RT Journal Article
T1 Charge Transport in C60-Based Dumbbell-type Molecules: Mechanically Induced Switching between Two Distinct Conductance States
A1 Moreno García, Pavel
A1 La Rosa, Andrea
A1 Kolivoska, Viliam
A1 Bermejo, Daniel
A1 Hong, Wenjing
A1 Yoshida, Koji
A1 Baghernejad, Masoud
A1 Filippone, Salvatore
A1 Broekmann, Peter
A1 Wandlowski, Thomas
A1 Martín, Nazario
AB Single molecule charge transport characteristics of buckminsterfullerene-capped symmetric fluorene-based dumbbell-type compound 1 were investigated by scanning tunneling microscopy break junction (STM-BJ), current sensing atomic force microscopy break junction (CS-AFM-BJ), and mechanically controlled break junction (MCBJ) techniques, under ambient conditions. We also show that compound 1 is able to form highly organized defect-free surface adlayers, allowing the molecules on the surface to be addressed specifically. Two distinct single molecule conductance states (called high GH1 and low GL1) were observed, depending on the pressure exerted by the probe on the junction, thus allowing molecule 1 to function as a mechanically driven molecular switch. These two distinct conductance states were attributed to the electron tunneling through the buckminsterfullerene anchoring group and fully extended molecule 1, respectively. The assignment of conductance features to these configurations was further confirmed by control experiments with asymmetrically designed buckminsterfullerene derivative 2 as well as pristine buckminsterfullerene 3, both lacking the GL feature.
PB ACS
SN 1520-5126
YR 2015
FD 2015-01
LK https://hdl.handle.net/20.500.14352/35072
UL https://hdl.handle.net/20.500.14352/35072
LA eng
NO Unión Europea. FP7
NO European Commission
NO Ministerio de Economía y Competitividad (MINECO)
NO Swiss National Science Foundation
NO German Science Foundation
NO UK EPSRC,
NO CONACyT, Mexico
NO SCIEX
NO Grant Agency of the Czech Republic
NO Alexander von Humboldt Foundation
DS Docta Complutense
RD 9 abr 2025