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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.


Related in: MedlinePlus

Photographs of water droplet shape on the surface of (a) sample A; (b) sample B; (c) sample C; and (d) ZnO seed-layer film.
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Figure 6: Photographs of water droplet shape on the surface of (a) sample A; (b) sample B; (c) sample C; and (d) ZnO seed-layer film.

Mentions: The superhydrophobic materials have rosen worldwide research interest because of their considerable promise for potential applications, such as self-cleaning surfaces and lab-on-chip devices [35]. It is still a challenge to change the wettability behavior on superhydrophobic surfaces. In this study, we present a comparison of the wettability and electrowetting performances among ZnO nanorod arrays with different densities and dimensions. The wettability measurements of ZnO nanorod arrays on Si substrate with different densities and dimensions (samples A-C) and ZnO seed-layer film show that the water contact angle (θ) is 74.0°, 103.4°, 131.2°, and 93.5°, respectively (Figure 6a,b,c,d).


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)

Photographs of water droplet shape on the surface of (a) sample A; (b) sample B; (c) sample C; and (d) ZnO seed-layer film.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: Photographs of water droplet shape on the surface of (a) sample A; (b) sample B; (c) sample C; and (d) ZnO seed-layer film.
Mentions: The superhydrophobic materials have rosen worldwide research interest because of their considerable promise for potential applications, such as self-cleaning surfaces and lab-on-chip devices [35]. It is still a challenge to change the wettability behavior on superhydrophobic surfaces. In this study, we present a comparison of the wettability and electrowetting performances among ZnO nanorod arrays with different densities and dimensions. The wettability measurements of ZnO nanorod arrays on Si substrate with different densities and dimensions (samples A-C) and ZnO seed-layer film show that the water contact angle (θ) is 74.0°, 103.4°, 131.2°, and 93.5°, respectively (Figure 6a,b,c,d).

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