Woojun Choi

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Copper electrocatalysts can reduce CO2 to hydrocarbons at high overpotentials. However, a mechanistic understanding of CO2 reduction on nanostructured Cu catalysts has been lacking. Herein we show that the structurally precise ligand-protected Cu-hydride nanoclusters, such as Cu32H20L12 (L is a dithiophosphate ligand), offer unique selectivity for(More)
This paper describes an all-CMOS embedded temperature sensor that directly controls the self-refresh period of a 25nm mobile DRAM. It occupies 0.02mm<sup>2</sup>, and achieves 0.04&#x00B0;C resolution and &#x00B1;2&#x00B0;C accuracy from 20&#x00B0;C to 95&#x00B0;C after a single temperature trim. This performance is enabled by the use of dynamic threshold(More)
The theoretically predicted volcano plot for hydrogen production shows the best catalyst as the one that ensures that the hydrogen binding step is thermodynamically neutral. However, the experimental realization of this concept has suffered from the inherent surface heterogeneity of solid catalysts. It is even more challenging for molecular catalysts(More)
Mobile DRAMs are essential to support memory-intensive operations for smartphones and tablet PCs [1, 2]. Since mobile DRAM standard (LPDDR), for the next generation, targets the speed specification of 51.2GB/s, its I/O interface demands high bandwidth, low power and high efficiency. Single-ended signaling has been used for LPDDR interfaces due to 100% pin(More)
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