metting, Jason Hattrick-Simpers
Jason R. Hattrick-Simpers
No abstract provided.
Note: A Simple Thermal Gradient Annealing Unit For The Treatment Of Thin Films, C. Metting, Johnathan Bunn, Ellen Underwood, Yihao Zhu, G. Koley, T. Crawford, Jason Hattrick-Simpers
Note: A Simple Thermal Gradient Annealing Unit For The Treatment Of Thin Films, C. Metting, Johnathan Bunn, Ellen Underwood, Yihao Zhu, G. Koley, T. Crawford, Jason Hattrick-Simpers
Jason R. Hattrick-Simpers
A gradient annealing cell has been developed for the high-throughput study of thermalannealing effects on thin-film libraries in different environments. The inexpensive gradientannealing unit permits temperature gradients as large as 28 °C/mm and can accommodate samples ranging in length from 13 mm to 51 mm. The system was validated by investigating the effects of annealing temperature on the crystallinity, resistivity, and transparency of tin-doped indium oxide deposited on a glass substrate by magnetron sputtering. The unit developed in this work will permit the rapid optimization of materials properties such as crystallinity, homogeneity, and conductivity across a variety of applications.
Combinatorial Approach To Turbine Bond Coat Discovery, Christopher Metting, Johnathan Bunn, Ellen Underwood, Stephen Smoak, Jason Hattrick-Simpers
Combinatorial Approach To Turbine Bond Coat Discovery, Christopher Metting, Johnathan Bunn, Ellen Underwood, Stephen Smoak, Jason Hattrick-Simpers
Jason R. Hattrick-Simpers
No abstract provided.
Exploration Of Magnetoelectric Thin-Film Sensors Using Supperlattice Composition Spreads, K.-S. Chang, M. Aronova, C. Gao, C. Lin, Jason Hattrick-Simpers, M. Murakami, I. Takeuchi
Exploration Of Magnetoelectric Thin-Film Sensors Using Supperlattice Composition Spreads, K.-S. Chang, M. Aronova, C. Gao, C. Lin, Jason Hattrick-Simpers, M. Murakami, I. Takeuchi
Jason R. Hattrick-Simpers
No abstract provided.
Combinatorial Investigation Of Ferromagnetic Shape-Memory Alloys In The Ni-Mn-Al Ternary System Using A Composition Spread Technique, Olugbenga Famodu, Jason Hattrick-Simpers, Maria Aronova, Kao-Shou Chang, Makoto Murakami, Manfred Wuttig, Teiko Okazaki, Yasubumi Furuya, Lee Knauss, Leonid Bendersky, Frank Biaricaniello, Ichiro Takeuchi
Combinatorial Investigation Of Ferromagnetic Shape-Memory Alloys In The Ni-Mn-Al Ternary System Using A Composition Spread Technique, Olugbenga Famodu, Jason Hattrick-Simpers, Maria Aronova, Kao-Shou Chang, Makoto Murakami, Manfred Wuttig, Teiko Okazaki, Yasubumi Furuya, Lee Knauss, Leonid Bendersky, Frank Biaricaniello, Ichiro Takeuchi
Jason R. Hattrick-Simpers
No abstract provided.
Characterization Of Magnetic Degradation Mechanism In A High Neutron-Flux Environment, Adib Samin, Jie Qiu, Jason Hattrick-Simpers, Liyang Dai-Hattrick, Yuan Zheng, Lei Cao
Characterization Of Magnetic Degradation Mechanism In A High Neutron-Flux Environment, Adib Samin, Jie Qiu, Jason Hattrick-Simpers, Liyang Dai-Hattrick, Yuan Zheng, Lei Cao
Jason R. Hattrick-Simpers
No abstract provided.
Combinatorial Study Of Thin Film Metal Hydride By Prompt Gamma Activation Analysis, L. Cao, Jason Hattrick-Simpers, R. Bindel, R. Bindel, B. Tomlin, R. Zeisler, R. Paul, L. Bendersky, R. Downing
Combinatorial Study Of Thin Film Metal Hydride By Prompt Gamma Activation Analysis, L. Cao, Jason Hattrick-Simpers, R. Bindel, R. Bindel, B. Tomlin, R. Zeisler, R. Paul, L. Bendersky, R. Downing
Jason R. Hattrick-Simpers
No abstract provided.
Combinatorial Search Of Thermoelastic Shape-Memory Alloys With Extremely Small Hysteresis Width, Jun Cui, Yong Chu, Olugbenga Famodu, Yasubumi Furuya, Jason Hattrick-Simpers, Richard James, Alfred Ludwig, Sigurd Thienhaus, Manfred Wuttig, Zhiyong Zhang, Ichiro Takeuchi
Combinatorial Search Of Thermoelastic Shape-Memory Alloys With Extremely Small Hysteresis Width, Jun Cui, Yong Chu, Olugbenga Famodu, Yasubumi Furuya, Jason Hattrick-Simpers, Richard James, Alfred Ludwig, Sigurd Thienhaus, Manfred Wuttig, Zhiyong Zhang, Ichiro Takeuchi
Jason R. Hattrick-Simpers
No abstract provided.
Enhanced Dielectric Properties In Single Crystal-Like Bifeo3 Thin Films Grown By Flux-Mediated Epitaxy, S.-H. Lim, M. Murakami, J. Yang, S.-Y. Young, Jason Hattrick-Simpers, M. Wuttig, L. Salamanca-Riba, I. Takeuchi
Enhanced Dielectric Properties In Single Crystal-Like Bifeo3 Thin Films Grown By Flux-Mediated Epitaxy, S.-H. Lim, M. Murakami, J. Yang, S.-Y. Young, Jason Hattrick-Simpers, M. Wuttig, L. Salamanca-Riba, I. Takeuchi
Jason R. Hattrick-Simpers
We have fabricated single crystal-like BiFeO3 (BFO) thin films by flux-mediated epitaxy using pulsed laser deposition(PLD). The Bi–Cu–O flux composition and its thickness were optimized using composition spread, thickness gradient, and temperature gradient libraries. The optimized BFO thin films grown with this technique showed larger grain size of ∼2μm and higher dielectric constant in the range of 260–340 than those for standard PLD grown films. In addition, the leakage current density of the films was reduced by two orders of magnitude compared to that of standard PLD grown films.
Optical Cell For Combinatorial In Situ Raman Spectroscopic Measurements Of Hydrogen Storage Materials At High Pressures And Temperatures, Jason Hattrick-Simpers, Wilbur Hurst, Sesha Srinivasan, James Maslar
Optical Cell For Combinatorial In Situ Raman Spectroscopic Measurements Of Hydrogen Storage Materials At High Pressures And Temperatures, Jason Hattrick-Simpers, Wilbur Hurst, Sesha Srinivasan, James Maslar
Jason R. Hattrick-Simpers
An optical cell is described for high-throughput backscattering Raman spectroscopic measurements of hydrogen storagematerials at pressures up to 10 MPa and temperatures up to 823 K. High throughput is obtained by employing a 60 mm diameter × 9 mm thick sapphire window, with a corresponding 50 mm diameter unobstructed optical aperture. To reproducibly seal this relatively large window to the cell body at elevated temperatures and pressures, a gold o-ring is employed. The sample holder-to-window distance is adjustable, making this cell design compatible with optical measurement systems incorporating lenses of significantly different focal lengths, e.g., microscope objectives and single element …
Synthesis Of Mono-Disperse Cofe Alloy Nanoparticles With High Activity Toward Nabh4 Hydrolysis, Cun Wen, Xin Zhang, Samuel Lofland, Jochen Lauterbach, Jason Hattrick-Simpers
Synthesis Of Mono-Disperse Cofe Alloy Nanoparticles With High Activity Toward Nabh4 Hydrolysis, Cun Wen, Xin Zhang, Samuel Lofland, Jochen Lauterbach, Jason Hattrick-Simpers
Jason R. Hattrick-Simpers
No abstract provided.
A Combinatorial Characterization Scheme For High-Throughput Investigations Of Hydrogen Storage Materials, Jason Hattrick-Simpers, Zhuopeng Tan, Hiroyuki Oguchi, Chun Chiu, Edwin Heilweil, James Maslar, Leonid Bendersky
A Combinatorial Characterization Scheme For High-Throughput Investigations Of Hydrogen Storage Materials, Jason Hattrick-Simpers, Zhuopeng Tan, Hiroyuki Oguchi, Chun Chiu, Edwin Heilweil, James Maslar, Leonid Bendersky
Jason R. Hattrick-Simpers
No abstract provided.
An Infrared Imaging Method For High-Throughput Combinatorial Investigation Of Hydrogenation-Dehydrogenation And New Phase Formation Of Thin Films, H. Oguchi, Jason Hattrick-Simpers, I. Takeuchi, E. Heilweil, L. Bendersky
An Infrared Imaging Method For High-Throughput Combinatorial Investigation Of Hydrogenation-Dehydrogenation And New Phase Formation Of Thin Films, H. Oguchi, Jason Hattrick-Simpers, I. Takeuchi, E. Heilweil, L. Bendersky
Jason R. Hattrick-Simpers
We have developed an infrared imaging setup enabling in situ infrared images to be acquired, and expanded on capabilities of an infrared imaging as a high-throughput screening technique, determination of a critical thickness of a Pd capping layer which significantly blocks infrared emission from below, enhancement of sensitivity to hydrogenation and dehydrogenation by normalizing raw infrared intensity of a Mg thin film to an inert reference, rapid and systematic screening of hydrogenation and dehydrogenation properties of a Mg–Ni composition spread covered by a thickness gradient Pd capping layer, and detection of formation of a Mg2Si phase in a Mg thin …
Multimode Quantitative Scanning Microwave Microscopy Of In Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, I. Takeuchi, S. Lofland, Jason Hattrick-Simpers, H. Chang
Multimode Quantitative Scanning Microwave Microscopy Of In Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, I. Takeuchi, S. Lofland, Jason Hattrick-Simpers, H. Chang
Jason R. Hattrick-Simpers
We have performed variable-temperature multimode quantitative microwavemicroscopy of in situepitaxial Ba1−xSrxTiO3 thin-film composition spreads fabricated on (100) LaA1O3 substrates. Dielectric properties were mapped as a function of continuously varying composition from BaTiO3 to SrTiO3. We have demonstrated nondestructive temperature-dependent dielectric characterization of local thin-film regions. Measurements are simultaneously taken at multiple resonant frequencies of the microscope cavity. The multimode measurements allow frequency dispersion studies. We observe strong composition-dependent dielectric relaxation in Ba1−xSrxTiO3 at microwave frequencies.
Nanoparticles For Stem-Cell Engineering, Esmaiel Jabbari
Nanoparticles For Stem-Cell Engineering, Esmaiel Jabbari
Esmaiel Jabbari
No abstract provided.