Scanning tunneling microscopy study of platinum deposited on graphite by metalorganic chemical vapor deposition

Ngo, Tue; Brandt, Lutz; Williams, R. Stanley; Kaesz, H. D.

doi:10.1016/0039-6028(93)90458-v

Cited by 23 publications

(15 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermal decomposition of MeCpPtMe 3 has been reported to occur at 240 °C, while the initial crystal growth of platinum from the precursors on a highly oriented pyrolytic graphite was observed at 190 °C [34]. In contrast, in our case using the SCF-MOCFD method, the formation of Pt nanoparticles on the surface of carbon nanostructures occurred at relatively low temperatures above 120 °C as shown in Figure 9(a).…”

Section: Discussionmentioning

confidence: 60%

Preparation of Dispersed Platinum Nanoparticles on a Carbon Nanostructured Surface Using Supercritical Fluid Chemical Deposition

Hiramatsu

Hori

2010

Materials

View full text Add to dashboard Cite

We have developed a method of forming platinum (Pt) nanoparticles using a metal organic chemical fluid deposition (MOCFD) process employing a supercritical fluid (SCF), and have demonstrated the synthesis of dispersed Pt nanoparticles on the surfaces of carbon nanowalls (CNWs), two-dimensional carbon nanostructures, and carbon nanotubes (CNTs). By using SCF-MOCFD with supercritical carbon dioxide as a solvent of metal-organic compounds, highly dispersed Pt nanoparticles of 2 nm diameter were deposited on the entire surface of CNWs and CNTs. The SCF-MOCFD process proved to be effective for the synthesis of Pt nanoparticles on the entire surface of intricate carbon nanostructures with narrow interspaces.

show abstract

Section: Discussionmentioning

confidence: 60%

Preparation of Dispersed Platinum Nanoparticles on a Carbon Nanostructured Surface Using Supercritical Fluid Chemical Deposition

Hiramatsu

Hori

2010

Materials

View full text Add to dashboard Cite

show abstract

“…21 Interaction between the fivefold coordinated Ti cation and the Pt precursor enhanced the decomposition, as suggested by previous studies of Pt-layer growth on other surfaces. 58,59 The Pt particles widely distributed on terraces and no preference to step edges was observed in contrast to the case of metal-vapor deposition on TiO 2 (110) such as Ag, 60 Cu, 61 and Pd. 2 Average diameter and height (measured from the Ti rows) of the Pt particles determined from the STM image were 1.41 AE 0.04 nm and 0.18 AE 0.02 nm, respectively.…”

Section: Resultsmentioning

confidence: 95%

“…Promotion of the rate of Pt particle growth was observed during MOCVD due to autocatalysis by successively deposited fresh Pt. 58 Thus, we can expect that small Pt clusters formed by decomposition of MeCpPtMe 3 on TiO 2 (110) serve as active sites for decomposition of remaining MeCpPtMe 3 precursors on the surface. To confirm the possibility, a cycle of adsorption of MeCpPtMe 3 on TiO 2 (110) at RT and annealing at 450 K for 1 h was repeated for one sample and measured the surface by STM.…”

Section: Resultsmentioning

confidence: 99%

Dynamic aspects and associated structures of TiO2(110) and CeO2(111) surfaces relevant to oxide catalyses

Fukui

Takakusagi

Tero

et al. 2003

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

This article gives a topical review of the dynamic behavior of surface species on two representative metal oxide surfaces of TiO 2 (110) and CeO 2 (111) investigated by scanning tunneling microscopy (STM) and noncontact atomic force microscopy (NC-AFM). In addition, two new aspects, the self-limiting growth of Pt nanoparticles from MeCpPtMe 3 on TiO 2 (110) regulated by a competitive reaction with TiO x suboxides and the inhomogeneous reactivity of surface oxygen atoms on CeO 2 (111) against methanol, are also imaged by STM and NC-AFM, which are relevant to key issues to understand the surface chemical reactivity and catalysis.

show abstract

“…[34][35][36][37][38] STM has found increasing use for both metal and polymer thin films. [39][40][41][42] Because the tunneling There are a number of techniques for investigating the morphology of surfaces. As mentioned precurrent is very sensitive to the distance between the substrate and the probe, STM is not well viously, however, the techniques for surface profile evaluation and for quantitative coating thickness suited for large areas or rough surfaces.…”

Section: Morphological Analysismentioning

confidence: 99%

Confocal scanning laser microscopy of polymer coatings

Ling

Pritzker

Byerley

et al. 1998

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

ABSTRACT:A new nondestructive technique, confocal scanning laser microscopy (CSLM), is described that is used to characterize the topography and morphology of polymer coatings. The topography of the coating can be determined even when the coating is completely opaque. When the coating is not completely opaque, CSLM has the distinct advantage of also being able to distinguish between the coating surface and the substrate, thus enabling coating thickness to be determined over a wide range of areas. In this study CSLM was successfully applied to poly(2-vinylpyridine) coatings formed on mild steel substrates by in situ electropolymerization. Satisfactory morphological details were obtained for areas ranging from 200 1 200 mm to 4 1 4 mm. Quantitative measurements of the coating thickness and the surface roughness distribution were also carried out. Although several other nondestructive techniques for coating morphological analyses are available, CSLM has unique advantages in being able to provide simultaneous qualitative and quantitative information on coating surfaces as well as measurements over a wide range of surface areas. A comparison of CSLM with other popularly used methods is provided and the characteristics and limitations of the various techniques are discussed.

show abstract

Scanning tunneling microscopy study of platinum deposited on graphite by metalorganic chemical vapor deposition

Cited by 23 publications

References 34 publications

Preparation of Dispersed Platinum Nanoparticles on a Carbon Nanostructured Surface Using Supercritical Fluid Chemical Deposition

Preparation of Dispersed Platinum Nanoparticles on a Carbon Nanostructured Surface Using Supercritical Fluid Chemical Deposition

Dynamic aspects and associated structures of TiO2(110) and CeO2(111) surfaces relevant to oxide catalyses

Confocal scanning laser microscopy of polymer coatings

Contact Info

Product

Resources

About