Electrically driven cation exchange for in situ fabrication of individual nanostructures
- Southeast Univ., Nanjing (China). School of Science and Engineering, Key Lab. of MEMS of Ministry of Education, SEU-FEI Nano-Pico Center
- Southeast Univ., Nanjing (China). School of Science and Engineering, Key Lab. of MEMS of Ministry of Education, SEU-FEI Nano-Pico Center; Nanjing Tech Univ. (China). College of Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
- Southeast Univ., Nanjing (China). School of Science and Engineering, Key Lab. of MEMS of Ministry of Education, SEU-FEI Nano-Pico Center; Southeast Univ. and Monash Univ., Suzhou (China). Center for Advanced Materials and Manufacture, Joint Research Inst.
Cation exchange (CE) has been recognized as a particularly powerful tool for the synthesis of heterogeneous nanocrystals. Presently, CE can be divided into two categories, namely ion solvation-driven CE reaction and thermally activated CE reaction. Here we report an electrically driven CE reaction to prepare individual nanostructures inside a transmission electron microscope. During the process, Cd is eliminated due to Ohmic heating, whereas Cu + migrates into the crystal driven by the electrical field force. Contrast experiments reveal that the feasibility of electrically driven CE is determined by the structural similarity of the sulfur sublattices between the initial and final phases, and the standard electrode potentials of the active electrodes. These experimental results demonstrate a strategy for the selective growth of individual nanocrystals and provide crucial insights into understanding of the microscopic pathways leading to the formation of heterogeneous structures.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; KC22ZH
- OSTI ID:
- 1413725
- Journal Information:
- Nature Communications, Vol. 8; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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