Selective electroless coating of palladium nanoparticles on metallic single-walled carbon nanotube

Yiyu Feng; Peng Lv; Xuequan Zhang; Yu Li; Wei Feng
August 2010
Applied Physics Letters;8/23/2010, Vol. 97 Issue 8, p083101
Academic Journal
The selective electroless coating of palladium (Pd) nanoparticles on metallic single-walled carbon nanotube (SWNT) was studied. The remarkable increase in conductivity of SWNT/Pd films up to fourfold higher than pure SWNT was due to p-type doping and Ohmic contact. Metallic behavior of SWNT/Pd-Field effect transistor (on/off ratio=1.2) was attributed to more hole carriers and no electrostatic barrier between nanotube and Pd. G-band and radial breathing mode in Raman indicates a definitive increase in the proportion of metallic SWNT. Results indicate Pd are selectively coated on metallic SWNT with more negative potential allowing for the electroless Pd2+ reduction.


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