Department of Chemistry
Department of Chemistry
Academic Staff member

Dr. (Mrs.) W.K.Kumudu D. Siriwardana

Senior Lecturer Gr.II

B.Sc. (Chemistry) (Colombo,SL) ,2011 , Ph.D. (Analytical Chemistry, Nanoscience & Nanotechnology) (MSU, USA), 2017,
Email - wkkdsiriwardana@chem.ruh.ac.lk
Office -
Extention - -

LinnkedIn ResearchGate Google Scholar

  • Analytical Chemistry
  • Nanochemistry
  • Biochemistry
  • Nanomaterials for environmental remediation
  • Photocatalysis
  • Drug loaded nanoparticles
  • PUBLICATIONS
  • 1. Perera, M. ;Wijenayaka,L.A.; Siriwardana, K.; Dahanayake, D.; De Silva, K.M.N.; (2020) Gold nanopareticle decorated titania for sustainable environmental remediation:green synthesis, enhanced surface adsorption and synergistic photocatalysis. RSC Advances. 10, 29594-29602.
  • 2. Siriwardana, K.; Xu, J. X. Zou, Y.; Zhou, S.; Zhang, D.; (2018) Quantification of Gold Nanoparticle Ultraviolet-Visible Extinction, Absorption, and Scattering Cross-Section Spectra and Scattering Depolarization Spectra: The Effects of Nanoparticle Geometry, Solvent Composition, Ligand Functionalization, and Nanoparticle Aggregation. Analytical Chemistry. 90, 785-793.
  • 3. Siriwardana, K.; Nettles, C.B.; Vithanage, B.C.N.; Zhou, S.; Zhang, D.; (2017) Quantification of the Depolarization and Anisotropy of Fluorophore Stokes-Shifted Fluorescence, On-Resonance-Fluorescence, and Rayleigh-Scattering. Analytical Chemistry. 89, 6686-6694.
  • 4. Siriwardana, K.; Nettles, C.B.; Vithanage, B.C.N.; Zhou, Y.; Zhou, S.; Zhang, D.; (2016) On-Resonance Fluorescence, Resonance Rayleigh Scattering, and Ratiometric Resonance Synchronous Spectroscopy of Molecular- and Quantum Dot-Fluorophores. Analytical Chemistry. 88, 9199-9206.
  • 5. Siriwardana, K.; LaCour, A.; Zhang, D.; (2016) Critical Sequence Dependence in Multicomponent Ligand Binding to Gold Nanoparticles. The Journal of Physical Chemistry C. 120, 6900-6905.
  • 6. Suwandaratne, N.; Hu, J.; Siriwardana, K.; Gadogbe, M.; Zhang, D.; (2016) Evaluation of Thiol Raman Activities and pKa Values using Internally-referenced Raman-based pH Titration. Analytical Chemistry. 88, 3624-3631.
  • 7. Siriwardana, K.; Suwandarate N.; Perera G.S.; Collier W.; Perez, F.; Zhang, D.; (2015) Contradictory Dual Effects: Organothiol Induced Both Silver Nanoparticle Disintegration and Formation under Ambient Conditions. The Journal of Physical Chemistry C. 119, 20975-20984.
  • 8. Siriwardana, K.; Wang, A.; Gadogbe, M.; Collier, W. E.; Fitzkee, N.C.; Zhang, D.; (2015) Probing the Effect of Cysteine Residue on Protein Interactions with Silver Nanoparticles. The Journal of Physical Chemistry C.119, 2910-2916.
  • 9. Siriwardana, K.; Gadogbe, M.; Ansar, S. M.; Vasquez, E. S.; Collier, W. E.; Zou, S.; Walters, K. B.; Zhang, D.; (2014) Ligand Adsorption and Exchange on Pegylated Gold Nanoparticles. The Journal of Physical Chemistry C. 118, 11111-11119.
  • 10. Ansar, S. M.; Gadogbe, M.; Siriwardana, K.; Collier, W. E.; Rodriguez, J.; Zou, S.; Zhang, D.; (2014) Dispersion Stability, Ligand Structure and Conformation, and SERS Activities of 1-Alkanethiol Functionalized Gold and Silver Nanoparticles. The Journal of Physical Chemistry C. 118, 24925-24934.
  • 11. Siriwardana, K.; Wang, A.; Vangala, K.; Fitzkee, N.C.; Zhang, D.; (2013) Probing the Effects of Cysteine Residues on Protein Adsorption onto Gold Nanoparticles using Wild-type and Mutated GB3 Proteins. Langmuir. 29, 10990-10996.
  • 12. Ameer, F. S.; Hu, W.; Ansar, S. M.; Siriwardana, K.; Collier, W. E.; Zou, S.; Zhang, D.; (2013) Robust and Reproducible Quantification of SERS Enhancement Factors Using a Combination of Time-Resolved Raman Spectroscopy and Solvent Internal Reference Method. The Journal of Physical Chemistry C. 117, 3483-3488.
  • 13. Vangala, K.; Siriwardana, K.; Vasquez, E. S.; Xin, Y.; Pittman, C. U.; Walters, K. B.; Zhang, D.; (2013) Simultaneous and Sequential Protein and Organothiol Interactions with Gold Nanoparticles. The Journal of Physical Chemistry C.117, 1366-1374.
  • PAPERS PRESENTED
  • 1. Siriwardana, K.; Zhang, D. On-Resonance Fluorescence, Resonance Rayleigh Scattering, and Ratiometric Resonance Synchronous Spectroscopy of Molecular- and Quantum Dot-Fluorophores, Oral presentation at Pittcon conference & Expo, Chicago, IL. March, 2017.
  • 2. Siriwardana, K.; Zhang, D. Critical Sequence Dependence in Multicomponent Ligand Binding to Gold Nanoparticles, Oral presentation at Southeast Regional Meeting of the American Chemical Society, Columbia, SC. November, 2016.
  • 3. Siriwardana, K.; Zhang, D. Contradictory Dual Effects: Thiols Can Induce Both Silver Nanoparticle Disintegration and Formation under Ambient Conditions, Oral presentation at Southeast Regional Meeting of the American Chemical Society, Memphis, TN. November, 2015.
  • 4. Siriwardana, K.; Zhang, D. Mechanistic Study of Protein Interactions with Silver Nanoparticles using Chemically- and Biologically-Modified Proteins, Oral presentation at Southeast Regional Meeting of the American Chemical Society, Nashville, TN. October, 2014.
  • 5. Siriwardana, K.; Zhang, D. Studying the Assembly and Structure of Pegylated Gold Nanoparticles using Adenine and 2-Mercaptobenzimidazole as Molecular Probes, Oral presentation at 247th American Chemical Society National Meeting, Dallas, TX. March, 2014.
  • 2011 Dharmachandra & Tamarasa Gunawardhana Memorial Gold Medal for Analytical Chemistry,University of Colombo, Sri Lanka.
  • 2016 Graduate student travel award, Mississippi State University, MS, USA.
  • 2017 Graduate student travel award, Mississippi State University, MS, USA.