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Room-temperature single molecular memory
Author(s) -
Shinya Kano,
Yasuyuki Yamada,
Kentaro Tanaka,
Yutaka Majima
Publication year - 2012
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3679127
Subject(s) - porphyrin , scanning tunneling microscope , derivative (finance) , materials science , coulomb blockade , scanning tunneling spectroscopy , conductance , chemistry , optoelectronics , photochemistry , voltage , nanotechnology , transistor , condensed matter physics , physics , financial economics , economics , quantum mechanics
Single molecular memory operation was observed on a porphyrin derivative by scanning tunneling microscopy at room temperature. A porphyrin derivative with four disulfide groups was chemically synthesized and chemisorbed on a Au(111) surface. Coulomb blockade behaviors and switching behaviors in current-voltage (I-V) characteristics were observed on a single porphyrin derivative by scanning tunneling spectroscopy. Based on the switching behaviors, the memory operation of electrical conductance in the porphyrin derivative was demonstrated by applying a programmed pulse sequence with an on/off ratio of 2.9 at room temperature.

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