His research focuses on the study of colloidal aggregation processes by means of optical and simulation techniques with a strong emphasis on the development of theoretical models for the kinetics of aggregate formation in electrostatic heteroaggregation processes and aggregation of superparamagnetic particles. He is coauthor of numerous publications in national and international journals, book chapters and contributions to conferences and scientific meetings. He has co-directed several doctoral theses and participated in organizing national and international conferences.
From 2008 to 2019, he served as Director for International Strategy, Networks and Projects at the Vice-Rectorate for Internationalization He is currently the representative of the University of Granada at the Education Board of the European Alliance of Universities Arqus ( where he serves as vice-chair. At the local level he is regional advisor for Brazil, Bolivia, Chile, Paraguay and Uruguay
EDUCATION
Master of Science (State University of New York at Albany, USA),
Bachelor of Physics (Diplom-Physiker, Julius-Maximilians-Universität Würzburg, Germany),
PhD with Honours in Physics (Doctor en Ciencias Físicas con premio extraordinario de doctorado, Universidad de Granada, Spain).
RESEARCH, TEACHING, or OTHER INTERESTS
Statistical and Nonlinear Physics, Statistical and Nonlinear Physics, Surfaces and Interfaces
57
Scopus Publications
1906
Scholar Citations
22
Scholar h-index
35
Scholar i10-index
Scopus Publications
Experimental techniques used for the characterization of soft nanoparticles Rsc Nanoscience and Nanotechnology, 2014
Multiple time scales and cluster formation mechanisms in charge-heteroaggregation processes J. M. López-López, A. Moncho-Jordá, A. M. Puertas, A. Schmitt, R. Hidalgo-Álvarez Soft Matter, 2010 We report simulation and experimental evidence of multiple cluster-formation mechanisms arising in coagulation in a binary mixture composed of oppositely charged colloids with large asymmetry in the relative particle concentration. These mechanisms can be clearly distinguished from one another as they cause the appearance of several maxima in the cluster-size distribution curves at well-separated time scales. We show that this behavior is caused by the fact that clusters of a given size can have different internal compositions. Moreover, the peaks collapse into a single maximum when electrostatic interactions are screened, which is a confirmation that this effect is very sensitive to the strength and range of the interparticle electrostatic interactions. The experimental confirmation of the simulation results represents the first evidence of non bell-shaped cluster-size distribution curves.
Primary and secondary bonds in field induced aggregation of electric double layered magnetic particles F. Martínez-Pedrero, M. Tirado-Miranda, A. Schmitt, J. Callejas-Fernández Langmuir, 2009 Magnetic filaments able to survive on removal of the magnetic field have led to new applications in biotechnology and microfluidics. In this work, the stability of linear field induced aggregates composed of electric double layered magnetic particles has been studied in the framework of the DLVO theory. A suitable system of differential equations is proposed in order to determine how the percentage of bonds formed in a primary or a secondary energy minimum depends on the exposure time to the magnetic field. The theoretical predictions were compared with experimental data obtained by means of dynamic light scattering. The aggregation experiments were performed at different electrolyte concentrations and exposure times to the magnetic field. Fitting the experimental results according to the proposed theory allowed us to determine the rate at which bonds formed in a secondary energy minimum turn into stable bonds.
Fractal structures and aggregation kinetics of protein-functionalized colloidal particles R. Hidalgo-Álvarez Structure and Functional Properties of Colloidal Systems, 2009 THEORY Colloid Dynamics and Transitions to Dynamically Arrested States, R. Juarez-Maldonado and M. Medina-Noyola Capillary Forces between Colloidal Particles at Fluid Interfaces, Alvaro Dominguez STRUCTURE Ionic Structures in Colloidal Electric Double Layers: Ion Size Correlations, A. Martin-Molina, M. Quesada-Perez, and R. Hidalgo-Alvarez Effective Interactions of Charged Vesicles in Aqueous Suspensions, C. Haro-Perez, L.F. Rojas-Ochoa, V. Trappe, R. Castaneda-Priego, J. Estelrich, M. Quesada-Perez, Jose Callejas-Fernandez, and R. Hidalgo-Alvarez Structure and Colloidal Properties of Extremely Bimodal Suspensions, A.V. Delgado, M.L. Jimenez, J.L. Viota, R. Rica, M.T. Lopez-Lopez, and S. Ahualli Structure and Stability of Filaments Made up of Microsized Magnetic Particles, F. Martinez-Pedrero , A. El-Harrak, Maria Tirado-Miranda, J. Baudry, Artur Schmitt, J. Bibette, and Jose Callejas-Fernandez Glasses in Colloidal Systems: Attractive Interactions and Gelation, Antonio M. Puertas and Matthias Fuchs Phase Behavior and Structure of Colloidal Suspensions in Bulk, Confinement, and External Fields, A.-P. Hynninen, A. Fortini, and M. Dijkstra Water-Water Interfaces, R. Hans Tromp Interfacial Phenomena Underlying the Behavior of Foams and Emulsions, Julia Maldonado-Valderrama, Antonio Martin-Rodriguez, Miguel A. Cabrerizo-Vilchez, and Maria Jose Galvez Ruiz Rheological Models for Structured Fluids, Juan de Vicente FUNCTIONAL MATERIALS Surface Functionalization of Latex Particles, Ainara Imaz, Jose Ramos, and Jacqueline Forcada Fractal Structures and Aggregation Kinetics of Protein-Functionalized Colloidal Particles, Maria Tirado-Miranda, Miguel A. Rodriguez-Valverde, Artur Schmitt, Jose Callejas-Fernandez, and Antonio Fernandez-Barbero Advances in the Preparation and Biomedical Applications of the Magnetic Colloids, A. Elaissari, J. Chatterjee, M. Hamoudeh, and H. Fessi Colloidal Dispersion of Metallic Nanoparticles: Formation and Functional Properties, Shlomo Magdassi, Michael Grouchko, and Alexander Kamyshny Hydrophilic Colloidal Networks (Micro- and Nanogels) in Drug Delivery and Diagnostics, Serguei V. Vinogradov Responsive Microgels for Drug Delivery Applications, Jeremy P.K. Tan and Kam C. Tam Colloidal Photonic Crystals and the Laser Applications, Seiichi Furumi Droplet-Based Microfluidics: Picoliter-Sized Reactors for Mesoporous Microparticle Synthesis, Nick J. Carroll, Sergio Mendez, Jeremy S. Edwards, David A. Weitz, and Dimiter N. Petsev Electro-Optical Properties of Gel-Glass Dispersed Liquid Crystals Devices by Chemical Modification of the LC/Matrix Interface, Marcos Zayat, Rosario Pardo, and David Levy Nano-Emulsion Formation by Low-Energy Methods and Functional Properties, Conxita Solans, Isabel Sole, Alejandro Fernandez-Arteaga, Jordi Nolla, Nuria Azemar, Jose Gutierrez, Alicia Maestro, Carmen Gonzalez, and Carmen M. Pey Index
Structure and stability of filaments made up of microsized magnetic particles R. Hidalgo-Álvarez Structure and Functional Properties of Colloidal Systems, 2009 THEORY Colloid Dynamics and Transitions to Dynamically Arrested States, R. Juarez-Maldonado and M. Medina-Noyola Capillary Forces between Colloidal Particles at Fluid Interfaces, Alvaro Dominguez STRUCTURE Ionic Structures in Colloidal Electric Double Layers: Ion Size Correlations, A. Martin-Molina, M. Quesada-Perez, and R. Hidalgo-Alvarez Effective Interactions of Charged Vesicles in Aqueous Suspensions, C. Haro-Perez, L.F. Rojas-Ochoa, V. Trappe, R. Castaneda-Priego, J. Estelrich, M. Quesada-Perez, Jose Callejas-Fernandez, and R. Hidalgo-Alvarez Structure and Colloidal Properties of Extremely Bimodal Suspensions, A.V. Delgado, M.L. Jimenez, J.L. Viota, R. Rica, M.T. Lopez-Lopez, and S. Ahualli Structure and Stability of Filaments Made up of Microsized Magnetic Particles, F. Martinez-Pedrero , A. El-Harrak, Maria Tirado-Miranda, J. Baudry, Artur Schmitt, J. Bibette, and Jose Callejas-Fernandez Glasses in Colloidal Systems: Attractive Interactions and Gelation, Antonio M. Puertas and Matthias Fuchs Phase Behavior and Structure of Colloidal Suspensions in Bulk, Confinement, and External Fields, A.-P. Hynninen, A. Fortini, and M. Dijkstra Water-Water Interfaces, R. Hans Tromp Interfacial Phenomena Underlying the Behavior of Foams and Emulsions, Julia Maldonado-Valderrama, Antonio Martin-Rodriguez, Miguel A. Cabrerizo-Vilchez, and Maria Jose Galvez Ruiz Rheological Models for Structured Fluids, Juan de Vicente FUNCTIONAL MATERIALS Surface Functionalization of Latex Particles, Ainara Imaz, Jose Ramos, and Jacqueline Forcada Fractal Structures and Aggregation Kinetics of Protein-Functionalized Colloidal Particles, Maria Tirado-Miranda, Miguel A. Rodriguez-Valverde, Artur Schmitt, Jose Callejas-Fernandez, and Antonio Fernandez-Barbero Advances in the Preparation and Biomedical Applications of the Magnetic Colloids, A. Elaissari, J. Chatterjee, M. Hamoudeh, and H. Fessi Colloidal Dispersion of Metallic Nanoparticles: Formation and Functional Properties, Shlomo Magdassi, Michael Grouchko, and Alexander Kamyshny Hydrophilic Colloidal Networks (Micro- and Nanogels) in Drug Delivery and Diagnostics, Serguei V. Vinogradov Responsive Microgels for Drug Delivery Applications, Jeremy P.K. Tan and Kam C. Tam Colloidal Photonic Crystals and the Laser Applications, Seiichi Furumi Droplet-Based Microfluidics: Picoliter-Sized Reactors for Mesoporous Microparticle Synthesis, Nick J. Carroll, Sergio Mendez, Jeremy S. Edwards, David A. Weitz, and Dimiter N. Petsev Electro-Optical Properties of Gel-Glass Dispersed Liquid Crystals Devices by Chemical Modification of the LC/Matrix Interface, Marcos Zayat, Rosario Pardo, and David Levy Nano-Emulsion Formation by Low-Energy Methods and Functional Properties, Conxita Solans, Isabel Sole, Alejandro Fernandez-Arteaga, Jordi Nolla, Nuria Azemar, Jose Gutierrez, Alicia Maestro, Carmen Gonzalez, and Carmen M. Pey Index
Kinetic study of coupled field-induced aggregation and sedimentation processes arising in magnetic fluids F. Martínez-Pedrero, A. El-Harrak, J. C. Fernández-Toledano, M. Tirado-Miranda, J. Baudry, et al. Physical Review E Statistical Nonlinear and Soft Matter Physics, 2008 In this work, the kinetics of coupled aggregation and sedimentation processes arising in magnetic fluids has been studied. Aggregation was induced applying a constant uniaxial magnetic field. The time evolution of the cluster-size distribution and the weight-average chain length was monitored using optical microscopy and digital image analysis. The experimental results are compared with the corresponding solutions of Smoluchowski's equation. For this purpose, a recently proposed aggregation kernel was employed. When sedimentation effects are taken into account, the fits improve especially at long aggregation times.
Formation of magnetic filaments: A kinetic study F. Martínez-Pedrero, M. Tirado-Miranda, A. Schmitt, J. Callejas-Fernández Physical Review E Statistical Nonlinear and Soft Matter Physics, 2007 In order to form magnetic filaments or chains, aqueous suspensions of superparamagnetic colloidal particles were aggregated under the action of an external magnetic field in the presence of different amounts of an indifferent 1:1 electrolyte (KBr). This allowed the influence of the anisotropic magnetic and isotropic electrostatic interactions on the aggregation behavior of these electric double-layered magnetic particles to be studied. Dynamic light scattering was used for monitoring the average diffusion coefficient of the magnetic filaments formed. Hydrodynamic equations were employed for obtaining the average chain lengths from the experimental mean diffusion coefficients. The results show that, for the same exposure time to the magnetic field, the average filament size is monotonously related to the amount of electrolyte added. The chain growth behavior was found to follow a power law with a similar exponent for all electrolyte concentrations used in this work. The time evolution of the average filament size can be rescaled such that all the curves collapse on a single master curve. Since the electrolyte added does not have any effect on the scaling behavior, the mechanism of aggregation seems to be completely controlled by the dipolar interaction. However, electrolyte addition not only controls the range of the total interaction between the particles, but also enhances the growth rate of the aggregation process. Taking into account the anisotropic character of these aggregation processes we propose a kernel that depends explicitly on the range of the dipolar interaction. The corresponding solutions of the Smoluchowski equation combined with theoretical models for the diffusion and light scattering by rigid rods reproduce the measured time evolution of the average perpendicular aggregate diffusion coefficient quite satisfactorily.
Cluster discrimination in electrostatic heteroaggregation processes Physical Review E Statistical Nonlinear and Soft Matter Physics, 2004
Erratum: Constant bond breakup probability model for reversible aggregation processes (Physical Review E (2002) 65 (031405) DOI: 10.1103/PhysRevE.68.069903) Physical Review E Statistical Nonlinear and Soft Matter Physics, 2003
Coupled aggregation and sedimentation processes: The sticking probability effect Physical Review E Statistical Nonlinear and Soft Matter Physics, 2003
Clustering under short-range finite interactions Physical Review E Statistical Nonlinear and Soft Matter Physics, 2003
Clustering under short-range finite interactions M. Tirado-Miranda, A. Schmitt, J. Callejas-Fernández, A. Fernández-Barbero Physical Review E Statistical Physics Plasmas Fluids and Related Interdisciplinary Topics, 2003
Dynamic scaling in surface-controlled colloidal aggregation Journal of Physics Condensed Matter, 2000
Multiple contact kernel for diffusionlike aggregation A. Schmitt, G. Odriozola, A. Moncho-Jordá, J. Callejas-Fernández, R. Martínez-García, et al. Physical Review E Statistical Physics Plasmas Fluids and Related Interdisciplinary Topics, 2000
Forces acting on particle-enhanced immunoassays J.A. Molina-Bolívar, F. Galisteo-Gonzalez, J.L. Ortega-Vinuesa, A. Schmitt, R. Hidalgo-Alvarez Journal of Biomaterials Science Polymer Edition, 1999
Measuring the fractal dimension of colloidal aggregates Anales De Fisica Spain, 1998
Experimental Techniques Used for the Characterization of Soft Nanoparticles M Tirado-Miranda, J Ramos, O Sanz, J Forcada, JL Ortega-Vinuesa, ... 2025
Experimental Techniques Used for the Characterization of Soft Nanoparticles J Callejas-Fernandez, J Ramos, O Sanz, J Forcada, JL Ortega-Vinuesa, ... 2014 Citations: 7
Cursos de nivel cero para las titulaciones de grado de la facultad de ciencias (PID 08-130) AIG López, JA Rodríguez, CA Rodríguez, JCC Piñar, CC Fernández, ... Innovación docente y buenas prácticas en la Universidad de Granada.: Vol. 2 … , 2013 2013
Cursos de nivel cero para las titulaciones de grado de la facultad de ciencias (PID 10-123) AIG López, FP Torres, JCC Piñar, JFG Lopera, PJ Martínez, ... Innovación docente y buenas prácticas en la Universidad de Granada.: Vol. 2 … , 2013 2013
Cursos de nivel cero para las titulaciones de primer ciclo de Ciencias AI Garcia Lopez, G Luzon Gonzalez, C Valencia Miron, ... Universidad de Girona , 2010 2010
Multiple time scales and cluster formation mechanisms in charge-heteroaggregation processes JM López-López, A Moncho-Jorda, AM Puertas, A Schmitt, ... Soft Matter 6 (15), 3568-3572 , 2010 2010 Citations: 4
Primary and secondary bonds in field induced aggregation of electric double layered magnetic particles F Martínez-Pedrero, M Tirado-Miranda, A Schmitt, J Callejas-Fernández Langmuir 25 (12), 6658-6664 , 2009 2009 Citations: 12
Electrostatic heteroaggregation regimes in colloidal suspensions JM López-López, A Schmitt, A Moncho-Jordá, R Hidalgo-Alvarez Advances in colloid and interface science 147, 186-204 , 2009 2009 Citations: 54
Colloidal heteroaggregation: a strategy to prepare composite materials JML López, A Schmitt, AM Jordá, RH Álvarez Modeling and simulation of new materials: Tenth Granada Lectures: Granada … , 2009 2009
Structure and stability of filaments made up of microsized magnetic particles F Martínez-Pedrero, A El-Harrak, M Tirado-Miranda, J Baudry, A Schmitt, ... Structure and Functional Properties of Colloidal Systems, 117-134 , 2009 2009 Citations: 2
Fractal structures and aggregation kinetics of protein-functionalized colloidal particles M Tirado-Miranda, MA Rodríguez-Valverde, A Schmitt, ... Structure and functional properties of colloidal systems. Taylor and Francis … , 2009 2009 Citations: 2
Colloidal heteroaggregation: a strategy to prepare composite materials JM López-López, A Schmitt, A Moncho-Jordá, R Hidalgo-Álvarez Modeling and Simulation of New Materials 1091, 282-282 , 2009 2009
Kinetic study of coupled field-induced aggregation and sedimentation processes arising in magnetic fluids F Martínez-Pedrero, A El-Harrak, JC Fernández-Toledano, ... Physical Review E—Statistical, Nonlinear, and Soft Matter Physics 78 (1 … , 2008 2008 Citations: 42
Controlling the magnetic filaments length by tuning the particle interactions F Martínez-Pedrero, M Tirado-Miranda, A Schmitt, J Callejas-Fernández Journal of colloid and interface science 318 (1), 23-28 , 2008 2008 Citations: 18
Experimental evidence of rearrangement in fractal clusters M Tirado-Miranda, A Schmitt, J Callejas-Fernández, ... Trends in Colloid and Interface Science XII, 110-113 , 2008 2008 Citations: 4
On the identification of bridging flocculation: An extended collision efficiency model A Schmitt, MA Cabrerizo-Vilchez, R Hidalgo-Álvarez, ... Trends in Colloid and Interface Science XII, 105-109 , 2008 2008 Citations: 8
Single cluster light scattering and photon correlation spectroscopy: Two powerful techniques for monitoring cluster aggregation A Fernández-Barbero, MA Cabrerizo-Vílchez, R Martínez-García, ... Optical Methods and Physics of Colloidal Dispersions, 141-143 , 2007 2007
Experimental study of fractal aggregation by static and dynamic light scattering M Tirado-Miranda, A Schmitt, J Callejas-Fernández, ... Optical Methods and Physics of Colloidal Dispersions, 138-140 , 2007 2007 Citations: 13
Experimental evidence regarding the influence of surface charge on the bridging flocculation mechanism A Schmitt, A Fernandez-Barbero, M Cabrerizo-Vilchez, R Hidalgo-Alvarez Optical Methods and Physics of Colloidal Dispersions, 144-147 , 2007 2007 Citations: 22
Structure and stability of aggregates formed by electrical double-layered magnetic particles F Martínez-Pedrero, M Tirado-Miranda, A Schmitt, F Vereda, ... Colloids and Surfaces A: Physicochemical and Engineering Aspects 306 (1-3 … , 2007 2007 Citations: 23
MOST CITED SCHOLAR PUBLICATIONS
Encyclopedia of surface and colloid science AT Hubbard CRC press , 2002 2002 Citations: 438
Measurement of absolute coagulation rate constants for colloidal particles: comparison of single and multiparticle light scattering techniques H Holthoff, A Schmitt, A Fernández-Barbero, M Borkovec, ... Journal of colloid and interface science 192 (2), 463-470 , 1997 1997 Citations: 143
Stability of binary colloids: kinetic and structural aspects of heteroaggregation processes JM Lopez-Lopez, A Schmitt, A Moncho-Jorda, R Hidalgo-Alvarez Soft Matter 2 (12), 1025-1042 , 2006 2006 Citations: 133
A probabilistic aggregation kernel for the computer-simulated transition from DLCA to RLCA G Odriozola, A Moncho-Jorda, A Schmitt, J Callejas-Fernández, ... EPL (Europhysics Letters) 53 (6), 797-803 , 2001 2001 Citations: 85
The aggregation behaviour of protein-coated particles: a light scattering study M Tirado-Miranda, A Schmitt, J Callejas-Fernandez, ... European Biophysics Journal 32 (2), 128-136 , 2003 2003 Citations: 68
A light scattering study of the transition region between diffusion-and reaction-limited cluster aggregation G Odriozola, M Tirado-Miranda, A Schmitt, FM López, ... Journal of colloid and interface science 240 (1), 90-96 , 2001 2001 Citations: 66
Constant bond breakup probability model for reversible aggregation processes G Odriozola, A Schmitt, A Moncho-Jorda, J Callejas-Fernandez, ... Physical Review E 65 (3), 031405 , 2002 2002 Citations: 63
Formation of magnetic filaments: A kinetic study F Martínez-Pedrero, M Tirado-Miranda, A Schmitt, J Callejas-Fernández Physical Review E—Statistical, Nonlinear, and Soft Matter Physics 76 (1 … , 2007 2007 Citations: 62
Multiple contact kernel for diffusionlike aggregation A Schmitt, G Odriozola, A Moncho-Jorda, J Callejas-Fernández, ... Physical Review E 62 (6), 8335 , 2000 2000 Citations: 59
Cluster-size distribution in colloidal aggregation monitored by single-cluster light scattering A Fernández-Barbero, A Schmitt, M Cabrerizo-Vílchez, R Martínez-García Physica A: Statistical Mechanics and its Applications 230 (1-2), 53-74 , 1996 1996 Citations: 57
Electrostatic heteroaggregation regimes in colloidal suspensions JM López-López, A Schmitt, A Moncho-Jordá, R Hidalgo-Alvarez Advances in colloid and interface science 147, 186-204 , 2009 2009 Citations: 54
Colloidal clusters with finite binding energies: Fractal structure and growth mechanism M Tirado-Miranda, A Schmitt, J Callejas-Fernández, ... Langmuir 15 (10), 3437-3444 , 1999 1999 Citations: 53
Dynamic scaling concepts applied to numerical solutions of Smoluchowski’s rate equation G Odriozola, A Schmitt, J Callejas-Fernández, R Martínez-Garcı́a, ... The Journal of chemical physics 111 (16), 7657-7667 , 1999 1999 Citations: 46
Forming chainlike filaments of magnetic colloids: the role of the relative strength of isotropic and anisotropic particle interactions F Martínez Pedrero, M Tirado Miranda, A Schmitt, J Callejas Fernández The Journal of chemical physics 125 (8) , 2006 2006 Citations: 43
Kinetic study of coupled field-induced aggregation and sedimentation processes arising in magnetic fluids F Martínez-Pedrero, A El-Harrak, JC Fernández-Toledano, ... Physical Review E—Statistical, Nonlinear, and Soft Matter Physics 78 (1 … , 2008 2008 Citations: 42
The DLCA-RLCA transition arising in 2D-aggregation: simulations and mean field theory A Moncho-Jordá, G Odriozola, F Martınez-López, A Schmitt, ... The European Physical Journal E 5 (4), 471-480 , 2001 2001 Citations: 40
Simulated reversible aggregation processes for different interparticle potentials: The cluster aging phenomenon G Odriozola, A Schmitt, J Callejas-Fernández, R Martinez-Garcia, ... The Journal of Physical Chemistry B 107 (10), 2180-2188 , 2003 2003 Citations: 31
Irreversible versus reversible aggregation: Mean field theory and experiments G Odriozola, R Leone, A Schmitt, J Callejas-Fernández, ... The Journal of chemical physics 121 (11), 5468-5481 , 2004 2004 Citations: 29
Aggregation of magnetic polystyrene particles: a light scattering study F Martínez-Pedrero, M Tirado-Miranda, A Schmitt, J Callejas-Fernández Colloids and Surfaces A: Physicochemical and Engineering Aspects 270, 317-322 , 2005 2005 Citations: 24
Coupled aggregation and sedimentation processes: Three-dimensional off-lattice simulations R Leone, G Odriozola, L Mussio, A Schmitt, R Hidalgo-Álvarez The European Physical Journal E 7 (2), 153-161 , 2002 2002 Citations: 24
