Electronic Nose

The electronic nose is defined as an array of chemical sensors connected to a pattern-recognition system that identifies and analyzes odors by producing characteristic signal patterns. It enables the comparison of different aromas, which can be plotted on a multidimensional response map for recognition and analysis.

https://www.sciencedirect.com/topics/medicine-and-dentistry/electronic-nose

Confinement of ions within graphene oxide membranes enables neuromorphic artificial gustation

The development of fluidic neuromorphic components and perceiving systems for emulating the function of biological nervous systems is imperative and challenging. This study introduces a graphene oxide ionic memristive device capable of performing both sensory and computing functions. Experimental and theoretical simulations indicate that the prolonged retention of ions within graphene oxide channels accounts for the memristive characteristics. Importantly, this device can be used to construct a reservoir-computing gustatory system, which can effectively perceive sweet, salty, bitter, and sour flavors. Our system-level implementation of artificial gustation—although it is a proof-of-concept demonstration—should represent a substantial advancement toward future intelligent perceptions and/or taste reconstruction.

https://www.pnas.org/doi/10.1073/pnas.2413060122