Influence of acetic acid on the morphology of indium oxide nanocrystals and the associated plasmonic properties  

醋酸对氧化铟纳米晶形貌的影响及相关等离激元性质研究

作　　者：Jiangtong Su Peixian Li Zhe Liu Zifeng Liu Xiaoqi Hou Junli Duan Ning Dai Yang Li 苏江彤;李培显;刘喆;刘子沣;侯小琪;段俊丽;戴宁;李洋(School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China;School of Chemistry and Material Science,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)

机构地区：[1]School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China [2]School of Chemistry and Material Science,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China

出　　处：《Science China Materials》2025年第2期432-440,共9页中国科学(材料科学)(英文版)

基　　金：financially supported by the National Natural Science Foundation of China (22005267 and 22105011);the Basic Public Research Program of Zhejiang Province (LGF22B010004 and LY23B010001);the National Key Technologies R&D Program of China (2022YFA1207000);the Research Funds of Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (A05006C019001 and 2024HIAS-Y008);Hangzhou Science and Technology Bureau of Zhejiang Province (TD2020002);Department of Science and Technology of Zhejiang Province (2024C01192)。

摘　　要：Synthetic control of metal oxide nanocrystals with precise size and morphology is of great importance for promising optoelectronic applications due to their unique size-and shape-dependent optical/optoelectronic properties.Nevertheless,the understanding of the mechanism for size and morphology control of metal oxide nanocrystals are less studied.Here,we demonstrate that acetic acid,the byproduct of the initial chemical reaction of precursors,plays a dominant role in determining the morphology of indium oxide(In_(2)O_(3))nanocrystals by influencing the nucleation of the nanocrystals formation.Sufficient acetic acid would induce anisotropic growth,leading to the generation of nanoflowers,while limited existence of acetic acid results in sphere-shaped nanocrystals.Furthermore,the effects of geometries of In_(2)O_(3) nanocrystals on their plasmonic properties are studied.The resulting plasmonic In_(2)O_(3) nanocrystals show size-tunable plasmon resonance peaks in the near-infrared to mid-infrared regime and outstanding air/thermal stability.Our work shall give an in-depth understanding of the mechanism for geometry control of nanocrystals and offer more opportunities in potential optoelectronic and photothermal applications based on plasmonic metal oxide nanocrystals.金属氧化物纳米晶体具有独特的尺寸及形貌依赖的光学/光电特性,因此实现金属氧化物纳米晶的可控合成对其光电应用具有重要意义.然而,目前对于金属氧化物纳米晶尺寸和形貌的关键影响因素研究相对较少.在本工作中,我们发现,在前驱体反应过程形成的副产物—醋酸,通过影响纳米晶的成核过程,对氧化铟纳米晶的形貌控制起了决定性作用.具体地,醋酸过量时会诱导纳米晶各向异性生长,生成纳米花;而在少量或者无醋酸条件下,所得氧化铟纳米晶呈球形.进一步地,我们探究了氧化铟纳米晶的几何形状对表面等离基元性质的影响.通过调节几何形状,可以得到在近红外到中波红外具有可调谐的表面等离基元共振吸收的等离子体纳米晶,同时展现出优异的稳定性.本工作深入探究了金属氧化物纳米晶的几何形状影响机制,为基于等离子体金属氧化物纳米晶的光电和光热应用提供更多指导.

关 键 词：colloidal semiconductor nanocrystals metal oxide nanocrystals localized surface plasmon resonance surface ligands geometry control 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ133.53[化学工程—无机化工]