STM/TEM comparative study of Pd clusters epitaxially grown on highly oriented pyrolytic graphite

Granjeaud, Samuel; Yckache, K.; Dayez, M.; Humbert, A.; Chapon, C.; Henry, Claude R.

doi:10.1051/mmm:0199300405040900

Cited by 24 publications

(7 citation statements)

References 12 publications

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“…The cluster sizes are reduced by up to 50%, which is a typical convolution factor as shown by a comparison of contact SFM and TEM images [13]. Further, most of the constant height images show lateral cluster shapes which are comparable to previous TEM measurements [36][37][38], on which we will concentrate in the following.…”

Section: S133supporting

confidence: 58%

Imaging nanoclusters in theconstant height modeof the dynamic SFM

et al. 2006

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For the first time, high quality images of metal nanoclusters which were recorded in the constant height mode of a dynamic scanning force microscope (dynamic SFM) are shown. Surfaces of highly ordered pyrolytic graphite (HOPG) were used as a test substrate since metal nanoclusters with well defined and symmetric shapes can be created by epitaxial growth. We performed imaging of gold clusters with sizes between 5 and 15 nm in both scanning modes, constant f mode and constant height mode, and compared the image contrast. We notice that clusters in constant height images appear much sharper, and exhibit more reasonable lateral shapes and sizes in comparison to images recorded in the constant f mode. With the help of numerical simulations we show that only a microscopically small part of the tip apex (nanotip) is probably the main contributor for the image contrast formation. In principle, the constant height mode can be used for imaging surfaces of any material, e.g. ionic crystals, as shown for the system Au/NaCl(001).

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Section: S133supporting

confidence: 58%

Imaging nanoclusters in theconstant height modeof the dynamic SFM

et al. 2006

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“…The TEM topography of the Pd crystallites shown in Figure 6 also resembles that reported elsewhere (Granjeaud et al, 1993).…”

Section: Discussionsupporting

confidence: 64%

Instrumental effects on in situ electrochemical STM studies: An investigation of a current surge induced Pd deposit on HOPG

Tong

Aindow

Farr

1996

Microsc. Res. Tech.

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“…Palladium nanoparticles can be prepared by various deposition methods including chemical reduction of Pd complexes [2], ion exchange [3], vapor deposition [4][5][6], thermal evaporation in vacuum [7,8], and electrochemical deposition [9][10][11][12]. It is well known that the basic properties of impregnated catalysts are strongly affected by the impregnation method, the microstructure, the surface reactivity, and the metal precursor [13,14].…”

Section: Introductionmentioning

confidence: 99%