Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy.

We study the galvanic replacement reaction of silver nanocubes in dilute, aqueous ethylenediaminetetraacetic acid disodium salt (EDTA)-capped gold aurate solutions using in situ liquid-cell electron microscopy. Au/Ag etched nanostructures with concave faces are formed via (1) etching that starts from the faces of the nanocubes, followed by (2) the deposition of an Au layer as a result of galvanic replacement, and (3) Au deposition via particle coalescence and monomer attachment where small nanoparticles are formed during the reaction as a result of radiolysis. Analysis of the Ag removal rate and Au deposition rate provides a quantitative picture of the growth process and shows that the morphology and composition of the final product are dependent on the stoichiometric ratio between Au and Ag.

[1]  Shuyan Song,et al.  L-Arginine-Triggered Self-Assembly of CeO2 Nanosheaths on Palladium Nanoparticles in Water. , 2016, Angewandte Chemie.

[2]  Hyunjoon Song,et al.  Ex Situ and in Situ Surface Plasmon Monitoring of Temperature-Dependent Structural Evolution in Galvanic Replacement Reactions at a Single-Particle Level , 2015 .

[3]  Hamed Ataee-Esfahani,et al.  Attachment-based growth: building architecturally defined metal nanocolloids particle by particle , 2015 .

[4]  Dean J. Miller,et al.  Growth of Au on Pt icosahedral nanoparticles revealed by low-dose in situ TEM. , 2015, Nano letters.

[5]  Dapeng Liu,et al.  γ-Al2O3 supported Pd@CeO2 core@shell nanospheres: salting-out assisted growth and self-assembly, and their catalytic performance in CO oxidation , 2015, Chemical science.

[6]  E. Sutter,et al.  Determination of redox reaction rates and orders by in situ liquid cell electron microscopy of Pd and Au solution growth. , 2014, Journal of the American Chemical Society.

[7]  K. Jungjohann,et al.  In situ liquid-cell electron microscopy of silver–palladium galvanic replacement reactions on silver nanoparticles , 2014, Nature Communications.

[8]  Lin-Wang Wang,et al.  Facet development during platinum nanocube growth , 2014, Science.

[9]  Mohammad M. Shahjamali,et al.  Edge-Gold-Coated Silver Nanoprisms: Enhanced Stability and Applications in Organic Photovoltaics and Chemical Sensing , 2014 .

[10]  L. Liz‐Marzán,et al.  Monitoring galvanic replacement through three-dimensional morphological and chemical mapping. , 2014, Nano letters.

[11]  S. Rosenthal,et al.  Where's the silver? Imaging trace silver coverage on the surface of gold nanorods. , 2014, Journal of the American Chemical Society.

[12]  Haimei Zheng,et al.  Observation of growth of metal nanoparticles. , 2013, Chemical communications.

[13]  Younan Xia,et al.  25th Anniversary Article: Galvanic Replacement: A Simple and Versatile Route to Hollow Nanostructures with Tunable and Well‐Controlled Properties , 2013, Advanced materials.

[14]  Dapeng Liu,et al.  Pt@CeO2 multicore@shell self-assembled nanospheres: clean synthesis, structure optimization, and catalytic applications. , 2013, Journal of the American Chemical Society.

[15]  N. de Jonge,et al.  Dendritic gold nanowire growth observed in liquid with transmission electron microscopy. , 2013, Langmuir : the ACS journal of surfaces and colloids.

[16]  James E. Evans,et al.  Direct in situ determination of the mechanisms controlling nanoparticle nucleation and growth. , 2012, ACS nano.

[17]  S. Dillon,et al.  Challenges associated with in-situ TEM in environmental systems: The case of silver in aqueous solutions , 2012 .

[18]  P. Matsudaira,et al.  Direct observation of stick-slip movements of water nanodroplets induced by an electron beam , 2012, Proceedings of the National Academy of Sciences.

[19]  Jordi Arbiol,et al.  Carving at the Nanoscale: Sequential Galvanic Exchange and Kirkendall Growth at Room Temperature , 2011, Science.

[20]  Yugang Sun,et al.  Monitoring of galvanic replacement reaction between silver nanowires and HAuCl4 by in situ transmission X-ray microscopy. , 2011, Nano letters.

[21]  A. Alivisatos,et al.  Observation of Single Colloidal Platinum Nanocrystal Growth Trajectories , 2009, Science.

[22]  D. Peckys,et al.  Electron microscopy of whole cells in liquid with nanometer resolution , 2009, Proceedings of the National Academy of Sciences.

[23]  Younan Xia,et al.  A Comparative Study of Galvanic Replacement Reactions Involving Ag Nanocubes and AuCl2− or AuCl4− , 2008, Advanced materials.

[24]  C. Cobley,et al.  Tailoring the Optical and Catalytic Properties of Gold‐Silver Nanoboxes and Nanocages by Introducing Palladium , 2008 .

[25]  Younan Xia,et al.  Facile synthesis of Ag nanocubes and Au nanocages , 2007, Nature Protocols.

[26]  Joseph M. McLellan,et al.  Optical properties of Pd-Ag and Pt-Ag nanoboxes synthesized via galvanic replacement reactions. , 2005, Nano letters.

[27]  Younan Xia,et al.  Mechanistic study on the replacement reaction between silver nanostructures and chloroauric acid in aqueous medium. , 2004, Journal of the American Chemical Society.

[28]  Younan Xia,et al.  Shape-Controlled Synthesis of Gold and Silver Nanoparticles , 2002, Science.

[29]  G. Anderegg.  Complex formation of silver(I) ion with some aminopolycarboxylate ligands , 1992 .

[30]  Stephen J. Pennycook,et al.  High-resolution Z-contrast imaging of crystals , 1991 .

[31]  D. A. Tanaka,et al.  Thermodynamics of protonation and complexation of EDTA derivatives and metal cations in water , 1998 .