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Molecular‐Scale Logic Gates
Author(s) -
de Silva A. Prasanna,
McClenaghan Nathan D.
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200305054
Subject(s) - reconfigurability , logic gate , molecular switch , nanotechnology , molecular electronics , and gate , materials science , fluorescence , oligonucleotide , computer science , chemistry , optoelectronics , molecule , physics , dna , optics , telecommunications , algorithm , biochemistry , organic chemistry
Abstract Currently available approaches to molecular‐scale logic gates are summarized and compared. These include: chemically‐controlled fluorescent and transmittance‐based switches concerned with small molecules, DNA oligonucleotides with fluorescence readout, oligonucleotide reactions with DNA‐based catalysts, chemically‐gated photochromics, reversibly denaturable proteins, molecular machines with optical and electronic signals, two‐photon fluorophores and multichromophoric transient optical switches. The photochemical principles of electron and energy transfer are involved in several of these approaches. More complex molecular logic systems with reconfigurability and superposability provide contrasts with current semiconductor electronics. Integration of simple logic functions to produce more complex ones is also discussed in terms of recent developments.