Atomic-scale ion transistor with ultrahigh diffusivity

doi:10.1126/science.abb5144

GSTDTAP > 气候变化

DOI	10.1126/science.abb5144
	Atomic-scale ion transistor with ultrahigh diffusivity
	Yahui Xue; Yang Xia; Sui Yang; Yousif Alsaid; King Yan Fong; Yuan Wang; Xiang Zhang
	2021-04-30
发表期刊	Science
出版年	2021
英文摘要	Cells are adept at fast, gated ion flow through tailored channels, which is key to many biological processes. Xue et al. developed ion transistors from reduced graphene oxide membranes and observed a field-enhanced diffusivity of the ions (see the Perspective by Hinds). By applying electrical gating, the average surface potential on the graphene layer could be controlled, thus altering the energy barrier for ion intercalation into the channel and leading to very high diffusion rates. The authors observed selective ion transport two orders of magnitude faster than the ion diffusion in bulk water. Science , this issue p. [501][1]; see also p. [459][2] 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. [1]: /lookup/doi/10.1126/science.abb5144 [2]: /lookup/doi/10.1126/science.abh2618
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/325037
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yahui Xue,Yang Xia,Sui Yang,et al. Atomic-scale ion transistor with ultrahigh diffusivity[J]. Science,2021.
APA	Yahui Xue.,Yang Xia.,Sui Yang.,Yousif Alsaid.,King Yan Fong.,...&Xiang Zhang.(2021).Atomic-scale ion transistor with ultrahigh diffusivity.Science.
MLA	Yahui Xue,et al."Atomic-scale ion transistor with ultrahigh diffusivity".Science (2021).