Temperature dependent electron transport and inelastic electron tunneling spectroscopy of porphyrin molecular junctions

Content Provider	Semantic Scholar
Author	Esposito, Teresa Dinolfo, Peter H. Lewis, Kim M.
Copyright Year	2018
Abstract	Abstract We report electron transport measurements through a metal-molecule-metal junction of free base or zinc porphyrin molecules. Junctions are formed by zig-zag electromigration of a gold nanowire. Inelastic electron tunneling spectroscopy measurements were performed at 4.3 K to confirm the presence of molecules in the junction and to measure the vibrational modes of the molecular junction. Temperature dependent current/voltage measurements are performed in order to determine that the electron conduction mechanism through these molecular junctions is direct tunneling. The electron attenuation coefficient ( β 0 ) was also calculated; the average β 0 for free base and zinc porphyrin was 0.231 ± 0.133 A−1 and 0.188 ± 0.049 A−1, respectively. The barrier height was experimentally found to be 1.6 eV and 1.1 eV for FBP and Zn-P SAMs on Au, respectively.
Starting Page	58
Ending Page	64
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1016/j.orgel.2018.08.040
Alternate Webpage(s)	http://homepages.rpi.edu/~dinolp/publications/33_RPI_OrgEl_2018_j.orgel.2018.08.040.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.orgel.2018.08.040
Volume Number	63
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article