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Room-temperature nonequilibrium growth of controllable ZnO nanorod arrays.

Li Q, Cheng K, Weng W, Song C, Du P, Shen G, Han G - Nanoscale Res Lett (2011)

Bottom Line: In this study, controllable ZnO nanorod arrays were successfully synthesized on Si substrate at room temperature (approx. 25°C).It was found that the wettability and electrowetting behaviors of ZnO nanorod arrays could be tuned through variations of nanorods density and length.Moreover, its field emission property was also optimized by changing the nanorods density and dimension.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science & Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China. wengwj@zju.edu.cn.

ABSTRACT
In this study, controllable ZnO nanorod arrays were successfully synthesized on Si substrate at room temperature (approx. 25°C). The formation of controllable ZnO nanorod arrays has been investigated using growth media with different concentrations and molar ratios of Zn(NO3)2 to NaOH. Under such a nonequilibrium growth condition, the density and dimension of ZnO nanorod arrays were successfully adjusted through controlling the supersaturation degree, i.e., volume of growth medium. It was found that the wettability and electrowetting behaviors of ZnO nanorod arrays could be tuned through variations of nanorods density and length. Moreover, its field emission property was also optimized by changing the nanorods density and dimension.

No MeSH data available.


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TEM characterizations of sample C: (a) TEM image; (b) SAED pattern; (c) HRTEM image.
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Figure 5: TEM characterizations of sample C: (a) TEM image; (b) SAED pattern; (c) HRTEM image.

Mentions: Figure 5a shows the TEM images of sample C and it can be seen that the diameter difference of nanorod between tip and root is nearly 60 nm. In addition, the selected area electron diffraction (SAED) pattern (Figure 5b) reveals that ZnO nanorods grown at room temperature are monocrystalline. The corresponding region of high-resolution TEM (HRTEM) image (Figure 5c) exhibits the lattice spacing between the adjacent planes is 0.26 nm, which matches well with the (002) crystal planes of wurtzite ZnO. The HRTEM results further confirm that the c-axis orientation is the preferential growth direction of the single-crystalline ZnO nanorods which correspond to the XRD results.


Room-temperature nonequilibrium growth of controllable ZnO nanorod arrays.

Li Q, Cheng K, Weng W, Song C, Du P, Shen G, Han G - Nanoscale Res Lett (2011)

TEM characterizations of sample C: (a) TEM image; (b) SAED pattern; (c) HRTEM image.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211990&req=5

Figure 5: TEM characterizations of sample C: (a) TEM image; (b) SAED pattern; (c) HRTEM image.
Mentions: Figure 5a shows the TEM images of sample C and it can be seen that the diameter difference of nanorod between tip and root is nearly 60 nm. In addition, the selected area electron diffraction (SAED) pattern (Figure 5b) reveals that ZnO nanorods grown at room temperature are monocrystalline. The corresponding region of high-resolution TEM (HRTEM) image (Figure 5c) exhibits the lattice spacing between the adjacent planes is 0.26 nm, which matches well with the (002) crystal planes of wurtzite ZnO. The HRTEM results further confirm that the c-axis orientation is the preferential growth direction of the single-crystalline ZnO nanorods which correspond to the XRD results.

Bottom Line: In this study, controllable ZnO nanorod arrays were successfully synthesized on Si substrate at room temperature (approx. 25°C).It was found that the wettability and electrowetting behaviors of ZnO nanorod arrays could be tuned through variations of nanorods density and length.Moreover, its field emission property was also optimized by changing the nanorods density and dimension.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science & Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China. wengwj@zju.edu.cn.

ABSTRACT
In this study, controllable ZnO nanorod arrays were successfully synthesized on Si substrate at room temperature (approx. 25°C). The formation of controllable ZnO nanorod arrays has been investigated using growth media with different concentrations and molar ratios of Zn(NO3)2 to NaOH. Under such a nonequilibrium growth condition, the density and dimension of ZnO nanorod arrays were successfully adjusted through controlling the supersaturation degree, i.e., volume of growth medium. It was found that the wettability and electrowetting behaviors of ZnO nanorod arrays could be tuned through variations of nanorods density and length. Moreover, its field emission property was also optimized by changing the nanorods density and dimension.

No MeSH data available.


Related in: MedlinePlus