Chen, Yu-TungChen, Tsung-YuYi, JaemockChu, Yong S.Lee, Wah-KeatWang, Cheng-LiangKempson, Ivan M.Hwu, Y.Gajdosik, VincentMargaritondo, G.2011-12-162011-12-162011-12-16201110.1364/OL.36.001269https://infoscience.epfl.ch/handle/20.500.14299/74230WOS:000289251000083Since its invention in 1930, Zernike phase contrast has been a pillar in optical microscopy and more recently in x-ray microscopy, in particular for low-absorption-contrast biological specimens. We experimentally demonstrate that hard-x-ray Zernike microscopy now reaches a lateral resolution below 30nm while strongly enhancing the contrast, thus opening many new research opportunities in biomedicine and materials science. (C) 2011 Optical Society of AmericaPhase-Contrast ModeCIBM-PCtext::journal::journal article::research article