Results 231 to 240 of about 1,976,780 (394)

A Two‐Step Annealing Treatment Method for InAlZnO Transistors Toward 3D Integration

open access: yesAdvanced Electronic Materials, EarlyView.
A two‐step annealing treatment is proposed to enhance the performance of the InAlZnO (IAZO) transistors, where the devices are initially pre‐annealing at 400 °C, followed by a second annealing step across a wide temperature range of 200–500 °C. This method results in IAZO transistors with excellent electrical properties, superior positive and negative ...
Jingye Xie   +4 more
wiley   +1 more source

Impact of Transition Metals and Electrocatalyst Layer Thickness on the Pt‐Based Cathodes of Proton Exchange Membrane Fuel Cells – Do Multimetallic Electrocatalysts Necessarily Yield an Improved Performance?

open access: yesAdvanced Energy Materials, EarlyView.
Nonnoble transition‐metals (TMs) in PtCuNi/C catalysts have a dual influence in proton‐exchange membrane fuel cell cathode catalyst layer. While TMs act as a “sacrificial component” of PtCuNi/C, inhibiting Pt dissolution from the PtMx nanoparticles bearing the active sites, they promote the formation of separate catalysts and ionomer domains in the ...
Ricardo Sgarbi   +16 more
wiley   +1 more source

Interior Morphology and Pore Structure in High Surface Area Carbon Catalyst Supports

open access: yesAdvanced Energy Materials, EarlyView.
The interior structure of high surface area carbon supports for proton exchange membrane fuel cells is a major yet poorly characterized factor influencing performance and durability. Using full‐range electron tomography, pores and pathways within the supports are visualized in 3D.
Robin Girod, Vasiliki Tileli
wiley   +1 more source

Increasing sedentary time, minimum dietary energy requirements, and food security assessment

open access: yesApplied Economic Perspectives and Policy, EarlyView.
Abstract We compute corrections for sedentary behavior in physical activity levels (PALs) and incorporate them along with corrections for over estimation of basal metabolic rates (BMRs) into threshold caloric intakes, known as minimum dietary energy requirements (MDERs).
Jacob Michels   +2 more
wiley   +1 more source

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