Electrode Structure (2 of 2) (IMAGE) University of New South Wales Caption A scanning electron microscope image shows the porous structure of the nickel-iron coating used to make UNSW Australia's inexpensive and efficient oxygen-producing electrode. The image is of the square section outlined on the previous image of the foam. The coating has pores about 50 nanometers across (scale bar is 200 nanometers) Credit UNSW Australia Usage Restrictions In association with a report on the research 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.