상세정보
학술지
Dissociative Chemisorption of Methanol on Ge(100)
- 저자
- 배성수, 김도환, 김안순, 정순정, 홍석륜, 김세훈
- 발행일
- 200710
- 출처
- The Journal of Physical Chemistry C, v.111 no.41, pp.15013-15019
- ISSN
- 1932-7447
- 출판사
- American Chemical Society(ACS)
- 협약과제
- 07MB2700, 유비쿼터스 건강관리용 모듈 시스템, 박선희
- 초록
- The adsorption of methanol (CH3OH) on Ge(100) surface has been studied using ultrahigh vacuum scanning tunneling microscopy (UHV - STM) and density functional theory (DFT) calculations. At low coverages, high-resolution experimental STM shows that methanol undergoes O - H bond dissociative adsorption on a single Ge - Ge dimer. As the methanol coverage increases to saturation, a series of dissociative adsorptions of methanol results in the formation of dimer row-based chainlike arrays. The DFT calculations show that, at room temperature, O - H bond dissociative adsorption is kinetically more favorable than C - O bond dissociative adsorption, although the final product of C - O bond dissociative adsorption is more stable geometry thermodynamically. From the results of our STM experiments and DFT calculations, we conclude that the adsorption structure of methanol on Ge(100) at room temperature has a H - Ge - Ge - OCH3 geometry as a result of O - H bond dissociative adsorption on a single dimer. © 2007 American Chemical Society.
- KSP 제안 키워드
- Dissociative adsorption, Final product, H bond, High-resolution, Room-temperature, adsorption structure, density functional theory (DFT) calculations, dissociative chemisorption, ultrahigh vacuum scanning tunneling microscopy(UHV-STM)