46. Nowitzke J., Bista S., Raman S., Dahal N., Stirnemann G., and Popa I., Mechanical unfolding of network nodes drives the stress response of protein-based materials, ACS Nano, 2024, 18, 45, 31031-31043.

45. Popa I., A Study on How Conformation Entropy of Attached Macromolecules Drives Polymeric Collapse and Protein Folding. Macromol. Theory Simul. 2024, 2400004.

44. Popa I. and Berkovich, R., Mechanical unfolding response of proteins, ACS In Focus, American Chemical Society, 2023, ISBN 978-0-84129-974-0.

43. Popa I., Modeling and Simulations of Multicomponent Hydrogels for Biomedical Applications, Chapter 9 in Multicomponent Hydrogels: Smart Materials for Biomedical Applications, Royal Society of Chemistry, 2023, ISBN: 978-1-83916-727-0.

42. Nowitzke J. and Popa, I. , What Is the Force-per-Molecule Inside a Biomaterial Having Randomly Oriented Units?, J. Phys. Chem. Lett. , 2022, 13, 31, 7139–7146.

41. Dahal N., Sharma, S., Phan B., Eis A., and Popa I., Mechanical regulation of talin through binding and history-dependent unfolding, Sci. Adv., 2022, 8 (28), eabl7719.

40. Popa, I. and Saitis, F., Using Magnets and Flexible 3D-Printed Structures to Illustrate Protein (Un)folding, J. Chem. Educ. , 2022, 99, 8, 3074–3082.

39. Chetrit, E., Sharma, S., Maayan, U., Pelah, M. G., Klausner, Z., Popa, I. and Berkovich, R., Nonexponential kinetics in captured in sequential unfolding of polyproteins over a range of loads, Curr. Res. Struct. Biol., 2022, 4, 106-117.

38. Slawinski M., Khoury L.R., Sharma S., Nowitzke J., Gutzman J.H., and Popa I., Kinetic Method of Producing Pores Inside Protein-Based Biomaterials without Compromising Their Structural Integrity, ACS Biomater. Sci. Eng., 2022, 8 (3), 1132–1142.

37. Adhikari D.P., Biener G., Stoneman M.R., Badu D.N., Paprocki J.D., Eis A., Park P.S-H., Popa I., Raicu V., Comparative photophysical properties of some widely used fluorescent proteins under two-photon excitation conditions, Spectrochim. Acta A Mol. Biomol. Spectrosc., 2021, 262, 120133.

36. Sharma S., Subramani S., and Popa I., Does protein unfolding play a functional role in vivo?, FEBS J., 2021, 288 (6), 1742- 758.
Selected for the cover of the issue.

35.  Khoury L. R., Slawinski M.,  Collison D. R., Popa I. , Cation-induced shape programming and morphing in protein-based hydrogels, Sci. Adv., 2020, 6 (18), eaba6112.

34. Dahal N., Nowitzke J., Eis A., Popa I., Binding Induced Stabilization Measured on the Same Molecular Protein Substrate using Single Molecule Magnetic Tweezers and Hetero-Covalent Attachments, J. Phys. Chem. B, 2020,  124 (16), 3283-3290.
Selected for the cover of the issue.

33. Khoury L.R. and Popa I., Chemical unfolding of protein domains induces shape change in programmed protein hydrogels, Nat. Commun., 2019, 10 (1), 5439.

32. Stoneman M., Biener G., Ward R., Pediani J., Badu D., Eis A., Popa I., Milligan G., Raicu V., A general method to quantify ligand-driven oligomerization from fluorescence-based images, Nat. Methods, 2019, 16 (6), 493–496.

31. Popa I. and Gutzman J.H., The extracellular matrix–myosin pathway in mechano-transduction: from molecule to tissue, Emerging Topics in Life Sciences, 2018, 2 (5), 727-737.

30. Popa I. and Berkovich R., Mechanobiology: Protein refolding under force, Emerging Topics in Life Sciences, 2018, 2 (5), 687-699.

29. Shmilovich K. and Popa I., Modeling protein-based hydrogels under force, Phys. Rev. Lett., 2018, 121 (16), 168101-(1-5).

28. Khoury L.R., Nowitzke J., Dahal N.R., Shmilovich K., Eis, A., Popa I., Force-Clamp Rheometry for Characterizing Protein-based Hydrogels, J. Vis. Exp., 2018, 138, e58280.

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

26.   Valle-Orero J., Tapia-Rojo R., Eckels E.C., Rivas-Pardo J.A., Popa I., Fernandez J.M., Proteins Breaking Bad: A Free Energy Perspective, J. Phys. Chem. Lett., 2017, 8 (15), 3642–3647.

25.   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., 2017, 56 (33), 9741 –9746.

24.   Valle-Orero J., Rivas-Pardo J. A., Popa I.,  Multidomain proteins under force, Nano-technology, 2017, 28 (17), 174003.

23.   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., 2016, 138 (33), 10546–10553.
Featured in JACS Spotlight “Getting the Long View on Protein Folding” by Erika Gebel Berg.

22.   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), 1339-1347.

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

20.   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 forces, J. Am. Chem. Soc., 2015, 137 (10), 3540-3546.

19.   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 Hydrogels, Mater. Eng., 2015, 300 (3), 369-376.

18.   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.

17.   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.

16.   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 (36), 14416-14421.

15.   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.

14.   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).

13.   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.

12.   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, J. Phys. Chem. B, 2011, 115, 9098-9105.

11.   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.

10.   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.

9.   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.

8.   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.

7.   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.

6.   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, J. Phys. Chem. B., 2010, 114, 3170-3177.

5.   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.

4.   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.

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

2.   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).

1.   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.