TY  - JOUR
AB  - The bottom-up construction of functional devices from molecular building blocks offers great potential in tailoring materials properties and functionality with utmost control. An important step toward exploiting bottom-up construction for real-life applications is the creation of covalently bonded structures that provide sufficient stability as well as superior charge transport properties over reversibly linked self-assembled structures. On-surface synthesis has emerged as a promising strategy for fabricating stable, covalently bound molecular structure on surfaces. So far, a majority of the structures created by this method have been obtained from a rather simple one-step processing approach. But the on-surface preparation of complex structures will require the possibility to carry out various reaction steps in a sequential manner as done In solution chemistry. Only one example exists in literature in which a hierarchical strategy is followed to enhance structural complexity and reliability on a metallic surface. Future molecular electronic application will, however, require transferring these strategies to nonconducting surfaces. Bulk insulating substrates are known to pose significant challenges to on-surface synthesis due to the absence of a metal catalyst and their low surface energy, frequently resulting In molecule desorption rather than reaction activation. By carefully selecting a suitable precursor molecule, we succeeded in performing a two-step linking reaction on a bulk Insulating surface. Besides a firm anchoring toward the substrate surface, the reaction sites and sequential order are encoded In the molecular structure, providing so far unmatched reaction control in on-surface synthesis on a bulk insulating substrate.
DA  - 2013
DO  - 10.1021/nn402018w
KW  - on-surface synthesis
KW  - bulk insulating substrate
KW  - noncontact atomic force
KW  - microscopy
LA  - eng
IS  - 6
M2  - 5614
PY  - 2013
SN  - 1936-0851
SP  - 5614-5620
T2  - ACS Nano
TI  - Sequential and Site-Specific On-Surface Synthesis on a Bulk Insulator
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29138046
Y2  - 2024-11-22T01:59:54
ER  -