Synthesis of Covalently Linked Molecular Bridges between Silicon Electrodes in CMOS-Based Arrays of Vertical Si/SiO2/Si Nanogaps


  • This work was supported by the Engineering and Physical Sciences Research Council, Technology Strategy Board and EC FP7 ITN “FUNMOLS” project no. 212942. CMOS=complementary metal-oxide semiconductor.


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Silicon nanogaps were bridged in situ by grafting 4-ethynylbenzaldehyde to activate the electrodes and coupling 2,6-diaminoanthra-9,10-quinone to link the coatings. The bridged structures exhibit currents of 11–14 nA at 1 V. The process is reversed by soaking in acidified solution, which causes the current to diminish.