scholarly journals Porous Au–Ag Nanoparticles from Galvanic Replacement Applied as Single‐Particle SERS Probe for Quantitative Monitoring

Small ◽  
2022 ◽  
Vol 18 (1) ◽  
pp. 2107532
Author(s):  
Lu Wang ◽  
Sergiy Patskovsky ◽  
Bastien Gauthier‐Soumis ◽  
Michel Meunier
Keyword(s):  
Single Particle ◽  
Ag Nanoparticles ◽  
Galvanic Replacement ◽  
Quantitative Monitoring

Porous Au–Ag Nanoparticles from Galvanic Replacement Applied as Single‐Particle SERS Probe for Quantitative Monitoring

Small ◽  
2021 ◽  
pp. 2105209
Author(s):  
Lu Wang ◽  
Sergiy Patskovsky ◽  
Bastien Gauthier‐Soumis ◽  
Michel Meunier
Keyword(s):  
Single Particle ◽  
Ag Nanoparticles ◽  
Galvanic Replacement ◽  
Quantitative Monitoring

scholarly journals Effects of Ar or O2Gas Bubbling for Shape, Size, and Composition Changes in Silver-Gold Alloy Nanoparticles Prepared from Galvanic Replacement Reaction

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Md. Jahangir Alam ◽  
Masaharu Tsuji
Keyword(s):  
Ag Nanoparticles ◽  
Major Product ◽  
Metal Nanostructures ◽  
Galvanic Replacement ◽  
Silver Nanostructures ◽  
Alloy Nanoparticles ◽  
Galvanic Replacement Reaction ◽  
Replacement Reaction ◽  
Gas Bubbling ◽  
Composition Changes

The galvanic replacement reaction between silver nanostructures andAuCl4-solution has recently been demonstrated as a versatile method for generating metal nanostructures with hollow interiors. Here we describe the results of a systematic study detailing the morphological, structural, compositional, and spectral changes involved in such a heterogeneous reaction on the nanoscale. Effects of Ar or O2gas bubbling for the formation of Ag-Au alloy nanoparticles by the galvanic replacement between spherical Ag nanoparticles andAuCl4-especially were studied in ethylene glycol (EG) at150°C. The shape, size, and composition changes occur rapidly under O2bubbling in comparison with those under Ar bubbling. The major product after 60 min heating under Ar gas bubbling was perforated Ag-Au alloy particles formed by the replacement reaction and the minor product was ribbon-type particles produced from splitting off some perforated particles. On the other hand, the major product after 60 min heating under O2gas bubbling was ribbon-type particles. In addition, small spherical Ag particles are produced. They are formed through rereduction of Ag+ions released from the replacement reaction and oxidative etching of Ag nanoparticles by O2/Cl−in EG.

The controlled synthesis of plasmonic nanoparticle clusters as efficient surface-enhanced Raman scattering platforms

2015 ◽  
Vol 51 (42) ◽  
pp. 8793-8796 ◽  
Author(s):  
Seunghoon Lee ◽  
Jong Wook Hong ◽  
Su-Un Lee ◽  
Young Wook Lee ◽  
Sang Woo Han
Keyword(s):  
Ag Nanoparticles ◽  
Au Nanoparticle ◽  
Galvanic Replacement ◽  
Controlled Synthesis ◽  
Plasmonic Nanoparticle ◽  
Surface Enhanced ◽  
Nanoparticle Clusters ◽  
Surface Enhanced Raman ◽  
Fine Control ◽  
Enhanced Raman Scattering

Au nanoparticle clusters were prepared by fine control over the galvanic replacement of Ag nanoparticles with Au precursors.

scholarly journals Monitoring Galvanic Replacement of Ag Nanoparticles by Pd using Low Dose In Situ Liquid S/TEM

2013 ◽  
Vol 19 (S2) ◽  
pp. 440-441
Author(s):  
K.L. Jungjohann ◽  
S. Bliznakov ◽  
R. Adzic ◽  
E. Sutter
Keyword(s):  
Ag Nanoparticles ◽  
Low Dose ◽  
Galvanic Replacement

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Improved single particle ICP-MS characterization of silver nanoparticles at environmentally relevant concentrations

2016 ◽  
Vol 31 (10) ◽  
pp. 2069-2077 ◽  
Author(s):  
Karla Newman ◽  
Chris Metcalfe ◽  
Jonathan Martin ◽  
Holger Hintelmann ◽  
Phil Shaw ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Single Particle ◽  
Ag Nanoparticles ◽  
Lake Ecosystem ◽  
Icp Ms

Improved single particle ICP-MS characterisation of Ag nanoparticles in a lake ecosystem using microsecond dwell times.

Nanoporous silver microstructure for single particle surface-enhanced Raman scattering spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1391-1397 ◽  
Author(s):  
Kanet Wongravee ◽  
Harnchana Gatemala ◽  
Chuchaat Thammacharoen ◽  
Sanong Ekgasit ◽  
Sanpon Vantasin ◽  
...  
Keyword(s):  
Single Particle ◽  
Particle Surface ◽  
Galvanic Replacement ◽  
Sers Substrate ◽  
Galvanic Replacement Reaction ◽  
Replacement Reaction ◽  
Raman Scattering Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Nanoporous silver microstructures were successfully fabricated from hexapod AgCl microstructures via a galvanic replacement reaction to be used as an easy handling and reusable SERS substrate.

Localization of immunolabels by electron microscopy and image averaging

1983 ◽  
Vol 41 ◽  
pp. 282-283
Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy
Keyword(s):  
Electron Microscopy ◽  
Single Particle ◽  
Attachment Site ◽  
Uranyl Acetate ◽  
Limulus Polyphemus ◽  
Resolution Limit ◽  
Electron Microscopic ◽  
Image Averaging ◽  
Top View ◽  
Better Than

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.

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