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High Yield Growth of Various CdS Nano-Structures and Their Electron Field Emission Behavior

Published online by Cambridge University Press:  01 February 2011

Juno Lawrance ,
Timothy Gutu ,
Devon McClain ,
Jianfeng Wu  and
Jun Jiao
Juno Lawrance
Affiliation:
[email protected], Portland State University, Electrical and computer Engineering Department, 1705 SW, 11th Ave,, Apt#822, Portland, OR-97201-USA, Portland, OR, 97201, United States
Timothy Gutu
Affiliation:
[email protected], Department of Physics, Portland, OR, 97201, United States
Devon McClain
Affiliation:
[email protected], Department of Physics, Portland, OR, 97201, United States
Jianfeng Wu
Affiliation:
[email protected], Department of Physics, Portland, OR, 97201, United States
Jun Jiao
Affiliation:
[email protected], Department of Physics, Portland, OR, 97201, United States
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Abstract

Nanostructures are considered the critical component in a wide range of potential nanoscale device applications. Yet a procedure to fabricate them with both controllable results and in bulk quantities must be developed in order to achieve their commercialization at reduced cost. In this report, we introduce an improved vapor-liquid-solid method that is capable of preparing high yield, high quality CdS nanowires and nanobelts in a turf-like configuration. To increase yield, we placed gold-coated substrates in a ceramic boat partially covered with a glass slide to form a gas trap. Only a small opening was provided to allow the CdS vapor to escape from the trap. This arrangement increases catalyst exposure to CdS vapor flow in comparison to conventional CVD methods. This allowed the CdS vapor to deposit densely over the substrate at a predetermined temperature range of 501°C-630°C inside the quartz tube. These conditions results in synthesis of various morphologies on both quartz and tungsten substrates including an intertwined-like structure not previously reported. Electron microscopy and microanalysis techniques were utilized in characterizing these morphologies, internal structures and elemental compositions. Electron field emission properties were investigated in an ultra high vacuum chamber set up with a base pressure of ∼1E-9 torr.

Keywords

chemical vapor deposition (CVD) (chemical reaction)nanostructurefield emission
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 963: Symposium Q – Nanowires and Carbon Nanotubes – Science and Applications , 2006 , 0963-Q10-16
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

1. Wang, Y., Meng, G., Zhang, L., Liang, C., Zhang, J., Chem.Mater. 14 (2002) 1773.Google Scholar
2. Duan, X. F., Lieber, C. M., Adv. Mater. 12 (2000) 298.Google Scholar
3. Routkevitch, D., Bigioni, T., Moskovits, M., Xu, J. M., J.Phys. Chem. 100 (1996) 14037 Google Scholar
4. Dong, Lifeng and Jiao, Jun, Microsc. Microanal. 11, 116–123, 2005.Google Scholar
5. Lin, Yi-Feng, Hsu, Yung-Jung, Lu, Shih-Yuan and Kung, Sheng-Chin, ChemComm DOI:10.1039/b604309gGoogle Scholar
6. Dong, Lifeng, Gushtyuk, Tatyana, and Jiao*, Jun, J. Phys. Chem. B 2004, 108, 1617–1620.Google Scholar
7. Zhan, Jinhua, Yang, Xiaogang, Wang, Dunwei, Li, Shengdong, Xie, Yi, Xia, Younan, and Qian*, Yitai, Adv. Mater. 2000, 12, No. 18, September 15.Google Scholar
8. LifengDong a, Jun Jiao a,*, Michael Coulter b, Logan Love, Chemical Physics Letters 376 (2003) 653–658.Google Scholar
9. Fowler, H., Nordheim, L. W., Proc. R. Soc. London, Ser. A 119 (1928) 173.Google Scholar