Sonia Grego | Scholars@Duke

Sonia Grego
Associate Research Professor in theDepartment of Electrical and Computer Engineering

I am the founding director of the Duke Smart Toilet Lab, dedicated to the opportunities that data-rich human excreta offer to improve individual and public health. The objective is to empower individuals and groups in communal living with health information for early warning of disease, health and wellness and management of chronic diseases through wastewater analysis, without any changes of daily habits. I am passionate about the opportunities that advanced sanitation technologies offer to improve global health and to provide a paradigm shift in health screening both for individuals and for communities.

As a major project of my research portfolio over the past 5 years, I have led the field testing of 10+ onsite sanitation technology prototypes from multiple organizations in international settings. I have managed yearlong deployments of sophisticated chemo-mechanical systems with electronic monitoring connected to wastewater pipes of buildings, ensuring no disruption of service to users while evaluating the treatment process performance.

Current Appointments & Affiliations

Associate Research Professor in theDepartment of Electrical and Computer Engineering, Electrical and Computer Engineering, Pratt School of Engineering 2019

Contact Information

701 W.Main Street, Durham, NC 27708
701 W.Main Street, Durham, NC 27708
sonia.grego@duke.edu (919) 660-5353
Center for Water, Sanitation, Hygiene and Infectious Disease
LinkedIn
Smart Toilet Lab

Background
Education, Training, & Certifications
- Ph.D., University of Copenhagen (Denmark) 1999
- M.S., Università di Pisa (Italy) 1995
Recognition
In the News
- MAY 24, 2021
  
  ’Smart Toilet’ Uses Artificial Intelligence to Monitor Bowel Health
- MAR 4, 2021 Pratt School of Engineering
  
  Comparing the Swab to the Sewer
- FEB 3, 2020 Bass Connections
  
  Smart Toilet Saves Vital Health Data from Getting Flushed
Expertise
Subject Headings
Global Scholarship
- Research
  - India (Country)
  - South Africa (Country)
Research
Selected Grants
- Field Testing in Coimbatore awarded by Bill and Melinda Gates Foundation 2019 - 2023
- COVID Sampler: a wastewater collection technology optimized for pathogen surveillance at the building scale awarded by North Carolina Biotechnology Center 2021 - 2022
- COVID-19 mgLAMP for SARS-CoV-2 Phase 2 - Tansition and Field-testing awarded by California Institute of Technology 2021
- Human-Based Sensor System for Presymptomatic Biological Exposure Detection awarded by Research Triangle Institute International 2019 - 2021
- Sanitation Technology Platform: Accelerating momentum post-Expo (SteP - Phase 3) awarded by Research Triangle Institute International 2019
- Integrated Biogenic Processor and microCHP Utilising SatCom For A Smart, Circular Sanitation Economy awarded by Biomass Controls LLC 2019
External Relationships
- Coprata Inc (formerly Coprata LLC)
Publications & Artistic Works
Selected Publications
- Academic Articles
  - Welling, Claire M., David R. Singleton, Steven B. Haase, Christian H. Browning, Brian R. Stoner, Claudia K. Gunsch, and Sonia Grego. “Predictive values of time-dense SARS-CoV-2 wastewater analysis in university campus buildings. (Accepted)” The Science of the Total Environment 835 (August 2022): 155401. https://doi.org/10.1016/j.scitotenv.2022.155401.
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  - Zhou, J., J. McNabb, N. De Capite, J. R. Ruiz, D. A. Fisher, S. Grego, and K. Chakrabarty. “Stool Image Analysis for Digital Health Monitoring by Smart Toilets.” Ieee Internet of Things Journal, January 1, 2022. https://doi.org/10.1109/JIOT.2022.3158886.
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  - Sasidaran, S., P. Kachoria, A. Raj, S. Ramalingam, B. R. Stoner, K. L. Sellgren, and S. Grego. “Physical properties of menstrual hygiene waste as feedstock for onsite disposal technologies.” Journal of Water Sanitation and Hygiene for Development 11, no. 3 (May 1, 2021): 474–82. https://doi.org/10.2166/washdev.2021.262.
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  - Rosario, Praveen, Ramya Viswash, Thamayanthi Seenivasan, Sudha Ramalingam, Katelyn L. Sellgren, Sonia Grego, and Lena Trotochaud. “Potential Pitfalls in Wastewater Phosphorus Analysis and How to Avoid Them.” Environmental Health Insights 15 (January 2021): 11786302211019218. https://doi.org/10.1177/11786302211019218.
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  - Varigala, Siva, Srinivas Krishnaswamy, Chandra P. Lohia, Meghan Hegarty-Craver, Sonia Grego, Michael Luettgen, and Clement A. Cid. “Optimal design of an electrochemical reactor for blackwater treatment.” Water Environment Research : A Research Publication of the Water Environment Federation 93, no. 1 (January 2021): 148–58. https://doi.org/10.1002/wer.1374.
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  - Russell, Katie N., Edward A. Preble, Meghan Hegarty-Craver, Jacques P. Arrieux, Wesley R. Cole, Y Sammy Choi, Sonia Grego, Kristine Rae Olmsted, and Kristin H. Gilchrist. “Feasibility of Mild Traumatic Brain Injury Assessment Based on Cardiovascular Response to Postural Change.” The Journal of Head Trauma Rehabilitation 35, no. 5 (September 2020): E422–28. https://doi.org/10.1097/htr.0000000000000582.
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  - Welling, Claire M., Siva Varigala, Srinivas Krishnaswamy, Antony Raj, Brendon Lynch, Jeffrey R. Piascik, Brian R. Stoner, et al. “Resolving the relative contributions of cistern and pour flushing to toilet water usage: Measurements from urban test sites in India.” The Science of the Total Environment 730 (August 2020): 138957. https://doi.org/10.1016/j.scitotenv.2020.138957.
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  - Zhou, Jin, Claire M. Welling, Mariana M. Vasquez, Sonia Grego, and Krishnendu Chakrabarty. “Sensor-Array Optimization Based on Time-Series Data Analytics for Sanitation-Related Malodor Detection.” Ieee Transactions on Biomedical Circuits and Systems 14, no. 4 (August 2020): 705–14. https://doi.org/10.1109/tbcas.2020.3002180.
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  - Kawadiya, Siddharth, Claire Welling, Sonia Grego, and Marc A. Deshusses. “Fecal Malodor Detection Using Low-Cost Electrochemical Sensors.” Sensors (Basel, Switzerland) 20, no. 10 (May 20, 2020): E2888. https://doi.org/10.3390/s20102888.
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  - Varigala, S. K., M. Hegarty-Craver, S. Krishnaswamy, P. Madhavan, M. Basil, P. Rosario, A. Raj, et al. “Field testing of an onsite sanitation system on apartment building blackwater using biological treatment and electrochemical disinfection.” Environmental Science: Water Research and Technology 6, no. 5 (May 1, 2020): 1400–1411. https://doi.org/10.1039/c9ew01106d.
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  - Welling, Claire M., Sarani Sasidaran, Prateek Kachoria, Sarah Hennessy, Brendon J. Lynch, Stephanie Teleski, Hitendra Chaudhari, et al. “Field testing of a household-scale onsite blackwater treatment system in Coimbatore, India.” The Science of the Total Environment 713 (April 2020): 136706. https://doi.org/10.1016/j.scitotenv.2020.136706.
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  - Sahondo, Tapuwa, Sarah Hennessy, Rebecca C. Sindall, Hitendra Chaudhari, Stephanie Teleski, Brendon J. Lynch, Katelyn L. Sellgren, Brian R. Stoner, Sonia Grego, and Brian T. Hawkins. “Field testing of a household-scale onsite blackwater treatment system in South Africa.” The Science of the Total Environment 703 (February 2020): 135469. https://doi.org/10.1016/j.scitotenv.2019.135469.
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  - Grego, S., V. Barani, M. Hegarty-Craver, P. Rosario, P. Madhavan, P. Perumal, S. Sasidaran, et al. “Characterization of fecal sludge as biomass feedstock for thermal treatment in the southern Indian state of Tamil Nadu.” Gates Open Research 2 (January 1, 2020). https://doi.org/10.12688/gatesopenres.12870.2.
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  - Heathers, James A. J., Kristin H. Gilchrist, Meghan Hegarty-Craver, Sonia Grego, and Matthew S. Goodwin. “An analysis of stereotypical motor movements and cardiovascular coupling in individuals on the autism spectrum.” Biological Psychology 142 (March 2019): 90–99. https://doi.org/10.1016/j.biopsycho.2019.01.004.
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  - Gilchrist, Kristin H., Meghan Hegarty-Craver, Robert B. Christian, Sonia Grego, Ashley C. Kies, and Anne C. Wheeler. “Automated Detection of Repetitive Motor Behaviors as an Outcome Measurement in Intellectual and Developmental Disabilities.” Journal of Autism and Developmental Disorders 48, no. 5 (May 2018): 1458–66. https://doi.org/10.1007/s10803-017-3408-6.
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  - Amsden, Jason J., Philip J. Herr, David M. W. Landry, William Kim, Raul Vyas, Charles B. Parker, Matthew P. Kirley, et al. “Proof of Concept Coded Aperture Miniature Mass Spectrometer Using a Cycloidal Sector Mass Analyzer, a Carbon Nanotube (CNT) Field Emission Electron Ionization Source, and an Array Detector.” Journal of the American Society for Mass Spectrometry 29, no. 2 (February 2018): 360–72. https://doi.org/10.1007/s13361-017-1820-y.
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  - Grego, Sonia, Viswa Barani, Meghan Hegarty-Craver, Antony Raj, Prasanna Perumal, Adrian B. Berg, and Colleen Archer. “Soil-transmitted helminth eggs assessment in wastewater in an urban area in India.” Journal of Water and Health 16, no. 1 (February 2018): 34–43. https://doi.org/10.2166/wh.2017.147.
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  - Radauscher, E. J., C. B. Parker, K. H. Gilchrist, S. Di Dona, Z. E. Russell, S. D. Hall, J. B. Carlson, et al. “A miniature electron ionization source fabricated using microelectromechanical systems (MEMS) with integrated carbon nanotube (CNT) field emission cathodes and low-temperature co-fired ceramics (LTCC).” International Journal of Mass Spectrometry 422 (November 1, 2017): 162–69. https://doi.org/10.1016/j.ijms.2016.10.021.
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  - Behrsing, Holger, Erin Hill, Hans Raabe, Raymond Tice, Suzanne Fitzpatrick, Robert Devlin, Kent Pinkerton, et al. “In vitro exposure systems and dosimetry assessment tools for inhaled tobacco products: Workshop proceedings, conclusions and paths forward for in vitro model use.” Alternatives to Laboratory Animals : Atla 45, no. 3 (July 2017): 117–58. https://doi.org/10.1177/026119291704500305.
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  - Sellgren, Katelyn L., Brian T. Hawkins, and Sonia Grego. “An optically transparent membrane supports shear stress studies in a three-dimensional microfluidic neurovascular unit model.” Biomicrofluidics 9, no. 6 (November 12, 2015): 061102. https://doi.org/10.1063/1.4935594.
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  - Gilchrist, Kristin H., Gregory F. Lewis, Elaine A. Gay, Katelyn L. Sellgren, and Sonia Grego. “High-throughput cardiac safety evaluation and multi-parameter arrhythmia profiling of cardiomyocytes using microelectrode arrays.” Toxicology and Applied Pharmacology 288, no. 2 (October 2015): 249–57. https://doi.org/10.1016/j.taap.2015.07.024.
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  - Hawkins, Brian T., Sonia Grego, and Katelyn L. Sellgren. “Three-dimensional culture conditions differentially affect astrocyte modulation of brain endothelial barrier function in response to transforming growth factor β1.” Brain Research 1608 (May 2015): 167–76. https://doi.org/10.1016/j.brainres.2015.02.025.
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  - Sellgren, Katelyn L., Elizabeth J. Butala, Brian P. Gilmour, Scott H. Randell, and Sonia Grego. “A biomimetic multicellular model of the airways using primary human cells.” Lab on a Chip 14, no. 17 (September 2014): 3349–58. https://doi.org/10.1039/c4lc00552j.
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  - Gregory, C. W., K. L. Sellgren, K. H. Gilchrist, and S. Grego. “Publisher's Note: "High yield fabrication of multilayer polydimethylsiloxane devices with freestanding micropillar arrays" [Biomicrofluidics 7, 056503 (2013)].” Biomicrofluidics 7, no. 6 (November 1, 2013). https://doi.org/10.1063/1.4829778.
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  - Scobey, Trevor, Boyd L. Yount, Amy C. Sims, Eric F. Donaldson, Sudhakar S. Agnihothram, Vineet D. Menachery, Rachel L. Graham, et al. “Reverse genetics with a full-length infectious cDNA of the Middle East respiratory syndrome coronavirus.” Proceedings of the National Academy of Sciences of the United States of America 110, no. 40 (October 2013): 16157–62. https://doi.org/10.1073/pnas.1311542110.
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  - Gregory, C. W., K. L. Sellgren, K. H. Gilchrist, and S. Grego. “High yield fabrication of multilayer polydimethylsiloxane devices with freestanding micropillar arrays.” Biomicrofluidics 7, no. 5 (September 6, 2013). https://doi.org/10.1063/1.4827600.
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  - Kim, J. Y., M. K. Kwon, L. Vj, S. Grego, and M. Saif Islam. “Postgrowth in situ chlorine passivation for suppressing surface-dominant transport in silicon nanowire devices.” Ieee Transactions on Nanotechnology 11, no. 4 (July 17, 2012): 782–87. https://doi.org/10.1109/TNANO.2012.2197683.
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  - Gilchrist, K. H., D. E. Dausch, and S. Grego. “Electromechanical performance of piezoelectric scanning mirrors for medical endoscopy.” Sensors and Actuators, A: Physical 178 (May 1, 2012): 193–201. https://doi.org/10.1016/j.sna.2012.02.029.
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  - Grego, S., K. H. Gilchrist, J. B. Carlson, and B. R. Stoner. “A compact and multichannel optical biosensor based on a wavelength interrogated input grating coupler.” Sensors and Actuators, B: Chemical 161, no. 1 (January 3, 2012): 721–27. https://doi.org/10.1016/j.snb.2011.11.020.
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  - Grego, S., K. H. Gilchrist, J. Y. Kim, M. K. Kwon, and M. S. Islam. “Nanowire-based devices combining light guiding and photodetection.” Applied Physics A: Materials Science and Processing 105, no. 2 (November 1, 2011): 311–16. https://doi.org/10.1007/s00339-011-6623-6.
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  - Vj, L., J. Oh, A. P. Nayak, A. M. Katzenmeyer, K. H. Gilchrist, S. Grego, N. P. Kobayashi, et al. “A perspective on nanowire photodetectors: Current status, future challenges, and opportunities.” Ieee Journal on Selected Topics in Quantum Electronics 17, no. 4 (July 1, 2011): 1002–32. https://doi.org/10.1109/JSTQE.2010.2093508.
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  - Melvin, E. M., B. R. Moore, K. H. Gilchrist, S. Grego, and O. D. Velev. “On-chip collection of particles and cells by AC electroosmotic pumping and dielectrophoresis using asymmetric microelectrodes.” Biomicrofluidics 5, no. 3 (January 1, 2011). https://doi.org/10.1063/1.3620419.
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  - Grego, S., A. Huffman, M. Lueck, B. R. Stoner, and J. Lannon. “Nanoimprint lithography fabrication of waveguide-integrated optical gratings with inexpensive stamps.” Microelectronic Engineering 87, no. 10 (January 1, 2010): 1846–51. https://doi.org/10.1016/j.mee.2009.11.003.
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  - Gilchrist, K. H., R. P. McNabb, J. A. Izatt, and S. Grego. “Piezoelectric scanning mirrors for endoscopic optical coherence tomography.” Journal of Micromechanics and Microengineering 19, no. 9 (November 9, 2009). https://doi.org/10.1088/0960-1317/19/9/095012.
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  - Piascik, J. R., E. J. Swift, J. Y. Thompson, S. Grego, and B. R. Stoner. “Surface modification for enhanced silanation of zirconia ceramics.” Dental Materials : Official Publication of the Academy of Dental Materials 25, no. 9 (September 2009): 1116–21. https://doi.org/10.1016/j.dental.2009.03.008.
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  - Grego, S., J. R. McDaniel, and B. R. Stoner. “Wavelength interrogation of grating-based optical biosensors in the input coupler configuration.” Sensors and Actuators, B: Chemical 131, no. 2 (May 14, 2008): 347–55. https://doi.org/10.1016/j.snb.2007.11.053.
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  - Bhagat, S. K., H. Han, Y. Zoo, J. Lewis, S. Grego, K. Lee, S. Iyer, and T. L. Alford. “Effects of deposition parameters on the electrical and mechanical properties of indium tin oxide films on polyethylene napthalate substrates deposited by radio frequency magnetron sputtering.” Thin Solid Films 516, no. 12 (April 30, 2008): 4064–69. https://doi.org/10.1016/j.tsf.2007.12.146.
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  - Grego, S., J. Lewis, E. Vick, and D. Temple. “A method to evaluate mechanical performance of thin transparent films for flexible displays.” Thin Solid Films 515, no. 11 (April 9, 2007): 4745–52. https://doi.org/10.1016/j.tsf.2006.11.034.
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  - Lamvik, M., and S. Grego. “A multiaxis stage configured for rapid observations of plane samples at multiple angles.” Review of Scientific Instruments 76, no. 12 (December 1, 2005): 1–3. https://doi.org/10.1063/1.2140444.
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  - Bhatt, K. H., S. Grego, and O. D. Velev. “An AC electrokinetic technique for collection and concentration of particles and cells on patterned electrodes.” Langmuir 21, no. 14 (July 5, 2005): 6603–12. https://doi.org/10.1021/la050658w.
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  - Grego, S., J. Lewis, E. Vick, and D. Temple. “Development and evaluation of bend-testing techniques for flexible-display applications.” Journal of the Society for Information Display 13, no. 7 (July 1, 2005): 575–81. https://doi.org/10.1889/1.2001215.
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  - Grego, Sonia, Thomas W. Jarvis, Brian R. Stoner, and Jay S. Lewis. “Template-directed assembly on an ordered microsphere array.” Langmuir : The Acs Journal of Surfaces and Colloids 21, no. 11 (May 2005): 4971–75. https://doi.org/10.1021/la0468850.
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  - Lewis, J., S. Grego, B. Chalamala, E. Vick, and D. Temple. “Highly flexible transparent electrodes for organic light-emitting diode-based displays.” Applied Physics Letters 85, no. 16 (October 18, 2004): 3450–52. https://doi.org/10.1063/1.1806559.
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  - Foulger, S. H., P. Jiang, A. Lattam, D. W. Smith, J. Ballato, D. E. Dausch, S. Grego, and B. R. Stoner. “Photonic crystal composites with reversible high-frequency stop band shifts.” Advanced Materials 15, no. 9 (May 2, 2003): 685–89. https://doi.org/10.1002/adma.200304566.
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  - Oddershede, Lene, Jakob Kisbye Dreyer, Sonia Grego, Stanley Brown, and Kirstine Berg-Sørensen. “The motion of a single molecule, the lambda-receptor, in the bacterial outer membrane.” Biophysical Journal 83, no. 6 (December 2002): 3152–61. https://doi.org/10.1016/s0006-3495(02)75318-6.
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  - Tirnauer, Jennifer S., Sonia Grego, E. D. Salmon, and Timothy J. Mitchison. “EB1-microtubule interactions in Xenopus egg extracts: role of EB1 in microtubule stabilization and mechanisms of targeting to microtubules.” Molecular Biology of the Cell 13, no. 10 (October 2002): 3614–26. https://doi.org/10.1091/mbc.02-04-0210.
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  - Dowek, D., I. Reiser, S. Grego, N. Andersen, A. Dubois, J. C. Houver, S. E. Nielsen, et al. “P-state-to-P-state transitions in optically prepared atomic collisions: III. A complete analysis of Li⁺ + Na(3p) → Li(2p) + Na⁺ differential scattering.” Journal of Physics B: Atomic, Molecular and Optical Physics 35, no. 9 (May 14, 2002): 2051–68. https://doi.org/10.1088/0953-4075/35/9/304.
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  - Grego, S., J. Salgado, P. Borel, S. E. Nielsen, and N. Andersen. “P-state-to-P-state transitions in optically prepared atomic collisions: II. Alignment propensity for Na(3p) → Li(2p) electron transfer.” Journal of Physics B: Atomic, Molecular and Optical Physics 35, no. 9 (May 14, 2002): 2035–50. https://doi.org/10.1088/0953-4075/35/9/303.
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  - Sidky, E. Y., S. Grego, D. Dowek, and N. Andersen. “P-state-to-P-state transitions in optically prepared atomic collisions: I. Theory of measurement in terms of Stokes parameters.” Journal of Physics B: Atomic, Molecular and Optical Physics 35, no. 9 (May 14, 2002): 2005–33. https://doi.org/10.1088/0953-4075/35/9/302.
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  - Oddershede, L., S. Grego, S. F. Nørrelykke, and K. Berg-Sørensen. “Optical tweezers: Probing biological surfaces.” Probe Microscopy 2, no. 2 (December 1, 2001): 129–37.
  - Grego, S., V. Cantillana, and E. D. Salmon. “Microtubule treadmilling in vitro investigated by fluorescence speckle and confocal microscopy.” Biophysical Journal 81, no. 1 (July 2001): 66–78. https://doi.org/10.1016/s0006-3495(01)75680-9.
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  - Grego, S., J. Salgado, J. W. Thomsen, M. Machholm, S. E. Nielsen, and N. Andersen. “Final state alignment for Li⁺ + Na(3s) → Li (2p) + Na⁺ electron transfer.” Journal of Physics B: Atomic, Molecular and Optical Physics 31, no. 15 (August 14, 1998): 3419–28. https://doi.org/10.1088/0953-4075/31/15/013.
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  - Grego, S., E. Arimondo, and C. Frediani. “Optical tweezers based on near infrared diode laser.” Journal of Biomedical Optics 2, no. 3 (January 1, 1997): 332–39. https://doi.org/10.1117/12.275449.
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  - Grego, S., M. Colla, A. Fioretti, J. H. Müller, P. Verkerk, and E. Arimondo. “A cesium magneto-optical trap for cold collisions studies.” Optics Communications 132, no. 5–6 (December 15, 1996): 519–26. https://doi.org/10.1016/0030-4018(96)00417-8.
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- Conference Papers
  - Zhou, J., C. M. Welling, S. Kawadiya, M. A. Deshusses, S. Grego, and K. Chakrabarty. “Sensor-Array optimization based on mutual information for sanitation-related malodor alerts.” In Biocas 2019 Biomedical Circuits and Systems Conference, Proceedings, 2019. https://doi.org/10.1109/BIOCAS.2019.8919132.
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  - Grego, Sonia, Edward R. Dougherty, Francis J. Alexander, Scott S. Auerbach, Brian R. Berridge, Michael L. Bittner, Warren Casey, et al. “Systems biology for organotypic cell cultures.” In Altex, 34:301–10, 2017. https://doi.org/10.14573/altex.1608221.
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  - Grego, S., K. H. Gilchrist, and B. R. Stoner. “Tunable wavelength interrogated sensor platform (TWIST) for point-of-care diagnostics of infectious diseases.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 8029, 2011. https://doi.org/10.1117/12.886880.
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  - Kim, J. Y., M. K. Kwon, V. J. Logeeswaran, S. Grego, and M. S. Islam. “In-situ chlorine passivation to suppress surface-dominant transport in silicon nanowire devices.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 7768, 2010. https://doi.org/10.1117/12.861607.
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  - Grego, S., K. H. Gilchrist, J. Y. Kim, M. K. Kwon, and M. S. Islam. “Waveguide-integrated nanowire photoconductors on a non-single crystal surface.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 7406, 2009. https://doi.org/10.1117/12.825260.
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  - Bandaru, P. R., S. Grego, and I. Kinloch. “Materials Research Society Symposium Proceedings: Preface.” In Materials Research Society Symposium Proceedings, Vol. 1142, 2009.
  - Grego, S., and B. R. Stoner. “Wavelength interrogation of optical waveguide biosensors in the input grating coupler configuration.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 7218, 2009. https://doi.org/10.1117/12.808428.
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  - Lannon, J., S. Grego, and S. Solomon. “Multicolor IR emissive pixels.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 6544, 2007. https://doi.org/10.1117/12.727588.
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  - Grego, S., C. Yang, C. A. Bower, B. R. Stoner, and T. J. Suleski. “Optical waveguide biosensor based on two-dimensional diffractive elements obtained by nano-imprint lithography.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 6475, 2007. https://doi.org/10.1117/12.700616.
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  - Bhagat, S., Y. Zoo, H. Han, J. Lewis, S. Grego, K. Lee, S. Iyer, and T. L. Alford. “Mechanical properties of indium tin oxide on polyethylene napthalate substrate.” In Materials Research Society Symposium Proceedings, 1012:401–6, 2007. https://doi.org/10.1557/proc-1012-y12-21.
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  - Grego, S., A. M. Patel, B. R. Stoner, Y. Cao, and T. J. Suleski. “Novel grating-based optical waveguide device for sensor applications.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 6218, 2006. https://doi.org/10.1117/12.665504.
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  - Grego, S., S. Naskar, A. M. Patel, A. Huffman, C. A. Bower, and B. R. Stoner. “Novel optical-waveguide sensing platform based on input grating coupler.” In Proceedings of Spie the International Society for Optical Engineering, Vol. 6123, 2006. https://doi.org/10.1117/12.646302.
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  - Lamvik, M., and S. Grego. “Plano-eucentric photometry system for micro-display metrology.” In Digest of Technical Papers Sid International Symposium, 36:542–45, 2005. https://doi.org/10.1889/1.2036495.
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  - Lewis, J. S., S. Grego, E. Vick, and D. Temple. “Evaluating and improving mechanical performance of thin films for flexible displays.” In Proceedings of Spie the International Society for Optical Engineering, 5801:249–60, 2005. https://doi.org/10.1117/12.600717.
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  - Grego, S., J. Lewis, E. Vick, B. Chalamala, and D. Temple. “Mechanical evaluation of permeation barriers for flexible OLED displays.” In Conference Proceedings Lasers and Electro Optics Society Annual Meeting Leos, 1:340–41, 2004.
  - Lamvik, M., S. Grego, R. Labennett, and D. Temple. “Polymer light guide arrays for tiling large-scale displays.” In Proceedings of Spie the International Society for Optical Engineering, 5443:196–204, 2004. https://doi.org/10.1117/12.561286.
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  - Grego, S., T. Jarvis, B. Stoner, and J. Lewis. “Investigation of the layer-by-layer assembly of colloid crystals on a templated substrate.” In Materials Research Society Symposium Proceedings, 820:345–50, 2004. https://doi.org/10.1557/proc-820-r5.4.
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  - Lewis, J., S. Grego, E. Vick, B. Chalamala, and D. Temple. “Mechanical performance of thin films in flexible displays.” In Materials Research Society Symposium Proceedings, 814:189–98, 2004. https://doi.org/10.1557/proc-814-i8.5.
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  - Lamvik, M., S. Grego, E. Martin, and D. Fox. “Methods of automatic seamless tiling for rapid deployment of projection displays.” In Proceedings of Spie the International Society for Optical Engineering, 5080:272–79, 2003. https://doi.org/10.1117/12.500956.
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  - Lamvik, M., S. Grego, E. Martin, and D. Fox. “Rapid automatic alignment of a tiled digital projection system.” In Proceedings of Spie the International Society for Optical Engineering, 5002:7–14, 2003. https://doi.org/10.1117/12.473853.
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  - Foulger, S. H., A. C. Lattam, P. Jiang, J. Ballato, D. E. Dausch, S. Grego, and B. R. Stoner. “Integration of photonic bandgap composites with piezoelectric actuators for rejection wavelength tuning.” In Proceedings of Spie the International Society for Optical Engineering, 4809:40–50, 2002. https://doi.org/10.1117/12.451667.
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  - Frediani, C., S. Grego, L. Guidoni, and E. Arimondo. “Compact microscope-based 850-nm optical tweezers.” In Proceedings of Spie the International Society for Optical Engineering, 2629:56–61, 1996.
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- Bass Connections Team Leader. Smart Toilet: A Disruptive Technology to Improve Health and Wellness. 2020 - 2021 2020 - 2021
- Bass Connections Team Leader. Smart Toilet: A Disruptive Technology to Improve Health and Wellness. 2019 - 2020 2019 - 2020

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