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A new paradigm is established for the design of conjugated anodically coloring electrochromic molecules. It is shown that through crossconjugation the electronic energy levels of the radical cation state may be controllably tuned independent of the neutral state. It is shown how cross-conjugation can be used to tune the radical cation state independent of the neutral state. Manipulating the oscillator strengths of radical cation transitions allows for tuning of the color by shifting the λmax of the low-energy absorption by over 400 nm. The neutral states of these molecules are UV absorbing, providing solutions that are colorless with L*a*b* values of 100, 0, 0. They are oxidized to vibrantly colored radical cations with absorptions that span the visible spectrum, creating green, yellow, and red chromophores. These molecules are then mixed to create transmissive, colorless blends that switch to opaque black solutions.

Discovery advances the field of color-changing materials

A graduate student at the Georgia Tech has made an accidental discover that allows materials to rapidly change color from completely clear to a...
World’s fastest creature may also be one of the smallest

World’s fastest creature may also be one of the smallest

Which is the fastest animal in the Earth? Most people will answer Cheetah, falcon or even a sailfish. But Saad Bhamla at Georgia Institute of Technology...
The intraoral electronics with a sodium sensor is based on a breathable elastomeric membrane that resembles a dental retainer. The ultrathin device is flexible and stretchable, and can wirelessly transmit data up to 10 meters. (Credit: Rob Felt, Georgia Tech).

Flexible, wearable oral sodium sensor to enhance hypertension control

Hypertension can lead to increased blood pressure and heart complications. The main cause of include intaking too much salt. In order to monitor salt intake, specialists...
Image shows the time window for attacks on the Real-Time Captcha system

Real-time CAPTCHA technology improves biometric authentication

Captcha technology– initially an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart" – is broadly used to keep bots...
Nicolas Hud, director of the NSF-NASA Center for Chemical Evolution at the Georgia Institute of Technology. Hud was a panelist at a press briefing “Asteroids for Research, Discovery, and Commerce” at the 2018 annual meeting of the American Association for the Advancement of Science (AAAS)

Asteroid ‘Time Capsule’ can explain how life started on Earth

Asteroids mimic a major role in apocalyptic threat, where they also get blamed for destroying the species of dinosaurs. But, according to the researcher Nicholas Hud, Georgia Institute...
New, self-assembled Hairy nanoparticles could give double punch to cancer

New, self-assembled Hairy nanoparticles could give double punch to cancer

A new approach to concurrently introduce both therapeutic drugs and cancer-fighting heat into tumors have been discovered. This oncoming research on hairy nanoparticles made...
Daydreaming is Good. It Means You’re Smart

Daydreaming is Good. It Means You’re Smart

According to a new study by the Georgia Institute of Technology, daydreaming while working or doing something else is the sign of your smartness and...