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Electrochemically Tuned Properties for Electrolyte‐Free Carbon Nanotube Sheets
Author(s) -
Zakhidov Alexander A.,
Suh DongSeok,
Kuznetsov Alexander A.,
Barisci Joseph N.,
Muñoz Edgar,
Dalton Alan B.,
Collins Steve,
Ebron Von H.,
Zhang Mei,
Ferraris John P.,
Zakhidov Anvar A.,
Baughman Ray H.
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200900253
Subject(s) - materials science , electrolyte , supercapacitor , dopant , carbon nanotube , intercalation (chemistry) , electrochemistry , conductivity , nanotechnology , charge (physics) , chemical engineering , chemical physics , electrode , optoelectronics , doping , inorganic chemistry , chemistry , physics , quantum mechanics , engineering
Injecting high electronic charge densities can profoundly change the optical, electrical, and magnetic properties of materials. Such charge injection in bulk materials has traditionally involved either dopant intercalation or the maintained use of a contacting electrolyte. Tunable electrochemical charge injection and charge retention, in which neither volumetric intercalation of ions nor maintained electrolyte contact is needed, are demonstrated for carbon nanotube sheets in the absence of an applied field. The tunability of electrical conductivity and electron field emission in the subsequent material is presented. Application of this material to supercapacitors may extend their charge‐storage times because they can retain charge after the removal of the electrolyte.