DOI: 10.1002/bbpc.19940980208. Surface chemistry of colloidal gold: Deposition and reoxidation of Pb, Cd, and Tl

Surface chemistry of colloidal gold: Deposition and reoxidation of Pb, Cd, and Tl

10.1002/bbpc.19940980208

Crossref journal-article

Wiley

Berichte der Bunsengesellschaft für physikalische Chemie (311)

Abstract

AbstractLead, cadmium and thallium are deposited on colloidal gold particles in aqueous solution. The deposition occurs through the reduction of the metal ions by excess electrons which are donated to the gold particles by free organic radicals generated radiolytically. The absorption spectra of the composite particles are measured and compared to calculated ones (using Mie theory and the optical constants of the pure metals). — Au‐Pb particles are stable and well separated, and there is reasonable agreement between experimental and calculated spectra. Reoxidation of the lead mantle by Ag+ ions leads to a silver mantle, although about 5% of the deposited lead is not oxidized; this is attributed to the strong binding of Pb adatoms to the gold surface. The reoxidation of Pb adatoms by Ag+ occurs much more slowly than the oxidation of individual Pbn particles, which is attributed to the more electropositive nature of the deposited metal. — Au‐Cd particles tend to agglomerate, especially when the Cd mantle is reoxidized by Ag+ ions. The resulting Au‐Ag particles contain a large percentage of non‐oxidized cadmium; alloy formation seems to be a possible explanation. — The spectra of Au‐Tl particles are not in good agreement with the calculated ones; it seems that the reduced Tl does not form an even mantle around the Aun particles.

Bibliography

Henglein, F., Henglein, A., & Mulvaney, P. (1994). Surface chemistry of colloidal gold: Deposition and reoxidation of Pb, Cd, and Tl. Berichte Der Bunsengesellschaft FÃ¼r Physikalische Chemie, 98(2), 180â189. Portico.

Authors 3

Frank Henglein (first)
Arnim Henglein (additional)
Paul Mulvaney (additional)

References 27 Referenced 32

10.1002/andp.19083300302
1(b)M.Kerker “The Scattering of Light and Other Electromagnetic Radiation” New York1969. (10.1016/B978-0-12-404550-7.50008-7)
{'key': 'e_1_2_1_2_4', 'volume-title': 'Absorption and Scattering of Light by Small Particles', 'author': 'Bohren C.', 'year': '1983'} / Absorption and Scattering of Light by Small Particles by Bohren C. (1983)
10.1007/BF00615498
10.1557/PROC-164-283
10.1021/j100123a004
10.1021/j100204a056
10.1021/ja00904a001
10.1021/j100105a024
10.1021/j100190a084
10.1002/bbpc.19740780715 / Ber. Bunsenges. Phys. Chem. by Schultze J. W. (1974)
10.1021/la00061a022
10.1021/j100115a056
10.1002/bbpc.19770810604
10.1103/PhysRevB.9.3159
{'key': 'e_1_2_1_13_3', 'first-page': '355', 'volume': '43', 'author': 'Schwarz H.', 'year': '1971', 'journal-title': 'Phys. State Sol. B'} / Phys. State Sol. B by Schwarz H. (1971)
10.1103/PhysRevB.37.8639
10.1063/1.1699834
10.1039/FT9918703881
10.1103/PhysRevB.6.4370
10.1007/BF01323667
10.1063/1.1725733
10.1007/BF01429157
10.1002/bbpc.19760801009
10.1002/bbpc.19930971102
10.1063/1.331552
10.1016/S0022-0728(74)80377-3

Dates

Type	When
Created	13 years, 1 month ago (July 26, 2012, 5:55 a.m.)
Deposited	1 year, 10 months ago (Oct. 24, 2023, 9:47 a.m.)
Indexed	1 year, 6 months ago (Feb. 4, 2024, 6:41 a.m.)
Issued	31 years, 6 months ago (Feb. 1, 1994)
Published	31 years, 6 months ago (Feb. 1, 1994)
Published Online	15 years, 3 months ago (May 8, 2010)
Published Print	31 years, 6 months ago (Feb. 1, 1994)

Funders 0

None

BibTeX

@article{Henglein_1994, title={Surface chemistry of colloidal gold: Deposition and reoxidation of Pb, Cd, and Tl}, volume={98}, ISSN={0005-9021}, url={http://dx.doi.org/10.1002/bbpc.19940980208}, DOI={10.1002/bbpc.19940980208}, number={2}, journal={Berichte der Bunsengesellschaft für physikalische Chemie}, publisher={Wiley}, author={Henglein, Frank and Henglein, Arnim and Mulvaney, Paul}, year={1994}, month=feb, pages={180–189} }

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