Dasgupta, Subho ; Wang, Di ; Kübel, Christian ; Hahn, Horst ; Baumann, Theodore F. ; Biener, Jürgen (2014)
Dynamic Control Over Electronic Transport in 3D Bulk Nanographene via Interfacial Charging.
In: Advanced Functional Materials, 24 (23)
doi: 10.1002/adfm.201303534
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Electrochemical surface charge-induced variation of physical properties in interface-dominated bulk materials is a rapidly emerging field in material science. The recently developed three-dimensional bulk nanographene (3D-BNG) macro-assemblies with ultra-high surface area and chemical inertness offer new opportunities in this area. Here, the electronic transport in centimeter-sized 3D-BNG monoliths can be dynamically controlled via electrochemically induced surface charge density. Specifically, a fully reversible variation in macroscopic conductance up to several hundred percent is observed with ≤1 V applied gate potential. The observed conductivity change can be explained in the light of the electrochemically-induced accumulation or depletion of charge carriers in combination with a large variation in the carrier mobility; the latter, being highly affected by the defect density modulations resulting from the interfacial charge injection, sharply decreases with an increase in defect concentrations. The phenomenon presented in this study is believed to open the door to novel applications of bulk graphene materials such as, for example, low voltage and high power tunable resistors.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Dasgupta, Subho ; Wang, Di ; Kübel, Christian ; Hahn, Horst ; Baumann, Theodore F. ; Biener, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Dynamic Control Over Electronic Transport in 3D Bulk Nanographene via Interfacial Charging |
| Sprache: | Englisch |
| Publikationsjahr: | 18 Juni 2014 |
| Verlag: | WILEY-VCH Verlag GmbH & Co. KGaA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Functional Materials |
| Jahrgang/Volume einer Zeitschrift: | 24 |
| (Heft-)Nummer: | 23 |
| DOI: | 10.1002/adfm.201303534 |
| Kurzbeschreibung (Abstract): | Electrochemical surface charge-induced variation of physical properties in interface-dominated bulk materials is a rapidly emerging field in material science. The recently developed three-dimensional bulk nanographene (3D-BNG) macro-assemblies with ultra-high surface area and chemical inertness offer new opportunities in this area. Here, the electronic transport in centimeter-sized 3D-BNG monoliths can be dynamically controlled via electrochemically induced surface charge density. Specifically, a fully reversible variation in macroscopic conductance up to several hundred percent is observed with ≤1 V applied gate potential. The observed conductivity change can be explained in the light of the electrochemically-induced accumulation or depletion of charge carriers in combination with a large variation in the carrier mobility; the latter, being highly affected by the defect density modulations resulting from the interfacial charge injection, sharply decreases with an increase in defect concentrations. The phenomenon presented in this study is believed to open the door to novel applications of bulk graphene materials such as, for example, low voltage and high power tunable resistors. |
| Freie Schlagworte: | charge transport, hierarchical structures, hybrid materials, transistors, porous materials |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 16 Feb 2015 13:44 |
| Letzte Änderung: | 16 Feb 2015 13:44 |
| PPN: | |
| Sponsoren: | The authors acknowledge the financial support by the Deutsche Forschungsgemeinschaft (DFG) under contract HA1344/25-1. , SD and HH also thank the financial support from Helmholtz Gemeinschaft in the form of Helmholtz Virtual Institute VI530. , Work at LLNL was performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344. , Project 12-ERD-035 was funded by the LDRD Program at LLNL. |
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