Premium
Facile Surfactant‐, Reductant‐, and Ag Salt‐free Growth of Ag Nanoparticles with Controllable Size from 35 to 660 nm on Bulk Ag Materials
Author(s) -
Ou Weihui,
Shen Junda,
Lyu Fucong,
Xiao Xufen,
Zhou Binbin,
Lu Jian,
Li Yang Yang
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100384
Subject(s) - nanoparticle , pulmonary surfactant , diffusion , nanotechnology , nanocrystal , materials science , salt (chemistry) , chemical engineering , substrate (aquarium) , catalysis , chemistry , organic chemistry , physics , oceanography , geology , engineering , thermodynamics
Morphologically and dimensionally controlled growth of Ag nanocrystals has long been plagued by surfactants or capping agents that complicate downstream applications, unstable Ag salts that impaired the reproducibility, and multistep seed injection that is troublesome and time‐consuming. Here, we report a one‐pot electro‐chemical method to fast (∼2 min) produce Ag nanoparticles from commercial bulk Ag materials in a nitric acid solution, eliminating any need for surfactants or capping agents. Their size can be easily manipulated in an unprecedentedly wide range from 35 to 660 nm. Furthermore, the Ag nanoparticles are directly grown on the Ag substrate, highly desirable for promising applications such as catalysis and plasmonics. The mechanistic studies reveal that the concentration of Ag + in the diffusion layer nearby the surface, controlled by the magnitude and duration of voltage, is critical in governing the nanoparticle formation (<1.3 mM) and its dimensional adjustability.