caa a22 4500 445303956 CHVBK 20180317142606.0 cr unu---uuuuu 170323e20100201xx s 000 0 eng 10.1007/s12274-010-1016-2 doi (NATIONALLICENCE)springer-10.1007/s12274-010-1016-2 Soluble graphene through edge-selective functionalization [Elektronische Daten] [Zhengzong Sun, Shin-ichiro Kohama, Zengxing Zhang, Jay Lomeda, James Tour] Thermally expanded graphite was functionalized with 4-bromophenyl addends using the in situ diazonium formation procedure, and after mild sonication treatment in N,N′-dimethylformamide, thin graphene layers were exfoliated from the bulk graphite. These chemically-assisted exfoliated graphene (CEG) sheets had higher solubility than pristine graphene without any stabilizer additive. More than 70% of these soluble flakes had less than 5 layers. Energy filtered transmission electron microscopy (EFTEM) elemental mapping provided evidence of the edge-selective diazonium functionalization with graphene. A majority of the Br signals came from the edges of the CEG indicating that the basal planes were not highly functionalized. The CEG was also characterized by X-ray photoelectron spectroscopy, atomic force microscopy, Raman spectroscopy, and transmission electron microscopy. Tsinghua University Press and Springer-Verlag Berlin Heidelberg, 2010 Edge-selective functionalization nationallicence graphene nationallicence energy filtered transmission electron microscopy (EFTEM) nationallicence chemically-assisted exfoliation nationallicence Sun Zhengzong Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut Kohama Shin-ichiro Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut Zhang Zengxing Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut Lomeda Jay Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut Tour James Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut Nano Research Tsinghua Press 3/2(2010-02-01), 117-125 1998-0124 3:2<117 2010 3 12274 https://doi.org/10.1007/s12274-010-1016-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12274-010-1016-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sun Zhengzong Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut NATIONALLICENCE 700 1- Kohama Shin-ichiro Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut NATIONALLICENCE 700 1- Zhang Zengxing Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut NATIONALLICENCE 700 1- Lomeda Jay Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut NATIONALLICENCE 700 1- Tour James Department of Chemistry and Mechanical Engineering and Materials Science and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, 77005, Houston, Texas, USA aut NATIONALLICENCE 773 0- Nano Research Tsinghua Press 3/2(2010-02-01), 117-125 1998-0124 3:2<117 2010 3 12274 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer