Underline denotes member of Ullal Lab. § denotes Equal Contribution. * denotes Corresponding Authorship.

Kenath G.S., Karanastasis A.A., and Ullal C.K.*, “Super-Resolution Imaging of Spatial Heterogeneities in Model Thermosensitive Hydrogels with Implications for Their Origins” Macromolecules, 54, 7743-7753, 2021.

Habib, A. §, Vijayamohanan, H. §, Ullal C.K.*, and Sundararaman R.*, “Coupled Electromagnetic and Reaction Kinetics Simulation of Super-Resolution Interference Lithography” Journal of Physical Chemistry B, 124, 7717-7724, 2020.

Karanastasis A.A. §*, Kenath G.S. §,  Andersen D., Fokas D., Ryu C.Y., and Ullal C.K., “One-pot Surfactant-free Modulation of Size and Functional Group Distribution in Thermoresponsive Microgels” Journal of Colloid and Interface Science, 568, 264-272, 2020. 

Karanastasis A.A. §, Kenath G.S. §, Sundararaman R., and Ullal C.K.*, “Quantification of Functional Crosslinker Kinetics via Super-resolution Microscopy of Swollen Microgels” Soft Matter, 15, 9336 – 9342, 2019. 

Vijayamohanan H., Kenath G.S., Palermo E.F., and Ullal C.K.*, “Super-resolution Interference Lithography Enabled by Non-Equilibrium Kinetics of Photochromic Monolayers”, RSC Advances, 9, 28841 – 28850, 2019.

Ning X.*, Chittigori J., Li Y., Horner G., Zhou Z., Ullal C.K.* and Schadler L.S., “Dye Doped Concentric Shell Nanoparticles for Enhanced Photophysical Performance of Downconverting Light Emitting Diodes” Journal of Colloid and Interface Science, 556(15), 753-760, 2019.

Deagen M.E., Chan E.P., Schadler L.S., and Ullal C.K.*,“Corona Treatment for Nano-Transfer Molding Adhesion”, ACS Applied Polymer Materials, 1(5), 997 – 1005, 2019.

Vijayamohanan H., Bhide P.M., Boyd D., Zhou Z., Palermo E.F. and Ullal C.K. *, “Effect of chemical microenvironment in spirothiopyran monolayer direct-write photoresists” Langmuir, 35(11), 3871 – 3879, 2019.

Ullal C.K., Shi J., Sundararaman R.*, “Electron mobility in graphene without invoking the Dirac equation” American Journal of Physics, 87, 291, 2019.

Deagen M., Chan E.P., Schadler L.S., and Ullal C.K.*, “Size effects in plasma-enhanced nano-transfer adhesion” Soft Matter 14, 9220-9226, 2018.

Karanastasis A.A., Zhang Y., Kenath G.S., Lessard M.D., Bewersdorf J., and Ullal C.K.*, “3D Mapping of Nanoscale Heterogeneities in Microgels” Materials Horizons 5, 1130 – 1136, 2018.

Deagen M., Schadler L.S. and Ullal C.K.*, “Wetting regimes for residual-layer-free transfer molding at the micro- and nanoscale” ACS Applied Materials and Interfaces 9(41), 36385 – 36391, 2017. 

Vijayamohanan H., Palermo E.F. and Ullal C.K.*, “Spirothiopyran-Based Reversibly Saturable Photoresist” Chemistry of Materials 29 (11), 4754 – 4760, 2017.

Wang L., Ta H., Ullal C., Wang F.*, Wang C., Dong G., “Aptamer functionalized silver clusters for STED microscopy” RSC Advances 7, 11821 – 11826, 2017.

Li Y.*, Wang L., Natarajan B., Tao P., Benicewicz B.C., Ullal C.K. and Schadler L., “Bimodal matrix-free polymer nanocomposites” RSC Advances 5, 14788 – 14795, 2015.

Prior to RPI

Ullal C.K., Primpke S.§, Schmidt R.§, Böhm U., Egner A., Vana P.*, and Hell S.W., “Flexible Microdomain Specific Staining of Block Copolymers for 3D Optical Nanoscopy”, Macromolecules, 44 (19), 7508 – 7510, Sept. 2011.

Lauterbach M.A., Ullal C.K.*, Westphal V., and Hell S.W.*, “Dynamic Imaging of Colloidal-Crystal Nanostructures at 200 Frames per Second”, Langmuir, 26 (18), 14400-4, Sept 2010. (Cover article) 

Ullal C.K.§, Schmidt R.§, Hell S.W.*, and Egner A., “Block copolymer nanostructures mapped by far-field optics”, Nano Letters, 9 (6), 2497-2500, Jun 2009. 

Harke B., Keller J., Ullal C.K., Westphal V., Schoenle A., and Hell S.W.*, “Resolution scaling in STED microscopy”, Optics Express, 16 (6), 4154-4162, Mar 2008. 

Harke B. §, Ullal C.K., Keller J., and Hell S.W.*, “Three-dimensional nanoscopy of colloidal crystals”, Nano Letters, 8 (5), 1309 - 1313, May 2008. (Cover article) 

Jang J.-H.§, Ullal C.K. §, Maldovan M. §, Gorishnyy T., Koh C.Y., Kooi S., and Thomas E.L.*, “3D micro- and nanostructures via interference lithography”, Advanced Functional Materials (Invited Feature Article), 17 (16), 3027-3041, 2007. 

Jang J.–H., Ullal C.K., Kooi S.E., Koh C.Y., and Thomas E.L.*, “Shape control of multivalent 3D colloidal particles via interference lithography”, Nanoletters, 7 (3), 647-651, 2007. 

Maldovan M. *, Ullal C.K., Jang J.–H., and Thomas E.L., “Sub-micrometer scale periodic porous cellular structures: Microframes prepared by holographic interference lithography”, Advanced Materials, 19 (22), 3809-3813, 2007.

Jang J.–H., Ullal C.K., Choi T.Y., Lemieux M.C., Tsukruk V.V., and Thomas E.L.*, “3D Polymer microframes that exploit length-scale dependent mechanical behavior”, Advanced Materials, 18 (16), 2123-2127, 2006. (Cover Article)

Jang J.-H., Ullal C.K., Gorishnyy T., Tsukruk V.V., and Thomas E.L. *, “Mechanically tunable three-dimensional elastomeric network/air structures via interference lithography”, Nano Letters, 6(4), 740-743, 2006.

Choi T., Jang J.–H., Ullal C.K., LeMieux M.C., Tsukruk V.V. *, and Thomas E.L. *, “The elastic properties and plastic behavior of two-dimensional polymer structures fabricated by laser interference lithography”, Advanced Functional Materials, 16 (10), 1324-1330, 2006. (Inside Front Cover Article)

Yang S. *, Megens M., Chen G., Ullal C.K., Han Y.–J., Rapaport R., Thomas E.L., and Aizenberg J.A. *, “Functional biomimetic microlens arrays with integrated pores”, Advanced Materials, 17 (4), 435, Feb 2005. 

Gorishnyy T. *, Ullal C.K., Maldovan M., Fytas G., and Thomas E.L., “Hypersonic phononic crystals”, Physical Review Letters, 94 (11), 115501, Mar 2005.

Yang S.*, Ullal C.K., Chen G., Thomas E. L., and Aizenberg J.A.*, “Microlens arrays with integrated pores as a multipattern photomask”, Applied Physics Letters, 86(20), 201121, May 2005.

Ullal C.K. *, Maldovan M., Chen G., Han Y.-J., Yang S., and Thomas E.L., “Photonic crystals through holographic lithography: simple cubic, diamond like and gyroid like structures”, Applied Physics Letters, 84 (26), 5434 – 5436, Jun 2004.

Maldovan M., Ullal C. K., Carter W.C., and Thomas E.L. *, “Exploring for 3D photonic bandgap structures in the 11 f.c.c. space groups”, Nature Materials, 2 (10), 664-667, Oct 2003.

Ullal C.K., Maldovan M., Wohlgemuth M., White C.A., Yang S., and Thomas E.L. *, “Triply periodic bicontinuous structures through interference lithography: a level set approach”, Journal of the Optical Society of America A- Optics Image Science and Vision, 20 (5), 948–954, May 2003.

Deopura M. *, Ullal C.K., Temelkuran B., and Fink Y., “Dielectric omnidirectional visible reflector”, Optics Letters, 26 (15), 1197-1199, Aug 2001.

Ullal C.K., Balasubramaniam K.R., Gandhi A.S., and Jayaram V. *, “Non-equilibrium phase synthesis in Al2O3-Y2O3 by spray pyrolysis of nitrate precursors”, Acta Materialia, 49 (14), 2691-2699, Aug 2001.