The University of Massachusetts Amherst

Ryan C. Hayward


Our research areas include assembly of polymer and particle-based nanostructures; mechanics and instabilities of soft active materials.

Current Research
Our work focuses on tailored nanoscale assemblies of polymers and nanoparticles, and on stimuli-responsive materials that can be dynamically reconfigured to change their structures and properties. With regards to delivery, we have developed a number of methods to formulate micelle, capsule, and double emulsion structures containing both active ingredients and other functional cargos for targeting and imaging. We have also established new approaches for the application of stimuli-responsive hydrogel films and surfaces to reversibly encapsulate a wide variety of materials.

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Academic Background

  • BSE Chemical Engineering, Princeton University, 1999
  • PhD Chemical Engineering, UC Santa Barbara, 2004
A. Sathyan, R.C. Hayward, T. Emrick "Ring-Opening Polymerization of Allyl-Functionalized Lactams", Macromolecules, 52, 167-175 (2019).
R.A. Letteri, C.F. Santa Chalarca, Y. Bai, R.C. Hayward, T. Emrick, “Forming Sticky Droplets from Slippery Polymer Zwitterions”, Advanced Materials, 29, 1702921 (2017).
K.H. Ku, J. Shin, D. Klinger, S.G. Jang, R.C. Hayward, C.J. Hawker, B.J. Kim, “Particles with Tunable Porosity and Morphology by Controlling Interfacial Instability in Block Copolymer Emulsions”, ACS Nano, 10, 5243-5251 (2016).
B. Xu, Q. Liu, Z. Suo, R.C. Hayward, “Reversible electrochemically-triggered delamination blistering of hydrogel films on micro patterned electrodes”, Advanced Functional Materials, 26, 3218-3225 (2016).
C.-C. Chang, R. Letteri, R.C. Hayward, T. Emrick, “Functional Sulfobetaine Polymers: Synthesis and Salt-Responsive Stabilization of Oil-in-Water Droplets”, Macromolecules, 48, 7843-7850 (2015).
D. Chen, C.-C. Chang, B. Cooper, A. Silvers, T. Emrick, R.C. Hayward, “Photo‐patternable Biodegradable Aliphatic Polyester with Pendent Benzophenone Groups”, Biomacromolecules, 16, 3329-3335 (2015).
J. Bae, T.P. Russell, R.C. Hayward, "Osmotically-driven formation of double emulsions stabilized by amphiphilic block copolymers" Angewandte Chemie International Edition, DOI: 10.1002/anie.201405229 (2014).
B. Xu, R.C. Hayward, "Low voltage switching of crease patterns on hydrogel surfaces", Advanced Materials, DOI: 10.1002/adma.201300968 (2013).
C.A. Vaine, M.K. Patel, J. Zhu, E. Lee, R.W. Finberg, R.C. Hayward, E.A. Kurt-Jones, "Tuning Innate Immune Activation by Surface Texturing of Polymer Microparticles: The Role of Shape in Inflammasome Activation", Journal of Immunology, 190, 1200492 (2013).
J.Kim, J.A. Hanna, M. Byun, C.D. Santangelo, R.C. Hayward, “Designing responsive buckled surfaces by halftone gel lithography”, Science, 335, 1201-1205 (2012).
J. Bae, J. Lawrence, C. Miesch, A. Ribbe, W.K. Li, T. Emrick, J. Zhu, R.C. Hayward, “Multifunctional Nanoparticle-Loaded Spherical and Wormlike Micelles Formed by Interfacial Instabilities”, Advanced Materials, 24, 2735-2741 (2012).
M.C. Chiappelli, R.C. Hayward, "Photonic multilayer sensors from photo-crosslinkable polymer films", Advanced Materials, 24, 6100-6104 (2012).
Contact Info

Department of Polymer Science & Engineering
A317 Conte Research Center
120 Governors Drive
Amherst, MA 01003

(413) 577-1317