Graphene diamond-like carbon films heterostructure
A limitation to the potential use of graphene as an electronic material is the lack of control over the 2D materials properties once it is deposited on a supporting substrate. Here, the use of Diamond-like Carbon (DLC) interlayers between the substrate and the graphene is shown to offer the prospect...
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Veröffentlicht in: | Applied physics letters 2015-03, Vol.106 (10) |
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description | A limitation to the potential use of graphene as an electronic material is the lack of control over the 2D materials properties once it is deposited on a supporting substrate. Here, the use of Diamond-like Carbon (DLC) interlayers between the substrate and the graphene is shown to offer the prospect of overcoming this problem. The DLC films used here, more properly known as a-C:H with ∼25% hydrogen content, have been terminated with N or F moieties prior to graphene deposition. It is found that nitrogen terminations lead to an optical band gap shrinkage in the DLC, whilst fluorine groups reduce the DLC's surface energy. CVD monolayer graphene subsequently transferred to DLC, N terminated DLC, and F terminated DLC has then been studied with AFM, Raman and XPS analysis, and correlated with Hall effect measurements that give an insight into the heterostructures electrical properties. The results show that different terminations strongly affect the electronic properties of the graphene heterostructures. G-F-DLC samples were p-type and displayed considerably higher mobility than the other heterostructures, whilst G-N-DLC samples supported higher carrier densities, being almost metallic in character. Since it would be possible to locally pattern the distribution of these differing surface terminations, this work offers the prospect for 2D lateral control of the electronic properties of graphene layers for device applications. |
doi_str_mv | 10.1063/1.4914495 |
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Here, the use of Diamond-like Carbon (DLC) interlayers between the substrate and the graphene is shown to offer the prospect of overcoming this problem. The DLC films used here, more properly known as a-C:H with ∼25% hydrogen content, have been terminated with N or F moieties prior to graphene deposition. It is found that nitrogen terminations lead to an optical band gap shrinkage in the DLC, whilst fluorine groups reduce the DLC's surface energy. CVD monolayer graphene subsequently transferred to DLC, N terminated DLC, and F terminated DLC has then been studied with AFM, Raman and XPS analysis, and correlated with Hall effect measurements that give an insight into the heterostructures electrical properties. The results show that different terminations strongly affect the electronic properties of the graphene heterostructures. G-F-DLC samples were p-type and displayed considerably higher mobility than the other heterostructures, whilst G-N-DLC samples supported higher carrier densities, being almost metallic in character. Since it would be possible to locally pattern the distribution of these differing surface terminations, this work offers the prospect for 2D lateral control of the electronic properties of graphene layers for device applications.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4914495</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; ATOMIC FORCE MICROSCOPY ; CARRIER DENSITY ; CARRIER MOBILITY ; CHEMICAL VAPOR DEPOSITION ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; Correlation analysis ; Diamond-like carbon films ; DIAMONDS ; ELECTRICAL PROPERTIES ; Electronic materials ; FLUORINE ; GRAPHENE ; HALL EFFECT ; Heterostructures ; Interlayers ; Lateral control ; LAYERS ; Material properties ; NITROGEN ; POTENTIALS ; Shrinkage ; SUBSTRATES ; SURFACE ENERGY ; SURFACES ; X ray photoelectron spectroscopy</subject><ispartof>Applied physics letters, 2015-03, Vol.106 (10)</ispartof><rights>2015 Author(s).</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c351t-b1f331daf45d1cf1b14ff1f3bb4689c2ff84fef978717e18f3a31c1d6cd592573</citedby><cites>FETCH-LOGICAL-c351t-b1f331daf45d1cf1b14ff1f3bb4689c2ff84fef978717e18f3a31c1d6cd592573</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27923,27924</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22395711$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhao, Fang</creatorcontrib><creatorcontrib>Afandi, Abdulkareem</creatorcontrib><creatorcontrib>Jackman, Richard B.</creatorcontrib><title>Graphene diamond-like carbon films heterostructure</title><title>Applied physics letters</title><description>A limitation to the potential use of graphene as an electronic material is the lack of control over the 2D materials properties once it is deposited on a supporting substrate. Here, the use of Diamond-like Carbon (DLC) interlayers between the substrate and the graphene is shown to offer the prospect of overcoming this problem. The DLC films used here, more properly known as a-C:H with ∼25% hydrogen content, have been terminated with N or F moieties prior to graphene deposition. It is found that nitrogen terminations lead to an optical band gap shrinkage in the DLC, whilst fluorine groups reduce the DLC's surface energy. CVD monolayer graphene subsequently transferred to DLC, N terminated DLC, and F terminated DLC has then been studied with AFM, Raman and XPS analysis, and correlated with Hall effect measurements that give an insight into the heterostructures electrical properties. The results show that different terminations strongly affect the electronic properties of the graphene heterostructures. G-F-DLC samples were p-type and displayed considerably higher mobility than the other heterostructures, whilst G-N-DLC samples supported higher carrier densities, being almost metallic in character. Since it would be possible to locally pattern the distribution of these differing surface terminations, this work offers the prospect for 2D lateral control of the electronic properties of graphene layers for device applications.</description><subject>Applied physics</subject><subject>ATOMIC FORCE MICROSCOPY</subject><subject>CARRIER DENSITY</subject><subject>CARRIER MOBILITY</subject><subject>CHEMICAL VAPOR DEPOSITION</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>Correlation analysis</subject><subject>Diamond-like carbon films</subject><subject>DIAMONDS</subject><subject>ELECTRICAL PROPERTIES</subject><subject>Electronic materials</subject><subject>FLUORINE</subject><subject>GRAPHENE</subject><subject>HALL EFFECT</subject><subject>Heterostructures</subject><subject>Interlayers</subject><subject>Lateral control</subject><subject>LAYERS</subject><subject>Material properties</subject><subject>NITROGEN</subject><subject>POTENTIALS</subject><subject>Shrinkage</subject><subject>SUBSTRATES</subject><subject>SURFACE ENERGY</subject><subject>SURFACES</subject><subject>X ray photoelectron spectroscopy</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkE9LAzEQxYMoWKsHv8GCJw9bM5lkkxylaBUKXvQcstmEbu3-Mcke_PZuacHT8IYfb-Y9Qu6BroBW-AQrroFzLS7IAqiUJQKoS7KglGJZaQHX5Cal_SwFQ1wQtol23PneF01ru6FvykP77QtnYz30RWgPXSp2Pvs4pBwnl6fob8lVsIfk785zSb5eXz7Xb-X2Y_O-ft6WDgXksoaACI0NXDTgAtTAQ5h3dc0rpR0LQfHgg5ZKgvSgAloEB03lGqGZkLgkDyff-XRrkmuzdzs39L132TCGWkiAf2qMw8_kUzb7YYr9_JhhwLhSCvWRejxRbg6Sog9mjG1n468Bao7FGTDn4vAPg-1eXw</recordid><startdate>20150309</startdate><enddate>20150309</enddate><creator>Zhao, Fang</creator><creator>Afandi, Abdulkareem</creator><creator>Jackman, Richard B.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20150309</creationdate><title>Graphene diamond-like carbon films heterostructure</title><author>Zhao, Fang ; Afandi, Abdulkareem ; Jackman, Richard B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c351t-b1f331daf45d1cf1b14ff1f3bb4689c2ff84fef978717e18f3a31c1d6cd592573</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Applied physics</topic><topic>ATOMIC FORCE MICROSCOPY</topic><topic>CARRIER DENSITY</topic><topic>CARRIER MOBILITY</topic><topic>CHEMICAL VAPOR DEPOSITION</topic><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>Correlation analysis</topic><topic>Diamond-like carbon films</topic><topic>DIAMONDS</topic><topic>ELECTRICAL PROPERTIES</topic><topic>Electronic materials</topic><topic>FLUORINE</topic><topic>GRAPHENE</topic><topic>HALL EFFECT</topic><topic>Heterostructures</topic><topic>Interlayers</topic><topic>Lateral control</topic><topic>LAYERS</topic><topic>Material properties</topic><topic>NITROGEN</topic><topic>POTENTIALS</topic><topic>Shrinkage</topic><topic>SUBSTRATES</topic><topic>SURFACE ENERGY</topic><topic>SURFACES</topic><topic>X ray photoelectron spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, Fang</creatorcontrib><creatorcontrib>Afandi, Abdulkareem</creatorcontrib><creatorcontrib>Jackman, Richard B.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhao, Fang</au><au>Afandi, Abdulkareem</au><au>Jackman, Richard B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Graphene diamond-like carbon films heterostructure</atitle><jtitle>Applied physics letters</jtitle><date>2015-03-09</date><risdate>2015</risdate><volume>106</volume><issue>10</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>A limitation to the potential use of graphene as an electronic material is the lack of control over the 2D materials properties once it is deposited on a supporting substrate. Here, the use of Diamond-like Carbon (DLC) interlayers between the substrate and the graphene is shown to offer the prospect of overcoming this problem. The DLC films used here, more properly known as a-C:H with ∼25% hydrogen content, have been terminated with N or F moieties prior to graphene deposition. It is found that nitrogen terminations lead to an optical band gap shrinkage in the DLC, whilst fluorine groups reduce the DLC's surface energy. CVD monolayer graphene subsequently transferred to DLC, N terminated DLC, and F terminated DLC has then been studied with AFM, Raman and XPS analysis, and correlated with Hall effect measurements that give an insight into the heterostructures electrical properties. The results show that different terminations strongly affect the electronic properties of the graphene heterostructures. G-F-DLC samples were p-type and displayed considerably higher mobility than the other heterostructures, whilst G-N-DLC samples supported higher carrier densities, being almost metallic in character. Since it would be possible to locally pattern the distribution of these differing surface terminations, this work offers the prospect for 2D lateral control of the electronic properties of graphene layers for device applications.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4914495</doi></addata></record> |
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subjects | Applied physics ATOMIC FORCE MICROSCOPY CARRIER DENSITY CARRIER MOBILITY CHEMICAL VAPOR DEPOSITION CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Correlation analysis Diamond-like carbon films DIAMONDS ELECTRICAL PROPERTIES Electronic materials FLUORINE GRAPHENE HALL EFFECT Heterostructures Interlayers Lateral control LAYERS Material properties NITROGEN POTENTIALS Shrinkage SUBSTRATES SURFACE ENERGY SURFACES X ray photoelectron spectroscopy |
title | Graphene diamond-like carbon films heterostructure |
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