Category
Nanotechnology
All Nolege News articles on Nanotechnology.
8 articles
Nanotechnology
The label says 40 nm, your instrument says 180 nm, the microscope says 40 nm. All three are right
You cannot see a nanoparticle with light — the physics forbids it. So every number on a nanomaterial datasheet comes from an instrument that measures something adjacent to size and converts. Knowing what each one actually measures explains why they disagree, and which one to believe for your question.
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Nanotechnology
Two bottles both say 40 nm zinc oxide. They are not the same powder, and the reactor is why
Every nanomaterial datasheet describes what arrived. Almost none describes how it was made — and the synthesis route decides the size distribution, the defect count, the impurities and a price that can differ by four orders of magnitude for the same compound.
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Nanotechnology
Mineral sunscreen used to leave you grey. The chemistry did not change — the particle size did
Zinc oxide and titanium dioxide are the same two compounds in the white cricket-umpire nose paste and in a modern invisible sunscreen. What changed is how big the particles are — and that one variable controls the colour, the protection and most of the safety argument.
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Nanotechnology
A carbon nanotube is stronger than steel. A rope of them is not — and the reason is worth understanding
A single carbon nanotube is among the strongest things ever measured. Fibres spun from billions of them come in an order of magnitude weaker. The gap is not a manufacturing failure — it is physics, and it explains what nanotubes are actually good for today.
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Nanotechnology
Why materials behave differently at the nanoscale
Gold that is not gold-coloured, carbon stronger than steel, sunscreen that stops being white. At the nanoscale a material's properties stop depending only on what it is made of and start depending on how big it is. Here is why.
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Nanotechnology
Graphene, twenty years on: where the wonder material actually shows up
A single layer of carbon won a Nobel Prize and a decade of hype. Two decades later, where does graphene genuinely deliver — and where is it still catching up to the headlines?
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Nanotechnology
Quantum dots: the tiny crystals that won a Nobel and lit up your TV
Quantum dots are nanocrystals so small that their colour depends on their size. The idea earned the 2023 Nobel Prize in Chemistry — and it is already inside QLED televisions and medical imaging.
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Nanotechnology
Nanomedicine: how tiny carriers are learning to deliver drugs where they're needed
Nanomedicine packages drugs into carriers thousands of times smaller than a cell, aiming to hit diseased tissue while sparing the rest of the body. The COVID vaccines were its biggest proof yet.
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