GaAs under Pressure (IMAGE) Carnegie Institution for Science Caption This is a microphotograph of "wurzite" GaAs nanowire in a diamond anvil cell high pressure cavity kept at 99,000 times normal atmospheric pressure (10 gigapascals); a blue spot is from the 488 nm laser spot (about 4 µm in diameter). Credit Wei Zhou Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.