TY - JOUR
T1 - Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies
AU - Fonsaca, Jéssica E.S.
AU - Elías, Ana Laura
AU - Domingues, Sergio H.
AU - Oliveira, Marcela M.
AU - Endo, Morinobu
AU - Orth, Elisa S.
AU - Terrones, Mauricio
AU - Zarbin, Aldo J.G.
N1 - Funding Information:
Authors acknowledge the financial support from CNPq, CAPES, NENNAM (PRONEX Fundação Araucária/CNPq), National Institute of Science and Technology of Carbon Nanomaterials (INCT-Nanocarbono) and Science without Borders Program CAPES/CNPq. We also acknowledge CME-UFPR for the TEM images. The authors also acknowledge J. Wang, S. Tarrago, J.E. Simak, Y. Lei, L. Pulickal Rajukumar and C. Rotella for technical assistance and useful discussions. MT acknowledges the financial support from the AFOSR MURI project award No. FA9550-12-1-0035 and award No. W911NF-11-1-0362 . M.T. also thanks Penn State Center for Nanoscale Science for the seed Grant on 2D Layered Materials (DMR-0820404), and Center for two-Dimensional and Layered Materials at The Pennsylvania State University.
Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/8/8
Y1 - 2015/8/8
N2 - Here we report the synthesis of cube-like Ag-nanoparticle (Ag-NP) agglomerates using functionalized graphene nanoribbons (GNR) as templates. The morphology and size of the resulting Ag assemblies are carefully controlled by changing the surface activity of the GNR through chemical functionalization. We propose a mechanism explaining the cube-like organization of the Ag-NP. In particular, the functionalized ribbons first organize in a cubic/rectangular shape, and subsequently thiol moieties preferentially anchor on the edges of the ribbons favoring their surface passivation with Ag-NPs. Furthermore, we found these Ag agglomerates serve as efficient substrate for the Raman detection of 4-aminothiophenol (4-ATP) molecules, through a surface enhancement Raman phenomenon. We believe these novel Ag-NP nanocomposites could also find applications as bactericides, catalysts and electrically conducting fillers.
AB - Here we report the synthesis of cube-like Ag-nanoparticle (Ag-NP) agglomerates using functionalized graphene nanoribbons (GNR) as templates. The morphology and size of the resulting Ag assemblies are carefully controlled by changing the surface activity of the GNR through chemical functionalization. We propose a mechanism explaining the cube-like organization of the Ag-NP. In particular, the functionalized ribbons first organize in a cubic/rectangular shape, and subsequently thiol moieties preferentially anchor on the edges of the ribbons favoring their surface passivation with Ag-NPs. Furthermore, we found these Ag agglomerates serve as efficient substrate for the Raman detection of 4-aminothiophenol (4-ATP) molecules, through a surface enhancement Raman phenomenon. We believe these novel Ag-NP nanocomposites could also find applications as bactericides, catalysts and electrically conducting fillers.
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U2 - 10.1016/j.carbon.2015.05.098
DO - 10.1016/j.carbon.2015.05.098
M3 - Article
AN - SCOPUS:84938602110
VL - 93
SP - 800
EP - 811
JO - Carbon
JF - Carbon
SN - 0008-6223
ER -