Title :
A meso-pyridyl porphyrin self-assembled monolayer on gold substrates for molecular electronics applications
Author :
Sathyapalan, Amarchand ; Lohani, Anup ; Santra, Sangita ; Ravikanth, M. ; Mukherji, Soumyo ; Rao, V. Ramgopal
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Mumbai, India
Abstract :
In this paper, we report the formation of meso-pyridyl porphyrin self assembled monolayers on a gold substrate, its surface topography by AFM and its electrical characteristics by STS. The self-assembly was accomplished by thiol bonding the molecule from solution to a thermally evaporated gold substrate. Formation of SAMs was confirmed by high resolution AFM. It showed a basic hexagonal well ordered self-assembled monolayers of the molecule. Room temperature current-voltage (I-V) spectra by STS were collected to study the conductance properties of the SAMs. We anticipate the potential application of these SAMs for memory applications, and detailed characterizations are currently under progress.
Keywords :
atomic force microscopy; electric admittance; molecular electronics; monolayers; organic compounds; scanning tunnelling microscopy; self-assembly; surface topography; 293 to 298 K; Au; conductance properties; current-voltage spectra; electrical characteristics; high resolution atomic force microscopy; memory applications; mesopyridyl porphyrin self-assembled monolayers; molecular electronics applications; room temperature; scanning tunneling spectroscopy; surface topography; thermally evaporated gold substrate; thiol bonding; Atomic force microscopy; Atomic layer deposition; Electric variables; Gold; Molecular electronics; Self-assembly; Sociotechnical systems; Substrates; Surface topography; Temperature;
Conference_Titel :
Nanotechnology, 2005. 5th IEEE Conference on
Print_ISBN :
0-7803-9199-3
DOI :
10.1109/NANO.2005.1500739
