Escape from the destruction of the galvanic replacement reaction for solid → hollow → solid conversion process in one pot reaction

Yi Hsin Chien, Ming Fong Tsai, Vijayakumar Shanmugam, Kripasindhu Sardar, Cheng Liang Huang, Chen Sheng Yeh

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Based on the difference in the redox potentials between two metal species, the galvanic replacement reaction is known to create an irreversible process to generate hollow nanostructures in a wide range of shapes. In the context of galvanic replacement reaction, continuing etching leads to the general collapse of the hollow structures because of the excess amount of oxidizing agent. We demonstrate the growth of solid nanostructures from a hollow frame-like architecture in the course of a galvanic replacement reaction without any morphology destruction. We report the successful composition transformation of solid Ag with a wide range of shapes, such as plate, decahedron, rod, prism, sphere, and foil, from as thin as <10 nm up to 5 μm and with an area of ∼4 mm2, to their solid Au counterparts using straightforward chemical reactions. The successful conversion process relies on a decrease in the reduction rate of the metallic precursor to initiate dissolution of Ag in the first stage (a galvanic replacement reaction), then a subsequent backfilling of Au into the hollowed-out structures. Cetyltrimethylammonium bromide (CTAB) surfactant, a key parameter, interacts with metal salt precursor to form a complex species that retards metal reduction. In addition, we demonstrate conversion of solid nano-Ag to solid nano-Pd as well as of Cu foil (10 μm thick) to shiny Au foil.

Original languageEnglish
Pages (from-to)3863-3871
Number of pages9
JournalNanoscale
Volume5
Issue number9
DOIs
Publication statusPublished - 2013 May 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Escape from the destruction of the galvanic replacement reaction for solid → hollow → solid conversion process in one pot reaction'. Together they form a unique fingerprint.

Cite this