Capacitive and Efficient Near-Infrared Stimulation of Neurons via an Ultrathin AgBiS₂ Nanocrystal Layer.

ABSTRACT: Colloidal nanocrystals (NCs) exhibit significant potential for photovoltaic bioelectronic interfaces because of their solution processability, tunable energy levels, and inorganic nature, lending them chemical stability. Silver bismuth sulfide (AgBiS₂) NCs, free from toxic heavy-metal elements (e.g., Cd, Hg, and Pb), particularly offer an exceptional absorption coefficient exceeding 10⁵ cm^-1 in the near-infrared (NIR), surpassing many of their inorganic counterparts. Here, we integrated an ultrathin (24 nm) AgBiS₂ NC layer into a water-stable photovoltaic bioelectronic device architecture that showed a high capacitive photocurrent of 2.3 mA·cm^-2 in artificial cerebrospinal fluid (aCSF) and ionic charges over 10 μC·cm^-2 at a

SUBMITTER: Balamur R 

PROVIDER: S-EPMC11661670 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature