Our Team

Dr. Sarah Walden

Visiting Research Fellow

QUT Contact Details

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

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

Travel Grant to attend 69th Lindau Nobel Laureate Meeting
AIP Bragg Medal Nominee – Queensland Branch
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
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
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
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

[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. 2022, in press.

[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. 2022, submitted.

[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. Comm. 2022, 13, 2943.

[699] Sequence-Independent Activation of Photoreactions Using Two Colors 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.; Frisch, H.; MacLeod, J. M.; Nelson, A.; Michalek, L.; Barner-Kowollik, C. Adv. Mater. Technol. (Special Issue), 2022, 2100347.

[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.; Walden, S.L.; Frisch, H.; Barner-Kowollik,C.  Polym. Chem. (special issue) 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.

[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 Network Formation

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

Bialas, S.; Michalek, L.; Walden, S.; Bloesser, F. R.; Frisch, H.; Barner-Kowollik, C. Adv. Funct. Mater. 2020, 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.; Walden, S. L.; Graefe, D.; 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.

[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.


Fantastic work by Hendrik - SCNPs meet peptide chemistry @PolymChem

Block copolymers with light responsive main chain units - hot off the press from Linh's, Thiago's and @HatisMutlu's bench in @PolymChem https://pubs.rsc.org/en/content/articlelanding/2022/py/d2py00994c Excellent work, building on our earlier studies with Jean-Marie Lehn and @GrebGroup @QUTmaterials @QUT @KITKarlsruhe

We have developed a simple sunlight driven synthetic path to polymer microspheres - just out in @NatureComms https://www.nature.com/articles/s41467-022-32429-3 Excellent teamwork by Dr. Laura Delafresnaye, Dr. @FlorianFeist1 and Dr. Jordan Hooker. Find out more below @QUT @QUTmaterials @KITKarlsruhe