Rose-Marie Latonen
@abo.fi
Faculty of Natural Science and Technology, Laboratory of Molecular Science and Engineering
Åbo Akademi University
RESEARCH, TEACHING, or OTHER INTERESTS
Analytical Chemistry, Electrochemistry, Materials Science, Spectroscopy
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Jay Pee Oña, Laura Laverdure, Rose Marie Latonen, Narendra Kumar, Markus Peurla, Ilari Angervo, Karoliina Honkala, and Henrik Grénman
American Chemical Society (ACS)
Sara Lund, Laura T. Wey, Jouko Peltonen, Johan Bobacka, Rose-Marie Latonen, and Yagut Allahverdiyeva
Royal Society of Chemistry (RSC)
This work demonstrates the innovative utilisation of sheer exfoliated few-layer graphene and graphene–CNC films as eco-friendly electrodes for efficient current extraction from cyanobacteria, promising advancements in biophotovoltaic applications.
German Araujo-Barahona, Alberto Goicoechea-Torres, Kari Eränen, Rose-Marie Latonen, Teija Tirri, Annika Smeds, Dmitry Murzin, Juan García-Serna, and Tapio Salmi
Elsevier BV
Jay Pee Oña, Rose Marie Latonen, Narendra Kumar, Jan-Erik Eriksson, Ilari Angervo, and Henrik Grénman
American Chemical Society (ACS)
Shujun Liang, Wenyang Xu, Liqiu Hu, Ville Yrjänä, Qingbo Wang, Emil Rosqvist, Luyao Wang, Jouko Peltonen, Jessica M. Rosenholm, Chunlin Xu,et al.
American Chemical Society (ACS)
One-dimensional (1D) nanomaterials of conductive polypyrrole (PPy) are competitive biomaterials for constructing bioelectronics to interface with biological systems. Synergistic synthesis using lignocellulose nanofibrils (LCNF) as a structural template in chemical oxidation of pyrrole with Fe(III) ions facilitates surface-confined polymerization of pyrrole on the nanofibril surface within a submicrometer- and micrometer-scale fibril length. It yields a core–shell nanocomposite of PPy@LCNF, wherein the surface of each individual fibril is coated with a thin nanoscale layer of PPy. A highly positive surface charge originating from protonated PPy gives this 1D nanomaterial a durable aqueous dispersity. The fibril–fibril entanglement in the PPy@LCNFs facilely supported versatile downstream processing, e.g., spray thin-coating on glass, flexible membranes with robust mechanics, or three-dimensional cryogels. A high electrical conductivity in the magnitude of several to 12 S·cm–1 was confirmed for the solid-form PPy@LCNFs. The PPy@LCNFs are electroactive and show potential cycling capacity, encompassing a large capacitance. Dynamic control of the doping/undoping process by applying an electric field combines electronic and ionic conductivity through the PPy@LCNFs. The low cytotoxicity of the material is confirmed in noncontact cell culture of human dermal fibroblasts. This study underpins the promises for this nanocomposite PPy@LCNF as a smart platform nanomaterial in constructing interfacing bioelectronics.
Elisa Lind, Hilma Mähönen, Rose-Marie Latonen, Lippo Lassila, Marja Pöllänen, Vuokko Loimaranta, and Merja Laine
Informa UK Limited
Abstract Objectives Kombuchas and other tea-based beverages are often perceived as healthy products despite the lack of knowledge on their effects on oral health. This in vitro study determined the erosive potential of commercial kombuchas, and ice teas compared to cola drinks. Materials and methods The pH and fluoride content of 7 kombuchas and 18 tea drinks were measured with ion-selective electrodes. Calcium dissolution from hydroxyapatite grains was quantified by atomic absorption spectroscopy after beverage exposure. The effect of beverages on the enamel surface was visualized by scanning electron microscopy (SEM). Distilled water, and cola drinks were used as negative and positive controls. Results The kombuchas exhibited lower pH values (2.82–3.66) than the ice teas (2.94–4.86), but still higher than the cola drinks (2.48–2.54). The fluoride concentration varied between 0.05 and 0.46 ppm and for 7 beverages the concentration was below the detection limit. The calcium release for kombuchas was 198–746 mg/l, for ice teas 16.1–507 mg/l, and for cola drinks 57.7–71.9 mg/l. Twenty-two beverages had a significantly greater calcium release than the cola drinks (p = .009–.014). The surface etching of the enamel was seen in the SEM analysis after beverage exposure. Conclusions Tea-based beverages have even higher erosive potential than cola drinks. Kombuchas especially, displayed a considerable erosive potential.
Jay Pee Oña, Rose-Marie Latonen, Narendra Kumar, Markus Peurla, Ilari Angervo, and Henrik Grénman
Elsevier BV
Sara Lund, Elisabeth Björnvik, Qingbo Wang, Xiaoju Wang, Sindhujaa Vajravel, Laura T. Wey, Yagut Allahverdiyeva, Jussi Kauppila, Jan-Henrik Smått, Jouko Peltonen,et al.
Elsevier BV
Jay Pee Oña, Rose-Marie Latonen, Narendra Kumar, Markus Peurla, Ilari Angervo, and Henrik Grénman
Elsevier BV
Sara Lund, Jussi Kauppila, Saara Sirkiä, Jenny Palosaari, Olav Eklund, Rose-Marie Latonen, Jan-Henrik Smått, Jouko Peltonen, and Tom Lindfors
Elsevier BV
Paolo Bollella, Zhanna Boeva, Rose-Marie Latonen, Kenji Kano, Lo Gorton, and Johan Bobacka
Elsevier BV
Rose-Marie Latonen, Jose Antonio Wrzosek Cabrera, Sara Lund, Sergey Kosourov, Sindhujaa Vajravel, Zhanna Boeva, Xiaoju Wang, Chunlin Xu, and Yagut Allahverdiyeva
American Chemical Society (ACS)
Bradley P. Hambly, Chandler K. Sears, Marcin Guzinski, Felio Perez, Rose-Marie Latonen, Johan Bobacka, Bradford D. Pendley, and Ernő Lindner
American Chemical Society (ACS)
To assess the feasibility of utilizing reagent-loaded, porous polymeric nanocapsules (NCs) for chemical and biochemical sensor design, the surfaces of the NCs were decorated with 3,4-ethylenedioxythiophene (EDOT) moieties. The pores in the capsule wall allow unhindered bidirectional diffusion of molecules smaller than the programmed pore sizes, while larger molecules are either entrapped inside or blocked from entering the interior of the nanocapsules. Here, we investigate two electrochemical deposition methods to covalently attach acrylate-based porous nanocapsules with 3,4-ethylenedioxythiophene moieties on the nanocapsule surface, i.e., EDOT-decorated NCs to the surface of an existing PEDOT film: (1) galvanostatic or bilayer deposition with supporting EDOT in the deposition solution and (2) potentiostatic deposition without supporting EDOT in the deposition solution. The distribution of the covalently attached NCs in the PEDOT films was studied by variable angle FTIR-ATR and XPS depth profiling. The galvanostatic deposition of EDOT-decorated NCs over an existing PEDOT (tetrakis(pentafluorophenyl)borate) [PEDOT(TPFPhB)] film resulted in a bilayer structure, with an interface between the NC-free and NC-loaded layers, that could be traced with variable angle FTIR-ATR measurements. In contrast, the FTIR-ATR and XPS analyses of the films deposited potentiostatically from a solution without EDOT and containing only the EDOT-decorated NCs showed small amounts of NCs in the entire cross section of the films.
J Palosaari, R-M Latonen, J-H Smått, S Raunio, and O Eklund
Springer Science and Business Media LLC
AbstractThe flake graphite occurrence in Piippumäki, Eastern Finland, as indicated by an airborne electromagnetic anomaly, was located during fieldwork by electromagnetic measurements with Slingram. The anomaly is approximately 0.1 × 1 km in size. The flake graphite is hosted by quartz-feldspar gneiss and amphibolite that have been subjected to retrograde metamorphism. This is observed in thin sections as granulite facies (garnet + cordierite + sillimanite + melt) regressing to greenschist facies (epidote, chlorite, albite, and white mica). The graphite (up to 1 mm large flakes) is found in graphite-bearing layers in the gneiss, and to a minor extent disseminated in the amphibolite. The average total sulfur (TS) is 0.33%, total carbon (TC) is 6.49%, and the average content of graphitic carbon (Cg) is 6.41% for the analyzed graphite-bearing rocks. SEM, XRD, and Raman spectroscopy were used for analyzing the flake graphite, indicating that the graphite is almost defect-free, of high quality, and has not been affected by the retrograde metamorphism. The peak metamorphic temperature of 737 °C was determined by a Raman thermometer, and no temperatures of greenschist facies were observed. A pseudosection was constructed from whole-rock chemical composition and indicated equilibration at ca 5 kbar and 740 °C, which corresponds to the observed mineral assemblages.
Narender Kumar Joon, Jonathan E. Barnsley, Ruiyu Ding, Sunri Lee, Rose-Marie Latonen, Johan Bobacka, Keith C. Gordon, Takuji Ogawa, and Grzegorz Lisak
Elsevier BV
Jesus Arroyo, Marceline Akieh-Pirkanniemi, Grzegorz Lisak, Rose-Marie Latonen, and Johan Bobacka
Elsevier BV
Maija Blomquist, Sara Lund, Ari Ivaska, Kalle Levon, and Rose-Marie Latonen
Elsevier BV
Ning He, Soma Papp, Tom Lindfors, Lajos Höfler, Rose-Marie Latonen, and Róbert E. Gyurcsányi
American Chemical Society (ACS)
Electrically conducting polymers (ECPs) are one of the most popular types of materials to interface ion-selective membranes (ISMs) with electron-conducting substrates to construct solid-contact ion-selective electrodes (SCISEs). For optimal ion-to-electron transduction and potential stability, the p-doped ECPs with low oxidation potentials such as PPy need to be generally in their conducting form along with providing a sufficiently hydrophobic interface to counteract the aqueous layer formation. The first criterion requires that the ECPs are in their oxidized state, but the high charge density of this state is detrimental for the prevention of the aqueous layer formation. We offer here a solution to this paradox by implementing a highly hydrophobic perfluorinated anion (perfluorooctanesulfonate, PFOS-) as doping ion by which the oxidized form of the ECP becomes hydrophobic. The proof of concept is shown by using polypyrrole (PPy) films doped with PFOS- (PPy-PFOS) as the solid contact in K+-selective SCISEs (K+-SCISE). Prior to applying the plasticized poly(vinyl chloride) ISM, the oxidation state of the electrodeposited PPy-PFOS was adjusted by polarization to the known open-circuit potential of the solid contact in 0.1 M KCl. We show that the prepolarization results in a hydrophobic PPy-PFOS film with a water contact angle of 97 ± 5°, which effectively prevents the aqueous layer formation under the ISM. Under optimal conditions the K+-SCISEs had a very low standard deviation of E0 of only 501.0 ± 0.7 mV that is the best E0 reproducibility reported for ECP-based SCISEs.
R.-M. Latonen, A. Määttänen, P. Ihalainen, W. Xu, M. Pesonen, M. Nurmi, and C. Xu
Royal Society of Chemistry (RSC)
A highly conducting water-based ink composed of cellulose nanocrystals and polyaniline was prepared for flexographical printing by the emulsion polymerization approach.
Jenny Palosaari, Rose-Marie Latonen, Jan-Henrik Smått, Rasmus Blomqvist, and Olav Eklund
Geological Society of Norway
Manzar Sohail, Roland De Marco, Zdeňka Jarolímová, Marcin Pawlak, Eric Bakker, Ning He, Rose-Marie Latonen, Tom Lindfors, and Johan Bobacka
American Chemical Society (ACS)
The transportation and accumulation of redox active species at the buried interface between glassy carbon electrodes and plasticized polymeric membranes have been studied using synchrotron radiation X-ray photoelectron spectroscopy (SR-XPS), near edge X-ray absorption fine structure (NEXAFS), in situ electrochemical Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy, cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). Ferrocene tagged poly(vinyl chloride) [FcPVC], ferrocene (Fc), and its derivatives together with tetracyanoquinodimethane (TCNQ) doped plasticized polymeric membrane electrodes have been investigated, so as to extend the study of the mechanism of this reaction chemistry to different time scales (both small and large molecules with variable diffusion coefficients) using a range of complementary electrochemical and surface analysis techniques. This study also provides direct spectroscopic evidence for the transportation and electrochemical reactivity of redox active species, regardless of the size of the electrochemically reactive molecule, at the buried interface of the substrate electrode. With all redox dopants, when CA electrolysis was performed, redox active species were undetectable (<1 wt % of signature elements or below the detection limit of SR-XPS and NEXAFS) in the outermost surface layers of the membrane, while a high concentration of redox species was located at the electrode substrate as a consequence of the deposition of the reaction product (Fc(+)-anion complex) at the buried interface between the electrode and the membrane. This reaction chemistry for redox active species within plasticized polymeric membranes may be useful in the fashioning of multilayered polymeric devices (e.g., chemical sensors, organic electronic devices, protective laminates, etc.) based on an electrochemical tunable deposition of redox molecules at the buried substrate electrode beneath the membrane.
Ning He, Lajos Höfler, Rose-Marie Latonen, and Tom Lindfors
Elsevier BV
Cristina Dumitriu, Andrei Bogdan Stoian, Irina Titorencu, Vasile Pruna, Victor V. Jinga, Rose-Marie Latonen, Johan Bobacka, and Ioana Demetrescu
Elsevier BV
Patrycja Bober, Jun Liu, Kirsi S. Mikkonen, Petri Ihalainen, Markus Pesonen, Carme Plumed-Ferrer, Atte von Wright, Tom Lindfors, Chunlin Xu, and Rose-Marie Latonen
American Chemical Society (ACS)
In this work, flexible and free-standing composite films of nanofibrillated cellulose/polypyrrole (NFC/PPy) and NFC/PPy-silver nanoparticles (NFC/PPy-Ag) have been synthesized for the first time via in situ one-step chemical polymerization and applied in potential biomedical applications. Incorporation of NFC into PPy significantly improved its film formation ability resulting in composite materials with good mechanical and electrical properties. It is shown that the NFC/PPy-Ag composite films have strong inhibition effect against the growth of Gram-positive bacteria, e.g., Staphylococcus aureus. The electrical conductivity and strong antimicrobial activity makes it possible to use the silver composites in various applications aimed at biomedical treatments and diagnostics. Additionally, we report here the structural and morphological characterization of the composite materials with Fourier-transform infrared spectroscopy, atomic force microscopy, and scanning and transmission electron microscopy techniques.