Surface force analysis of glycine adsorption on different crystal surfaces of titanium dioxide (TiO2)

Nano Convergence

Taka-aki Yano¹  Masahiko Hara¹  Narangerel Ganbaatar¹  Kanae Imai² 

[1] Chemical Evolution Lab Unit, Earth-Life Science Institute (ELSI), Tokyo Institute of Technology;Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology;

关键词: Atomic force microscopy (AFM);    Titanium dioxide (TiO2);    Glycine;    Chemical evolution;    Origins of life;   

DOI  :  10.1186/s40580-017-0125-y

来源: DOAJ

【 摘 要 】

Abstract Surface force analysis with atomic force microscope (AFM) in which a single amino acid residue was mounted on the tip apex of AFM probe was carried out for the first time at the molecular level on titanium dioxide (TiO2) as a representative mineral surface for prebiotic chemical evolution reactions. The force analyses on surfaces with three different crystal orientations revealed that the TiO2 (110) surface has unique characteristics for adsorbing glycine molecules showing different features compared to those on TiO2 (001) and (100). To examine this difference, we investigated thermal desorption spectroscopy (TDS) and the interaction between the PEG cross-linker and the three TiO2 surfaces. Our data suggest that the different single crystal surfaces would provide different chemical evolution field for amino acid molecules.

【 授权许可】

Unknown