Multi-wavelength Raman spectroscopy of natural nanostructured carbons

IF 2.7 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

American Mineralogist Pub Date : 2023-09-01 DOI:10.2138/am-2022-8912

Sergey Isaenko, Tatyana Shumilova, Vladimir Bocharov, Vasily Ulyashev

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Abstract

9 There is an extensive range of carbon substances with poorly ordered structures that are not 10 well understood. Yet they are important as indicators of conditions of related geological 11 processes. The carbon minerals include nanocrystalline graphite, natural analogues of glass-like 12 carbon (GLC) – shungite and impact ultrahigh-pressure GLC, recently discovered 13 ultranocrystalline diamond, as well as natural carbon nanocomposites of diamond, lonsdaleite 14 and graphite. Studying these natural carbon substances using a standard Raman approach with 15 excitation by visible radiation may lead to a significant distortion of the understanding of their 16 phase states. This paper presents in detail for the first time the spectral features of natural, poorly 17 ordered and multiphase sp 2 -sp 3 carbon composites by multi–wave Raman spectroscopy using 18 laser excitations from visible to ultraviolet light applied to natural low-ordered carbon substances 19 - nanocrystalline graphite and shungite, nanocrystalline and ultranocrystalline diamond, and 20 multiphase carbon aggregates. The carbon state resolution advantages of ultraviolet Raman 21 spectroscopy for phase analysis of nanostructured and poorly ordered polycomponent carbon 22

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天然纳米结构碳的多波长拉曼光谱

9有很多碳物质的结构不太有序，但人们对此并不了解。然而，它们作为相关地质过程条件的指标是重要的。碳矿物包括纳米晶体石墨、类玻璃12碳（GLC）的天然类似物-顺土和冲击超高压GLC，最近发现的13超非晶金刚石，以及金刚石、朗斯代尔石14和石墨的天然碳纳米复合材料。使用可见光辐射激发的标准拉曼方法研究这些天然碳物质可能会导致对其16种相态的理解发生重大扭曲。本文首次详细介绍了天然、无序和多相的sp2-sp3碳复合材料的光谱特征，通过多波拉曼光谱，从可见光到紫外光的18个激光激发应用于天然低有序碳物质19-纳米晶石墨和顺土、纳米晶和超非晶金刚石，和20个多相碳聚集体。紫外拉曼光谱在纳米结构和无序多组分碳相分析中的碳态分辨率优势22

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来源期刊

American Mineralogist 地学-地球化学与地球物理

CiteScore

5.20

自引率

9.70%

发文量

276

审稿时长

1 months

期刊介绍： American Mineralogist: Journal of Earth and Planetary Materials (Am Min), is the flagship journal of the Mineralogical Society of America (MSA), continuously published since 1916. Am Min is home to some of the most important advances in the Earth Sciences. Our mission is a continuance of this heritage: to provide readers with reports on original scientific research, both fundamental and applied, with far reaching implications and far ranging appeal. Topics of interest cover all aspects of planetary evolution, and biological and atmospheric processes mediated by solid-state phenomena. These include, but are not limited to, mineralogy and crystallography, high- and low-temperature geochemistry, petrology, geofluids, bio-geochemistry, bio-mineralogy, synthetic materials of relevance to the Earth and planetary sciences, and breakthroughs in analytical methods of any of the aforementioned.