Nantotechnology experts from the Scotland's University of Glasgow, led by Professor David Cumming, produced a Christmas card featuring a Christmas tree etched on a tiny piece of glass,which is is 200 micro-metres wide by 290 micro-metres tall - setting the world record for the Smallest Christmas card.
The World's Smallest Christmas Card is so small that more than 8,000 of them could fit on a first-class stamp. Invisible to the naked eye, the World's Smallest Christmas Card is so small that 8,276 of them could fit on an area the size of a postage stamp.
"The card is 200 micro-metres wide by 290 micro-metres tall," Professor David Cumming, who made the card, said in a statement on the university's website.
"To put that into some sort of perspective, a micro-metre is a millionth of a metre; the width of a human hair is about 100 micro-metres.
"You could fit over half a million of them onto a standard A5 Christmas card - but signing them would prove to be a bit of a challenge."
"The process to manufacture the card only took 30 minutes. It was very straightforward to produce as the process is highly repeatable - the design of the card took far longer than the production.
The colours were produced by a process known as plasmon resonance in a patterned aluminium film made in the university's James Watt Nanofabrication Centre.
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