Anomalous-Diffusion-Assisted Brightness in White Cellulose Nanofibril Membranes

Matti S. Toivonen, Olimpia D. Onelli, Gianni Jacucci, Ville Lovikka, Orlando J. Rojas, Olli Ikkala*, Silvia Vignolini

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

36 Citations (Scopus)
147 Downloads (Pure)


The understanding of the interaction between light and complex, random structures is the key for designing and tailoring the optical appearance and performance of many materials that surround us, ranging from everyday consumer products, such as those for personal care, paints, and paper, to light diffusers used in the LED-lamps and solar cells. Here, it is demonstrated that the light transport in membranes of pure cellulose nanofibrils (CNFs) can be controlled to achieve bright whiteness in structures only a few micrometers thick. This is in contrast to other materials, such as paper, which require hundreds of micrometers to achieve a comparable appearance. The diffusion of light in the CNF membranes is shown to become anomalous by tuning the porosity and morphological features. Considering also their strong mechanical properties and biocompatibility, such white coatings are proposed as a new application for cellulose nanofibrils.

Original languageEnglish
Article number1704050
Pages (from-to)1-7
JournalAdvanced Materials
Issue number16
Early online date2018
Publication statusPublished - Apr 2018
MoE publication typeA1 Journal article-refereed


  • Anomalous diffusion
  • Cellulose nanofibrils
  • Nanocellulose
  • Scattering
  • Whiteness

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  • Projects

    HYBER: The Academy of Finland's Centre of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials research (2014-2019)

    Cherian, T., Nonappa, N., Ikkala, O., Bertula, K., Morits, M., Hynninen, V., Myllymäki, T., Toivonen, M., Sohrabi, F., Haataja, J., Sanchez Sanchez, A., Rissanen, S. & Poutanen, M.


    Project: Academy of Finland: Other research funding



    Anna Rissanen (Manager)

    Aalto University

    Facility/equipment: Facility

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