A comparison of weak molecular adsorption of organic molecules on clean copper and platinum surfaces

Sexton, B.A.; Hughés, A.E.

doi:10.1016/0039-6028(84)90394-7

Cited by 318 publications

(195 citation statements)

References 20 publications

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“…This is consistent with the analysis of n-alkane (Nϭ5 to 10͒ desorption from metal surfaces such as Cu͑100͒. [40][41][42][43] The dependence of peak shape and peak position on factors such as coverage of the n-alkanes resembled that of a simple first-order desorption process in both studies on Cu͑100͒. The T p increased by ϳ4 K when increasing the coverage from 25 to 100% of a monolayer.…”

Section: Fig 2 Tpd Spectra Of Csupporting

confidence: 84%

“…It is important to realize that physically this parameter may include both interaction with the graphite surface and the interactions between adsorbed chains. Previous measurements of the interaction of much shorter alcohols and alkanes with metals such as Ag; 24 Cu, 42,43 and Au 25 have yielded values in the range 5 -6 kJ/mole/CH 2 group. A recent study by Bishop et al has reported segment-surface interaction energies of ϳ8 kJ/mole/CH 2 group for n-alkanes (Nϭ6 to 10͒ adsorbed on Pt͑111͒.…”

Section: Oligomer Desorption Kineticsmentioning

confidence: 99%

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Effects of conformational isomerism on the desorption kinetics of n-alkanes from graphite

Paserba

Gellman

2001

The Journal of Chemical Physics

136

175

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The dynamics of oligomer desorption from surfaces have been studied by measuring the desorption kinetics of a set of n-alkanes from the surface of single crystalline graphite. Desorption rates were measured using a set of 21 monodispersed n-alkanes (C N H 2Nϩ2 ,5рNр60) each adsorbed at coverages in the range Ͻ0.1 to Ͼ1 monolayers. Desorption is observed to be a first-order process with a desorption barrier (⌬E des ‡ ) that is independent of coverage. The pre-exponential of the desorption rate constant is independent of the oligomer chain length and has a value of ϭ10 19.6Ϯ0.5 s Ϫ1 . We also find that ⌬E des ‡ has a nonlinear dependence on chain length and takes the empirical form ⌬E des ‡ ϭaϩbN ␥ , with the exponent having a value of ␥ϭ0.50Ϯ0.01. More interestingly, we have proposed a mechanism for the desorption process and a model for the energetics and the entropy of the oligomers on the surface that provide an extremely good quantitative fit to the observed chain length dependence of ⌬E des ‡ . ⌬E des ‡ is given by the difference in energy between the gas phase n-alkane and the conformation of the adsorbed n-alkane with the minimum free energy at the desorption temperature. These results reveal that conformational isomerism plays a significant role in determining the desorption kinetics of oligomers from surfaces.

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Section: Fig 2 Tpd Spectra Of Csupporting

confidence: 84%

Section: Oligomer Desorption Kineticsmentioning

confidence: 99%

Effects of conformational isomerism on the desorption kinetics of n-alkanes from graphite

Paserba

Gellman

2001

The Journal of Chemical Physics

136

175

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“…6,7,8,10 In particular, only one peak was observed at a temprature of approximately 160 K in the TPD spectrum of H 2 O on Cu(100), indistinguishable from the ice sublimation peak. 9,10 The calculated electronic density of states (DOS) for the clean and the H 2 O-adsorbed Cu(100) surfaces are shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

“…One example is the water-adsorbed Cu(100) surface. 6,7,8,9,10,11,12,13 Copper is an important material for structural, electrical, and electronics applications. Corrosion of copper, which is a source of significant economic losses and occurs both in aqueous environments 14,15 and atmospheric air, 16,17 depends intimately on water adsorption.…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations for the adsorption of water molecules on theCu(100)surface

2004

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First-principles density-functional theory and supercell models are employed to calculate the adsorption of water molecules on the Cu(100) surface. In agreement with the experimental observations, the calculations show that a H2O molecule prefers to bond at a one-fold on-top (T1) surface site with a tilted geometry. At low temperatures, rotational diffusion of the molecular axis of the water molecules around the surface normal is predicted to occur at much higher rates than lateral diffusion of the molecules. In addition, the calculated binding energy of an adsorbed water molecule on the surfaces is significantly smaller than the water sublimation energy, indicating a tendency for the formation of water clusters on the Cu(100) surface.

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“…The fact that only one C 1s peak is observed in either physisorbed or chemisorbed state is consistent with CH 3 CN adsorption on other substrates. [41][42][43][44][45] This may be related to the nature of the molecules. In the gas phase, XPS of acetonitrile 46 shows that the C 1s peaks for C ͑CH 3 ͒ and C ͑CN͒ atoms are separated by less than 0.6 eV.…”

Section: B X-ray Photoelectron Spectroscopymentioning

confidence: 99%

Cycloaddition reaction of furan with Si(100)-2×1

Qiao

Tao

Cao

et al. 2001

The Journal of Chemical Physics

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Articles you may be interested in 1,2-Dibromoethane on Cu(100): Bonding structure and transformation to C2H4 J. Chem. Phys. 135, 064706 (2011) The covalent binding and adsorption states of acetonitrile on Si͑100͒ have been investigated using temperature programmed desorption ͑TPD͒, x-ray photoelectron spectroscopy ͑XPS͒, high-resolution electron energy loss spectroscopy ͑HREELS͒, and density function theory ͑DFT͒ calculation. XPS and HREELS results show that acetonitrile chemisorbs on Si͑100͒ in a side-on di-binding configuration, forming Si-C and Si-N bonds. TPD measurements reveal the presence of two desorption states, ␤1 and ␤2 with desorption energies of 29.8 and 24.6 kcal mol Ϫ1 , respectively. Based on DFT calculations, the ␤1 state is possibly assigned to di-bonded acetonitrile on top of a dimer and/or in an in-row bridging chemisorption, while the ␤2 state is related to acetonitrile bonded in a cross-row bridging configuration.

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A comparison of weak molecular adsorption of organic molecules on clean copper and platinum surfaces

Cited by 318 publications

References 20 publications

Effects of conformational isomerism on the desorption kinetics of n-alkanes from graphite

Effects of conformational isomerism on the desorption kinetics of n-alkanes from graphite

First-principles calculations for the adsorption of water molecules on theCu(100)surface

Cycloaddition reaction of furan with Si(100)-2×1

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