文献类型：期刊文献

英文题名：Construction of the single- diamond- structured titania scaffold- Recreation of the holy grail photonic structure

作者：Wang, Chao[1];Cui, Congcong[1];Deng, Quanzheng[1];Zhang, Chong[1];Asahina, Shunsuke[2,3];Cao, Yuanyuan[4];Mai, Yiyong[1,5];Che, Shunai[1,5];Han, Lu[1]

机构：[1]Tongji Univ, Sch Chem Sci & Engn, Shanghai 200092, Peoples R China;[2]Japan Electron Opt Lab Co Ltd, Applicat Planning Grp, Akishima, Tokyo 1968558, Japan;[3]Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[5]Shanghai Jiao Tong Univ, Frontiers Sci Ctr Transformat Mol, Sch Chem & Chem Engn, State Key Lab Composite Mat, Shanghai 200240, Peoples R China

年份：2024

卷号：121

期号：15

外文期刊名：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001207680000007)】；

基金：ACKNOWLEDGMENTS . We thank Prof. Hexiang Deng and Mr. Gaoli Hu, Wuhan University, for the support for SAXS measurements. This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 22373074, L.H.; 22225501, Y.M.; and 22005096, Y.C.) and Fundamental Research Funds for the Central Universities (L.H. and Y.C.) .

语种：英文

外文关键词：single- diamond; block copolymer; self- assembly; electron crystallography; photonic structure

摘要：As one of the most stunning biological nanostructures, the single- diamond (SD) surface discovered in beetles and weevils exoskeletons possesses the widest complete photonic bandgap known to date and is renowned as the "holy grail" of photonic materials. However, the synthesis of SD is difficult due to its thermodynamical instability compared to the energetically favoured bicontinuous double diamond and other easily formed lattices; thus, the artificial fabrication of SD has long been a formidable challenge. Herein, we report a bottom-up approach to fabricate SD titania networks via a one - pot cooperative assembly scenario employing the diblock copolymer poly(ethylene oxide)- block- polystyrene as a soft template and titanium diisopropoxide bis(acetylacetonate) as an inorganic precursor in a mixed solvent, in which the SD scaffold was obtained by kinetically controlled nucleation and growth in the skeletal channels of the diamond minimal surface formed by the polymer matrix. Electron crystallography investigations revealed the formation of tetrahedrally connected SD frameworks with the space group Fd 3 m in a polycrystalline anatase form. A photonic bandgap calculation showed that the resulting SD structure has a wide and complete bandgap. This work solves the complex synthetic enigmas and offers a frontier in hyperbolic surfaces, biorelevant materials, next- generation optical devices, etc.