Ag2SO4 decorated with fluorescent Agn nanoclusters

Cheng Fang; Joseph Shapter; Nicolas Voelcker; Amanda Ellis

doi:10.1016/j.apsusc.2012.12.097

Ag2SO4 decorated with fluorescent Agn nanoclusters

Cheng Fang, Joseph Shapter, Nicolas Voelcker, Amanda Ellis

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Here we report on the production of an Ag ₂ SO ₄ /Ag ₂ O mixed-grain powder during the anodization of Ag foil in a HF-H ₂ SO ₄ electrolyte. We propose that there are three competing reactions during the anodization process: (i) the production of Ag ₂ O at the Ag foil anode surface from the presence of water in the electrolyte, (ii) the dissolution of the Ag ₂ O in the presence of HF releasing Ag ⁺ ions, (iii) the precipitation of Ag ⁺ and SO ₄ ^2- ions, as Ag ₂ SO ₄ on the Ag foil anode surface. This co-precipitation/dissolution process ultimately results in a mixed-grain powder. We then show that the Ag ₂ O embedded within the mixed-grain is photo-decomposed to produce highly fluorescent silver nanoclusters (Ag _n ) which decorate the Ag ₂ SO ₄ crystals. The Ag ₂ SO ₄ salt offers a stable matrix for the photo-decomposed Ag _n nanoclusters to emit their strong fluorescence.

Original language	English
Pages (from-to)	77-81
Number of pages	5
Journal	Applied Surface Science
Volume	270
DOIs	https://doi.org/10.1016/j.apsusc.2012.12.097
Publication status	Published - 1 Apr 2013

Keywords

Electrochemistry
Fluorescence
Silver nanoclusters
Silver sulphate/silver oxide mixed-grain powder

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10.1016/j.apsusc.2012.12.097

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title = "Ag2SO4 decorated with fluorescent Agn nanoclusters",

abstract = " Here we report on the production of an Ag 2 SO 4 /Ag 2 O mixed-grain powder during the anodization of Ag foil in a HF-H 2 SO 4 electrolyte. We propose that there are three competing reactions during the anodization process: (i) the production of Ag 2 O at the Ag foil anode surface from the presence of water in the electrolyte, (ii) the dissolution of the Ag 2 O in the presence of HF releasing Ag + ions, (iii) the precipitation of Ag + and SO 4 2- ions, as Ag 2 SO 4 on the Ag foil anode surface. This co-precipitation/dissolution process ultimately results in a mixed-grain powder. We then show that the Ag 2 O embedded within the mixed-grain is photo-decomposed to produce highly fluorescent silver nanoclusters (Ag n ) which decorate the Ag 2 SO 4 crystals. The Ag 2 SO 4 salt offers a stable matrix for the photo-decomposed Ag n nanoclusters to emit their strong fluorescence.",

keywords = "Electrochemistry, Fluorescence, Silver nanoclusters, Silver sulphate/silver oxide mixed-grain powder",

author = "Cheng Fang and Joseph Shapter and Nicolas Voelcker and Amanda Ellis",

year = "2013",

month = apr,

day = "1",

doi = "10.1016/j.apsusc.2012.12.097",

language = "English",

volume = "270",

pages = "77--81",

journal = "Applied Surface Science",

issn = "0169-4332",

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TY - JOUR

T1 - Ag2SO4 decorated with fluorescent Agn nanoclusters

AU - Fang, Cheng

AU - Shapter, Joseph

AU - Voelcker, Nicolas

AU - Ellis, Amanda

PY - 2013/4/1

Y1 - 2013/4/1

N2 - Here we report on the production of an Ag 2 SO 4 /Ag 2 O mixed-grain powder during the anodization of Ag foil in a HF-H 2 SO 4 electrolyte. We propose that there are three competing reactions during the anodization process: (i) the production of Ag 2 O at the Ag foil anode surface from the presence of water in the electrolyte, (ii) the dissolution of the Ag 2 O in the presence of HF releasing Ag + ions, (iii) the precipitation of Ag + and SO 4 2- ions, as Ag 2 SO 4 on the Ag foil anode surface. This co-precipitation/dissolution process ultimately results in a mixed-grain powder. We then show that the Ag 2 O embedded within the mixed-grain is photo-decomposed to produce highly fluorescent silver nanoclusters (Ag n ) which decorate the Ag 2 SO 4 crystals. The Ag 2 SO 4 salt offers a stable matrix for the photo-decomposed Ag n nanoclusters to emit their strong fluorescence.

AB - Here we report on the production of an Ag 2 SO 4 /Ag 2 O mixed-grain powder during the anodization of Ag foil in a HF-H 2 SO 4 electrolyte. We propose that there are three competing reactions during the anodization process: (i) the production of Ag 2 O at the Ag foil anode surface from the presence of water in the electrolyte, (ii) the dissolution of the Ag 2 O in the presence of HF releasing Ag + ions, (iii) the precipitation of Ag + and SO 4 2- ions, as Ag 2 SO 4 on the Ag foil anode surface. This co-precipitation/dissolution process ultimately results in a mixed-grain powder. We then show that the Ag 2 O embedded within the mixed-grain is photo-decomposed to produce highly fluorescent silver nanoclusters (Ag n ) which decorate the Ag 2 SO 4 crystals. The Ag 2 SO 4 salt offers a stable matrix for the photo-decomposed Ag n nanoclusters to emit their strong fluorescence.

KW - Electrochemistry

KW - Fluorescence

KW - Silver nanoclusters

KW - Silver sulphate/silver oxide mixed-grain powder

UR - http://www.scopus.com/inward/record.url?scp=84875225652&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2012.12.097

DO - 10.1016/j.apsusc.2012.12.097

M3 - Article

SN - 0169-4332

VL - 270

SP - 77

EP - 81

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Ag2SO4 decorated with fluorescent Agn nanoclusters

Abstract

Keywords

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