Preparation of Helical Monosubstituted Polyacetylene@CdSe Quantum Dots Composite and its Application for Low Infrared Emissivity

Abstract:

Helical monosubstituted polyacetylene@CdSe quantum dots (HPA@CdSe QDs) nanocomposites were fabricated by grafting helical HPA polymers onto the surface of semiconductor QDs through ester linkage. Optically active HPA derived from chiral serine was polymerized by a rhodium zwitterion catalyst, and evidently proved to adopt a predominately single-handed helical conformation. The HPA@QDs nanocomposites were characterized by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The results indicate that the HPA matrix exhibits an enhancement in thermal stability after hybridization with CdSe QDs, while the QDs can maintain their original crystalline structure during the grafting process. The infrared emissivity property of the HPA@QDs nanocomposites at 8-14 μm was further investigated. These data demonstrated that the HPA@QDs composite film with doped CdSe QDs possesses an infrared emissivity value of 0.393, which was much lower than pristine HPA and QDs. This might be attributed to the incorporation of optically active helical HPA and semiconductor QDs in a hybrid phase and their strengthened interfacial interaction.

• Periodical: Advanced Materials Research (Volumes 1044-1045)
• Pages: 88-91
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1044-1045.88
• Online since: October 2014
• Authors: Xiao Hai Bu, Yu Ming Zhou*, Man He, Tao Zhang, Hu Chuan Wang
• Keywords: Composite, Helical Polyacetylene, Infrared Emissivity, Quantum Dot

References

[1] S. H. Park, K. S. Lee, A. S. Reddy, Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering, J. Appl. Phys., 110 (2011) 63508-63515.

DOI: 10.1063/1.3636107

[2] W. Zhang, C. Lu, Y. Ni, J. Song, Z. Xu, Preparation and characterization of Sm2O3/Cu mosaic structure with infrared absorptive properties and low infrared emissivity, Mater. Lett., 87(2012)13-16.

DOI: 10.1016/j.matlet.2012.07.044

[3] X. Yan, G. Xu, Corrosion and mechanical properties of polyurethane/Al composite coatings with low infrared emissivity, J. Alloys Compd., 491 (2010) 649-653.

DOI: 10.1016/j.jallcom.2009.11.030

[4] L. Chen, C. Lu, Z. Fang, Y Lu, Y. Ni, Z. Xu, Infrared emissivity and microwave absorption property of Sm0. 5Sr0. 5CoO3 perovskites decorated with carbon nanotubes, Mater. Lett., 93 (2013) 308-311.

DOI: 10.1016/j.matlet.2012.11.117

[5] B. Lin, J. Tang, H. Liu, Y. Sun, C. Yuan, Structure and infrared emissivity of polyimide/mesoporous silica composite film, J. Solid State Chem., 178 (2005) 650-654.

DOI: 10.1016/j.jssc.2004.12.010

[6] J. Liu, J. W. Y. Lam, B. Z. Tan, Acetylenic polymers: syntheses, structures, and functions, Chem. Rev., 109 (2009) 5799-5867.

DOI: 10.1021/cr900149d

[7] H. Zhao, F. Sanda, T. Masuda, Transformation of helical sense of poly(N-propargylamides) controlled by competition between structurally different enantiomeric amino acids, Macromolecules, 37 (2004) 8888-8892.

DOI: 10.1021/ma048834f

[8] B. S. Li, S. Z. Kang, K. K. L. Cheuk, L. Wan, L. Ling, C. Bai, B. Z. Tang, Self-assembling of helical poly(phenylacetylene) carrying L-valine pendants in solution, on mica substrate, and on water surface, Langmuir, 20 (2004) 7598-7603.

DOI: 10.1021/la036118l

[9] Z. Wang, Y. Zhou, Y. Sun, Q. Yao, Optically active helical polyurethane-urea with single-handed conformation for infrared low emissivity, Macromolecules, 42 (2009) 4972-4976.

DOI: 10.1021/ma900763r

[10] X. Bu, Y. Zhou, M. He, Z. Chen, T. Zhang, Optically active SiO2/TiO2/polyacetylene multilayered nanospheres: preparation, characterization, and application for low infrared emissivity, Appl. Surf. Sci., 288 (2014) 444-451.

DOI: 10.1016/j.apsusc.2013.10.053