A link for: Citrate-Free Synthesis of Silver Nanoplates and the Mechanistic Study

Abstract

 report a citrate-free synthesis of Ag nanoplates with an edge length of 50 nm that involved the reduction of AgNO3 by poly(vinyl pyrrolidone) (PVP) in ethanol at 80 °C under a solvothermal condition. Within a period of 4 h, greater than 99% of the initially added AgNO3 could be converted into Ag nanoplates with excellent stability. To understand this remarkably simple and efficient process, we systematically investigated the roles played by various reaction parameters, which include the type of precursor, reducing powers of PVP and ethanol, molar ratio of PVP to AgNO3, solvent, involvement of O2, and effects of pressure and temperature. Our results suggest a plausible mechanism that involves (i) fast reduction of AgNO3 to generate Ag multiple twinned particles (MTPs) via a thermodynamically controlled process, (ii) kinetically controlled formation of plate-like seeds and their further growth into small nanoplates in the presence of Ag+ ions at a low concentration, and (iii) complete transfer of Ag atoms from the MPTs to nanoplates via O2-mediated Ostwald ripening. We demonstrated that the molar ratio of PVP to AgNO3 in ethanol plays an essential role in controlling the reduction rate for the formation of MTPs and plate-like seeds under the solvothermal condition, transformation kinetics, and final morphology taken by the Ag nanoplates. In particular, when the reaction temperatures were above the boiling point of ethanol, the pressure induced by a solvothermal process accelerated the oxidative etching of Ag MTPs to facilitate their complete conversion into nanoplates. The mechanistic insight could serve as a guideline to optimize the experimental parameters of a solvothermal synthesis to control the reduction kinetics and thus the formation of metallic nanocrystals with controlled shapes and in high yields and large quantities.

is shown here: https://www.google.com.eg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjo8KDCxuHOAhUJOxQKHVDaDiYQFggfMAA&url=http%3A%2F%2Fpubs.acs.org%2Fdoi%2Fabs%2F10.1021%2Fam401374x&usg=AFQjCNFYI9kJxpISnoGFzrvDajezsN-L-A&sig2=aqumSrzpW-YvVpLmClVd3Q

 Find in attachment a perper on: A Mechanistic Study on the Formation of Silver Nanoplates in the Presence of Silver Seeds and Citric Acid or Citrate Ions

Jie Zeng,[a] Jing Tao,[b] Weiyang Li,[a] Jennifer Grant,[c] Phyllis Wang,[c] Yimei Zhu,[b] and Younan Xia*. Chem. Asian J. 2011, 6, 376 – 379

  Find in attachment a paper on: Synthesis of Silver Nanostructures by Multistep Methods

Tong Zhang 1,2,*, Yuan-Jun Song 1,2,3, Xiao-Yang Zhang 1,2 and Jing-Yuan Wu 1,2.

Sensors 2014, 14

A Systematic Study of the Synthesis of Silver Nanoplates: Is Citrate a “Magic” Reagent?.

http://scholar.google.com.eg/scholar?q=citrate+as+stabilizer+for+ag+nanoplates+and+the+mechanistic+study&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ved=0ahUKEwix2rSxyuHOAhUCbhQKHXE8DKEQgQMIGDAA

 In attach, A facile photochemical route for the synthesis of triangular Ag

nanoplates and colorimetric sensing of H2O2

In attach, Silver Nanoplate Contrast Agents for In Vivo Molecular Photoacoustic Imaging Kimberly A. Homan, Michael Souza, Ryan Truby, Geoffrey P. Luke, Christopher Green, Erika Vreelandŧ, and Stanislav Emelianov*

Biomedical Engineering Department, The University of Texas at Austin, 1 University Station C0800, Austin, Texas, 78712, USA

ŧChemical Engineering Department, University of New Mexico, 1 University of New Mexico, New Mexico, 87131, USA. Published in final edited form as:

ACS Nano. 2012 January 24; 6(1): 641–650. doi:10.1021/nn204100n.

 In attach, THE PHOTO-MEDIATED SYNTHESIS OF SILVER NANOPRISMS AND TUNING OF THEIR PLASMONIC PROPERTIES

BY JOHN MICHAEL ABENDROTH

  In attach, PROJECT DESCRIPTION on: Synthesis of Metal Nanocrystals

Electrodeposition of Vertically Aligned Silver Nanoplate Arrays on Indium Tin Oxide Substrates.

https://www.google.com.eg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=18&cad=rja&uact=8&ved=0ahUKEwiB0L_PyuHOAhXBWBQKHWyvCH84ChAWCDgwBw&url=http%3A%2F%2Fdx.doi.org%2F10.1021%2Facs.jpcc.5b05109&usg=AFQjCNHMaLGfi-hulianQvSAjfbpyvSiwg&sig2=mbxg1w5n_6skUR5uvH5NPw

In attach, A Review on Metal Nanostructures: Preparation Methods and Their

Potential Applications

Umair Yaqub Qazi*, Rahat Javaid