Microstructures Blow Holes in Cell Membranes (image) Harvard John A. Paulson School of Engineering and Applied Sciences Share Print E-Mail Caption Nanosecond pulses of laser heat the gold-covered pyramids, causing bubbles to form right at the tip of each pyramid. These bubbles gently push their way into the cell membrane, opening brief pores and allowing molecules to diffuse in. Credit (Video courtesy of Harvard SEAS) Usage Restrictions with 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.