Atomic-scale ion transistor with ultrahigh diffusivity

Yahui Xue, Yang Xia, Sui Yang, Yousif Alsaid, King Yan Fong, Yuan Wang, Xiang Zhang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Biological 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.
Original languageEnglish (US)
Pages (from-to)501-503
Number of pages3
JournalScience
Volume372
Issue number6541
DOIs
StatePublished - Apr 29 2021
Externally publishedYes

ASJC Scopus subject areas

  • General

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