Abstract
Surface ligands play critical roles in nano-synthesis and thus it is of great importance in expanding the scope of suitable ligands. In this work, we explore phenynyl ligands in modulating the Au-Au interface when growing Au domains on Au seeds. A patchy growth mode is observed where the emerging islands are flat-laying with holes and branches. This growth mode is distinctively different from the conventional facet-controlled growth using weak ligands, and the non-wetting island growth using strong ligands. Through manipulating the molecular structure and the packing of the phenynyl ligands on the Au seeds, the overgrown Au domains are continuously tuned, from patches to islands, extending the plasmon absorption peak into the near-infrared spectral range. We believe that the new ligand with intermediate affinity and the unusual growth mode would expand the control in both synthesis and application.
摘要
表面配体在纳米合成中起着关键作用, 扩大适用于纳米合成的配体范围具有重要意义. 本工作中, 我们系统研究了炔基配体在金种子上生长金时对金-金界面的调节作用. 我们观察到了一种新的“补丁”生 长模式: 具有孔洞以及分支的金补丁“平躺”在金种子表面. 这种生长模式与传统的弱配体控制的晶面生长以及强配体调控下的非润湿岛状生长截然不同. 通过控制炔基配体的分子结构及其在金种子表面的排列, 生长的金可以从补丁形状连续调节到岛状, 同时其等离子体共振吸收从可见光区扩展到了近红外光谱区域. 我们相信这类具有中等强度、 能够控制特殊生长模式的新配体的应用, 能够显著提升纳米合成及应用中的配体控制作用.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21673117 and 91956109), Jiangsu Provincial Foundation for Specially-Appointed Professor, Jiangsu Science and Technology Plan (BK20211258), Nanjing Tech University (39837102 and 39837140), and SICAM Fellowship from Jiangsu National Synergetic Innovation Center for Advanced Materials.
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Author contributions Zong J, Feng Y, and Chen H conceived the idea and explained the mechanism of structure synthesis, wrote and revised the manuscript. Zong J performed the syntheses and characterization of the nanomaterials. Ren Q, Tian X, and Xiang T participated in the discussion, gave suggestions on the mechanisms, and helped in the artworks.
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Supplementary information Supporting data are available in the online version of the paper.
Jianpeng Zong is now a PhD student at the School of Chemistry and Molecular Engineering, Nanjing Tech University, under the supervision of Profs. Yuhua Feng and Hongyu Chen. His research focuses on the synthesis of Janus nanostructures based on interfacial energy control.
Yuhua Feng received his BSc and MSc degrees from Northeast Normal University and PhD degree from Nankai University in 2008. He joined Nanjing Tech University in 2017 as professor. His research interest focuses on the design and synthesis of hybrid nanostructures and their applications in plasmonic, SERS and catalysis.
Hongyu Chen received his BSc degree from the University of Science and Technology of China in 1998 and PhD degree from Yale University in 2004. He joined Nanyang Technological University in 2006 and became associate professor in 2011. He joined Nanjing Tech University as professor in 2016 and now he is a full professor at Westlake University. His research interest focuses on the development of new synthetic control of complex nanostructures.
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Zong, J., Ren, Q., Tian, X. et al. The patchy growth mode: Modulation of the Au-Au interface via phenynyl ligands. Sci. China Mater. 65, 1687–1695 (2022). https://doi.org/10.1007/s40843-021-1942-6
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DOI: https://doi.org/10.1007/s40843-021-1942-6