The neutrons are shot between two parallel plates, one above another and separated by about 25 micrometres - half a hair's width.
One side of the silicon can then be etched down to within a fraction of a hair's width of the glass layer, leaving the other side as a support.
The N95 blocks 95% of particles bigger than 0.3 microns, or one-three-hundredth the width of a human hair.
During the 1970s they squeezed a stream of digital information into a fiber optic wire the width of a human hair.
The bottom layer has hundreds or thousands of tiny intersecting liquid-handling channels, each about the width of a human hair (100 microns).
Microprocessors in your PC, Mac or BlackBerry can pack more than 1, 000 transistors into a space the width of a human hair.
Chipmakers are getting on board now that wafer-circuitry has narrowed below 90 nanometers, or one one-thousandth the width of a human hair.
In the mid-1980s the smallest features on chips were 1 or 2 microns wide, about one-hundredth the width of a human hair.
These channels, which have a diameter of 50 microns (about the width of a human hair) are etched using standard silicon-fabrication methods.
Wizards at Lucent and Nortel can zap--in one second--6 trillion bits of information down a fiber strand the width of a human hair.
Gold flecks are durable enough to carry a large amount of a given drug, and 5, 000 flecks can fit on the width of a human hair.
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The sand will be severely shaken and sieved to make sure only fine-grained material, less than the width of a human hair in diameter, reaches the instruments.
Lastly, the week saw the unveiling of the world's first fiber-optic solar cell, which is thinner than the width of a human hair and could pave the way to creating energy-producing clothes.
The secret to the screens is in what's behind them: a thin strip of metal-coated plastic that's only 50 microns thick -- about half the width of a human hair -- and wraps around a spool.
Cells are lined up like ants and passed one-by-one through a tiny fluid channel one-fourth the width of a human hair, and a digital camera sensor chip captures images of the cells as they pass over an array of nanoscale holes.
Cells are lined up like ants and passed one by one through a tiny fluid channel one-fourth the width of a human hair, and a digital camera sensor chip captures images of the cells as they pass over an array of nanoscale holes.
It's the manipulation of manufactured materials measuring less than 100 nanometers, or a thousandth the width of a strand of hair.
That means separating the unwanted coarse outer hair of the goats from the valuable ultrafine cashmere underfleece, which measures just 12 to 18 microns in width (one sheep wool fiber is more like 25 microns wide).
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