Khoury L.R., Nowitzke J., Shmilovich K., and Popa I., Study of Biomechanical Properties of Protein-Based Hydrogels Using Force-Clamp Rheometry, Macromolecules, 2018, 51 (4), 1441–1452.

Valle-Orero J., Tapia-Rojo R., Eckels E.C., Rivas-Pardo J.A., Popa I., and Fernandez J.M., Proteins Breaking Bad: A Free Energy Perspective, J. Phys. Chem. Lett.2017, 8, 3642–3647.

Valle-Orero J., Rivas-Pardo J. A., Tapia-Rojo R., Popa I., Echelman D.J., Haldar S., Fernandez J. M., Mechanical deformation accelerates protein ageing, Angew. Chem. Int. Ed.201756, 9741 –9746.

Valle-Orero J., Rivas-Pardo J. A., Popa I.,  Multidomain proteins under force, Nano-technology2017, 28 (17), 174003.

Popa, I., Rivas-Pardo J.A., Eckels E.C., Echelman D.J., Badilla C.L., Valle-Orero J., Fernandez J. M., A HaloTag Anchored Ruler for Week-Long Studies of Protein Dynamics, J. Am. Chem. Soc., 2016138 (33), 10546–10553.
Featured in JACS Spotlight “Getting the Long View on Protein Folding” by Erika Gebel Berg.

Rivas-Pardo J.A., Eckels E.C., Popa, I., Kosuri P., Linke W.A., Fernandez J. M., Work Done by Titin Protein Folding Assists Muscle Contraction, Cell Reports, 2016, 14 (6), 1339-134.

Valle-Orero, Eckels E.C., Stirnemann G., Popa, I., Berkovich R., Fernandez J. M., The elastic free energy of a tandem modular protein under forceBiochem. Bioph. Res. Co., 2015, 460 (2), 434-438.

Chen H., Yuan,G., Winardhi, R.S., Yao M., Popa, I., Fernandez J. M., Yan J., Dynamics of equilibrium folding and unfolding transitions of titin immunoglobulin domain under constant forcesJ. Am. Chem. Soc., 2015, 137, 3540-3546.

Saqlain F, Popa, I, Fernandez J. M., Alegre-Cebollada S., A Novel Strategy for Utilizing Voice Coil Servoactuators in Tensile Tests of Low Volume Protein HydrogelsMater. Eng., 2015, 300, 369-376.

Popa, I., Kosuri P., Alegre-Cebollada J., Garcia-Manyes S., Fernandez J. M., Force dependency of biochemical reactions measured by single-molecule force-clamp spectroscopy, Nat. Protocols, 2013, 8 (7): 1261-1276.

Popa, I., Berkovich R., Alegre-Cebollada S., Badilla C.L., Rivas-Pardo J.A., Taniguchi Y., Kawakami M., Fernandez J. M., Nanomechanics of HaloTag Tethers, J. Am. Chem. Soc., 2013, 135 (34), 12762–12771.

Berkovich R., Hermans R.I., Popa I., Stirnemann G., Garcia-Mayners S., Berne B.J., Fernandez J.M., Rate limit of protein elastic response is tether dependent, Proc. Nat. Acad. Sci. USA, 2012, 109, 14416-14421.

Borkovec M., Szilagyi I., Popa I., Finessi M., Sinha P., Maroni P., Papastavrou G., Investigating Forces Between Charged Particles in the Presence of Oppositely Charged Polyelectrolytes with the Multi-Particle Colloidal Probe Technique, Colloid Interface Sci., 2012, 179-182, 85-98.

Sinha P., Popa I., Finessi M., Ruiz-Cabello F.J.M., Szilágyi I., Maroni P., and Borkovec M., Exploring Forces between Individual Colloidal Particles with the Atomic Force Microscope, Chimia, 2011, 66, 214-217. (SCS-Metrohm Foundation Award).

Popa I., Fernandez J.M., and Garcia-Manyes S., Direct Quantification of the Attempt Frequency Determining the Mechanical Unfolding of Ubiquitin, J. Biol. Chem., 2011, 286, 31072-31079.

Finessi M., Sinha P., Szilagyi S., Popa I., Maroni P., and Borkovec M., Charge Reversal of Sulfate Latex Particles by Adsorbed Linear Poly(ethylene imine) Probed by Multiparticle Colloidal Probe Technique, Phys. Chem. B, 2011, 115, 9098-9105.

Muresan L., Maroni P., Popa I., Porus M., Longtin R., Papastavrou G., and Borkovec M., Conformational Changes of Polyamidoamine (PAMAM) Dendrimers Adsorbed on Silica Substrates, Macromolecules, 2011, 44, 5069–5071.

Popa I., Sinha P, Finessi M., Maroni P., Papastavrou G., and Borkovec M., Importance of Charge Regulation in Attractive Double-Layer Forces between Dissimilar Surfaces, Phys. Rev. Lett., 2010, 104, 228301.

Popa I., Zhang B., Maroni P., Schlüter A.D., and Borkovec M., Large Mechanical Response of Single Dendronized Polymers Induced by Ionic Strength, Angew. Chem., Int. Ed., 2010, 49, 4250-4253.

Popa I., Papastavrou G., and Borkovec M., Charge Regulation Effects on Electrostatic Patch-Charge Attraction Induced by Adsorbed Dendrimers, Phys. Chem. Chem. Phys., 2010, 12, 4863-4871.

Jiang M., Popa I., Maroni P., and Borkovec M., Adsorption of Poly-L-lysine on Silica Probed by Optical Reflectometry, Colloids Surf., A., 2010, 360, 20-25.

Popa I., Gillies G., Papastavrou G., and Borkovec M., Attractive and Repulsive Electrostatic Forces between Positively Charged Latex Particles in the Presence of Anionic Linear Polyelectrolytes, Phys. Chem. B., 2010, 114, 3170-3177.

Popa I., Papastavrou G., and Borkovec M., Effective Charge of Adsorbed Poly(amido amine) Dendrimers: Transition from Heterogeneous to Homogeneous Charge Distribution, Macromolecules, 2010, 43, 1129-1136.

Popa I., Papastavrou G., Borkovec M., Trulsson M., and Jonsson B., Long-Ranged Attractive Forces Induced by Adsorbed Dendrimers: Direct Force Measurements and Computer Simulations, Langmuir, 2009, 25, 12435-12438.

Popa I., Gillies G., Papastavrou G., and Borkovec M., Attractive Electrostatic Forces between Identical Colloidal Particles Induced by Adsorbed Polyelectrolytes, Phys. Chem. B, 2009, 113, 8458-8461.

Popa I., Longtin R., Maroni P., Papastavrou G., and Borkovec M., Adsorption and Self-Organization of Dendrimers at Water-Solid Interfaces, Chimia, 2009, 63, 279-282. (SCS Mettler-Toledo Award).

Popa I., Cahill B. P., Maroni P., Papastavrou G., and Borkovec M., Thin Adsorbed Films of a Strong Cationic Polyelectrolyte on Silica Substrates, Colloid Interface Sci., 2007, 309, 28-35.

Carja G., Popa I., Ciobanu, G., and Aelenei N., Mixed Oxides Derived from Vanadium Substituted Layered Double Hydroxides as Catalysts Precursors for SO2 Oxidation, Eng. Manage. J., 2002, 1(3), 307-311.

Lisă G., Aelenei N., Curteanu S., and Popa I., Mathematical Processing of Vapor Pressure, Rom. Acad. B, Series B: Chem. Life Sci. Geosci., 2002, 4, 2.