TY - DATA T1 - Correlated Electrochemical and Optical Detection Reveals the Chemical Reactivity of Individual Silver Nanoparticles PY - 2016/02/22 AU - Vitor Brasiliense AU - Anisha N. Patel AU - Ariadna Martinez-Marrades AU - Jian Shi AU - Yong Chen AU - Catherine Combellas AU - Gilles Tessier AU - Frédéric Kanoufi UR - https://acs.figshare.com/articles/media/Correlated_Electrochemical_and_Optical_Detection_Reveals_the_Chemical_Reactivity_of_Individual_Silver_Nanoparticles/3081001 DO - 10.1021/jacs.5b13217.s001 L4 - https://ndownloader.figshare.com/files/4788475 KW - chemical complexity KW - Correlated Electrochemical KW - charge transfer process KW - SCN KW - chemical transformation KW - EC spikes KW - Ag NPs KW - charge transfer KW - Chemical Reactivity KW - Individual Silver Nanoparticles Electrochemical KW - EC nanoimpacts KW - dissolution steps KW - EC signals KW - chemical processes KW - Optical Detection N2 - Electrochemical (EC) impacts of single nanoparticles (NPs) on an ultramicroelectrode are coupled with optics to identify chemical processes at the level of individual NPs. While the EC signals characterize the charge transfer process, the optical monitoring gives a complementary picture of the transport and chemical transformation of the NPs. This is illustrated in the case of electro­dissolution of Ag NPs. In the simplest case, the optically monitored dissolution of individual NPs is synchronized with individual EC spikes. Optics then validates in situ the concept of EC nanoimpacts for sizing and counting of NPs. Chemical complexity is introduced by using a precipitating agent, SCN–, which tunes the overall electro­dissolution kinetics. Particularly, the charge transfer and dissolution steps occur sequentially as the synchronicity between the EC and optical signals is lost. This demonstrates the level of complexity that can be revealed from such electrochemistry/optics coupling. ER -