Refereed publications

Showing all 45 refereed publications.

1. 2025

   E. J. Hennessey, A. Smolina, S. Hennessey, A. Tassone, A. Jay, S. Ghose and K. C. Hewitt. “Canadian Physics Counts: An Exploration of the Diverse Identities of Physics Students and Professionals in Canada.” FACETS, vol. 10, pp. 1–16, 2025.

   Equity in STEMM
2. 2025

   H. Guo, B. Gala Lopez, I. P. Alwayn and K. C. Hewitt. “Liver discard rate due to conservative estimations of steatosis: an inference-based approach.” Transplantation, vol. 109, no. 10, pp. e609–e618, 2025.

   Optical diagnostics
3. 2024

   H. Guo, A. Stueck, J. Doppenberg, Y. Chae, A. Tikhomirov, H. Zeng, M. Engelse, B. Gala-Lopez, A. Mahadevan-Jansen, I. P. Alwayn, A. Locke and K. C. Hewitt. “Evaluation of minimum-to-severe global and macrovesicular steatosis in human liver specimens: a portable ambient light-compatible spectroscopic probe.” J. Biophotonics, vol. 17, no. 12, p. e202400292, 2024.

   Optical diagnostics
4. 2024

   H. Guo, V. Zions, B. Law and K. C. Hewitt. “Potential of Raman-Reflectance Combination in Quantifying Liver Steatosis and Fat Droplet Size.” J. Biophotonics, vol. 17, p. e202400156, 2024.

   Optical diagnostics
5. 2022

   H. Guo, A. B. Tikhomirov, A. Mitchell, I. P. J. Alwayn, H. Zeng and K. C. Hewitt. “Real-time assessment of liver fat content using a filter-based Raman system, operating under ambient light through lock-in amplification.” Biomedical Optics Express, vol. 13, no. 10, pp. 5231–5245, 2022.

   Optical diagnosticsJournal cover
6. 2021

   M. L. Castilho, V. P. S. Jesus, P. F. A. Viera, K. C. Hewitt and L. Raniero. “Chlorin e6-EGF conjugated gold nanoparticles as a therapeutic agent for triple negative breast cancer.” Photodiagnosis and Photodynamic Therapy, vol. 33, p. 102186, 2021.

   Optical diagnostics
7. 2019

   Y. E. Monfared, T. M. Shaffer, S. S. Gambhir and K. C. Hewitt. “Continuous-Wave Coherent Raman Spectroscopy via Plasmonic Enhancement.” Scientific Reports, vol. 9, p. 12092, 2019.

   Molecular holography
8. 2018

   T. Bhattacharjee, M. L. Castilho, I. Oliveira, V. Jesus, K. C. Hewitt and L. Raniero. “FTIR study of secondary structure changes in Epidermal Growth Factor by gold nanoparticle conjugation.” Biochimica et Biophysica Acta (BBA) – General Subjects, vol. 1862, no. 3, pp. 495–500, 2018.

   Optical diagnostics
9. 2017

   C. L. D. Lee and K. C. Hewitt. “First Demonstration of Surface Enhanced – Stimulated Raman Spectroscopy (SE-SRS) using low-power CW sources.” Faraday Discuss., vol. 205, pp. 227–232, 2017.

   Molecular holography
10. 2017

    J. Aizpurua, H. Arnolds, J. Baumberg, I. Bruzas, R. Chikkaraddy, M. Chisanga, P. Dawson, V. Deckert, I. Delfino, B. de Nijs, G. Di Martino, J. Edel, H. Fleming, S. Gawinkowski, F. Giorgis, R. Goodacre, D. Graham, M. Hardy, C. Heck, S. Heeg, K. Hewitt, L. Jamieson, A. Keeler, A. Krolikowska, C. Kuttner, N. Lidgi-Guigui, C. Lightner, J. Lombardi, S. Mahajan, N. M. Sabanes, J. F. Masson, N. S. Mueller, H. Muhamadali, K. Murakoshi, J. Popp, M. Porter, S. Reich, G. Schatz, Z. Q. Tian, A. Tripathi, R. Van Duyne, X. P. Wang, A. Wark, K. Willets and M. Willner. “Ultrasensitive and towards single molecule SERS: general discussion.” Faraday Discuss., vol. 205, pp. 291–330, 2017.

    Molecular holography
11. 2017

    L. Vieira, M. L. Castilho, I. Ferreira, J. Ferreira-Strixino, K. C. Hewitt and L. Raniero. “Synthesis and characterization of gold nanostructured Chorin e6 for Photodynamic Therapy.” Photodiagnosis and Photodynamic Therapy, vol. 18, pp. 6–11, 2017.

    Optical diagnostics
12. 2017

    M. L. Castilho, K. C. Hewitt and L. Raniero. “FT-IR characterization of a theranostic nanoprobe for photodynamic therapy and Epidermal Growth Factor Receptor targets.” Sensors & Actuators: B. Chemical, vol. 240, pp. 903–908, 2017.

    Optical diagnostics
13. 2016

    C. L. D. Lee, S. A. Fashir, M. L. Castilho, M. A. Hupman, L. J. Raniero, I. Alwayn and K. C. Hewitt. “EGFR-specific nanoprobe biodistribution in mouse models.” Journal of Pharmaceutical Sciences, vol. 105, pp. 25–30, 2016.

    Optical diagnostics
14. 2015

    K. C. Hewitt, J. G. Rad, H. C. McGregor, E. Browers, H. Sapp, M. Short, S. B. Fashir, H. Zeng and I. P. Alwayn. “Accurate assessment of liver steatosis in animal models using a high throughput Raman fiber optic probe.” Analyst, vol. 140, pp. 6602–6609, 2015.

    Optical diagnostics
15. 2015

    L. J. Lucas, C. A. Tellez, M. L. Castilho, C. L. D. Lee, M. A. Hupman, L. S. Vieira, I. Ferreira, L. Raniero and K. C. Hewitt. “Development of a sensitive, stable and EGFR-specific molecular imaging agent for surface enhanced Raman spectroscopy.” Journal of Raman Spectroscopy, vol. 46, pp. 434–446, 2015.

    Optical diagnostics
16. 2015

    L. J. Lucas, X. K. Chen, A. J. Smith, M. Korbelik, H. Zeng, P. W. K. Lee and K. C. Hewitt. “Aggregation of nanoparticles in endosomes and lysosomes produce Surface Enhanced Raman Spectroscopy.” Journal of Nanophotonics, vol. 9, pp. 093094-1–14, 2015.

    Optical diagnosticsMolecular holography
17. 2015

    S. A. Fashir, M. L. Castilho, M. A. Hupman, C. L. D. Lee, L. J. Raniero, I. P. Alwayn and K. C. Hewitt. “EGFR-specific nanoprobe biodistribution in mouse models.” Proc. SPIE, vol. 9531, p. 95310E, 2015.

    Optical diagnostics
18. 2012

    L. Lucas and K. C. Hewitt. “Nanobiophotonics for molecular imaging of cancer: Au- and Ag-based Epidermal Growth Factor receptor (EGFR) specific nanoprobes.” Proc. SPIE, vol. 8234, pp. 82340C-1–15, 2012.

    Optical diagnostics
19. 2012

    L. J. Lucas and K. C. Hewitt. “EGF Conjugated Gold and Silver Nanoparticles for Imaging EGFR Over-expressing Cells.” Nanotechnology, vol. 3, pp. 202–205, 2012.

    Optical diagnostics
20. 2011

    C. Gullekson, L. Lucas, K. C. Hewitt and L. Kreplak. “Surface-sensitive Raman spectroscopy of collagen I fibrils.” Biophysical Journal, vol. 100, no. 7, pp. 1837–1845, 2011.

    Optical diagnostics
21. 2010

    M. Azzouz, K. C. Hewitt and H. Saadaoui. “Dichotomy and pseudogap signature in the Raman response of high-Tc cuprates.” Phys. Rev. B, vol. 81, pp. 174502-1–4, 2010.

    Superconductivity
22. 2010

    M. Saadat, A. E. George and K. C. Hewitt. “Densely mapping the phase diagram of cuprate superconductors using a spatial composition spread approach.” Physica C – Superconductivity and Applications, vol. 470, pp. 559–561, 2010.

    SuperconductivityMaterials & batteries
23. 2009

    L. Lucas, X. K. Chen, A. Smith, M. Korbelik, H. Zeng, P. W. K. Lee and K. C. Hewitt. “Imaging EGFR distribution using surface-enhanced Raman spectroscopy.” Proc. SPIE, vol. 7192, p. 719206, 2009.

    Optical diagnostics
24. 2008

    J. Li, L. Christensen, M. N. Obrovac, K. C. Hewitt and J. R. Dahn. “Effect of heat treatment on Si electrodes using polyvinylidene fluoride binder.” J. Electrochem. Soc., vol. 155, pp. A234–A238, 2008.

    Materials & batteries
25. 2007

    R. J. Sanderson and K. C. Hewitt. “Magnetron sputter deposition of a 48-member cuprate superconductor library: Bi2Sr2Ca1-xYxCu2Oy (0.5 ≤ x ≤ 1) linearly varying in steps of Δx = 0.01.” Appl. Surf. Sci., vol. 254, pp. 760–764, 2007.

    SuperconductivityMaterials & batteries
26. 2006

    K. C. Hewitt. “Nano-Raman spectroscopy: Instrument Design and Techniques.” Physics in Canada, vol. 62, pp. 49–54, 2006.

    Molecular holography
27. 2005

    K. C. Hewitt, P. A. Casey, R. Sun, M. A. White and R. J. Sanderson. “High throughput resistivity apparatus for thin film combinatorial libraries.” Rev. Sci. Instr., vol. 76, p. 093906, 2005.

    Materials & batteries
28. 2005

    R. J. Sanderson and K. C. Hewitt. “Stoichiometry control of magnetron sputtered Bi2Sr2Ca1-xYxCu2Oy (0 ≤ x ≤ 0.5) thin film, composition spread libraries: Substrate bias and gas density factors.” Physica C – Superconductivity, vol. 425, pp. 52–61, 2005.

    SuperconductivityMaterials & batteries
29. 2004

    K. C. Hewitt, X. K. Chen, C. Roch, J. Chrzanowski, J. C. Irwin, E. H. Altendorf, R. Liang, D. Bonn and W. N. Hardy. “Hole concentration and phonon renormalization in Ca-doped YBa2Cu3Oy (6.75 < y < 7.0).” Physical Review B, vol. 69, p. 064514, 2004.

    Superconductivity
30. 2004

    A. Bonakdarpour, K. C. Hewitt, R. L. Turner and J. R. Dahn. “Electrochemical and In Situ XRD Studies of the Li Reaction with combinatorially sputtered Mo1-xSnx (0 < x < 0.5) thin films.” J. Electrochem. Soc., vol. 151, pp. A470–A483, 2004.

    Materials & batteries
31. 2003

    A. Bonakdarpour, K. C. Hewitt, T. D. Hatchard, M. D. Fleischauer and J. R. Dahn. “Combinatorial Synthesis and rapid characterization of Mo1-xSnx (0 < x < 1) thin films.” Thin Solid Films, vol. 440, pp. 11–18, 2003.

    Materials & batteries
32. 2003

    S. D. Beattie, T. Hatchard, A. Bonakdarpour, K. C. Hewitt and J. R. Dahn. “Anomalous, High-Voltage Irreversible Capacity in Tin Electrodes for Lithium Batteries.” Journal of the Electrochemical Society, vol. 150, pp. A701–A705, 2003.

    Materials & batteries
33. 2003

    L. Y. Beaulieu, K. C. Hewitt, R. L. Turner, A. Bonakdarpour, A. A. Abdo, L. Christensen, K. W. Eberman, L. J. Krause and J. R. Dahn. “The electrochemical reaction of Li with amorphous Si-Sn alloys.” Journal of the Electrochemical Society, vol. 150, pp. A149–A156, 2003.

    Materials & batteries
34. 2002

    J. R. Dahn, S. Trussler, T. D. Hatchard, A. Bonakdarpour, J. R. Mueller-Neuhaus, K. C. Hewitt and M. Fleischauer. “Economical Sputtering System to Produce Large-Size Composition-Spread Libraries having Linear and Orthogonal Stoichiometry Variations.” Chemistry of Materials, vol. 14, p. 3519, 2002.

    Materials & batteries
35. 2002

    K. C. Hewitt and J. C. Irwin. “Doping dependence of the Superconducting gap in Bi2Sr2CaCu2O8+δ.” Phys. Rev. B, vol. 66, p. 054516, 2002.

    Superconductivity
36. 2001

    K. C. Hewitt, L. Y. Beaulieu and J. R. Dahn. “InSb as a Li insertion host: Problems & Prospects.” Journal of the Electrochemical Society, vol. 148, p. A402, 2001.

    Materials & batteries
37. 2000

    J. G. Naeini, K. C. Hewitt, J. C. Irwin, T. Sasagawa, Y. Togawa and K. Kishio. “Temperature induced normal state redistribution of B1g spectral weight in underdoped La2-xSrxCuO4.” Physica C, vol. 341, pp. 907–908, 2000.

    Superconductivity
38. 2000

    C. Boulesteix, K. C. Hewitt and J. C. Irwin. “Temperature-induced frequency shift of the Raman-active CuO2 planar oxygen vibrational modes of Bi-2212 related to a change of the Cu-O bonding.” Journal of Physics: Condensed Matter, vol. 12, pp. 9637–9643, 2000.

    Superconductivity
39. 1999

    K. C. Hewitt, N. L. Wang, J. C. Irwin, D. M. Pooke, A. E. Pantoja and H. J. Trodahl. “Isotope shift of the 590 cm−1 feature in underdoped Bi2Sr2CaCu2O8+δ.” Physical Review B, vol. 60, p. R9943, 1999.

    Superconductivity
40. 1998

    J. G. Naeini, X. K. Chen, K. C. Hewitt, J. C. Irwin, T. P. Devereaux, M. Okuya, T. Kimura and K. Kishio. “Evidence for Magnetic pseudoscaling in overdoped La2-xSrxCuO4.” Physical Review B, vol. 57, p. R11077, 1998.

    Superconductivity
41. 1997

    K. C. Hewitt, T. P. Devereaux, X. K. Chen, X-Z. Wang, J. G. Naeini, A. Martin and J. C. Irwin. “Comment on ‘Superconducting Gap Anisotropy vs. Doping level in High-Tc cuprates’.” Physical Review Letters, vol. 78, p. 4891, 1997.

    Superconductivity
42. 1997

    X. K. Chen, J. G. Naeini, K. C. Hewitt, J. C. Irwin, R. Liang and W. N. Hardy. “Electronic Raman scattering in underdoped YBa2Cu3O6.5.” Physical Review B, vol. 56, pp. R513–R516, 1997.

    Superconductivity
43. 1997

    A. Martin, J. A. Sanjuro, K. C. Hewitt, X-Z. Wang, J. C. Irwin and M. J. G. Lee. “Phonon self-energy effects due to superconductivity in Bi2Sr2CaCu2O8+δ.” Physical Review B, vol. 56, p. 8426, 1997.

    Superconductivity
44. 1994

    K. C. Hewitt, X. K. Chen, X. Meng-Burany, A. E. Curzon and J. C. Irwin. “Raman investigation of Pb-substituted Bi2Sr2CuO6+δ.” Physica C – Superconductivity, vol. 251, pp. 192–204, 1994.

    Superconductivity
45. 1993

    K. C. Hewitt, A. Martin, Y. H. Shi and M. J. G. Lee. “Effects of Pb doping on the Raman spectrum of Bi2Sr2CuO6+δ.” Physica C – Superconductivity, vol. 216, pp. 463–470, 1993.

    Superconductivity