Goblet - Romans Used Nanotechnology

1,600-Year-Old Goblet Shows that the Romans Used Nanotechnology

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The Lycurgus Cup, as it is known due to its depiction of a scene involving King Lycurgus of Thrace, is a 1,600-year-old jade green Roman chalice that changes colour depending on the direction of the light upon it. It baffled scientists ever since the glass chalice was acquired by the British Museum in the 1950s. They could not work out why the cup appeared jade green when lit from the front but blood red when lit from behind.

The mystery was solved in 1990, when researchers in England scrutinized broken fragments under a microscope and discovered that the Roman artisans were nanotechnology pioneers: They had impregnated the glass with particles of silver and gold, ground down until they were as small as 50 nanometres in diameter, less than one-thousandth the size of a grain of table salt.

The work was so precise that there is no way that the resulting effect was an accident. In fact, the exact mixture of the previous metals suggests that the Romans had perfected the use of nanoparticles – “an amazing feat,” according to archaeologist Ian Freestone of University College London. When hit with light, electrons belonging to the metal flecks vibrate in ways that alter the colour depending on the observer’s position.

Now it seems that this technology, once used by the Romans to produce beautiful art, may have many more applications - the super-sensitive technology used by the Romans might help diagnose human disease or pinpoint biohazards at security checkpoints. Gang Logan Liu, an engineer at the University of Illinois at Urbana-Champaign, who has long focused on using nanotechnology to diagnose disease, and his colleagues, realized that this effect offered untapped potential. 

They conducted a study last year in which they created a plastic plate filled with gold or silver nanoparticles, essentially creating an array that was equivalent to the Lycurgus Cup. When they applied different solutions to the plate, such as water, oil, sugar and salt, the colours changed. The proto­type was 100 times more sensitive to altered levels of salt in solution than current commercial sensors using similar techniques. It may one day make its way into handheld devices for detecting pathogens in samples of saliva or urine, or for thwarting terrorists trying to carry dangerous liquids onto airplanes.

This is not the first time that Roman technology has exceeded that of our modern day.  Scientists studying the composition of Roman concrete , submerged under the Mediterranean Sea for the last 2,000 years, discovered that it was superior to modern-day concrete in terms of durability and being less environmentally damaging. The knowledge gained is now being used to improve the concrete we use today. Isn’t it ironic that scientists now turn to the works of our so-called ‘primitive’ ancestors for help in developing new technologies?

By April Holloway

Comments

Could this cup have been used to see if an assassin was trying to mix poison into the drink in the cup?

 

In the case of this cup, the change of color is relates to the light direction. If you put wine into it, with or without poison the light won't notice, i think :)

just amazing they could do something like this

This article is more than a bit disingenuous. The ability to create dust is not nano technology. The Romans knew how to grind metal into a fine powder and mix it with glass. So? I could do that in my garage. Lets be realistic. The gold smiths doing this were likely trying to make a material that was as aesthetically pleasing as gold, but cheaper to make. This was discovered by accident.

Roman concrete is another awful example. The reason Roman concrete is more durable is because it uses less water, and thus is less porous and susceptible to erosion when it dries. There is a reason we don't use that concrete in our roads though. Our roads require steel rebar to support the weight of modern vehicles. In order to construct our roads in reasonable time, our concrete must be poured. You couldn't pour Roman concrete; you had to apply it like a paste.

Were the ancients clever? Just as clever as people are today. Were they advanced? Definitely not. Keep in mind human life expectancy did not begin to improve until after the Enlightenment. From the Romans and Greeks to the tribes in Africa, people's lives were equally short lived.

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