XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules

J. M. Ramallo-López; L. Giovanetti; A. F. Craievich; F. C. Vicentin; M. Marín-Almazo; M. José-Yacaman; F. G. Requejo

doi:10.1016/j.physb.2006.07.044

XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules

J. M. Ramallo-López, L. Giovanetti, A. F. Craievich, F. C. Vicentin, M. Marín-Almazo, M. José-Yacaman, F. G. Requejo

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

28 Scopus citations

Abstract

We report a structural characterization of palladium nanoparticles, with an average diameter of 1.2 nm, capped with three different n-alkyl thiol molecules (n=12, 16 and 18). For this purpose several experimental techniques were used, namely X-ray absorption fine structure (XAFS), small angle X-ray scattering (SAXS) and high-resolution electron transmission microscopy (HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in each sample. The effects of sulfur-palladium interaction on the structural and electronic properties of the studied material were derived from XAFS results. This study indicates the presence of sulfurized palladium in the bulk of the three studied capped Pd nanoparticles. Slight variations in the degree of sulfidation were detected for nanoclusters with different thiol chain lengths.

Original language	English (US)
Pages (from-to)	150-154
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	389
Issue number	1
DOIs	https://doi.org/10.1016/j.physb.2006.07.044
State	Published - Feb 1 2007
Externally published	Yes

Keywords

HRTEM
Palladium nanoparticles
SAXS
XAFS

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.07.044

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title = "XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules",

abstract = "We report a structural characterization of palladium nanoparticles, with an average diameter of 1.2 nm, capped with three different n-alkyl thiol molecules (n=12, 16 and 18). For this purpose several experimental techniques were used, namely X-ray absorption fine structure (XAFS), small angle X-ray scattering (SAXS) and high-resolution electron transmission microscopy (HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in each sample. The effects of sulfur-palladium interaction on the structural and electronic properties of the studied material were derived from XAFS results. This study indicates the presence of sulfurized palladium in the bulk of the three studied capped Pd nanoparticles. Slight variations in the degree of sulfidation were detected for nanoclusters with different thiol chain lengths.",

keywords = "HRTEM, Palladium nanoparticles, SAXS, XAFS",

author = "Ramallo-L{\'o}pez, {J. M.} and L. Giovanetti and Craievich, {A. F.} and Vicentin, {F. C.} and M. Mar{\'i}n-Almazo and M. Jos{\'e}-Yacaman and Requejo, {F. G.}",

note = "Funding Information: We acknowledge ININ which has been supported by the project CM-311 and Grant from Welch Foundation. This work was partially financed by LNLS (projects XAS 2993/04, SAXS1-4137/05 and SXS 2311/03), CIAM Proc. No. 492664/2004, Brazil and Fundaci{\'o}n Antorchas (Project 14116-120), ANPCYT (PICT 06-17492) and CONICET (PIP 6075 and CIAM Collaborative Project), Argentina.",

year = "2007",

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doi = "10.1016/j.physb.2006.07.044",

language = "English (US)",

volume = "389",

pages = "150--154",

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T1 - XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules

AU - Ramallo-López, J. M.

AU - Giovanetti, L.

AU - Craievich, A. F.

AU - Vicentin, F. C.

AU - Marín-Almazo, M.

AU - José-Yacaman, M.

AU - Requejo, F. G.

N1 - Funding Information: We acknowledge ININ which has been supported by the project CM-311 and Grant from Welch Foundation. This work was partially financed by LNLS (projects XAS 2993/04, SAXS1-4137/05 and SXS 2311/03), CIAM Proc. No. 492664/2004, Brazil and Fundación Antorchas (Project 14116-120), ANPCYT (PICT 06-17492) and CONICET (PIP 6075 and CIAM Collaborative Project), Argentina.

PY - 2007/2/1

Y1 - 2007/2/1

N2 - We report a structural characterization of palladium nanoparticles, with an average diameter of 1.2 nm, capped with three different n-alkyl thiol molecules (n=12, 16 and 18). For this purpose several experimental techniques were used, namely X-ray absorption fine structure (XAFS), small angle X-ray scattering (SAXS) and high-resolution electron transmission microscopy (HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in each sample. The effects of sulfur-palladium interaction on the structural and electronic properties of the studied material were derived from XAFS results. This study indicates the presence of sulfurized palladium in the bulk of the three studied capped Pd nanoparticles. Slight variations in the degree of sulfidation were detected for nanoclusters with different thiol chain lengths.

AB - We report a structural characterization of palladium nanoparticles, with an average diameter of 1.2 nm, capped with three different n-alkyl thiol molecules (n=12, 16 and 18). For this purpose several experimental techniques were used, namely X-ray absorption fine structure (XAFS), small angle X-ray scattering (SAXS) and high-resolution electron transmission microscopy (HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in each sample. The effects of sulfur-palladium interaction on the structural and electronic properties of the studied material were derived from XAFS results. This study indicates the presence of sulfurized palladium in the bulk of the three studied capped Pd nanoparticles. Slight variations in the degree of sulfidation were detected for nanoclusters with different thiol chain lengths.

KW - HRTEM

KW - Palladium nanoparticles

KW - SAXS

KW - XAFS

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XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules

Abstract

Keywords

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