Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 18, Issue 46, Pages 31600-31605Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp06749b
Keywords
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Funding
- World Premier International Research Center Initiative (WPI)
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
- JSPS KAKENHI Grant [24241047, 16H03829]
- Grants-in-Aid for Scientific Research [26286040, 16H03829] Funding Source: KAKEN
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Single crystal sapphire and diamond surfaces are used as planar, atomically flat insulating surfaces, for the deposition of the diacetylene compound 10,12-nonacosadiynoic acid. The surface assembly is compared with results on hexagonal boron nitride (h-BN), highly oriented pyrolytic graphite (HOPG) and MoS2 surfaces. A perfectly flat-lying monolayer of 10,12-nonacosadiynoic acid self-assembles on h-BN like on HOPG and MoS2. On sapphire and oxidized diamond surfaces, we observed assemblies of standing-up molecular layers. Surface assembly is driven by surface electrostatic dipoles. Surface polarity is partially controlled using a hydrogenated diamond surface or totally screened by the deposition of a graphene layer on the sapphire surface. This results in a perfectly flat and organized SAM on graphene, which is ready for on-surface polymerization of long and isolated molecular wires under ambient conditions.
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