Metal-organic framework “sardine can” (IMAGE) Osaka Metropolitan University Caption Figure: The metal-organic framework forms a scaffold, with nanometer-sized pores which hold molecules (left). As long n-hexane gas molecules are added to the pores under pressure, the molecules align in a “sardine can” effect (right). Credit Masahide Takahashi, OMU Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Original 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.