Staff directory

Jordi Fraxedas Calduch

CSIC Scientific Researcher and Group Leader
Force Probe Microscopy and Surface Nanoengineering



  • A statistical analysis of nanocavities replication applied to injection moulding

    Pina-Estany J., Colominas C., Fraxedas J., Llobet J., Perez-Murano F., Puigoriol-Forcada J.M., Ruso D., Garcia-Granada A.A. International Communications in Heat and Mass Transfer; 81: 131 - 140. 2017. 10.1016/j.icheatmasstransfer.2016.11.003. IF: 3.718

    The purpose of this paper is to investigate both theoretically and experimentally how nanocavities are replicated in the injection moulding manufacturing process. The objective is to obtain a methodology for efficiently replicate nanocavities. From the theoretical point of view, simulations are carried out using a submodeling approach combining Solidworks Plastics for a first macrosimulation and Fluent solver for a subsequent nanosimulation. The effect of the four main factors (melt temperature, mould temperature, filling time and cavity geometry) are quantified using an statistical 24 factorial experiment. It is found that the main effects are the cavity length, the mould temperature and the polymer temperature, with standardized effects of 5, 3 and 2.6, respectively. Filling time has a negative 1.3 standardized effect. From the experimental point of view, Focused Ion Beam technique is used for mechanizing nanocavities in a steel mould. The replication achieved in polycarbonate injection is quantified using an Atomic Force Microscope. It is observed how both the geometry and the position of the cavities in the mould affect its replication. © 2016 Elsevier Ltd

  • Functional dependence of resonant harmonics on nanomechanical parameters in dynamic mode atomic force microscopy

    Gramazio F., Lorenzoni M., Pérez-Murano F., Trinidad E.R., Staufer U., Fraxedas J. Beilstein Journal of Nanotechnology; 8 (1, 90) 2017. 10.3762/bjnano.8.90. IF: 3.127

    We present a combined theoretical and experimental study of the dependence of resonant higher harmonics of rectangular cantilevers of an atomic force microscope (AFM) as a function of relevant parameters such as the cantilever force constant, tip radius and free oscillation amplitude as well as the stiffness of the sample's surface. The simulations reveal a universal functional dependence of the amplitude of the 6th harmonic (in resonance with the 2nd flexural mode) on these parameters, which can be expressed in terms of a gun-shaped function. This analytical expression can be regarded as a practical tool for extracting qualitative information from AFM measurements and it can be extended to any resonant harmonics. The experiments confirm the predicted dependence in the explored 3-45 N/m force constant range and 2-345 GPa sample's stiffness range. For force constants around 25 N/m, the amplitude of the 6th harmonic exhibits the largest sensitivity for ultrasharp tips (tip radius below 10 nm) and polymers (Young's modulus below 20 GPa). © 2017 Gramazio et al.

  • Identifying the nature of surface chemical modification for directed self-assembly of block copolymers

    Evangelio L., Gramazio F., Lorenzoni M., Gorgoi M., Espinosa F.M., García R., Pérez-Murano F., Fraxedas J. Beilstein Journal of Nanotechnology; 8 (1, 198) 2017. 10.3762/bjnano.8.198. IF: 3.127

    In recent years, block copolymer lithography has emerged as a viable alternative technology for advanced lithography. In chemicalepitaxy- directed self-assembly, the interfacial energy between the substrate and each block copolymer domain plays a key role on the final ordering. Here, we focus on the experimental characterization of the chemical interactions that occur at the interface built between different chemical guiding patterns and the domains of the block copolymers. We have chosen hard X-ray high kinetic energy photoelectron spectroscopy as an exploration technique because it provides information on the electronic structure of buried interfaces. The outcome of the characterization sheds light onto key aspects of directed self-assembly: grafted brush layer, chemical pattern creation and brush/block co-polymer interface. © 2017 Evangelio et al.

  • In Situ Determination of the Water Condensation Mechanisms on Superhydrophobic and Superhydrophilic Titanium Dioxide Nanotubes

    Macias-Montero M., Lopez-Santos C., Filippin A.N., Rico V.J., Espinos J.P., Fraxedas J., Perez-Dieste V., Escudero C., Gonzalez-Elipe A.R., Borras A. Langmuir; 33 (26): 6449 - 6456. 2017. 10.1021/acs.langmuir.7b00156. IF: 3.833

    One-dimensional (1D) nanostructured surfaces based on high-density arrays of nanowires and nanotubes of photoactive titanium dioxide (TiO2) present a tunable wetting behavior from superhydrophobic to superhydrophilic states. These situations are depicted in a reversible way by simply irradiating with ultraviolet light (superhydrophobic to superhydrophilic) and storage in dark. In this article, we combine in situ environmental scanning electron microscopy (ESEM) and near ambient pressure photoemission analysis (NAPP) to understand this transition. These experiments reveal complementary information at microscopic and atomic level reflecting the surface wettability and chemical state modifications experienced by these 1D surfaces upon irradiation. We pay special attention to the role of the water condensation mechanisms and try to elucidate the relationship between apparent water contact angles of sessile drops under ambient conditions at the macroscale with the formation of droplets by water condensation at low temperature and increasing humidity on the nanotubes' surfaces. Thus, for the as-grown nanotubes, we reveal a metastable and superhydrophobic Cassie state for sessile drops that tunes toward water dropwise condensation at the microscale compatible with a partial hydrophobic Wenzel state. For the UV-irradiated surfaces, a filmwise wetting behavior is observed for both condensed water and sessile droplets. NAPP analyses show a hydroxyl accumulation on the as-grown nanotubes surfaces during the exposure to water condensation conditions, whereas the water filmwise condensation on a previously hydroxyl enriched surface is proved for the superhydrophilic counterpart. © 2017 American Chemical Society.

  • Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001

    Moyano-Cambero C.E., Trigo-Rodríguez J.M., Benito M.I., Alonso-Azcárate J., Lee M.R., Mestres N., Martínez-Jiménez M., Martín-Torres F.J., Fraxedas J. Meteoritics and Planetary Science; 52 (6): 1030 - 1047. 2017. 10.1111/maps.12851. IF: 2.391

    Martian meteorites can provide valuable information about past environmental conditions on Mars. Allan Hills 84001 formed more than 4 Gyr ago, and owing to its age and long exposure to the Martian environment, and this meteorite has features that may record early processes. These features include a highly fractured texture, gases trapped during one or more impact events or during formation of the rock, and spherical Fe-Mg-Ca carbonates. In this study, we have concentrated on providing new insights into the context of these carbonates using a range of techniques to explore whether they record multiple precipitation and shock events. The petrographic features and compositional properties of these carbonates indicate that at least two pulses of Mg- and Fe-rich solutions saturated the rock. Those two generations of carbonates can be distinguished by a very sharp change in compositions, from being rich in Mg and poor in Fe and Mn, to being poor in Mg and rich in Fe and Mn. Between these two generations of carbonate is evidence for fracturing and local corrosion. © 2017 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals, Inc. on behalf of The Meteoritical Society.


  • Evaluating the compressive stress generated during fabrication of Si doubly clamped nanobeams with AFM

    Lorenzoni M., Llobet J., Gramazio F., Sansa M., Fraxedas J., Perez-Murano F. Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics; 34 (6, 06KK02) 2016. 10.1116/1.4967930. IF: 1.398

    In this work, the authors employed Peak Force tapping and force spectroscopy to evaluate the stress generated during the fabrication of doubly clamped, suspended silicon nanobeams with rectangular section. The silicon beams, released at the last step of fabrication, present a curved shape that suggests a bistable buckling behavior, typical for structures that retain a residual compressive stress. Both residual stress and Young's modulus were extracted from experimental data using two different methodologies: analysis of beam deflection profiles and tip-induced mechanical bending. The results from the two methods are compared, providing an insight into the possible limitations of both methods. © 2016 Author(s).

  • Multiscale study of mononuclear CoII SMMs based on curcuminoid ligands

    Díaz-Torres R., Menelaou M., Roubeau O., Sorrenti A., Brandariz-De-Pedro G., Sañudo E.C., Teat S.J., Fraxedas J., Ruiz E., Aliaga-Alcalde N. Chemical Science; 7 (4): 2793 - 2803. 2016. 10.1039/c5sc03298a. IF: 9.144

    This work introduces a novel family of CoII species having a curcuminoid (CCMoid) ligand, 9Accm, attached, namely [Co(9Accm)2(py)2] (1) and [Co(9Accm)2(2,2′-bpy)] (2), achieved in high yields by the use of a microwave reactor, and exhibiting two different arrangements for the 9Accm ligands, described as "cis"(2) and "trans"(1). The study of the similarities/differences of the magnetic, luminescent and surface behaviors of the two new species, 1 and 2, is the main objective of the present work. The determined single-crystal structures of both compounds are the only CoII-CCMoid structures described in the literature so far. Both compounds exhibit large positive D values, that of 1 (D = +74 cm-1) being three times larger than that of 2 (D = +24 cm-1), and behave as mononuclear Single-Molecule Magnets (SMMs) in the presence of an external magnetic field. Their similar structures but different anisotropy and SMM characteristics provide, for the first time, deep insight on the spin-orbital effects thanks to the use of CASSCF/NEVPT2 calculations implementing such contributions. Further magnetic studies were performed in solution by means of paramagnetic 1H NMR, where both compounds (1 and 2) are stable in CDCl3 and display high symmetry. Paramagnetic NMR appears to be a useful diagnostic tool for the identification of such molecules in solution, where the resonance values found for the methine group (-CH-) of 9Accm vary significantly depending on the cis or trans disposition of the ligands. Fluorescence studies show that both systems display chelation enhancement of quenching (CHEQ) with regard to the free ligand, while 1 and 2 display similar quantum yields. Deposition of 1-2 on HOPG and Si(100) surfaces using spin-coating was studied using AFM; UV photoemission experiments under the same conditions display 2 as the most robust system. The measured occupied density of states of 2 with UV photoemission is in excellent agreement with theoretical DFT calculations. © The Royal Society of Chemistry 2016.

  • Synthesis, characterization, and thermoelectric properties of superconducting (BEDT-TTF)2I3 nanoparticles

    Chtioui-Gay I., Faulmann C., De Caro D., Jacob K., Valade L., De Caro P., Fraxedas J., Ballesteros B., Steven E., Choi E.S., Lee M., Benjamin S.M., Yvenou E., Simonato J.-P., Carella A. Journal of Materials Chemistry C; 4 (31): 7449 - 7454. 2016. 10.1039/c6tc01378c. IF: 5.066

    The synthesis of (BEDT-TTF)2I3 in the presence of two neutral amphiphilic molecules [N-octylfurfurylimine and 1-octanamine, N-(2-thienylmethylene)] leads to single and aggregated nanoparticles of 2 to 6 nm size. The samples contain highly crystalline nanoparticles of the βCO-(BEDT-TTF)2I3 phase, confirmed by XRD. Temperature dependent resistance and magnetic susceptibility studies evidence the superconducting transition characteristics of the βCO-(BEDT-TTF)2I3 phase. The I-V curve of a single nanoparticle aggregate, measured using AFM, exhibits an expected semiconductor-like behaviour. Thermoelectric studies led to a ZT of 1.47 × 10-3 at 300 K. © The Royal Society of Chemistry 2016.


  • Continuous monitoring of tip radius during atomic force microscopy imaging

    Fraxedas J., Pérez-Murano F., Gramazio F., Lorenzoni M., Rull Trinidad E., Staufer U. Proceedings of SPIE - The International Society for Optical Engineering; 9636 ( 96360O) 2015. 10.1117/12.2196951. IF: 0.000

    We present a continuous tip monitoring method during atomic force microscopy imaging based on the use of higher harmonics, which are generated in the repulsive regime as a result of the nonlinear interactions between the cantilever tip and the surface under study. We have applied this method to commercial rectangular microfabricated silicon cantilevers with force constants in the 45 N/m range and fundamental frequencies in the 300-400 kHz range and with tip radii below 10 nm. We have focused in the resonance of the 2nd flexural mode and the 6th harmonic using polystyrene surfaces. The simultaneous acquisition of topographic and higher harmonic images allows a continuous control of the state of the tip. The experimental results have been rationalized with computer simulations taking into account both the cantilever dynamics and the tip-surface interactions. © 2015 SPIE.

  • Creation of guiding patterns for directed self-assembly of block copolymers by resistless direct e-beam exposure

    Evangelio L., Fernandez-Regulez M., Borrise X., Lorenzoni M., Fraxedas J., Perez-Murano F. Proceedings of SPIE - The International Society for Optical Engineering; 9423 (942326) 2015. 10.1117/12.2085830. IF: 0.000

    We present a novel approach for the creation of guiding patterns to direct the self-assembly of block copolymers. A neutral layer of a brush polymer is directly exposed by electrons, causing the cross-linking of the brush molecules, and thus changing its local affinity. The advantage relies on the achievable resolution and the reduction of the process steps in comparison with deep UV and conventional electron beam lithography, since it avoids the use of a resist. We envision that this method will be highly valuable for the investigation of novel high-chi DSA materials and complex guiding pattern designs, where pattern placement and resolution is becoming critical. © 2015 SPIE.

  • Creation of guiding patterns for directed self-assembly of block copolymers by resistless direct e-beam exposure

    Evangelio L., Fernández-Regúlez M., Borrisé X., Lorenzoni M., Fraxedas J., Pérez-Murano F. Journal of Micro/ Nanolithography, MEMS, and MOEMS; 14 (3, 033511) 2015. 10.1117/1.JMM.14.3.033511. IF: 1.428

    We present an approach for the creation of guiding patterns to direct the self-assembly of block copolymers. A neutral layer of a brush polymer is directly exposed by electrons, causing the cross-linking of the brush molecules, and thus changing its local affinity. The advantage relies on the achievable resolution and the reduction of the process steps in comparison with deep UV and conventional electron beam lithography, since it avoids the use of a resist. We envision that this method will be highly valuable for the investigation of high-chi directed self-assembly materials and complex guiding pattern designs, where pattern placement and resolution are becoming critical. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).

  • Spin density wave and superconducting properties of nanoparticle organic conductor assemblies

    Winter L.E., Steven E., Brooks J.S., Benjamin S., Park J.-H., De Caro D., Faulmann C., Valade L., Jacob K., Chtioui I., Ballesteros B., Fraxedas J. Physical Review B - Condensed Matter and Materials Physics; 91 (3, 035437) 2015. 10.1103/PhysRevB.91.035437. IF: 3.736

    The magnetic susceptibilities of nanoparticle assemblies of two Bechgaard salts (TMTSF)2PF6 and (TMTSF)2ClO4, have been studied vs temperature and magnetic field. In the bulk these materials exhibit a spin density wave formation (TSDW=12K) and superconductivity (Tc=1.2K), respectively. We show from inductive (susceptibility) measurements that the nanoparticle assemblies exhibit ground-state phase transitions similar to those of randomly oriented polycrystalline samples of the parent materials. Resistivity and diamagnetic shielding measurements yield additional information on the functional nanoparticle structure in terms of stoichiometric and nonstoichiometric composition. © 2015 American Physical Society.


  • Four Molecular Superconductors Isolated as Nanoparticles

    de Caro, D; Faulmann, C; Valade, L; Jacob, K; Chtioui, I; Foulal, S; de Caro, P; Bergez-Lacoste, M; Fraxedas, J; Ballesteros, B; Brooks, J.S.; Steven, E; Winter, L.E. European Journal of Inorganic Chemistry; 2014 (24): 4010 - 4016. 2014. 10.1002/ejic.201402007. IF: 2.965

  • Hydrophobic coating of mica by stearic acid vapor deposition

    Sauthier, G.; Segura, J.J.; Fraxedas, J.; Verdaguer, A. Colloids and Surfaces A: Physicochemical and Engineering Aspects; 443: 331 - 337. 2014. 10.1016/j.colsurfa.2013.11.031. IF: 2.354

  • Influence of the relative molecular orientation on interfacial charge-transfer Excitons at donor/acceptor Nanoscale heterojunctions

    Aghamohammadi, M.; Fernández, A.; Schmidt, M.; Pérez-Rodríguez, A.; Goñi, A.R.; Fraxedas, J.; Sauthier, G.; Paradinas, M.; Ocal, C.; Barrena, E. Journal of Physical Chemistry C; 118 (27): 14833 - 14839. 2014. 10.1021/jp5041579. IF: 4.835

  • Sub-10 nm resistless nanolithography for directed self-Assembly of block copolymers

    Fernández-Regúlez, M.; Evangelio, L.; Lorenzoni, M.; Fraxedas, J.; Pérez-Murano, F. ACS Applied Materials and Interfaces; 6 (23): 21596 - 21602. 2014. 10.1021/am506600m. IF: 5.900

  • Water adsorption on etched hydrophobic surfaces of L-, D- and DL-valine crystals

    Segura, J.J.; Verdaguer, A.; Fraxedas, J. Surface Science; 621: 191 - 196. 2014. 10.1016/j.susc.2013.11.008. IF: 1.870


  • Aqueous Alteration vs. Shock in Villalbeto de la Pena Polymict Chondritic Breccia

    Trigo-Rodriguez, J. M.; Moyano-Cambero, C. E.; Martinez-Jimenez, M.; Fraxedas, J.; Alonso-Azcarate, J. Meteoritics and Planetary Science; 48: a349. 2013. . IF: 2.800

  • Colloidal solutions of organic conductive nanoparticles

    De Caro, D.; Souque, M.; Faulmann, C.; Coppel, Y.; Valade, L.; Fraxedas, J.; Vendier, O.; Courtade, F. Langmuir : the ACS journal of surfaces and colloids; 29: 8983 - 8988. 2013. 10.1021/la401371c. IF: 4.187

  • Communication: Growing room temperature ice with graphene

    Verdaguer, A.; Segura, J.J.; López-Mir, L.; Sauthier, G.; Fraxedas, J. Journal of Chemical Physics; 138 2013. 10.1063/1.4798941. IF: 3.164

  • Nanoparticles of molecule-based conductors

    De Caro, D.; Valade, L.; Faulmann, C.; Jacob, K.; Van Dorsselaer, D.; Chtioui, I.; Salmon, L.; Sabbar, A.; El Hajjaji, S.; Pérez, E.; Franceschi, S.; Fraxedas, J. New Journal of Chemistry; 37: 3331 - 3336. 2013. 10.1039/c3nj00555k. IF: 2.966

  • Surface screening of written ferroelectric domains in ambient conditions

    Segura, J.J.; Domingo, N.; Fraxedas, J.; Verdaguer, A. Journal of Applied Physics; 113 2013. 10.1063/1.4801983. IF: 2.210


  • Iridium oxohydroxide, a significant member in the family of iridium oxides. Stoichiometry, characterization, and implications in bioelectrodes

    Cruz, A.M.; Abad, L.; Carretero, N.M.; Moral-Vico, J.; Fraxedas, J.; Lozano, P.; Subías, G.; Padial, V.; Carballo, M.; Collazos-Castro, J.E.; Casañ-Pastor, N. Journal of Physical Chemistry C; 116: 5155 - 5168. 2012. 10.1021/jp212275q.

  • Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts

    Jorge, A.B.; Sakatani, Y.; Boissière, C.; Laberty-Roberts, C.; Sauthier, G.; Fraxedas, J.; Sanchez, C.; Fuertes, A. Journal of Materials Chemistry; 22: 3220 - 3226. 2012. 10.1039/c2jm15230d.

  • Water-mediated height artifacts in dynamic atomic force microscopy

    Verdaguer, A.; Santos, S.; Sauthier, G. ; Segura, J.J.; Chiesa, M. ; Fraxedas, J. Physical Chemistry Chemical Physics; 14: 16080. 2012. 10.1039/c2cp43031b.


  • Defect-induced wetting on BaF2(111) and CaF2(111) at ambient conditions

    Cardellach, M.; Verdaguer, A.; Fraxedas, J. Surface Science; 605: 1929 - 1933. 2011. 10.1016/j.susc.2011.07.003.

  • Dipolar origin of water etching of amino acid surfaces.

    Segura, J. J.; Verdaguer, A.; Sacha, G. M.; Fraxedas, J. Physical Chemistry Chemical Physics; 13: 21446 - 21450. 2011. .

  • Modulation of surface charge transfer through competing long-range repulsive versus short-range attractive interactions

    Fraxedas J., García-Gil S., Monturet S., Lorente N., Fernández-Torrente I., Franke K.J., Pascual J.I., Vollmer A., Blum R.-P., Koch N., Ordejón P. Journal of Physical Chemistry C; 115 (38): 18640 - 18648. 2011. 10.1021/jp2050838.

    We report a combined experimental and theoretical study of the modulation of surface charge transfer on the tetrathiafulvalene (TTF)/Au(111) interface as a function of coverage in the submonolayer regime by combining low-temperature scanning tunneling microscopy, high-resolution photoemission spectroscopy using synchrotron radiation, and density functional theory (DFT) calculations. The modulation is induced by the competition between long-range repulsive Coulombic interactions and short-range attractive hydrogen-bonding interactions. The system shows the characteristic pattern evolution, from monomeric stripes at low coverages to two-dimensional islands, with the formation of labyrinths in the crossover. © 2011 American Chemical Society.

  • Nanoparticles of organic conductors: synthesis and application as electrode material in Organic Field Effect Transistors.

    de Caro, D. ; Jacob, K. ; Hahioui, H. ; Faulmann, C. ; Valade, L. ; Kadoya, T.; Mori, T. ; Fraxedas, J. ; Viaue, L. New Journal of Chemistry; 35: 1315 - 1319. 2011. .

  • Strong water-mediated friction asymmetry and surface dynamics of zwitterionic solids at ambient conditions: L-alanine as a case study

    Segura, J.J.; Verdaguer, A.; Garzn, L.; Barrena, E.; Ocal, C.; Fraxedas, J. Journal of Chemical Physics; 134 2011. 10.1063/1.3571453.

  • Tetrathia- and tetraselenafulvalene adsorbed on Ag(110): A theoretical study

    Martorell, B.; Fraxedas, J.; Clotet, A. Surface Science; 605: 187 - 192. 2011. 10.1016/j.susc.2010.10.018.


  • A first principle study of the structural, vibrational and electronic properties of tetrathiafulvalene adsorbed on Ag(110) and Au(110) surfaces

    Martorell, B.; Clotet, A.; Fraxedas, J. Journal of Computational Chemistry; 31: 1842 - 1852. 2010. 10.1002/jcc.21465.

  • Evidence of anion-ordering in (TMTSF)2ClO4 electrodeposited on silicon wafers

    Savy, J.-P.; de Caro, D.; Valade, L.; Coiffic, J.-C.; Choi, E.S.; Brooks, J.S.; Fraxedas, J. Synthetic Metals; 160: 855 - 858. 2010. 10.1016/j.synthmet.2010.01.034.

  • High conductivity in hydrothermally grown AgCuO2 single crystals verified using focused-ion-beam-deposited nanocontacts

    Muñoz-Rojas, D.; Córdoba, R.; Fernández-Pacheco, A.; De Teresa, J.M.; Sauthier, G.; Fraxedas, J.; Walton, R.I.; Casañ-Pastor, N. Inorganic Chemistry; 49: 10977 - 10983. 2010. 10.1021/ic101420c.

  • Ionic liquid-stabilized nanoparticles of charge transfer-based conductors

    de Caro, D.; Jacob, K.; Faulmann, C.; Legros, J.-P.; Senocq, F.; Fraxedas, J.; Valade, L. Synthetic Metals; 160: 1223 - 1227. 2010. 10.1016/j.synthmet.2010.03.013.

  • Orbital specific chirality and homochiral self-assembly of achiral molecules induced by charge transfer and spontaneous symmetry breaking

    Mugarza A., Lorente N., Ordejón P., Krull C., Stepanow S., Bocquet M.-L., Fraxedas J., Ceballos G., Gambardella P. Physical Review Letters; 105 (11, 115702) 2010. 10.1103/PhysRevLett.105.115702.

    We study the electronic mechanisms underlying the induction and propagation of chirality in achiral molecules deposited on surfaces. Combined scanning tunneling microscopy and ab initio electronic structure calculations of Cu-phthalocyanines adsorbed on Ag(100) reveal the formation of chiral molecular orbitals in structurally undistorted molecules. This effect shows that chirality can be manifest exclusively at the electronic level due to asymmetric charge transfer between molecules and substrate. Single molecule chirality correlates with attractive van der Waals interactions, leading to the propagation of chirality at the supramolecular level. Ostwald ripening provides an efficient pathway for complete symmetry breaking and self-assembly of homochiral supramolecular layers. © 2010 The American Physical Society.

  • Two-dimensional wetting: The role of atomic steps on the nucleation of thin water films on BaF2 (111) at ambient conditions

    Cardellach, M.; Verdaguer, A.; Santiso, J.; Fraxedas, J. Journal of Chemical Physics; 132 2010. 10.1063/1.3456698.


  • Amphiphillic organic crystals

    Segura, J.J.; Verdaguer, A.; Cobián, M.; Hernández, E.R.; Fraxedas, J. Journal of the American Chemical Society; 131: 17853 - 17859. 2009. 10.1021/ja905961h.

  • Charging and discharging of graphene in ambient conditions studied with scanning probe microscopy

    Verdaguer, A.; Cardellach, M.; Segura, J.J.; Sacha, G.M.; Moser, J.; Zdrojek, M.; Bachtold, A.; Fraxedas, J. Applied Physics Letters; 94 2009. 10.1063/1.3149770.

  • Influence of the macroscopic shape of the tip on the contrast in scanning polarization force microscopy images

    Sacha, G.M.; Cardellach, M.; Segura, J.J.; Moser, J.; Bachtold, A.; Fraxedas, J.; Verdaguer, A. Nanotechnology; 20 2009. 10.1088/0957-4484/20/28/285704.

  • Neural cell growth on TiO2 anatase nanostructured surfaces

    Collazos-Castro, J.E.; Cruz, A.M.; Carballo-Vila, M.; Lira-Cantú, M.; Abad, L.; del Pino, Á.P.; Fraxedas, J.; San Juan, A.; Fonseca, C.; Pêgo, A.P.; Casañ-Pastor, N. Thin Solid Films; 518: 160 - 170. 2009. 10.1016/j.tsf.2009.06.048.


  • Correlation between charge state of insulating NaCl surfaces and ionic mobility induced by water adsorption: A combined ambient pressure X-ray photoelectron spectroscopy and scanning force microscopy study

    Verdaguer, A.; Segura, J.J.; Fraxedas, J.; Bluhm, H.; Salmeron, M. Journal of Physical Chemistry C; 112: 16898 - 16901. 2008. 10.1021/jp805444v.

  • Full-wafer fabrication by nanostencil lithography of micro/nanomechanical mass sensors monolithically integrated with CMOS

    Arcamone, J.; Van Den Boogaart, M.A.F.; Serra-Graells, F.; Fraxedas, J.; Brugger, J.; Pérez-Murano, F. Nanotechnology; 19 2008. 10.1088/0957-4484/19/30/305302.

  • In situ nanocalorimetry of thin glassy organic films

    León-Gutierrez, E.; Garcia, G.; Lopeandía, A.F.; Fraxedas, J.; Clavaguera-Mora, M.T.; Rodríguez-Viejo, J. Journal of Chemical Physics; 129 2008. 10.1063/1.3009766.

  • Nitrogen doping of ceria

    Jorge, A.B.; Fraxedas, J.; Cantarero, A.; Williams, A.J.; Rodgers, J.; Attfield, J.P.; Fuertes, A. Chemistry of Materials; 20: 1682 - 1684. 2008. 10.1021/cm7028678.

  • Special issue on thin films of molecular organic materials

    J. Fraxedas Journal of Physics Condensed Matter; 20: 180301. 2008. .

  • Thin water films grown at ambient conditions on BaF2 (111) studied by scanning polarization force microscopy

    Verdaguer, A.; Cardellach, M.; Fraxedas, J. Journal of Chemical Physics; 129 2008. 10.1063/1.3006098.

  • Water on surfaces studied by Scanning Probe Microscopies

    A.Verdaguer; A. Mugarza; J. Fraxedas Contributions to Science; 4: 141 - 155. 2008. .


  • Characterization of the anion-ordering transition in (TMTTF) 2 ReO4 by x-ray absorption and photoemission spectroscopies

    Subías, G.; Abbaz, T.; Fabre, J.M.; Fraxedas, J. Physical Review B - Condensed Matter and Materials Physics; 76 2007. 10.1103/PhysRevB.76.085103.

  • Growth and characterization of molecular organic crystals and films

    J. Fraxedas Journal of Optoelectronics and Advanced Materials; 9: 1322 - 1328. 2007. .

  • Long-range repulsive interaction between molecules on a metal surface induced by charge transfer

    Fernandez-Torrente, I.; Monturet, S.; Franke, K.J.; Fraxedas, J.; Lorente, N.; Pascual, J.I. Physical Review Letters; 99 2007. 10.1103/PhysRevLett.99.176103.

  • Monolithic mass sensor fabricated using a conventional technology with attogram resolution in air conditions

    J. Verd; A. Uranga; G. Abadal; J. Teva; F. Torres; F. Pérez-Murano; J. Fraxedas; J. Esteve; N. Barniol Applied Physics Letters; 2007. .

  • Nanowires of molecule-based charge-transfer salts

    J.-P. Savy; D. de Caro; Ch. Faulmann; L. Valade; M. Almeida; T. Koike; H. Fujiwara; T. Sugimoto; J. Fraxedas; T. Ondarçuhu; C. Pasquier New Journal of Chemistry; 2007. .


  • An approach to the origin of transport properties in a series of molecular conductors, based on XPS and spectroscopic studies

    L. Valade; D. de Caro; J-P. Savy; I. Malfant; C. Faulmann; M. Almeida; J. Fraxedas; J. S. Brooks Journal of Low Temperature Physics; 142: 141 - 146. 2006. .

  • Measuring energies at the nanometer-scale of molecular organic materials with an Atomic Force Microscope: TTF-TCNQ as a case study

    J. Fraxedas; J. Langer; I. Díez; F. Sanz Journal of Low Temperature Physics; 142: 121 - 126. 2006. .

  • Monoclinic polymorphs of the Bechgaard-Fabre salts

    J. Fraxedas; S. Perruchas; E. Canadell; P. Auban-Senzie; P. Batail Journal of Low Temperature Physics; 142: 397 - 400. 2006. .

  • Thin films of molecular materials grown on silicon substrates by chemical vapor deposition and electrodeposition

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