{"id":10037,"date":"2018-12-04T17:28:00","date_gmt":"2018-12-04T17:28:00","guid":{"rendered":"https:\/\/www.thermofisher.com\/blog\/materials\/?p=10037"},"modified":"2026-09-16T10:25:46","modified_gmt":"2026-09-16T15:25:46","slug":"hot-topic-like-1000-c-analyzing-single-layer-graphene-from-cvd","status":"publish","type":"post","link":"https:\/\/www.thermofisher.com\/blog\/materials\/hot-topic-like-1000-c-analyzing-single-layer-graphene-from-cvd\/","title":{"rendered":"Hot Topic (Like 1000 \u00b0C) \u2013 Analyzing Single-Layer Graphene from CVD"},"content":{"rendered":"

Pyrolysis<\/span><\/span>,<\/span><\/span>\u00a0<\/span><\/span>the first stage in manufacturing single-layer graphene,\u00a0<\/span><\/span>is<\/span><\/span>\u00a0the chemical decomposition of carbon-based materials through the application of heat.<\/span><\/span>\u00a0<\/span><\/span>The problem with pyrolytic decomposition of<\/span><\/span>\u00a0graphene<\/span><\/span>\u00a0precursors<\/span><\/span>\u00a0is that it<\/span><\/span>\u00a0requires<\/span><\/span>\u00a0<\/span><\/span>extremely high temperatures<\/span><\/span>\u00a0(<\/span><\/span>over<\/span><\/span>\u00a01000 \u00b0C). Here<\/span><\/span>\u00a0metal catalyst<\/span><\/span>\u00a0substrates<\/span><\/span>\u00a0<\/span><\/span>are<\/span><\/span>\u00a0used to reduce the reaction temperature.<\/span><\/span>\u00a0<\/span><\/span>During<\/span><\/span>\u00a0the chemical vapor deposition<\/span><\/span>\u00a0(<\/span><\/span>CVD<\/span><\/span>)<\/span><\/span>\u00a0process<\/span><\/span>, carbon precursors adsorb on the catalyst surface and are subsequently decomposed to form different carbon species<\/span><\/span>. These species<\/span><\/span>\u00a0serve as the fundamental building blocks during the graphene growth.<\/span><\/span>
\n<\/span><\/p>\n

<\/span><\/span><\/p>\n

Continuing the process, these\u00a0<\/span><\/span>carbon species diffuse on the catalyst surface until they eventually react with each other to form small carbon clusters. Once the carbon clusters exceed a critical size, graphene crystals nucleate. As the deposition progresses, carbon species continue to add to the edges of the graphene islands, eventually resulting in a continuous, single layer of graphene. Once a complete monolayer has formed, additional layers typically do not grow due to the low reactivity of the graphene surface compared with that of the catalyst.<\/span><\/span>\u00a0But<\/span><\/span>\u00a0how does one judge the quality of graphene sheets when produced over large areas at an industrial scale<\/span><\/span>?<\/span><\/span>\u00a0Enter Raman imaging<\/span><\/span>\u00a0microscopy<\/span><\/span>.<\/span><\/span>\u00a0<\/span><\/p>\n

The s<\/span><\/span>pectrum of graphene acquired with Raman spectroscopy\u00a0<\/span><\/span>determines<\/span><\/span>\u00a0the number of graphene layers and provides information<\/span><\/span>\u00a0on<\/span><\/span>\u00a0the density of defects incorporated into the graphene lattice during growth. Raman imaging microscopy provides important spatial mapping that reveals the graphene coverage, nucleation density, and island morphology. This information can be used to understand the critical synthesis parameters and mechanisms that govern the growth and nucleation of graphene<\/span><\/span>. Given this feedback, the growth conditions can be\u00a0<\/span><\/span>optimize<\/span><\/span>d<\/span><\/span>\u00a0to minimize the defect density in these graphene films.<\/span><\/span>\u00a0<\/span><\/p>\n

In our application note 52551 we highlight the effectiveness of rapid Raman imaging applied to the field of graphene CVD growth dynamics. Raman imaging provides key information in developing CVD methods for single-layer graphene films with lower defect density, and thus, superior properties.<\/span><\/span>\u00a0<\/span><\/p>\n

Read Uncovering the Secrets Governing the Chemical Vapor Deposition of Graphene with Rapid Raman Imaging<\/a><\/span><\/span>
\n<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Pyrolysis,\u00a0the first stage in manufacturing single-layer graphene,\u00a0is\u00a0the chemical decomposition of carbon-based materials through the application of heat.\u00a0The problem with pyrolytic decomposition of\u00a0graphene\u00a0precursors\u00a0is that it\u00a0requires\u00a0extremely high temperatures\u00a0(over\u00a01000 \u00b0C). Here\u00a0metal catalyst\u00a0substrates\u00a0are\u00a0used to reduce the reaction temperature.\u00a0During\u00a0the chemical vapor deposition\u00a0(CVD)\u00a0process, carbon precursors adsorb on the catalyst surface and are subsequently decomposed to form different carbon species. These species\u00a0serve<\/p>\n","protected":false},"author":45,"featured_media":10039,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[959,977,968],"tags":[942],"division":[],"class_list":{"0":"post-10037","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-fundamental-materials-research","8":"category-raman-spectroscopy","9":"category-spectroscopy-spectrometry","10":"tag-energy-materials","11":"entry"},"_selected_authors":[1319],"_selected_reviewers":[],"acf":[],"yoast_head":"\nHot Topic (Like 1000 \u00b0C) \u2013 Analyzing Single-Layer Graphene from CVD - Advancing Materials<\/title>\n<meta name=\"description\" content=\"Explore how single-layer graphene produced by CVD is analyzed to understand its structure, quality, and properties for advanced materials research and applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermofisher.com\/blog\/materials\/hot-topic-like-1000-c-analyzing-single-layer-graphene-from-cvd\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Topic (Like 1000 \u00b0C) \u2013 Analyzing Single-Layer Graphene from CVD\" \/>\n<meta property=\"og:description\" content=\"Explore how single-layer graphene produced by CVD is analyzed to understand its structure, quality, and properties for advanced materials research and applications.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermofisher.com\/blog\/materials\/hot-topic-like-1000-c-analyzing-single-layer-graphene-from-cvd\/\" \/>\n<meta property=\"og:site_name\" content=\"Advancing Materials\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/thermofisher\" \/>\n<meta property=\"article:published_time\" content=\"2018-12-04T17:28:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-16T15:25:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/admin.acceleratingscience.com\/materials\/wp-content\/uploads\/sites\/7\/2018\/12\/graphene-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"760\" \/>\n\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Carl D. 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