Polybiphenylmethylenes: New Polymers for Bistable Organic Switches

Isoindolinone-based molecular switches.

Switches are frequently used to provide external control over the conformation and function of organic and bio-organic molecules. While the use of bistable switches is widespread, multi-stable examples are observed relatively rarely. Reported here is a new class of molecular switch that is capable of forming three stable states of varied geometries, two of which can be induced to interconvert r...

Nanoparticle-induced negative differential resistance and memory effect in polymer bistable light-emitting device

On the functional relevance of frontal cortex for passive and voluntarily controlled bistable vision.

In bistable vision, one constant ambiguous stimulus leads to 2 alternating conscious percepts. This perceptual switching occurs spontaneously but can also be influenced through voluntary control. Neuroimaging studies have reported that frontal regions are activated during spontaneous perceptual switches, leading some researchers to suggest that frontal regions causally induce perceptual switche...

Memory Switches in Chemical Reaction Space

Just as complex electronic circuits are built from simple Boolean gates, diverse biological functions, including signal transduction, differentiation, and stress response, frequently use biochemical switches as a functional module. A relatively small number of such switches have been described in the literature, and these exhibit considerable diversity in chemical topology. We asked if biochemi...

New organic bistable ®lms for ultrafast electric memories

Thin ®lms which have electrical bistable effects are mostly metal-organic complexes and/or organic-organic (all-organic) complexes. Very recently some simple (mono-molecular) organic materials have been discovered which have bistable states at room temperature, too. The threshold voltage across these organic ®lms with a thickness of 60 nm is 4±6 V and the transition time is 5±10 ns. Therefore, ...