Journal
NANO LETTERS
Volume 9, Issue 1, Pages 437-441Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl803352p
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Funding
- NSF CAREER [DMR-0547194]
- NSF MRSEC [DMR 05-20471]
- Sloan Fellowship
- Powe Junior Faculty Enhancement award
- ONR YIP [N000140710787]
- Beckman YIP [0609259093]
- University of Maryland (College Park)
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Air-stable single-source molecular precursor is applied for controlled size and morphology synthesis of one-dimensional and quasi-one-dimensional CdSe nanostructures. Two different growth approaches are compared to control the growth of nanostructures. When combined with well-defined Au colloidal catalysts, the use of single-source molecular precursor allows diameter control synthesis of monodispersed CdSe nanowires from 10-30 nm via a vapor-liquid-solid mechanism. In addition, a variety of CdSe nanostructures with different morphologies can be achieved and tuned without assistance of metallic catalysts by carefully manipulating dynamic thermal decomposition process of single-source molecular precursor. The new level of synthetic control afforded by our present work opens up new opportunities for using as-synthesized CdSe nanostructures as model systems for fundamental studies as well as building blocks for larger scale functional device assembly. Importantly, we demonstrate that a single CdSe tripod can be natively configured as a nanoscale phototransistor in which photocurrent created between two tripod arms can be efficiently modulated by applying a gate voltage through the third arm.
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