SEM of Darkest Manmade Material (image) Rensselaer Polytechnic Institute Share Print E-Mail Caption A side-view scanning electron micrograph of the darkest material at a high magnification. The nanotubes are vertically aligned, forming a highly porous nanostructure. Credit Rensselaer Usage Restrictions Please include photo credit Share Print E-Mail 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.