Adsorption Configuration of Serine on Ge(100): Competition between the Hydroxymethyl and Carboxyl Groups of Serine During the Adsorption Reaction

Yang, Sena; Kim, Yaewon; Park, Sunmin; Lim, Heesun; Lee, Hangil

doi:10.1021/jp200866f

Cited by 13 publications

(16 citation statements)

References 20 publications

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“…The N 1s core-level spectrum of ~0.2 ML Leu on the Cu(110) surface in Figure 2b showed a single peak at 398.5 eV (marked as N1). Considering the binding energy, N1 was assigned to the neutral N atom in the Leu molecule [20][21][22]. The N 1s core-level spectrum obtained for ~0.20 ML Tyr Concurrently, the changes in the N 1s and O 1s core-level spectra at the~0.20 ML level of coverage were determined using the same methods for the two amino acids adsorbed on the Cu(110) surface.…”

Section: Resultsmentioning

confidence: 99%

Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface

Lee

Kim

2020

Applied Sciences

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The structures and stability levels of leucine (Leu) and tyrosine (Tyr) adsorbed on a Cu(110) surface, at initial levels of coverage (less than 0.25 monolayer), were investigated using reflection-absorption infrared spectroscopy and high-resolution photoemission spectroscopy (HRPES), as well as by performing density functional theory calculations. At an initial coverage, the O-H dissociation bonded structure was indicated from the spectral results to be the most favorable structure for Leu adsorbed on the Cu(110) surface, whereas the O-H dissociated-N dative bonded structure was most favorable for adsorbed Tyr. These models were further supported by the results of experiments, in which the systems were exposed to other molecules and HRPES was used to monitor whether the amine or carboxylic groups of the adsorbed amino acids became reactive.

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Section: Resultsmentioning

confidence: 99%

Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface

Lee

Kim

2020

Applied Sciences

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“…We first acquired the C 1s core-level spectra of a Ge(100) surface covered by 0.30 ML homocysteine. [16][17][18] Figure 1 b, f shows the analysis of the S 2p core-level spectra which were obtained at the same two distinct coverage levels. Considering the relationship between electronegativity and binding energy, we assigned the bonding features C1, C2, C3, and C4 to ÀCH 2 ÀCH 2 (CH) (284.4 eV), ÀCH 2 ÀSH, (285.2 eV), ÀCHÀNH 2 + (285.9 eV), and ÀCOO À (288.7 eV), respectively.…”

Section: Resultsmentioning

confidence: 99%

“…A new peak (marked C3') emerges at 286.2 eV, indicating a change in bonding due to the formation of a new adsorption structure. [15][16][17] Figure 1 f shows the N 1s core-level spectrum obtained at a coverage of 0.60 ML. [15] This observation suggests that the electronic state (or electronic charge) of the amine group changes from positive (C3 and N1) to neutral (C3' and N2).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the peak is expected to shift to higher binding energies. [16][17][18] Figure 1 b, f shows the analysis of the S 2p core-level spectra which were obtained at the same two distinct coverage levels. In these figures, the spectrum is characterized by a doublet structure due to the presence of the S 2p 3/2 and S 2p 1/2 peaks.…”

Section: Resultsmentioning

confidence: 99%

“…Peak assignments of previous studies involving N-dative-bonded adsorption structures on Ge(100) surfaces clearly confirm our conclusions. [15][16][17] Figure 1 f shows the N 1s core-level spectrum obtained at a coverage of 0.60 ML. A new peak emerges at 398.7 eV (marked N2), providing critical evidence that a new adsorption structure is present at this coverage level.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption Sequence of Multifunctional Groups: A Study on the Reaction Pathway and the Adsorption Structure of Homocysteine on the Ge(100) Surface

Park

Lee

2013

ChemPhysChem

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We investigated the adsorption mechanism of homocysteine (HS-CH2-CH2-CH(NH2)-COOH) on the Ge(100) surface along with its electronic structures and adsorption geometries to determine the sequence of adsorption of this amino acid's functional groups using core-level photoemission spectroscopy (CLPES) in conjunction with density functional theory (DFT) calculations. We found that the "SH-dissociated OH-dissociated N-dative-bonded structure" and the "SH-dissociated OH-dissociation-bonded structure" were preferred at a monolayer (ML) coverage of 0.30 (lower coverage) and 0.60 (higher coverage), respectively. The "SH-dissociated OH-dissociated N-dative-bonded structure" was the most stable structure. Moreover, we systematically confirmed the sequence of adsorption of the functional groups of the homocysteine molecule on the Ge(100) surface, which is thiol group (-SH), carboxyl group (-COOH), and amine group (-NH2).

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Adsorption of Multifunctional Organic Molecules at a Surface: First Step in Molecular Layer Deposition

Sandoval¹,

Bent²

2018

Encyclopedia of Interfacial Chemistry

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Adsorption Configuration of Serine on Ge(100): Competition between the Hydroxymethyl and Carboxyl Groups of Serine During the Adsorption Reaction

Cited by 13 publications

References 20 publications

Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface

Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface

Adsorption Sequence of Multifunctional Groups: A Study on the Reaction Pathway and the Adsorption Structure of Homocysteine on the Ge(100) Surface

Adsorption of Multifunctional Organic Molecules at a Surface: First Step in Molecular Layer Deposition

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