, Volume 17, Issue 5, pp 923–936 | Cite as

Radially oriented cellulose triacetate chains on gold nanoparticles

  • Yukiko Enomoto-Rogers
  • Hiroshi Kamitakahara
  • Arata Yoshinaga
  • Toshiyuki Takano


Cellulose triacetate (CTA) derivatives having a disulfide group at the reducing-end (CTA2S, CTA13S, CTA41S), with number average degrees of polymerization (DPns) of 2, 13 and 41, respectively, were prepared. The CTA-self-assembled gold nanoparticles (CTA2Au, CTA13Au, and CTA41Au) were obtained through the reduction of gold salt (HAuCl4) with CTASs. The diameters (d) and the interparticle distances (L) of the gold cores were analyzed by transmission electron microscopy (TEM) observations. The d values of CTA2Au, CTA13Au, and CTA41Au, were 8.7, 7.9, and 13.4 nm respectively. The L values of CTA2Au, CTA13Au, and CTA41Au, were 2.8, 6.3, and 20.9 nm, respectively, and agreed well with the molecular length (l) of CTAS chains (ls of CTA2S, CTA13S, CTA41S = 2.0, 7.5, 21.5 nm, respectively). The hydrodynamic diameters (D) of CTAAu nanoparticles in chloroform solution, measured by dynamic light scattering (DLS), were larger than the d values and increased with the increase in the molecular length of the CTA chains. The CTAS chain was found to work as an excellent stabilizer of the gold nanoparticles in both solid state and solution. The molecular length of CTA chains controlled the size and the alignment of the gold nanoparticles. As a result, the radially oriented CTA chains on the gold nanoparticles were successfully prepared.


Cellulose triacetate Reducing-end Gold nanoparticles Orientation Self-assembly 



This study was supported in part by a Grand-in-Aid from a Research Fellowships of the Japan Society for the Promotion of Science (JSPS) for Young Scientists (Y.E-R), and by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, and Culture of Japan (Nos. 18688009 and 21580205).

Supplementary material

10570_2010_9437_MOESM1_ESM.ppt (152 kb)
Supplementary material 1 (PPT 151 kb)


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Yukiko Enomoto-Rogers
    • 1
  • Hiroshi Kamitakahara
    • 1
  • Arata Yoshinaga
    • 1
  • Toshiyuki Takano
    • 1
  1. 1.Division of Forest and Biomaterials Science, Graduate School of AgricultureKyoto UniversityKyotoJapan

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