Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 897, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2021.115594
Keywords
Electrodeposition; Nucleation; Nanomaterials; Anodic aluminum oxides
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2021R1F1A1061182]
- National Research Foundation of Korea [2021R1F1A1061182] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The use of artificial nuclei in electrodeposition facilitates uniform and stable Cu nanoobject fabrication within nanopores, providing precise control over the geometry of the nanoobjects. This approach effectively suppresses random overgrowth of Cu, achieving highly uniform distribution on substrate surfaces.
Electrochemical synthetic routes to sophisticated nanoobjects have been considered promising and reliable strategies for diverse purposes in a wide range of applications. In particular, electrodeposition using nanoporous templates has attracted intensive research interest due to the potential for realizing diverse nanostructures and delicate composition control of the resulting fabricated materials. Unfortunately, the electrochemical fill-ing of nanomaterials into nanoporous templates still suffers from unexpected nonuniform formation of nanoobjects, originating from random nucleation in each nanopore and overgrowth from only a few nanopores. Here, we present a highly uniform, straightforward and controllable fabrication of Cu nanoobjects via an artificial nucleation-assisted electrodeposition principle using nanoporous AAO templates. Pre-electrodeposited Ni nanoparticles at the bottom of the nanopores of AAO successfully acted as nuclei at the early stage of the Cu electrodeposition process. The artificial nuclei enable highly uniform and stable Cu electrodeposition inside the nanopores of AAO templates by effectively suppressing the random overgrowth of Cu. By taking advantage of the stable electrodeposition behaviour, we demonstrate precise control of the geometry of Cu nanoobjects, uniformly dispersed over whole surfaces of substrates.
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