English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Hexagonal silver nanoparticles are directly formed in a solution of 6.6mM silver citrate and 132mM ammonia irradiated by 1.98­2.46 eV visible light. The corresponding silver ion concentration is 19.8mM, which is several orders of magnitude higher than those employed in other silver-nanoparticle-formation experiments. In the present study, the roles of silver citrate and ammonia on nanoparticle formation are investigated through experiments in which the concentrations of silver citrate (SC) and ammonia (NH3) are altered. Silver nanoparticles are efficiently formed when [SC] is the 1.65­6.6mM range and the [NH3]/[SC] ratio is 38­16. Further, hexagonal nanoplates are dominantly formed when [SC] = 1.65­6.6mM and [NH3]/[SC] = 316. Within this range, hexagonal nanoplate formation is insensitive to solution concentration. Concentrations of SC less than 1.65mM, or NH3 2 132mM, inhibit the formation of silver nanoparticles. These observations suggest that aggregates composed of diammine silver complexes and citrate are formed at specific concentration ranges of SC and NH3, and they assist in the photoreduction of silver ions by 1.98­2.46 eV visible light. Furthermore, the lateral growth of platelet seeds is proposed to be the dominant mechanism for the formation of hexagonal nanoplates at [SC] values of 1.65­6.6mM and [NH3]/[SC] = 316. [doi:10.2320/matertrans.M2017405]

Visible-Light-Assisted Silver Ion Reduction through Silver Diammine and Citrate Aggregation, and Silver Nanoparticle Formation