Education and Experience

Apple

Display Hardware Engineer (2022-present)

PARC, a Xerox company

Area manager (Sensor Devices and Systems area) (2020-2022), Member of Research Staff (2018-2020), Post-doctoral Researcher (2017-2018)
As leader of the Sensor Devices and Systems group at PARC, I work to develop next-generation sensors and sensor systems for use across multiple industries. I have led and contributed to research projects in the areas of chemical and bio-sensing, wireless and low-power sensors, energy storage, and printed electronics.

University of California, Berkeley

Ph.D. in Physical Chemistry (2012-2016)
As a graduate student, I developed and studied the mechanism for a new class of reactions for controlling nanocrystal surface chemistry, developed a new class of size-selective membranes for non-aqueous batteries, and studied the electrochemistry of redox-mediators for the electro-deposition of non-conductive energy storage materials. In each of these projects, I applied materials science and electrochemistry to solving applied problems in the fields of energy storage and conversion.
Co-advised by: Dr. Brett A. Helms (LBNL) and Prof. Omar Yaghi (UC Berkeley)
Selected Coursework: Statistical Mechanics, Materials Chemistry, and Surface Properties of Materials
Teaching: Organic chemistry laboratory (Chem 3AL), 3 semesters, 2012-2015

University of North Carolina at Chapel Hill

Bachelor of Science in Chemistry with Highest Distinction (2008-2012)
Advised by: Prof. Royce Murray. GPA: 3.92 cumulative, 3.95 chemistry.
Selected Coursework: Electroanalytical Chemistry, Separations, and Mechanisms of Organic and Inorganic Reactions.
Teaching: Volunteer chemistry tutor (Chemistry Resource Center), 2 semesters, 2010-2011

Skills

  • Electroanalytical techniques

    Cyclic voltammetry, chronoamperometry, rotating ring-disk electrode experiments, electrochemical impedance spectroscopy, and battery cycling (galvanostatic and potentiostatic)

  • Synthesis

    Common organic, inorganic, and nanocrystal synthesis procedures, including oxygen and moisture-free atmosphere procedures (Schlenk and glove box techniques)

  • Separations

    High pressure liquid chromatography (HPLC), capillary electrophoresis (CE), and gas chromatography-mass spectrometry (GC-MS)

  • Computation

    Proficient in Python for data analysis and lab automation, including version control (Git), environment management (conda, virtual environments), reproducible analysis environments/pipelines in Docker, GUI programming with Qt, and use of standard analysis libraries (pandas, numpy, scipy, matplotlib, plotly, scikit-learn, Jupyter)

  • Imaging

    Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Atomic Force Microscopy (AFM)

  • Spectroscopy

    Experienced with Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), UV-Vis, FT-IR, and NMR spectroscopies (including advanced 2D NMR techniques)

  • Materials Characterization

    Thermogravimetric analysis, dynamic light scattering, zeta potential measurements, powder X-ray diffraction, Grazing Incidence Small Angle X-ray Scattering (GISAXS)

Publications

10 peer-reviewed publications in leading journals

10. A. Pierre, S.E. Doris, R. Lujan, R.A. Street, Monolithic Integration of Ion‐Selective Organic Electrochemical Transistors with Thin Film Transistors on Flexible Substrates Adv. Mater. Technol. 2019, 4, 1800577

9. S.E. Doris, A. Pierre, R.A. Street, Dynamic and Tunable Threshold Voltage in Organic Electrochemical Transistors Adv. Mater. 2018, 30, 1706757

8. A.L. Ward, S.E. Doris, L. Li, M.A. Hughes, X. Qu, K.A. Persson, B.A. Helms, Materials Genomics Screens for Adaptive Ion Transport Behavior by Redox-Switchable Microporous Polymer Membranes in Lithium–Sulfur Batteries ACS Cent. Sci. 2017, 3, pp. 399–406.

7. S.E. Doris, A.L. Ward, A. Baskin, P.D. Frischmann, N. Gavvalapalli, E. Chénard, C.S. Sevov, D. Prendergast, J.S. Moore, B.A. Helms, "Macromolecular Design Strategies for Preventing Active-Material Crossover in Non-Aqueous All-Organic Redox-Flow Batteries" Angew. Chem. Int. Ed. 2017, 56, pp. 1595–1599.

6. S.E. Doris, A.L. Ward, P.D. Frischmann, L. Li, B.A. Helms, “Understanding and controlling the chemical evolution and polysulfide-blocking ability of lithium–sulfur battery membranes cast from polymers of intrinsic microporosity” J. Mater. Chem. A 2016, 4, pp. 16946–16952.

5. L.C.H. Gerber, P.D. Frischmann, F.Y. Fan, S.E. Doris, X. Qu, A.M. Scheuermann, K. Persson, Y.-M. Chiang, B.A. Helms, “Three-Dimensional Growth of Li2S in Lithium-Sulfur Batteries Promoted by a Redox Mediator” Nano Lett. 2016, 16 (1), pp. 549–554.

4. P.D. Frischmann, L.C.H. Gerber, S.E. Doris, E.Y. Tsai, F.Y. Fan, X. Qu, A. Jain, K.A. Persson, Y.-M. Chiang, B.A. Helms, “Supramolecular Perylene Bisimide-Polysulfide Gel Networks as Nanostructured Redox Mediators in Dissolved Polysulfide Lithium-Sulfur Batteries” Chem. Mater. 2015, 25 (19), pp. 6765–6770.

3. C. Li, A.L. Ward, S.E. Doris, T.A. Pascal, D. Prendergast, B.A. Helms, “Polysulfide-Blocking Microporous Polymer Membrane Tailored for Hybrid Li-Sulfur Flow Batteries” Nano Lett. 2015, 15 (9), pp. 5724–5729.

2. E.L. Rosen, K. Gilmore, A.M. Sawvel, A.T. Hammack, S.E. Doris, S. Aloni, V. Altoe, D. Nordlund, T.-C. Weng, D. Sokaras, B.E. Cohen, J.J. Urban, D.F. Ogletree, D.J. Milliron, D. Prendergast, B.A. Helms, “Chemically Directing d-Block Heterometallics to Nanocrystal Surfaces as Molecular Beacons of Surface Structure” Chem. Sci. 2015, 6, pp. 6295–6304.

1. S.E. Doris, J.J. Lynch, C. Li, A.W. Wills, J.J Urban, B.A. Helms, “Mechanistic Insight into the Formation of Cationic Naked Nanocrystals Generated under Equilibrium Control” J. Am. Chem. Soc. 2014, 136 (44), pp. 15702–15710.

Patents

10. D. Desai, J.L.B. Rivest, G. Iftime, V. Vedharathinam, M. Chintapalli, J. Wei, S.E. Doris, "System and method for adjusting carbon dioxide concentration in indoor atmospheres." US Patent 11,207,640 B2, December 28, 2021.

9. A. Pierre, S.E. Doris, D.E. Schwartz, "Printed hygroscopic electrodes for low-cost capacitive relative humidity sensors." US Patent 11,143,615 B2, October 12, 2021.

8. S.E. Doris, W.B. Jackson, A. Pierre, "Current control systems and methods." US Patent 10,971,765 B2, April 6, 2021.

7. W.B. Jackson, K.A. Evans, S.E. Doris, "Control of particle layer depth and thickness during powder printing." US Patent 10,814,649 B2, October 27, 2020.

6. A. Pierre, S.E. Doris, R.A. Street, "High sensitivity ion selective sensors implemented through feedback circuitry." US Patent 10,794,855 B2, October 6, 2020.

5. B.A. Helms, P.D. Frischmann, Y.-M. Chiang, F.Y. Fan, S.E. Doris, L.C.H. Gerber, "Redox mediators for metal-sulfur batteries." US Patent 10,727,488 B2, July 28, 2020.

4. B.A. Helms, C. Li, A. Ward, S.E. Doris, P.D. Frischmann, "Polymeric materials for electrochemical cells and ion separation processes ." US Patent 10,710,065 B2, July 14, 2020.

3. S.E. Doris, W. Jackson, N. Chopra, B. Rupp, R.A. Street, "Chemical reactors systems and methods for multi-phase reactions ." US Patent 10,589,248 B1, March 17, 2020.

2. S.E. Doris, A. Pierre, "Organic electrochemical transistors with tunable threshold voltage." US Patent 10,424,751 B2, September 24, 2019.

1. S.E. Doris, "Electrochemical clock and oscillator devices." US Patent 10,135,015 B1, November 20, 2018.