Journal
NANOTECHNOLOGY
Volume 22, Issue 22, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/22/22/225602
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Funding
- NSF [CMMI-0926245]
- AFOSR [FA9550-091-0482]
- ARO [W911NF-09-1-0505]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0905914] Funding Source: National Science Foundation
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An aqueous solution-based doping strategy was developed for controlled doping impurity atoms into a ZnO nanowire (NW) lattice. Through this approach, antimony-doped ZnO NWs were successfully synthesized in an aqueous solution containing zinc nitrate and hexamethylenetetramine with antimony acetate as the dopant source. By introducing glycolate ions into the solution, a soluble antimony precursor (antimony glycolate) was formed and a good NW morphology with a controlled antimony doping concentration was successfully achieved. A doping concentration study suggested an antimony glycolate absorption doping mechanism. By fabricating and characterizing NW-based field effect transistors (FETs), stable p-type conductivity was observed. A field effect mobility of 1.2 cm(2) V-1 s(-1) and a carrier concentration of 6 x 10(17) cm(-3) were achieved. Electrostatic force microscopy (EFM) characterization on doped and undoped ZnO NWs further illustrated the shift of the metal-semiconductor barrier due to Sb doping. This work provided an effective large-scale synthesis strategy for doping ZnO NWs in aqueous solution.
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