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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 9, Iss. 3 — Mar. 10, 2011
  • pp: 032401–

Optical property of nanocomposite of mesoporous silica thin films incorporated with gold nanoparticles

Jingyue Fang, Xueao Zhang, Shiqiao Qin, and Shengli Chang  »View Author Affiliations


Chinese Optics Letters, Vol. 9, Issue 3, pp. 032401- (2011)


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Abstract

Amino-functionalized mesoporous silica thin films (MTFs) are produced using surface active agent F127, and then gold nanoparticles are introduced into the pore channels to prepare the Au/SiO2 nanocomposite. After assembling the gold, the amino-functionalized MTF undergoes some shrinkage but remains a periodic structure as demonstrated by X-ray diffraction (XRD) patterns. The nanocomposite shows an acute characteristic diffraction peak assigned to (111) plane of the face-centered-cubic structure of gold, indicating that gold nanoparticles crystallize well and grow in a preferred orientation in the pore channels. The surface plasma resonance (SPR) absorption peak near 570 nm undergoes a red-shift accompanied by a strengthening of intensity when HAuCl4 is used to react with the amino groups on the internal pore surfaces for 4, 6, and 8 h. The simulative results are consistent with the experimental ones shows that the absorption property of the Au/SiO2 nanocomposite is influenced by the dipping time, which affects the size and volume fraction of embedded gold nanoparticles.

© 2011 Chinese Optics Letters

OCIS Codes
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(310.6860) Thin films : Thin films, optical properties

Citation
Jingyue Fang, Xueao Zhang, Shiqiao Qin, and Shengli Chang, "Optical property of nanocomposite of mesoporous silica thin films incorporated with gold nanoparticles," Chin. Opt. Lett. 9, 032401- (2011)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-9-3-032401


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