| AVS 62nd International Symposium & Exhibition | |
| Surface Science | Tuesday Sessions |
| Session SS+AS+EN+NS-TuM |
| Session: | Nanostructures, Nanoplasmonics and Surface Reactions |
| Presenter: | Jun Wang, Oak Ridge National Laboratory |
| Authors: | J. Wang, Oak Ridge National Laboratory P. Bonnesen, Oak Ridge National Laboratory E. Rangel, Universidad Autónoma del Estado de Hidalgo, Mexico E. Vallejo, Universidad Autónoma del Estado de Hidalgo, Mexico A. Sanchez-Castillo, Universidad Autónoma del Estado de Hidalgo, Mexico H.J. Cleaves, Tokyo Institute of Technology, Japan A.P. Baddorf, Oak Ridge National Laboratory B. Sumpter, Oak Ridge National Laboratory M. Pan, Oak Ridge National Laboratory P. Maksymovych, Oak Ridge National Laboratory M. Fuentes-Cabrera, Oak Ridge National Laboratory |
| Correspondent: | Click to Email |
We report on an extraordinary large-scale surface-mediated molecular self-assembly of a flexible nucleoside analogue into a well-organized hydrogen-bonded polymer on Au(111). The nucleoside analogue is (RS)-N9-(2,3-Dihydroxypropyl)Adenine (R,S-DHPA), and it consists of the Adenine nucleobase and a tethered glycol group. Employing scanning tunneling microscopy and density functional theory calculations we show that the polymer primarily self-assembles along the Au(111) herringbone reconstruction pattern and extends to the micrometer scale and beyond. The profound propensity toward self-assembly in this case arises from the properties of the glycol moiety of the R,S-DHPA molecule: it is linear and flexible, and these features, together with the specific ways in which the glycol and the Adenine moieties can hydrogen bond, confer R,S-DHPA with a superior self-assembly ability. Our results suggest that nucleoside analogues with flexible acyclic groups could provide the means for synthesizing substrate-supported mesoscale hydrogen-bonded polymers.
ACKNOWLEDGEMENTS
This research was conducted at the Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility .