About department

Field of Scientific Interest

The main focus in the research of the Department of Hydrosilicates has been on the composition and properties of the fine fractions of bentonites, the clay raw materials containing dominantly montmorillonite or other minerals of the smectite group. Mineralogical and chemical composition and chemical modifications, including replacement of exchangeable cations by various inorganic and organic cations of selected properties and cationic dyes, partial dissolution in acids have been recently studied using mainly spectroscopic methods. Original interpretation of the first overtones and combination vibrations showed that near-infrared spectroscopy provides valuable information on the structure of analysed materials. Hybrid materials based on clay minerals and cationic dyes exhibit interesting properties, such as changes of the energy of absorbed and emitted light, excitation energy transfer, photosensitization, optical anisotropy, etc. These changes are related to the formation of specific supramolecular assemblies of dye cations on the surface of clay mineral particles.


  • Head of department: Ing. Helena Pálková, PhD.


Selected publications

AZZI, Andrezza de Almeida – UHLÍK, Peter – OSACKÝ, Marek – ZANARDO, Antenor – PÁLKOVÁ, Helena. Changes in technological properties and microstructure of clayey raw materials from the Corumbataí Formation upon drying: Relevance to dry route tilemaking process. In Applied Clay Science, 2018, vol. 157, p. 92-101.

BARANYAIOVÁ, Timea – BUJDÁK, Juraj. Effects of dye surface concentration on the molecular aggregation of xanthene dye in colloidal dispersions of montmorillonite. In Clays and Clay Minerals, 2018, vol. 66, no. 2, p. 114-126.

BELUŠÁKOVÁ, Silvia – SOLA-LLANO, R. – LOPEZ ARBELOA, I. – MARTÍNEZ-MARTÍNEZ, V. – BUJDÁK, Juraj. Resonance energy transfer between dye molecules in hybrid films of a layered silicate, including the effect of dye concentration thereon. In Applied Clay Science, 2018, vol. 155, p. 57-64.

BIZOVSKÁ, Valéria – JANKOVIČ, Ľuboš – MADEJOVÁ, Jana. Montmorillonite modified with unconventional surfactants from the series of octylammonium-based cations: Structural characterization and hydration properties. In Applied Clay Science, 2018, vol. 158, p. 102-112.

BOHÁČ, PeterBUJDÁK, Juraj. Tuning the photophysical properties of cyanine dyes with clay minerals. In Clays and Clay Minerals, 2018, vol. 66, no. 2, p. 127-137.

BUJDÁK, Juraj. The effects of layered nanoparticles and their properties on the molecular aggregation of organic dyes. In Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2018, vol. 35, p. 108-133.

BUJDÁKOVÁ, Helena – BUJDÁKOVÁ, Veronika – MÁJEKOVÁ, Hyacinta – GAÁLOVÁ, B. – BIZOVSKÁ, Valéria – BOHÁČ, Peter – BUJDÁK, Juraj. Antimicrobial activity of organoclays based on quaternary alkylammonium and alkylphosphonium surfactants and montmorillonite. In Applied Clay Science, 2018, vol. 158, no., p. 21-28.

JOCHEC MOŠKOVÁ, Daniela – JANIGOVÁ, Ivica – NÓGELLOVÁ, Zuzana – SEDNIČKOVÁ, Michaela – JANKOVIČ, Ľuboš – KOMADEL, Peter – ŠLOUF, Miroslav – CHODÁK, Ivan. Prediction of compatibility of organomodified clay with various polymers using rheological measurements. In Polymer Testing, 2018, vol. 69, p. 359-365.

KRONEK, Juraj – NEDBAL, Jan – VALENTOVÁ, Helena – NEUBERT, Milan – JANIGOVÁ, Ivica – PETRENČÍKOVÁ, Nadežda – ŠRÁMKOVÁ, Petra – CSOMOROVÁ, Katarína – PETRA, Lukáš. Thermal stability and structural anisotropy of semiaromatic poly(ester amides) from aromatic bis(2-oxazolines) and aliphatic dicarboxylic acids. In Polymer Testing, 2018, vol. 68, p. 1-7.

PENTRÁK, Martin – HRONSKÝ, Viktor – PÁLKOVÁ, Helena – UHLÍK, Peter – KOMADEL, PeterMADEJOVÁ, Jana. Alteration of fine fraction of bentonite from Kopernica (Slovakia) under acid treatment: A combined XRD, FTIR, MAS NMR and AES study. In Applied Clay Science, 2018, vol. 163, no., p. 204-213.

SERWICKA, Ewa M. – ZIMOWSKA, Malgorzata – DURACZYNSKA, Dorota – NAPRUSZEWSKA, Bogna D. – NATTICH-RAK, Malgorzata – MORDARSKI, Grzegorz – LITYNSKA-DOBRZYNSKA, L. – PÁLKOVÁ, Helena. PDDA-montmorillonite composites loaded with Ru nanoparticles: Synthesis, characterization, and catalytic properties in hydrogenation of 2-butanone. In POLYMERS-BASEL, 2018, vol. 10, iss. 8, p. 865-879.

SCHOLTZOVÁ, Eva – JANKOVIČ, Ľuboš – TUNEGA, Daniel. Stability of tetrabutylphosphonium beidellite organoclay. In Journal of Physical Chemistry C, 2018, vol. 122, no. 15, p. 8380-8389. ISSN 1932-7447.


International and National Projects

Functionalization of clay minerals using unconventional organic surfactants
(Funkcionalizácia ílových minerálov netradičnými organickými surfaktantmi)
Programme: VEGA 2/0141/17
Project coordinator IIC: RNDr. Madejová Jana DrSc.
Duration: 01/2017-12/2020
Photoactive hybrid materials
(Fotoaktívne hybridné materiály)
Programme: VEGA 2/0156/17
Project coordinator IIC: Mgr. A. Czímerová, PhD.
Duration: 01/2017-12/2020
Nanomat – Nanocomposite materials based on organo-phosphonium smectites and polymers
(Nanokompozitné materiály na báze organo-fosfóniových smektitov a polymérov)
Programme: APVV-15-0741
Project coordinator IIC: Mgr. Ľuboš Jankovič, PhD.
Partner: Institute of Polymers SAS
Duration: 07/2016-06/2020
BiofNano – Prevention and eradication of microbial biofilms in relationship to nanomaterials
(Prevencia a eradikácia mikrobiálnych biofilmov vo vzťahu k nanomateriálom)
Programme: APVV-15-0347
Project coordinator: Faculty of Natural Sciences Comenius University, Bratislava
Principal investigator IIC: doc. RNDr. J. Bujdák, DrSc.
Duration: 07/2016-06/2020


Foreign cooperating institutions

  • Heyrovsky Institute of Physical Chemistry of the ASCR, Prague, Czech Republic
  • Institute of Chemistry, Academy of Sciences of the Czech Republic, Czech Republic
  • Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
  • Institute of Polymers, Bulgarian Academy of Sciences, Sofia, Bulgaria
  • University of Poitiers, CNRS, HydrASA, Poitiers, France
  • University of Aveiro, Aveiro, Portugal
  • University of Ioannina, Ioannina, Greece
  • Sheffield Hallam University, Sheffield, UK
  • National Institute for Materials Science, Tsukuba, Japan
  • Nagoya University, Graduate School of Engineering, Nagoya, Japan
  • Tokyo Metropolitan University Faculty of Urban Environmental Sciences, Tokyo, Japan
  • Yamaguchi University, Graduate School of Medicine, Yamaguchi, Japan
  • University of Illinois, Champaign-Urbana, USA
  • Monash University, Melbourne, Australia