Search results for: I. Frenkel

Items from 1 to 20 out of 121 results

article

Infant sensitivity to social contingency moderates the predictive link between early maternal reciprocity and infants' emerging social behavior

Yael Paz, Tahl I. Frenkel

Developmental Science > 27 > 6 > n/a - n/a

The scientific study of love underscores the importance of dyadic reciprocity in laying the foundation for infants’ social development. While research establishes links between early reciprocity and children's social capacities, some infants appear to benefit from reciprocity more than others. A central feature of reciprocity is its contingent structure, that is, the extent to which maternal behaviors...

article

Probing Basal and Prismatic Planes of Graphitic Materials for Metal Single Atom and Subnanometer Cluster Stabilization

Mathieu Vidal, Jyoti Pandey, Javier Navarro‐Ruiz, Joris Langlois, more

Chemistry – A European Journal > 30 > 50 > n/a - n/a

Supported metal single atom catalysis is a dynamic research area in catalysis science combining the advantages of homogeneous and heterogeneous catalysis. Understanding the interactions between metal single atoms and the support constitutes a challenge facing the development of such catalysts, since these interactions are essential in optimizing the catalytic performance. For conventional carbon supports,...

article

Iterative Bragg peak removal on X‐ray absorption spectra with automatic intensity correction

Ryuichi Shimogawa, Nicholas Marcella, Christopher R. O'Connor, Taek-Seung Kim, more

Journal of Synchrotron Radiation > 31 > 3 > 456 - 463

This study introduces a novel iterative Bragg peak removal with automatic intensity correction (IBR‐AIC) methodology for X‐ray absorption spectroscopy (XAS), specifically addressing the challenge of Bragg peak interference in the analysis of crystalline materials. The approach integrates experimental adjustments and sophisticated post‐processing, including an iterative algorithm for robust calculation...

article

Migration and Precipitation of Platinum in Anion‐Exchange Membrane Fuel Cells

Aniket Raut, Haoyan Fang, Yu‐Chung Lin, Shi Fu, more

Angewandte Chemie International Edition > 62 > 37 > n/a - n/a

Despite the recent progress in increasing the power generation of Anion‐exchange membrane fuel cells (AEMFCs), their durability is still far lower than that of Proton exchange membrane fuel cells (PEMFCs). Using the complementary techniques of X‐ray micro‐computed tomography (CT), Scanning Electron Microscopy (SEM) and Energy Dispersive X‐ray (EDX) spectroscopy, we have identified Pt ion migration...

article

Migration and Precipitation of Platinum in Anion‐Exchange Membrane Fuel Cells

Aniket Raut, Haoyan Fang, Yu‐Chung Lin, Shi Fu, more

Angewandte Chemie > 135 > 37 > n/a - n/a

article

Persistent symptoms of maternal post‐traumatic stress following childbirth across the first months postpartum: Associations with perturbations in maternal behavior and infant avoidance of social gaze toward mother

Sofie Rousseau, Tamar Feldman, Inbal Shlomi Polachek, Tahl I. Frenkel

Infancy > 28 > 5 > 882 - 909

Recent literature identifies childbirth as a potentially traumatic event, following which mothers may develop symptoms of Post‐Traumatic‐Stress‐Following‐Childbirth (PTS‐FC). The current study examines whether stable symptoms of PTS‐FC during the early postpartum period may impose risk for perturbations in maternal behavior and infant social‐engagement with mother, controlling for comorbid postpartum...

article

Zn‐Doped P‐Type InAs Nanocrystal Quantum Dots

Lior Asor, Jing Liu, Shuting Xiang, Nir Tessler, more

Advanced Materials > 35 > 5 > n/a - n/a

Doped heavy metal‐free III–V semiconductor nanocrystal quantum dots (QDs) are of great interest both from the fundamental aspects of doping in highly confined structures, and from the applicative side of utilizing such building blocks in the fabrication of p–n homojunction devices. InAs nanocrystals (NCs), that are of particular relevance for short‐wave IR detection and emission applications, manifest...

article

Comparative analysis of XANES and EXAFS for local structural characterization of disordered metal oxides

Junying Li, Yuanyuan Li, Prahlad K. Routh, Evgeniy Makagon, more

Journal of Synchrotron Radiation > 28 > 5 > 1511 - 1517

In functional materials, the local environment around active species that may contain just a few nearest‐neighboring atomic shells often changes in response to external conditions. Strong disorder in the local environment poses a challenge to commonly used extended X‐ray absorption fine structure (EXAFS) analysis. Furthermore, the dilute concentrations of absorbing atoms, small sample size and the...

article

InAs Nanocrystals with Robust p‐Type Doping

Lior Asor, Jing Liu, Yonatan Ossia, Durgesh C. Tripathi, more

Advanced Functional Materials > 31 > 6 > n/a - n/a

Robust control over the carrier type is fundamental for the fabrication of nanocrystal‐based optoelectronic devices, such as the p–n homojunction, but effective incorporation of impurities in semiconductor nanocrystals and its characterization is highly challenging due to their small size. Herein, InAs nanocrystals (NCs), post‐synthetically doped with Cd, serve as a model system for successful p‐type...

article

All‐Solid‐State Electro‐Chemo‐Mechanical Actuator Operating at Room Temperature

Evgeniy Makagon, Ellen Wachtel, Lothar Houben, Sidney R. Cohen, more

Advanced Functional Materials > 31 > 3 > n/a - n/a

Dimensional change in a solid due to electrochemically driven compositional change is termed electro‐chemo‐mechanical (ECM) coupling. This effect causes mechanical instability in Li‐ion batteries and solid oxide fuel cells. Nevertheless, it can generate considerable force and deformation, making it attractive for mechanical actuation. Here a Si‐compatible ECM actuator in the form of a 2 mm diameter...

article

Ethylene Dehydroaromatization over Ga‐ZSM‐5 Catalysts: Nature and Role of Gallium Speciation

Yunwen Zhou, Hari Thirumalai, Scott K. Smith, Kenton H. Whitmire, more

Angewandte Chemie > 132 > 44 > 19760 - 19769

Bifunctional catalysis in zeolites possessing both Brønsted and Lewis acid sites offers unique opportunities to tailor shape selectivity and enhance catalyst performance. Here, we examine the impact of framework and extra‐framework gallium species on enriched aromatics production in zeolite ZSM‐5. We compare three distinct methods of preparing Ga‐ZSM‐5 and reveal direct (single step) synthesis leads...

article

Ethylene Dehydroaromatization over Ga‐ZSM‐5 Catalysts: Nature and Role of Gallium Speciation

Yunwen Zhou, Hari Thirumalai, Scott K. Smith, Kenton H. Whitmire, more

Angewandte Chemie International Edition > 59 > 44 > 19592 - 19601

article

The association between mothers’ and daughters’ positive affect is moderated by child cardiac vagal regulation

Sofie Rousseau, Lior Kritzman, Tahl I. Frenkel, Nava Levit‐Binnun, more

Developmental Psychobiology > 62 > 6 > 804 - 815

Introduction Extensive research has supported the importance of children's positive affect in fostering prosperous psychosocial adjustment. Children's positive affect is believed to be significantly shaped by their environment in general and their caregivers’ positive affect in particular. The current study investigates the role of child cardiac vagal regulation, a psychophysiological marker for...

article

Photo–thermo Catalytic Oxidation over a TiO₂‐WO₃‐Supported Platinum Catalyst

Leilei Kang, Xiao Yan Liu, Aiqin Wang, Lin Li, more

Angewandte Chemie > 132 > 31 > 13009 - 13016

Photo–thermo catalysis, which integrates photocatalysis on semiconductors with thermocatalysis on supported nonplasmonic metals, has emerged as an attractive approach to improve catalytic performance. However, an understanding of the mechanisms in operation is missing from both the thermo‐ and photocatalytic perspectives. Deep insights into photo–thermo catalysis are achieved via the catalytic oxidation...

article

Photo–thermo Catalytic Oxidation over a TiO₂‐WO₃‐Supported Platinum Catalyst

Leilei Kang, Xiao Yan Liu, Aiqin Wang, Lin Li, more

Angewandte Chemie International Edition > 59 > 31 > 12909 - 12916

article

Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal–Organic Frameworks

Deependra M. Shakya, Otega A. Ejegbavwo, Thayalan Rajeshkumar, Sanjaya D. Senanayake, more

Angewandte Chemie > 131 > 46 > 16685 - 16689

We report the first study of a gas‐phase reaction catalyzed by highly dispersed sites at the metal nodes of a crystalline metal–organic framework (MOF). Specifically, CuRhBTC (BTC³⁻=benzenetricarboxylate) exhibited hydrogenation activity, while other isostructural monometallic and bimetallic MOFs did not. Our multi‐technique characterization identifies the oxidation state of Rh in CuRhBTC as +2, which...

article

Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal–Organic Frameworks

Deependra M. Shakya, Otega A. Ejegbavwo, Thayalan Rajeshkumar, Sanjaya D. Senanayake, more

Angewandte Chemie International Edition > 58 > 46 > 16533 - 16537

article

Compositional control of radionuclide retention in hollandite‐based ceramic waste forms for Cs‐immobilization

Mingyang Zhao, Yun Xu, Lindsay Shuller‐Nickles, Jake Amoroso, more

Journal of the American Ceramic Society > 102 > 7 > 4314 - 4324

Hollandite materials, as a class of crystalline nuclear waste forms, are promising candidates for the immobilization of radioactive elements, such as Cs, Ba, as well as a variety of lanthanide and transition‐metal fission products. In this study, three Ga‐doped titanate hollandite‐type phases, Ba_1.33Ga_2.67Ti_5.33O₁₆, Ba_0.667Cs_0.667Ga₂Ti₆O₁₆, and Cs_1.33Ga_1.33Ti_6.67O₁₆, were synthesized using a solid‐state...

article

Highly active subnanometer Rh clusters derived from Rh-doped SrTiO3 for CO2 reduction

Binhang Yan, Qiyuan Wu, Jiajie Cen, Janis Timoshenko, more

Applied Catalysis B: Environmental > 2018 > 237 > C > 1003-1011

Sub-nanometer Rh clusters derived from Rh-doped SrTiO₃, demonstrated by in-situ X-ray Diffraction (XRD) and X-ray Absorption Fine Structure (XAFS) measurements, are applied as highly active catalysts for CO₂ reduction. Compared to the supported Rh/SrTiO₃, the catalyst synthesized by a doping-segregation method exhibits a higher space-time yield (STY) to CO with a selectivity of 95% for CO₂ reduction...

article

Anelastic and Electromechanical Properties of Doped and Reduced Ceria

Ellen Wachtel, Anatoly I. Frenkel, Igor Lubomirsky

Advanced Materials > 30 > 41 > n/a - n/a

Room‐temperature mechanical properties of thin films and ceramics of doped and undoped ceria are reviewed with an emphasis on the anelastic behavior of the material. Notably, the unrelaxed Young's modulus of Gd‐doped ceria ceramics measured by ultrasonic pulse‐echo techniques is >200 GPa, while the relaxed biaxial modulus, calculated from the stress/strain ratio of thin films, is ≈10 times smaller...

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Search results for: I. Frenkel

Infant sensitivity to social contingency moderates the predictive link between early maternal reciprocity and infants' emerging social behavior

Probing Basal and Prismatic Planes of Graphitic Materials for Metal Single Atom and Subnanometer Cluster Stabilization

Iterative Bragg peak removal on X‐ray absorption spectra with automatic intensity correction

Migration and Precipitation of Platinum in Anion‐Exchange Membrane Fuel Cells

Migration and Precipitation of Platinum in Anion‐Exchange Membrane Fuel Cells

Persistent symptoms of maternal post‐traumatic stress following childbirth across the first months postpartum: Associations with perturbations in maternal behavior and infant avoidance of social gaze toward mother

Zn‐Doped P‐Type InAs Nanocrystal Quantum Dots

Comparative analysis of XANES and EXAFS for local structural characterization of disordered metal oxides

InAs Nanocrystals with Robust p‐Type Doping

All‐Solid‐State Electro‐Chemo‐Mechanical Actuator Operating at Room Temperature

Ethylene Dehydroaromatization over Ga‐ZSM‐5 Catalysts: Nature and Role of Gallium Speciation

Ethylene Dehydroaromatization over Ga‐ZSM‐5 Catalysts: Nature and Role of Gallium Speciation

The association between mothers’ and daughters’ positive affect is moderated by child cardiac vagal regulation

Photo–thermo Catalytic Oxidation over a TiO₂‐WO₃‐Supported Platinum Catalyst

Photo–thermo Catalytic Oxidation over a TiO₂‐WO₃‐Supported Platinum Catalyst

Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal–Organic Frameworks

Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal–Organic Frameworks

Compositional control of radionuclide retention in hollandite‐based ceramic waste forms for Cs‐immobilization

Highly active subnanometer Rh clusters derived from Rh-doped SrTiO3 for CO2 reduction

Anelastic and Electromechanical Properties of Doped and Reduced Ceria

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