Chen Xiaoliang, He Feng, Fang Weina, Shen Jianlei, Liu Xiaoguo, Xue Yurui, Liu Huibiao, Li Jiang, Wang Lihua, Li Yuliang, Fan Chunhai
Division of Physical Biology and Bioimaging Center, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 201800, China.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
ACS Cent Sci. 2020 May 27;6(5):779-786. doi: 10.1021/acscentsci.0c00223. Epub 2020 Apr 21.
Nobel metal nanoparticles with tunable morphologies are highly desirable due to their unique electronic, magnetic, optical, and/or catalytic features. Here we report the use of multilayered graphdyine (GD) as a substrate for the reductant-free, room-temperature synthesis of single-crystal Au nanostructures with tunable morphology. We find that the GD template rich in sp-carbon atoms possesses high affinity with Au atoms on the {111} facets, and that the intrinsic reductivity of GD facilitates the rapid growth of Au nanoplates. The introduction of single-stranded DNA strands further results in the synthesis of Au nanostructures with decreased anisotropy, i.e., polygons and flower-like nanoparticles. The DNA-guided tunable Au growth arises from the strong adsorption of DNA on the GD template that alters the uniformity of the interface, which provides a direct route to synthesize Au nanostructures with tailorable morphology and photonic properties.
具有可调节形态的贵金属纳米颗粒因其独特的电子、磁性、光学和/或催化特性而备受青睐。在此，我们报道了使用多层石墨烯（GD）作为基底，在无还原剂的室温条件下合成具有可调节形态的单晶金纳米结构。我们发现，富含sp碳原子的GD模板与{111}晶面上的金原子具有高亲和力，并且GD的固有还原性促进了金纳米板的快速生长。单链DNA链的引入进一步导致合成出各向异性降低的金纳米结构，即多边形和花状纳米颗粒。DNA引导的金生长的可调节性源于DNA在GD模板上的强烈吸附，这改变了界面的均匀性，为合成具有可定制形态和光子特性的金纳米结构提供了一条直接途径。
