Jukka Ketoja

Principal Scientist

  • Phone+358405476146
1984 …2021

Research output per year

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Research Output

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2020

Bubble Attachment to Cellulose and Silica Surfaces of Varied Surface Energies: Wetting Transition and Implications in Foam Forming

Ketola, A. E., Xiang, W., Hjelt, T., Pajari, H., Tammelin, T., Rojas, O. J. & Ketoja, J. A., Jul 2020, In : Langmuir : the ACS journal of surfaces and colloids. 36, 26, p. 7296-7308 13 p.

Research output: Contribution to journalArticleScientificpeer-review

Crossover from mean-field compression to collective phenomena in low-density foam-formed fiber material

Mäkinen, T., Koivisto, J., Pääkkönen, E., Ketoja, J. A. & Alava, M. J., 2020, In : Soft Matter. 16, 29, p. 6819-6825 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
1 Citation (Scopus)

High Internal Phase Oil-in-Water Pickering Emulsions Stabilized by Chitin Nanofibrils: 3D Structuring and Solid Foam

Zhu, Y., Huan, S., Bai, L., Ketola, A., Shi, X., Zhang, X., Ketoja, J. A. & Rojas, O. J., 4 Mar 2020, In : ACS Applied Materials and Interfaces. 12, 9, p. 11240-11251 12 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

On the strength improvement of lightweight fibre networks by polymers, fibrils and fines

Pöhler, T., Ketoja, J. A., Lappalainen, T., Luukkainen, V., Nurminen, I., Lahtinen, P. & Torvinen, K., 1 Aug 2020, In : Cellulose. 27, 12, p. 6961-6976 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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1 Citation (Scopus)
14 Downloads (Pure)
2019

Chirality and bound water in the hierarchical cellulose structure

Paajanen, A., Ceccherini, S., Maloney, T. & Ketoja, J. A., 1 Jul 2019, In : Cellulose. 26, 10, p. 5877-5892 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
11 Citations (Scopus)

Compression strength mechanisms of low-density fibrous materials

Ketoja, J. A., Paunonen, S., Jetsu, P. & Pääkkönen, E., 26 Jan 2019, In : Materials. 12, 3, 384.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
4 Citations (Scopus)

How Cellulose Nanofibrils Affect Bulk, Surface, and Foam Properties of Anionic Surfactant Solutions

Xiang, W., Preisig, N., Ketola, A., Tardy, B. L., Bai, L., Ketoja, J. A., Stubenrauch, C. & Rojas, O. J., 9 Dec 2019, In : Biomacromolecules. 20, 12, p. 4361-4369 9 p.

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
2018

Density development in foam forming: Wet pressing dynamics

Järvinen, M., Pihko, R. & Ketoja, J. A., 26 Jul 2018, In : Nordic Pulp and Paper Research Journal. 33, 2, p. 226-236 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
2 Citations (Scopus)

Improving Compression Recovery of Foam-formed Fiber Materials

Paunonen, S., Timofeev, O., Torvinen, K., Turpeinen, T. & Ketoja, J., 2018, In : BioResources. 13, 2, p. 4058-4074 17 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
3 Citations (Scopus)

Versatile templates from cellulose nanofibrils for photosynthetic microbial biofuel production

Jämsä, M., Kosourov, S., Rissanen, V., Hakalahti, M., Pere, J., Ketoja, J. A., Tammelin, T. & Allahverdiyeva, Y., 14 Apr 2018, In : Journal of Materials Chemistry A: Materials for Energy and Sustainability. 6, 14, p. 5825-5835 11 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
2017

Design-driven integrated development of technical and perceptual qualities in foam-formed cellulose fibre materials

Härkäsalmi, T., Lehmonen, J., Itälä, J., Peralta, C., Siljander, S. & Ketoja, J., 2017, In : Cellulose. 24, 11, p. 5053-5068 16 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Structural properties and foaming of plant cell wall polysaccharide dispersions

Beatrice, C. A. G., Rosa-Sibakov, N., Lille, M., Sözer, N., Poutanen, K. & Ketoja, J. A., 1 Oct 2017, In : Carbohydrate Polymers. 173, p. 508-518 11 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
2016

Atomistic molecular dynamics simulations on the interaction of TEMPO-oxidized cellulose nanofibrils in water

Paajanen, A., Sonavane, Y., Ignasiak, D., Ketoja, J. A., Maloney, T. C. & Paavilainen, S., 2016, In : Cellulose. 23, 6, p. 3449-3462

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
4 Citations (Scopus)

Porous structure of fibre networks formed by a foaming process: a comparative study of different characterization techniques

Al-Qararah, A. M., Ekman, A., Hjelt, T., Kiiskinen, H., Timonen, J. & Ketoja, J. A., 2016, In : Journal of Microscopy. 264, 1, p. 88-101

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
2015

A unique microstructure of the fiber networks deposited from foam-fiber suspensions

Al-Qararah, A. M., Ekman, A., Hjelt, T., Ketoja, J. A., Kiiskinen, H., Koponen, A. & Timonen, J., 2015, In : Colloids and Surfaces A: Physicochemical and Engineering Aspects. 482, p. 544-553

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Response of wet foam to fibre mixing

Al-Qararah, A. M., Hjelt, T., Koponen, A., Harlin, A. & Ketoja, J., 2015, In : Colloids and Surfaces A: Physicochemical and Engineering Aspects. 467, p. 97-106

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)
2014

Drying of Pigment-Cellulose Nanofibril Substrates

Timofeev, O., Torvinen, K., Sievänen, J., Kaljunen, T., Kouko, J. & Ketoja, J., 2014, In : Materials. 7, 10, p. 6893-6907

Research output: Contribution to journalArticleScientificpeer-review

Open Access
7 Citations (Scopus)
2013

Bubble size and air content of wet fibre foams in axial mixing with macro-instabilities

Al.Qararah, A., Hjelt, T., Koponen, A., Harlin, A. & Ketoja, J., 2013, In : Colloids and Surfaces A: Physicochemical and Engineering Aspects. 436, p. 1130-1139 9 p.

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Filler-nanocellulose substrate for printed electronics: Experiments and model approach to structure and conductivity

Penttilä, A., Sievänen, J., Torvinen, K., Ojanperä, K. & Ketoja, J., 2013, In : Cellulose. 20, 3, p. 1413-1424 12 p.

Research output: Contribution to journalArticleScientificpeer-review

33 Citations (Scopus)
2012

Exceptional pore size distribution in foam-formed fibre networks

Al-Qararah, A., Hjelt, T., Kinnunen, K., Beletski, N. & Ketoja, J., 2012, In : Nordic Pulp and Paper Research Journal. 27, 2, p. 226-230 4 p.

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)

Mechanical properties of cellulose nanofibrils determined through atomistic molecular dynamics simulations

Paavilainen, S., McWhirter, J. L., Róg, T., Järvinen, J., Vattulainen, I. & Ketoja, J., 2012, In : Nordic Pulp and Paper Research Journal. 27, 2, p. 282-286 4 p.

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)
2010

The role of binder type in determining inkjet print quality

Lamminmäki, T., Kettle, J., Puukko, P., Ketoja, J. & Gane, P., 2010, In : Nordic Pulp and Paper Research Journal. 25, 3, p. 380-390 11 p.

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)
2008

Simulation of triaxial deformation of wet fiber networks

Miettinen, P. P. J. & Ketoja, J. A., 20 Oct 2008, In : Nordic Pulp and Paper Research Journal. 23, 3, p. 264-271 8 p.

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
2007

Simulated strength of wet fibre networks

Miettinen, P. P. J., Ketoja, J. A. & Klingenberg, D. J., 1 Oct 2007, In : Journal of Pulp and Paper Science. 33, 4, p. 199-205 7 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Simulated structure of wet fiber networks

Miettinen, P. P. J., Ketoja, J. A. & Hjelt, T., 1 Dec 2007, In : Nordic Pulp and Paper Research Journal. 22, 4, p. 516-522 7 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
2006

13. Fundamental Research Symposium Cambridgessä

Hjelt, T., Ketoja, J. & Sirviö, J., 2006, In : Paperi ja puu. 88, p. 21-23 2 p.

Research output: Contribution to journalArticleScientific

Theoretical and experimental study on phase transitions and mass fluxes of supersaturated water vapor onto different insoluble flat surfaces

Lauri, A., Riipinen, I., Ketoja, J. A., Vehkamäki, H. & Kulmala, M., 21 Nov 2006, In : Langmuir. 22, 24, p. 10061-10065 5 p.

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
2002

Diffusion of volatile compounds in fibre networks: Experiments and modelling by random walk simulation

Aurela, B. & Ketoja, J. A., 25 Apr 2002, In : Food Additives and Contaminants. 19, Sup1, p. 56-62 7 p.

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

Diffusion through fibre networks

Hellén, E. K. O., Ketoja, J. A., Niskanen, K. J. & Alava, M. J., 1 Feb 2002, In : Journal of Pulp and Paper Science. 28, 2, p. 55-62 8 p.

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)
1999

Correlated disorder and propagating modes in the frenkel-kontorova model

Ketoja, J. A. & Satija, I. I., 1 Jan 1999, In : Physical Review B - Condensed Matter and Materials Physics. 59, 14, p. 9174-9184 11 p.

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Heat transfer to paper in a hot nip

Simula, S., Ketoja, J. A. & Niskanen, K., 1 Dec 1999, In : Nordic Pulp and Paper Research Journal. 14, 4, p. 273-278 6 p.

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Localization and fluctuations in quantum kicked rotors

Satija, I. I., Sundaram, B. & Ketoja, J. A., 1 Jan 1999, In : Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics. 60, 1, p. 453-458

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
1997

"Critical" phonons of the supercritical Frenkel-Kontorova model: Renormalization bifurcation diagrams

Ketoja, J. A. & Satija, I. I., 1 Jan 1997, In : Physica D: Nonlinear Phenomena. 104, 3-4, p. 239-252 14 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Fractal characteristics of critical and localized states in incommensurate quantum systems

Satija, I. I. & Ketoja, J. A., 1 Jan 1997, In : Pramana: Journal of Physics. 48, 2, p. 589-601 13 p.

Research output: Contribution to journalArticleScientificpeer-review

Harper equation, the dissipative standard map and strange nonchaotic attractors: Relationship between an eigenvalue problem and iterated maps

Ketoja, J. A. & Satija, I. I., 1 Jan 1997, In : Physica D: Nonlinear Phenomena. 109, 1-2, p. 70-80 11 p.

Research output: Contribution to journalArticleScientificpeer-review

57 Citations (Scopus)

The re-entrant phase diagram of the generalized Harper equation

Ketoja, J. A. & Satija, I. I., 3 Feb 1997, In : Journal of Physics Condensed Matter. 9, 5, p. 1123-1132 10 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
1995

Decimation studies of Bloch electrons in a magnetic field: Higher-order limit cycles underlying the phase diagram

Ketoja, J. A., Satija, I. I. & Chaves, J. C., 1 Jan 1995, In : Physical Review B. 52, 5, p. 3026-3029 4 p.

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Quantum spin chains in aperiodic magnetic fields

Chaves, J. C., Satija, I. I. & Ketoja, J. A., 1 Dec 1995, In : Physica Scripta. 52, 6, p. 614-623 10 p.

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Renormalization approach to quasiperiodic quantum spin chains

Ketoja, J. A. & Satija, I. I., 15 Sep 1995, In : Physica A: Statistical Mechanics and its Applications. 219, 1-2, p. 212-233 22 p.

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Self-similarity and localization

Ketoja, J. A. & Satija, I. I., 1 Jan 1995, In : Physical Review Letters. 75, 14, p. 2762-2765 4 p.

Research output: Contribution to journalArticleScientificpeer-review

40 Citations (Scopus)
1994

Binary tree approach to scaling in unimodal maps

Ketoja, J. A. & Kurkijärvi, J., 1 May 1994, In : Journal of Statistical Physics. 75, 3-4, p. 643-668 26 p.

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Renormalization approach to quasiperiodic tight binding models

Ketoja, J. A. & Satij, I. I., 24 Oct 1994, In : Physics Letters A. 194, 1-2, p. 64-70 7 p.

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

Rotationally-ordered periodic orbits for multiharmonic area-preserving twist maps

Ketoja, J. A. & MacKay, R. S., 15 Jun 1994, In : Physica D: Nonlinear Phenomena. 73, 4, p. 388-398 11 p.

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
1992

Renormalisation in a circle map with two inflection points

Ketoja, J. A., 1 Jan 1992, In : Physica D: Nonlinear Phenomena. 55, 1-2, p. 45-68 24 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Universal criterion for the breakup of invariant tori in dissipative systems

Ketoja, J. A., 1 Jan 1992, In : Physical Review Letters. 69, 15, p. 2180-2183 4 p.

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
1990

Breakup of Kolmogorov-Arnold-Moser tori of arbitrary frequency in a two-parameter system

Ketoja, J. A., 1 Jan 1990, In : Physical Review A. 42, 2, p. 775-780 6 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
1989

Fibonacci bifurcation sequences and the Cvitanović-Feigenbaum functional equation

Ketoja, J. A. & Piirilä, O. P., 17 Jul 1989, In : Physics Letters A. 138, 9, p. 488-492 5 p.

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Fractal boundary for the existence of invariant circles for area-preserving maps: Observations and renormalisation explanation

Ketoja, J. A. & MacKay, R. S., 1 Jan 1989, In : Physica D: Nonlinear Phenomena. 35, 3, p. 318-334 17 p.

Research output: Contribution to journalArticleScientificpeer-review

43 Citations (Scopus)
1986

Universality of the window structure and the density of aperiodic solutions in dissipative dynamical systems

Ketoja, J. A. & Kurkijarvi, J., 1 Jan 1986, In : Physical Review A. 33, 4, p. 2846-2849 4 p.

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)