Research Papers

Hydrophilicity and polarity of cubic silicon carbide nanocrystals identified from photoluminescence emissions in various solvents

[+] Author Affiliations
Jun Zhu

Yangzhou University, College of Physics Science and Technology and Institute of Optoelectronic Technology, 180 Siwangting Road, Yangzhou 225002, China

Yangzhou University, College of Guangling, 131 Jiangyangzhong Road, Yangzhou 225002, China

Shan Hu, Weiwei Xia, Li Fan

Yangzhou University, College of Physics Science and Technology and Institute of Optoelectronic Technology, 180 Siwangting Road, Yangzhou 225002, China

Rui Xu

Yangzhou University, College of Guangling, 131 Jiangyangzhong Road, Yangzhou 225002, China

Xiaobing Chen

Yangzhou University, College of Physics Science and Technology and Institute of Optoelectronic Technology, 180 Siwangting Road, Yangzhou 225002, China

Yangzhou University, College of Guangling, 131 Jiangyangzhong Road, Yangzhou 225002, China

J. Nanophoton. 8(1), 083070 (Dec 17, 2014). doi:10.1117/1.JNP.8.083070
History: Received September 4, 2014; Accepted November 17, 2014
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Abstract.  Since the surface-structure-related state dominates the photoluminescence (PL) emissions of cubic silicon carbide (3C-SiC) nanocrystals (NCs) with a diameter lower than 3.0 nm, the PL lines of 3C-SiC NCs in deionized water with different pH values, methanol, ethanol, chloroform, and toluene are characterized at the excitation of 300 to 360 nm. The position and intensity of the PL peaks provide experimental evidence that the surface of 3C-SiC is hydrophilic and hydroxyl bonding on the surface decreases the energy gap of the NCs. The PL emission wavelength of 3C-SiC NCs can be adjusted by adjusting the pH value of the solvent. The polar 3C-SiC NCs prefer to precipitate in chloroform and toluene.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Jun Zhu ; Shan Hu ; Rui Xu ; Weiwei Xia ; Li Fan, et al.
"Hydrophilicity and polarity of cubic silicon carbide nanocrystals identified from photoluminescence emissions in various solvents", J. Nanophoton. 8(1), 083070 (Dec 17, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.083070


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