The 'tongue' could be used to taste a range of liquids, according to one researcher.
The work was carried out by engineers and chemists from the Universities of Glasgow and Strathclyde.
In an announcement Monday, the University of Glasgow said that engineers had built a device which used "the optical properties of gold and aluminum" to test different types of whisky. The small differences in how the gold and aluminum in the tongue absorbed light enabled researchers to distinguish between different kinds of whiskies.
"Like us, it can't identify the individual chemicals which make coffee taste different to apple juice but it can easily tell the difference between these complex chemical mixtures," he added.
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