{"id":1380,"date":"2013-07-25T18:27:56","date_gmt":"2013-07-25T18:27:56","guid":{"rendered":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/?p=1380"},"modified":"2013-07-25T18:29:59","modified_gmt":"2013-07-25T18:29:59","slug":"understanding-and-controlling-the-substrate-effect-on-graphene-electron-transfer-chemistry-via-reactivity-imprint-lithography","status":"publish","type":"post","link":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/understanding-and-controlling-the-substrate-effect-on-graphene-electron-transfer-chemistry-via-reactivity-imprint-lithography\/","title":{"rendered":"Understanding and Controlling the Substrate Effect on Graphene Electron-transfer Chemistry via Reactivity Imprint Lithography"},"content":{"rendered":"
\"Figure<\/a>

Figure 1: (a) Schematic of graphene supported on a chemically patterned substrate. (b) Schematic of reaction pattern in graphene induced by substrate. (c) Raman map of reaction intensity.<\/p><\/div>\n

Graphene has exceptional electronic, optical, mechanical, and thermal properties, which provide it with great potential for use in electronic, optoelectronic and sensing applications[1<\/a>]<\/sup>. The chemical functionalization of graphene has been investigated with a view to controlling its electronic properties and interactions with other materials[2<\/a>]<\/sup>. Covalent modification of graphene by organic diazonium salts has been used to achieve these goals, but because graphene comprises only a single atomic layer, it is strongly influenced by the underlying substrate. In our work here[3<\/a>]<\/sup>, we show a stark difference in the rate of electron-transfer reactions with organic diazonium salts for monolayer graphene supported on a variety of substrates. Reactions proceed rapidly for graphene supported on SiO2<\/sub> and Al2<\/sub>O3<\/sub> (sapphire), but negligibly on alkyl-terminated and hexagonal boron nitride (hBN) surfaces, as shown by Raman spectroscopy. We also develop a model of reactivity based on substrate-induced electron\u2013hole puddles in graphene and achieve spatial patterning of chemical reactions in graphene by patterning the substrate.<\/p>\n

  1. A. K. Geim1 and K. S. Novoselov, \u201cThe rise of graphene,\u201d Nature Materials<\/i>, vol. 6, pp. 183-191, Mar. 2007. [↩<\/a>]<\/li>
  2. G. L. C. Paulus, Q. H. Wang, and M. S. Strano, \u201cCovalent Electron Transfer Chemistry of Graphene with Diazonium Salts,\u201d Accounts of Chemical Research<\/i>, vol. 46, pp. 160-170, Sep. 2012. [↩<\/a>]<\/li>
  3. Q. H. Wang, Z. Jin,\u00a0 K. K. Kim, A. J. Hilmer, G. L. C. Paulus, C.-J. Shih, M.-H. Ham, J. D. Sanchez-Yamagishi, K. Watanabe, T. Taniguchi, J. Kong, P. Jarillo-Herrero, and M. S. Strano, \u201cUnderstanding and controlling the substrate effect on graphene electron-transfer chemistry via reactivity imprint lithography,\u201d Nature Chemistry<\/i>, vol. 4, pp. 724-732, Aug. 2012. [↩<\/a>]<\/li><\/ol>","protected":false},"excerpt":{"rendered":"

    Graphene has exceptional electronic, optical, mechanical, and thermal properties, which provide it with great potential for use in electronic, optoelectronic…<\/p>\n","protected":false},"author":370,"featured_media":1381,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8,6083],"tags":[12713,12712],"_links":{"self":[{"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/posts\/1380"}],"collection":[{"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/users\/370"}],"replies":[{"embeddable":true,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/comments?post=1380"}],"version-history":[{"count":3,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/posts\/1380\/revisions"}],"predecessor-version":[{"id":2241,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/posts\/1380\/revisions\/2241"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/media\/1381"}],"wp:attachment":[{"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/media?parent=1380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/categories?post=1380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mtlsites.mit.edu\/annual_reports\/2013\/wp-json\/wp\/v2\/tags?post=1380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}