世界最小聖誕賀卡誕生 "細"如頭髮

'The card is 200 micro-metres wide by 290 micro-metres tAll. 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 university's school of engineering drew up the design to highlight its 'world-leading' nanotechnology expertise. A total of 8,276 of the cards could be placed on an area the size of a stamp. Professor David Cumming and Dr Qin Chen etched the Christmas tree image on to a minute piece of glass.

如果用具體數字來說明卡的大小，那麼英國格拉斯哥大學納米技術研究人員會這樣告訴你，這張賀卡長290微米，寬200微米。而“微米”又是什麼概念呢？1微米相當於1米的一百萬分之一。用最直觀的方法來顯示出微米的大小我們可以拿頭髮做比較，一般“人類頭髮”的平均寬度僅僅爲100微米而已。所以這張迷你賀卡恐怕無法直接用肉眼看到，卡片雖小，但也十分精美。賀卡上繪有聖誕樹，科學家們爲了不將其弄丟，將它鑲嵌在一小塊玻璃上。

'You could fit over half a million of them on to a standard A5 Christmas card - but signing them would prove to be a bit of a challenge.'Although the Christmas card example is a simple demonstration, the university said the underlying technology has important real-world applications.

來自英國格拉斯哥大學納米技術研究人員說：“雖然納米聖誕賀卡只是納米技術的簡單體現，但是，這項技術在現實世界具有重要的應用前景。”研究人員還打趣到，雖然卡面的意義深遠，但是若要郵寄這個聖誕賀卡恐怕要費一番心思了。