PT - JOURNAL ARTICLE ED - , TI - Hollowing Out Metal Oxide Nanoparticles AID - 10.1126/science.340.6135.899-n DP - 2013 May 24 TA - Science PG - 899--899 VI - 340 IP - 6135 4099 - http://science.sciencemag.org/content/340/6135/899.14.short 4100 - http://science.sciencemag.org/content/340/6135/899.14.full SO - Science2013 May 24; 340