Tiny man-made particles which are now used in the production of a huge range of everyday products are going under the microscope in Edinburgh.

A specialist research lab has opened its doors at Edinburgh Napier University, focussing on nanotechnology.

Nanoparticles are a thousand times smaller than the width of a human hair, however, they are becoming an increasingly important part of our lives.

They are used to make sunscreen more transparent on the skin and are used to fight bacteria on the coating on some razor blades.

However, scientists say very little is known about the long-term impact they could have on our health.

Critics worry that their use in skincare could lead to products permeating skin's protective layer or expose other cells to toxins.

The new research centre was opened by Scotland's Chief Scientific Advisor, Professor Anne Glover. She said: "Given the widespread use of nanomaterials in variety of everyday products, it is essential for us to fully understand them and their potential impacts.

"This centre is one of the first in the UK to bring together nano-science research across human, environment, reproductive health and microbiology to ensure the safe and sustainable ongoing use of nanotechnology."

Director of the Centre for Nano Safety, Vicki Stone, said: "Nanomaterials are used in a diverse range of products from medicines and water purifiers to make-up, food, paints, clothing and electronics. It is therefore essential that we fully understand their long term impact.

"We are dedicated to understanding the ongoing health and environmental affects of their use and then helping shape future policy for their development. The launch of this new centre is a huge step forward in this important area of research."