Title of article :
The effect of adsorbed species and exposure to sulfuric acid on the electrical conductance of individual single-wall carbon nanotube transistors
Author/Authors :
Jun Shen، نويسنده , , Pascal Puech، نويسنده , , Thierry Ondarçuhu، نويسنده , , Walter Escoffier، نويسنده , , Bertrand Raquet، نويسنده , , Marc Monthioux، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
4
From page :
3953
To page :
3956
Abstract :
The electrical conductance of individual single-wall carbon nanotube (SWCNT) transistors was investigated before, during, and after soaking in concentrated sulfuric acid in air environment. The resulting doping effect has induced a shift of the Fermi level which was monitored by the electrical behavior and sought in Raman spectroscopy signature. For either metallic or semiconducting SWCNTs, the maximum conductance value was lowered during the contact with the acid; remained low for a short time after removing the acid; and recovered after long air exposure. This demonstrated the significant contribution of the physisorbed species in the measurements, specifically at the metal pad/SWCNT contact lines. The study also demonstrated that washing with sulfuric acid is an easy method for removing adsorbed species and reaching the intrinsic conductance of SWCNT-based devices.
Journal title :
Carbon
Serial Year :
2012
Journal title :
Carbon
Record number :
1124256
Link To Document :
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