Our Team

Name: Macroarc
Telephone: (07) 3138 9047

Dr. Sarah Walden

Visiting Research Fellow

QUT Contact Details

mailto:sl.walden@qut.edu.au

Brief Curriculum Vitae

since 11/17	Postdoctoral researcher under supervision of Prof. Christopher Barner-Kowollik and A/Prof. James Blinco, Queensland University of Technology (QUT), Brisbane
2013 – 2017	Doctor of Philosophy (Physics) ‘Nonlinear Optical Properties of ZnO and ZnO-Au nanostructures for Nanoscale UV Emission’ Queensland University of Technology – Brisbane Australia
2012	Bachelor of Applied Science (Honours) ‘Quantum Mechanical Model of Second Harmonic Generation in Thin Gold Films’ Queensland University of Technology – Brisbane, Australia
*2008 – 2011*	Bachelor of Mathematics/Bachelor of Applied Science (Physics) Queensland University of Technology – Brisbane, Australia

Research Interests and Opportunities

Light Matter Interactions

Nonlinear absorption and refraction in nanomaterials
Z-scan Technique for characterisation of organic & inorganic materials
Transient absorption spectroscopy on nano- and femto- timescales
Pump-Dump-Probe measurements

Laser Coupled Characterisation Techniques

Insitu-UV-Vis monitoring of photoreactions
Laser-coupled QCM-D
Laser-coupled AFM – Force Spectroscopy

Awards and Prizes

2019	Travel Grant to attend 69^th Lindau Nobel Laureate Meeting
2018	AIP Bragg Medal Nominee – Queensland Branch
2016	Higher Degree Research Student High Achiever Award The award is presented monthly to higher degree research students who excel in their research, producing high quality research output
2013 – 2016	QUT Excellence Top-Up Scholarship PhD scholarship awarded to top 30 commencing PhD students annually
2013 – 2016	Australian Postgraduate Award Scholarship award to undertake PhD research
2013 – 2016	Dean’s Merit Award for B.App.Sci. (Hons) Awarded to students who achieve a grade point average of 6.50 out of 7 and higher
2008 – 2010	Dean’s Merit Award for B.Math./B.App.Sci. (Physics) Awarded to students who achieve a grade point average of 6.50 out of 7 and higher

Presentations

[03]	Walden, S.L., Fernando, J. F. S., Shortell, M. P., Jaatinen, E. A. (2016) Nonlinear optical properties of colloidal ZnO-Au nanostructures. Oral Presentation at IEEE International Conference on Nanotechnology, Sendai, Japan
[02]	Walden, S. L., Fernando, J. F. S., Shortell, M. P., Waclawik, E. R., & Jaatinen, E. A. (2016). Dependence of Au morphology on nonlinear optical properties of ZnO-Au nanostructures. Poster presented at Australian Institute of Physics Conference, Brisbane, Australia
[01]	Walden, S. L., Jaatinen, E. A., Chou, A. (2012). Second harmonic Generation in Thin Gold Films. Poster presented at Australian Institute of Physics Conference, Sydney, Australia

Publications

2024

[742]	*Photochemical Action Plots Reveal the Fundamental Mismatch between Absorptivity and Photochemical Reactivity* Walden, S. L.; Carroll, J. A.; Unterreiner, A.-N.; Barner-Kowollik, C. Adv. Sci. 2024, 11, 2306014.
[715]	*First Principles for the First Steps in Multiphoton 3D Laser Printing: Quantum-Mechanical Case Study of DETC* Mauri, A.; Kiefer, P.; Neidinger, P.; Messer, T.; Bojanowski, M.; Yang, L.; Walden, S. L.; Unterreiner, A.-N.; Barner-Kowollik, C.; Wegener, M.; Wenzel, W.; Kozlowska, M. 2024, submitted.

2023

[751]	*Wavelength-Resolved Near Infra-red Light Induced Free-Radical Polymerization* Neidinger, P.; Davis, J.; Carroll, J. A.; Kammerer, J. A.; Jaatinen, E.; Walden, S. L.; Unterreiner, A.-N.; Barner-Kowollik, C. Polym. Chem. 2023, 14, 4912-4917.
[747]	*Visible light-induced switching of soft matter materials properties based on thioindigo photoswitches* Walden, S. L.; Nguyen, P. H. D.; Li, H. K.; Liu, X.; Le, M. T. N.; Loh, X. J.; Barner-Kowollik, C.; Truong, V. X. Nat. Commun. 2023, 14, 8298.
[731]	*Two Photon Induced Pulsed Laser Polymerization with Near Infrared Light* Neidinger, P.; Voll, D.; Walden, S. L.; Unterreiner, A.-N.; Barner-Kowollik, C. ACS Macro Lett. 2023, 12, 308-313.

2022

[716]	*Near Infrared Light Induced Radical Polymerization in Water* Neidinger, P.; Davis, J.; Voll, D.; Jaatinen, E. A.; Walden, S. L.; Unterreiner, A.-N.; Barner-Kowollik, C. Angew. Chem. Int. Ed. 2022, 61, e202209177.
[709]	*Regioisomerism in Symmetric Dimethyl Dialdehydes Dictates their Photochemical Reactivity* Feist, F.; Rodrigues, L. L.; Walden, S. L.; Barner-Kowollik, C. J. Org. Chem. 2022, 87, 9296-9300.
[705]	*Orange-Light-Induced Photochemistry Gated by pH and Confined Environments* Kodura, D.; Rodrigues, L. L.; Walden, S. L.; Goldmann, A. S.; Frisch, F.; Barner-Kowollik, C. J. Am. Chem. Soc. 2022, 144, 6343-6348.
[703]	*Two-Colour Light Activated Covalent Bond Formation* Walden, S. L.; Rodrigues, L. L.; Alves, J.; Blinco, J. P.; Truong, V. X.; Barner-Kowollik, C. Nat. Commun. 2022, 13, 2943.
[699]	*Sequence-independent activation of photocycloadditions using two colours of light* Kamm, P. W.; Rodrigues, L. L.; Walden, S. L.; Blinco, J. P.; Unterreiner, A.-N.; Barner-Kowollik, C. Chem. Sci. 2022, 13, 531-535.
[687]	*Light-Gated Control of Conformational Changes in Polymer Brushes* Bialas, S.; Krappitz, T.; Walden, S. L.; Kalayci, K.; Kodura, D.; Frisch, H.; MacLeod, J. M.; Nelson, A.; Michalek, L.; Barner-Kowollik, C. Adv. Mater. Technol. (Special Issue), 2022, 7, 2100347.

2021

[697]	*Action Plots in Action: In-Depth Insights into Photochemical Reactivity* Irshadeen, I. M.; Walden, S. L.; Wegener, M.; Truong, V. X.; Frisch, H.; Blinco, J. P.; Barner-Kowollik, C. J. Am. Chem. Soc. 2021, 143, 21113-21126.
[691]	*Two Sides of the Same Coin: Light as a Tool to Control and Map Microsphere Design* Walden, S. L.; Hooker, J. P.; Delafresnaye, L.; Barner-Kowollik, C. ACS Macro Lett. 2021, 10, 851-856.
[689]	*Green Light LED Activated Ligation of a Scalable, Versatile Chalcone Chromophore* Irshadeen, I. M.; de Bruycker, K.; Micallef, A. S.; Walden, S. L.; Frisch, H.; Barner-Kowollik, C. Polym. Chem. 2021, 12, 4903-4909.
[677]	*Chemiluminescent Self-Reported Unfolding of Single-Chain Nanoparticles* Bloesser; F. R.; Walden, S. L.; Irshadeen, I. M.; Chambers, L. C.; Barner-Kowollik, C. Chem. Commun. 2021, 57, 5203-5206.
[667]	*The Bright and the Dark Side of the Sphere: Light-Stabilized Microparticles* Schmitt, C. W.; Walden, S. L.; Delafresnaye, L.; Houck, H. A.; Barner, L.; Barner-Kowollik, C. Polym. Chem. 2021, 12, 449-457.
[650]	*Wavelength-gated Photochemical Synthesis of Phenalene Diimides* Feist, F.; Walden, S. L.; Alves, J.; Kunz, S.; Micallef, A.; Brock, A.; McMurtrie, J.; Weil, T.; Blinco, J. P.; Barner-Kowollik, C. Angew. Chem. Int. Ed. 2021, 60, 10402-10408.

2020

[671]	*Mapping Photochemical Reactivity Profiles on Surfaces* Michalek, L.; Krappitz, T.; Mundsinger, K.; Walden, S. L.; Barner, L.; Barner-Kowollik, C. J. Am. Chem. Soc. 2020, 142, 21651-21655.
[652]	*Chemiluminescent read-out of para-fluoro-thiol reaction events* Bloesser, F. R.; Cavalli, F.; Walden, S. L.; Barner, L.; Barner-Kowollik, C. Chem. Commun. 2020, 56, 14996-14999.
[644]	*2D Fabrication of Tuneable Responsive Interpenetrating Polymer Networks from a Single Photoresist* Michalek, L.; Bialas, S.; Walden, S.; Bloesser, F. R.; Frisch, H.; Barner-Kowollik, C. Adv. Funct. Mater. 2020, 30, 2005328.
[633]	*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.
[625]	*It’s a Trap: Thiol-Michael Chemistry on a DASA Photoswitch* Alves, J.; Wiedbrauk, S.; Gräfe, D.; Walden, S. L.; Blinco, J. P.; Barner-Kowollik, C. Chem. Eur. J. 2020, 26, 809-813.
[617]	*It’s in the Fine Print: Erasable Three-Dimensional Laser-Printed Micro- and Nanostructures* Graefe, D.; Walden, S.; Blinco, J. P.; Wegener, M.; Blasco, E.; Barner-Kowollik, C. Angew. Chem. Int. Ed. 2020, 59, 6330-6340.
[04]	*Revealing the Wavelength Dependence of Photochemical Reactions: Cutting-Edge Research in the Teaching Lab* Walden, S.; Frisch, H.; Unterreiner, B.; Unterreiner, A.-N.; Barner-Kowollik, C. J. Chem. Educ. 2020, 97, 543-548.

Other Publications

2016

[04]	Accurate determination of nonlinear refraction in ZnO and Au composite nanostructures Walden, S. L., Fernando, J. F. S., Shortell, M. P., & Jaatinen, E. A. Optical Materials Express 2020, 10, 653-661.
[03]	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. Advanced Optical Materials 2016, 4, 2133–2138.
[02]	Modelling Gaussian beam propagation through thick nonlinear refractive and absorptive media Namarathne, D., Walden, S. L., Shortell, M. P., Jaatinen, E. A. Applied Physics A 2016, 122, 319.
[01]	Multi-angle fluorometer technique for the determination of absorption and scattering coefficients of subwavelength nanoparticles Shortell, M. P., Hewins, R. A., Fernando, J. F. S., Walden, S. L., Waclawik, E. R., Jaatinen, E. A. Optics Express 2016, 24, 17090.

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