Ultrapure Graphite from Solid Refining

doi:10.1002/adma.202500461

2025-05-06

PRE

DOI：10.1002/adma.202500461

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摘要

En 中文

石墨引发了广泛的量子物理发现，并展示了众多前沿应用。然而，现有石墨通常含有大量杂质，且有效的提纯方法尚不完善。本文报道了一种固相提纯方法，用于获得超纯石墨。通过该设计，杂质被固态镍（Ni）的原子晶格过滤。该方法利用了适宜的吸附、扩散和沉淀能垒，使得只有碳（C）原子能够有效地通过Ni晶格迁移，从而形成高质量石墨。所获得超纯石墨表现出最低的元素杂质密度（<10 ppm，比现有最佳石墨低一个数量级）、最高的结构纯度（面内结构缺陷密度<0.2 ppb，且伯纳尔堆叠>99%）以及最高的掺杂纯度（载流子掺杂密度<2.0 x 10¹⁰ cm⁻²）。石墨的这种卓越纯度促进了所制备石墨烯器件中的全整数可见朗道能级和超低量子跃迁磁场。这种固相提纯技术有望启发各类层状晶体的提纯，进而推动新现象的发现和先进应用的发展。

Keyword:

graphene

solid refining

Ultrapure graphite

期刊

Advanced Materials

IF:

26.8

论文数:

3.4W

被引数:

46.0W

机构

Shenzhen Inst Adv Technol

学者数:

论文数: 7

被引数: 7

chinese acad sci

学者数:

1.8W

论文数: 1.1W

被引数: 4.6K

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