Abstract
Individual molecules have been demonstrated to exhibit promising applications as functional components in the fabrication of computing nanocircuits. Based on their advantage in chemical tailorability, many molecular devices with advanced electronic functions have been developed, which can be further modulated by the introduction of external stimuli. Here, orthogonally modulated molecular transport junctions are achieved via chemically fabricated nanogaps functionalized with dithienylethene units bearing organometallic ruthenium fragments. The addressable and stepwise control of molecular isomerization can be repeatedly and reversibly completed with a judicious use of the orthogonal optical and electrochemical stimuli to reach the controllable switching of conductivity between two distinct states. These photo-/electro-cooperative nanodevices can be applied as resettable electronic logic gates for Boolean computing, such as a two-input OR and a three-input AND-OR. The proof-of-concept of such logic gates demonstrates the possibility to develop multifunctional molecular devices by rational chemical design.
Highlights
Individual molecules have been demonstrated to exhibit promising applications as functional components in the fabrication of computing nanocircuits
Since the first molecular rectifier proposed in 1974, functional devices developed with individual molecules as functional components have exhibited promising applications in the fabrication of computing nanocircuits
In a recent work[44], we showed that the bimetallic compound 1 bearing two ruthenium fragments [AcS–C6H4–CC(dppe)2Ru] þ (dppe 1⁄4 1,2-bis(diphenylphosphino)ethane) on either ends of a DTE unit exhibits the reversible photo-controllable switching of conductivity when placed within a pair of gold nanoelectrodes fabricated by on-wire lithography (OWL)[45,46,47]
Summary
Individual molecules have been demonstrated to exhibit promising applications as functional components in the fabrication of computing nanocircuits Based on their advantage in chemical tailorability, many molecular devices with advanced electronic functions have been developed, which can be further modulated by the introduction of external stimuli. The addressable and stepwise control of molecular isomerization can be repeatedly and reversibly completed with a judicious use of the orthogonal optical and electrochemical stimuli to reach the controllable switching of conductivity between two distinct states With a judicious choice of photo-/electroinputs, OR and AND-OR Boolean computing are achieved within the orthogonally modulated MTJs
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