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  Interaction between core and protection shell of N(butyl)4Cl- and N(octyl)4Cl-stabilized Pd colloids

Bucher, S., Hormes, J., Modrow, H., Brinkmann, R., Waldöfner, N., Bönnemann, H., et al. (2002). Interaction between core and protection shell of N(butyl)4Cl- and N(octyl)4Cl-stabilized Pd colloids. Surface Science, 497(1-3), 321-332. doi:10.1016/S0039-6028(01)01663-6.

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 Creators:
Bucher, S.1, Author
Hormes, J.1, Author
Modrow, H.1, Author
Brinkmann, R.2, Author              
Waldöfner, N.2, Author              
Bönnemann, H.2, Author              
Beuermann, L.1, Author
Krischok, S.1, Author
Maus-Friedrichs, W.1, Author
Kempter, V.1, Author
Affiliations:
1Univ Bonn, Inst Phys, Nussallee 12, D-53115 Bonn, Germany; Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA; Tech Univ Clausthal, Inst Phys & Phys Technol, D-38678 Clausthal Zellerfeld, Germany, ou_persistent22              
2Research Group Bönnemann, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445600              

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Free keywords: metastable induced electron spectroscopy (MIES); visible and ultraviolet photoelectron spectroscopy; near edge extended; X- ray absorption fine structure (NEXAFS) chlorine; palladium; clusters
 Abstract: We present X-ray absorption near edge structure (XANES) measurements on N(butyl)(4)Cl- and N(octyl)(4)Cl-stabilized Pd colloids at both the Pd L-III- and the Cl K-edge. Metastable impact electron spectroscopy (MIES) and ultraviolet photoelectron spectroscopy (HeI) results for these colloids, deposited on silica substrates, are also shown. The results provide detailed insight into the mechanism of bonding between the protection shell and the colloidal core, Both XANES and MIES suggest that the chlorine is present on the inside of the protection shell, located between palladium core and N(alkyl)(4) groups forming the protection shell. Moreover, the XANES results suggest a dependence of the equilibrium position of the chlorine between the metal core and the alkyl chain on the length of the alkyl chains, The possible motivation for such an effect is discussed on the basis of different models. MIES, in addition, provides information on the thermal stability of the shell-stabilized Pd colloids. (C) 2001 Elsevier Science B.V. All rights reserved

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Language(s): eng - English
 Dates: 2002-01-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 20170
DOI: 10.1016/S0039-6028(01)01663-6
ISI: 000173737200033
 Degree: -

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Title: Surface Science
  Alternative Title : Surf. Sci.
Source Genre: Journal
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Pages: - Volume / Issue: 497 (1-3) Sequence Number: - Start / End Page: 321 - 332 Identifier: ISSN: 0039-6028