AUTHOR=Zhang He , Chen Wei-Gen , Li Yan-Qiong , Jin Ling-Feng , Cui Fang , Song Zi-Hao TITLE=3D Flower-Like NiO Hierarchical Structures Assembled With Size-Controllable 1D Blocking Units: Gas Sensing Performances Towards Acetylene JOURNAL=Frontiers in Chemistry VOLUME=Volume 6 - 2018 YEAR=2018 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00472 DOI=10.3389/fchem.2018.00472 ISSN=2296-2646