Publisher: American Chemical Society (ACS)

Issue: 23

License: [{"start"=>{"date-parts"=>[[2020, 6, 4]], "date-time"=>"2020-06-04T00:00:00Z", "timestamp"=>1591228800000}, "content-version"=>"vor", "delay-in-days"=>0, "URL"=>"http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html"}]

Publication date(s): 2020/06/16 (print) 2020/06/04 (online)

Pages: 13664-13671

Volume: 5 Issue: 23

Journal: ACS Omega

Link: [{"URL"=>"http://pubs.acs.org/doi/pdf/10.1021/acsomega.0c00697", "content-type"=>"application/pdf", "content-version"=>"vor", "intended-application"=>"unspecified"}, {"URL"=>"https://pubs.acs.org/doi/pdf/10.1021/acsomega.0c00697", "content-type"=>"unspecified", "content-version"=>"vor", "intended-application"=>"similarity-checking"}]

URL: http://dx.doi.org/10.1021/acsomega.0c00697

The formation of silver and Au@Ag core@shell nanoparticles via reduction of AgNO3 by trisodium citrate was followed using in situ X-ray absorption near-edge structure (XANES) spectroscopy and time-resolved UV–visible (UV–vis) spectroscopy. The XANES data were analyzed through linear combination fitting, and the reaction kinetics were found to be consistent with first-order behavior with respect to silver cations. For the Au@Ag nanoparticles, the UV–vis data of a lab-scale reaction showed a gradual shift in dominance between the gold- and silver-localized surface plasmon absorbance bands. Notably, throughout much of the reaction, distinct gold and silver contributions to the UV–vis spectra were observed; however, in the final product, the contributions were not distinct.