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3 results for “nanogold applications” in Science
Science · 8 August 2026
The Metal That Went Medical
…iol surface chemistry make it unusually easy to attach biological molecules to. · Medical nanogold consumes a trivial share of global supply — the value is in the surface chemistry, not the mass of metal. · Why is colloidal gold red instead of gold-coloured? Because at nanometre…
Amara Okonjo · 15 min read
Science · 9 August 2026
The Metallurgy of Karat
Pure gold is too soft to hold a stone, too soft to hold an edge, and the wrong colour for half the world's taste. Almost everything you own that is gold is a designed alloy — and the design is where t…
Tomas Herrera · 16 min read
Science · 10 August 2026
Where Gold Actually Comes From
Every gram of gold on Earth was manufactured in an astrophysical catastrophe, arrived here after the planet had already formed, and was then concentrated by hot water. Three separate accidents, none o…
Tomas Herrera · 18 min read
