Dr Sarah Walden

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Role in the Centre

Sarah Walden is a unique member of QUT’s Soft Matter Materials Laboratory, being the only physicist. In this role she primarily investigates new materials for sub-diffraction lithography as well establishing new experimental methods to probe photochemical reactions. Sarah oversees the Soft Matter Materials group’s laser facility, comprising three tuneable, nanosecond-pulsed OPOs. Sarah facilitates the incorporation of these lasers into existing characterisation methods to provide novel in situ reaction monitoring. She has expertise in the areas of light-matter interactions, optical characterisation methods, z-scan technique and transient absorption spectroscopy. Sarah is currently supervising two PhD students.

Short Biography

Sarah received a B.Math/BAppSc(Phys) (Hons) from QUT, Australia, in 2012. In 2017 she completed a PhD at QUT, investigating the nonlinear optical properties of semiconductor nanoparticles. Her research interests include light-matter interactions and nonlinear optical properties of materials. She is currently a Postdoctoral Fellow on a joint project between the Soft Matter Materials Laboratory and the Wegener group at the Karsluhe Institute of Technology, investigating new materials for sub-diffraction resolution lithography.

Selected Publications

“Accurate determination of nonlinear refraction in ZnO and Au composite nanostructures” Walden, S. L.; Fernando, J.F.S.; Shortell, M.P.; Jaatinen, E.A. Opt. Mater. Exp. 2020, 10, 653-661.

“Light Induced Ligation of o-Quinodimethanes with Gated Fluorescence Self-Reporting” Feist, F.; Rodrigues, L.L.; Walden, S.L.; Krappitz, T.W.; Dargaville, T.R.; Weil, T.; Goldmann, A.S.; Blinco, J.P.; Barner-Kowollik, C. J. Am. Chem. Soc. 2020, 142, 7744-7748. (Highlighted in JACS Spotlights).

“Revealing the Wavelength Dependence of Photochemical Reactions: Cutting Edge Research in the Teaching Lab” Walden, S.L.; Frisch, H.; Unterreiner, B.; Unterreiner, A.-N.; Barner-Kowollik, C. J. Chem. Educ. 2020, 97, 543-548. (Journal cover).

“It’s a Trap: Thiol-Michael Chemistry on a DASA Photoswitch” Alves, J.; Wiedbrauk, S.; Walden, S.L.; Graefe, D.; Blinco, J.P.; Barner-Kowollik, C. Chem. Eur. J. 2020, 26, 809-813.

“Nonlinear Absorption and Fluorescence in ZnO and ZnO-Au Nanostructures” Walden, S.L.; Fernando, J.F.S.; Shortell, M.P.; Waclawik, E.R.; Jaatinen, E.A. Adv. Opt. Mater. 2016 4(12), 2133–2138.