2001
DOI: 10.1016/s0009-2614(01)00535-8
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Multiple bonding structures of C2H2 chemisorbed on Si(100)

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Cited by 76 publications
(80 citation statements)
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“…The first geometry is well known from the adsorption of other organic molecules, e.g., C 2 H 2 or C 2 H 4 on Si(0 0 1) [14][15][16][17][18][19][20][21][22][23][24][25]11,26]. The latter geometry was discussed controversially in case of C 2 H 2 / Si(0 0 1) [27,28,14,15,29,17]. Because of the experimental results at low cyclooctyne coverage, the tetra-r geometry, if it exists, should be much more favorable than the adsorption in the di-r geometry which then should only occur next to an already adsorbed molecule.…”
Section: Discussionmentioning
confidence: 99%
“…The first geometry is well known from the adsorption of other organic molecules, e.g., C 2 H 2 or C 2 H 4 on Si(0 0 1) [14][15][16][17][18][19][20][21][22][23][24][25]11,26]. The latter geometry was discussed controversially in case of C 2 H 2 / Si(0 0 1) [27,28,14,15,29,17]. Because of the experimental results at low cyclooctyne coverage, the tetra-r geometry, if it exists, should be much more favorable than the adsorption in the di-r geometry which then should only occur next to an already adsorbed molecule.…”
Section: Discussionmentioning
confidence: 99%
“…27,35 Three possible adsorption geometries of C 2 H 4 on group IV (100) surfaces are shown in Figure 1 and have been considered here: (a) on-top (OT), (b) single end-bridge (SEB), and (c) paired end-bridge (PEB) configurations. The configuration of a C 2 H 4 molecule bonded on top of each surface dimer (OT) has been the most popular structure model on both Si(100) 11,21,[36][37][38] and Ge(100). 27,28,35 However, a recent first-principles study of C 2 H 4 on Ge(100) has considered other adsorption geometries, including an end-bridge configuration where C 2 H 4 molecules bridge two neighboring dimers within the same dimer row as shown in Figure 1, parts b and c. 35 Using temperature programmed desorption (TPD) spectroscopy and multiple internal reflection Fourier transform infrared (MIR-FTIR) spectroscopy, Bent and co-workers reported that ethylene desorbs from Ge(100) with two types of desorption features and suggested that although C 2 H 4 chemisorbs on Ge-(100) in only one adsorption configuration (OT) at room temperature, a second adsorption configuration that could not be identified arises during the heating process of thermal desorption experiments.…”
Section: Introductionmentioning
confidence: 99%
“…There are many studies of the adsorption of small organic molecules on clean Si(0 0 1), most of them concerned to acetylene and ethylene [10][11][12][13][14][15][16][17]. They can be considered as prototype systems of the adsorption of alkyne and alkene molecules, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…1) in a configuration usually termed di-r structure. However, more recent scanning tunneling microscopy (STM) experiments have reveled that the Si(0 0 1)/acetylene surface is more complex, with at least three different binding geometries for the adsorption of acetylene on Si(0 0 1) [17,18]. The first geometry was assigned to the di-r structure, while the second one to the end bridge structure in which acetylene adsorbs between and at the end of two adjacent dimers.…”
Section: Introductionmentioning
confidence: 99%