News tagged with transmission electron microscopy

Why size matters for gold as a catalyst

Gold is the noblest metal—the most resistant to oxidation. However, nano-size gold has a unique ability to perform as a catalyst, even at low temperatures. The underlying mechanism for this size-dependent change in properties ...

dateSep 06, 2018 in Nanomaterials
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Sunscreen for dancing molecules

Since life is mostly based on water, our molecules are moving, vibrating and somersaulting in a liquid environment. But electron microscopy—a technique to study a static version of this nanoworld—has been almost impossible ...

dateAug 01, 2018 in Nanomaterials
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Real-time imaging of chemical processes

National University of Singapore scientists observe the real-time formation of hollow structures in the galvanic replacement (GR) reaction between silver and gold with nanometre resolution, gaining insights on the mechanisms ...

dateJul 24, 2018 in Materials Science
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Hope for new catalysts with high activity

Gold is a metal that is chemically inactive and does not corrode, but nanoporous gold (NPG), with its sponge-like structures, acts as a catalyst to promote chemical reactions such as carbon monoxide (CO) oxidation. Its mechanisms, ...

dateJul 02, 2018 in Materials Science
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