KAUST Grant NumberOSR-2016-CRG5-2996
Permanent link to this recordhttp://hdl.handle.net/10754/669077
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AbstractBiological ion channels rapidly and selectively gate ion transport through atomic-scale filters to maintain vital life functions. We report an atomic-scale ion transistor exhibiting ultrafast and highly selective ion transport controlled by electrical gating in graphene channels around 3 angstroms in height, made from a single flake of reduced graphene oxide. The ion diffusion coefficient reaches two orders of magnitude higher than the coefficient in bulk water. Atomic-scale ion transport shows a threshold behavior due to the critical energy barrier for hydrated ion insertion. Our in situ optical measurements suggest that ultrafast ion transport likely originates from highly dense packing of ions and their concerted movement inside the graphene channels.
CitationXue, Y., Xia, Y., Yang, S., Alsaid, Y., Fong, K. Y., Wang, Y., & Zhang, X. (2021). Atomic-scale ion transistor with ultrahigh diffusivity. Science, 372(6541), 501–503. doi:10.1126/science.abb5144
SponsorsSupported by King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research award OSR-2016-CRG5-2996.