, 16:319 | Cite as

Incorporation into paper of cellulose triacetate films containing semiconductor nanoparticles

  • Tiffany Abitbol
  • Derek G. Gray


CdSe/ZnS quantum dots (QDs) were embedded in films of cellulose triacetate (CTA) to give clear films with the broad absorbance and well-defined, size-tunable fluorescence characteristic of QDs. The relative quantum yields of the QDs in polymer were compared to that of the initial QDs dispersed in toluene. Alkaline hydrolysis of the film surfaces to regenerated cellulose rendered the previously hydrophobic CTA film surfaces hydrophilic and compatible with aqueous papermaking. Films containing combinations of different sized QDs gave more complex emission patterns. Small pieces of fluorescent films were added to pulp slurries and incorporated into laboratory paper sheets through hydrogen bonding between the regenerated cellulose film surfaces and cellulosic pulp fibers. The film system (cellulose ester bulk/cellulose surface) can be used to incorporate hydrophobic particles or molecules compatible with solutions of cellulosic polymers into paper products at both high and low loadings. QDs in paper may prove useful for security applications, such as sheets with unique optical signatures.


Cellulose triacetate CdSe/ZnS quantum dots Fluorescence Paper 



We thank NSERC Canada and FPInnovations/Paprican for financial support and the Centre for Self-Assembled Chemical Structures (CSACS) for use of laboratory equipment. T. A. thanks Dr. N. Ulkem and J.M. Berry for helpful discussion.


  1. Abitbol T, Gray DG (2007) CdSe/ZnS QDs embedded in cellulose triacetate films with hydrophilic surfaces. Chem Mater 19(17):4270–4276. doi: 10.1021/cm0704332 CrossRefGoogle Scholar
  2. Braun JL, Kadla JF (2005) Diffusion and saponification inside porous cellulose triacetate fibers. Biomacromolecules 6(1):152–160. doi: 10.1021/bm0496413 CrossRefGoogle Scholar
  3. Chang S, Zhou M, Grover CP (2003) Information coding and retrieving using fluorescent semiconductor nanocrystals for object identification. Opt Express 12:143–148. doi: 10.1364/OPEX.12.000143 CrossRefGoogle Scholar
  4. Chen Y, Xiong X-P, Yang G, Zhang L-N, Lei S-L, Liang H (2002) Characterization of regenerated cellulose membranes hydrolyzed from cellulose acetate. Chin J Polym Sci 20(4):369–375Google Scholar
  5. Edgar KJ (2007) Cellulose esters in drug delivery. Cellulose 14:49–64. doi: 10.1007/s10570-006-9087-7 CrossRefGoogle Scholar
  6. Edgar KJ, Buchanan CM, Debenham JS, Rundquist PA, Seiler BD, Shelton MC, Tindall D (2001) Advances in cellulose ester performance and application. Prog Polym Sci 26:1605–1688. doi: 10.1016/S0079-6700(01)00027-2 CrossRefGoogle Scholar
  7. El Seoud OA, Heinze T (2005) Organic esters of cellulose: new perspectives for old polymers. Adv Polym Sci 186:103–149. doi: 10.1007/b136818 CrossRefGoogle Scholar
  8. Ilharco LM, Brito de Barros R (2000) Aggregation of pseudoisocyanine iodide in cellulose acetate films: structural characterization by FTIR. Langmuir 16(24):9331–9337. doi: 10.1021/la000579e CrossRefGoogle Scholar
  9. Lee J, Sundar VC, Heine JR, Bawendi MG, Jensen KF (2000) Full color emission from II to VI semiconductor quantum dot-polymer composites. Adv Mater 12(15):1102–1105. doi: 10.1002/1521-4095(200008)12:15<1102::AID-ADMA1102>3.0.CO;2-J CrossRefGoogle Scholar
  10. Li Y, Rizzo A, Cingolani R, Gigli G (2007) White-light-emitting diodes using semiconductor nanocrystals. Mickochim Acta 159:207–215. doi: 10.1007/s00604-007-0740-0 CrossRefGoogle Scholar
  11. Murphy CJ (2002) Optical sensing with quantum dots. Anal Chem 74(19):520A–526ACrossRefGoogle Scholar
  12. Murray CB, Norris DJ, Bawendi MG (1993) Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites. J Am Chem Soc 115(19):8706–8715. doi: 10.1021/ja00072a025 CrossRefGoogle Scholar
  13. Ritcey AM, Gray DG (1988) Cholesteric order in gels and films of regenerated cellulose. Biopolymers 27(9):1363–1374. doi: 10.1002/bip.360270904 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Department of ChemistryMcGill UniversityMontrealCanada

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