Professor Vlassak studies the thermo-mechanical behavior of a broad range of engineering materials. He has developed experimental methods to characterize phase transitions and solid-state reactions in thin films, plastic deformation of coatings, elastic anisotropy in indentation, and fracture of thin films. Current experimental research projects focus on the mechanical behavior of hydrogels (Figure 1, 2) and the use of hydrogels as ionic conductors in 3D printed devices (Figure 3). Recently, Professor Vlassak pioneered the use of combinatorial nanocalorimetry (Figure 4) for the development and analysis of complex materials systems, including metallic glasses, ultra-high temperature ceramics (Figure 5), and high-temperature shape memory alloys. Combinatorial nanocalorimetry provides a convenient way of mapping the energetics and kinetics of phase transitions and solid-state reactions as a function of composition, making it an ideal experimental tool for the Materials Genome Project (Figure 6). The technique also lends itself for the characterization of thermal fatigue and stability of functional materials, as well as for the optimization of heat treatments.