Photoswitching tripodal single molecular tip for noncontact AFM measurements: synthesis, immobilization, and reversible configurational change on gold surface.
Tripodal molecules consisting of a tetrasubstituted adamantane with three phenylacetylene legs and a reversibly photoswitching apex were designed as "single molecular tips" for both chemical and topographical characterization of the substrate surface. By covalent attachment onto gold-coated AFM tips through three S-Au bonds, these rigid tripodal molecules are expected to act as sharp, robust, and stationary molecular tips whose configuration can be reversibly changed upon irradiation with UV or visible light. In this report, the full account of the syntheses of two photoswitching tripodal molecular tips, their immobilization onto Au(111) surfaces, and the detection of photoinduced configurational change on Au(111) surface by SPM measurements are documented.
Takamatsu
Daiko
D
Department of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
Fukui
Ken-ichi
K
Aroua
Safwan
S
Yamakoshi
Yoko
Y
D001391:Azo Compounds / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D007536:Isomerism; D018625:Microscopy, Atomic Force; D015394:Molecular Structure; D055668:Photochemical Processes; D013499:Surface Properties
D001391:Azo Compounds; D006046:Gold; C009850:azobenzene