Tailoring the Chemical Potential of Crystal Growth Units to Tune the Bulk Structure of Nanocrystals
Tailoring the Chemical Potential of Crystal Growth Units to Tune the Bulk Structure of Nanocrystals
复制标题
定制晶体生长单元的化学势以调整纳米晶体的体结构
DOI：
10.1002/smtd.202000447
复制
发表时间：
2021
期刊：
影响因子：
12.4
通讯作者：
Xie Zhaoxiong
中科院分区：
文献类型：
--
作者：
Zhang Jiawei;Du Guifen;Li Huiqi;Chen Qiaoli;Kuang Qin;Jiang Zhiyuan;Xie Zhaoxiong
在晶化过程中，影响纳米微晶块体结构的内在因素还没有得到很好的探讨。在这项研究中，证明了生长基元的化学势在控制纳米晶体的最终结构中起着决定性的作用。研究发现，反应容器的类型能够改变生长单元的化学势，使铂和钯纳米晶(NCS)意外地从环状五孪晶演变为单晶纳米结构。在成核过程中，化学势较低的晶体生长单元有利于形成化学势较低的晶核。这种调整纳米碳管体相结构的新方法丰富了对过饱和(非平衡)条件下结晶过程的理解，并将为控制具有不同热力学形式的纳米晶提供一般指导。
The intrinsic factors affecting the bulk structures of nanocrystallites are not well explored during crystallization. In this study, it is demonstrated that the chemical potential of growth units plays decisive role in governing the final structure of nanocrystals. It is found that the types of reaction vessels are able to vary the chemical potential of growth units, and make the Pt and Pd nanocrystals (NCs) unexpectedly evolve from the cyclic penta‐twinned to the single‐crystal nanostructures. In turn, it is concluded that the crystal growth units with lower chemical potential favor the formation of crystal nuclei with lower chemical potential during the nucleation. This new approach in tuning the bulk structures of NCs enriches the understanding of the crystallization process under supersaturated (nonequilibrium) condition, and would provide a general guidance for controlling nanocrystals with various thermodynamic forms.