DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Se-Hun | - |
dc.contributor.advisor | 김세훈 | - |
dc.contributor.author | Jung, Soon-Jung | - |
dc.contributor.author | 정순정 | - |
dc.date.accessioned | 2011-12-13T04:49:38Z | - |
dc.date.available | 2011-12-13T04:49:38Z | - |
dc.date.issued | 2004 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=237865&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/31979 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 화학과, 2004.2, [ vi, 39 p. ] | - |
dc.description.abstract | The adsorption of purine on Ge(100) has been investigated using Auger electron spectroscopy (AES), temperature-programmed desorption (TPD), scanning tunneling microscopy (STM) and the density functional theory (DFT) calculation. From the ratio of C(KLL) / Ge(MNN) Auger peak intensities, we find that the surface coverage of purine molecules increases with increasing the exposure and reached saturation after the dosing of 8 minutes (θ = 0.25 ML). In TPD spectra, both chemisorbed and physisorbed purine molecules are observed to be present at the temperature of 110 K. Chemisorbed purine molecularly desorbs at 620 K while physisorbed purine at 140 K. It is also found that Purine molecularly desorbed following the first order kinetics, and the desorption energy is 38.67 kcal/mol. The STM image shows that the adsorbed purine molecules reside between the the buckled dimmer rows and bind to the down Ge atoms of the dimers forming local c(4×2) and p(2×2) reconstructions. Accordiong to the DFT calculation based on a four-dimer Ge cluster, the energetcially most stable adsorption geometry is that purine is chemisorbed on Ge(100) making two dative bonds between two N-atoms of purine and down atoms in Ge dimer. These results are in good agreement with the the experimental results. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | TPD | - |
dc.subject | STM | - |
dc.subject | GE(100) | - |
dc.subject | PURINE | - |
dc.subject | AES | - |
dc.subject | 오제전자분광법 | - |
dc.subject | 열탈착분광법 | - |
dc.subject | 주사터널링 현미경 | - |
dc.subject | 게르마늄 | - |
dc.subject | 퓨린 | - |
dc.title | (The) adsorption structure of purine on the Ge(100) surface | - |
dc.title.alternative | Ge(100)표면 위의 purine 분자의 흡착에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 237865/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 020023556 | - |
dc.contributor.localauthor | Kim, Se-Hun | - |
dc.contributor.localauthor | 김세훈 | - |
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