School of Humanities and Sciences


Showing 1-23 of 23 Results

  • Hongjie Dai

    Hongjie Dai

    The J.G. Jackson and C.J. Wood Professor of Chemistry

    BioProfessor Dai’s research spans chemistry, physics, and materials and biomedical sciences, leading to materials with properties useful in electronics, energy storage and biomedicine. Recent developments include near-infrared-II fluorescence imaging, ultra-sensitive diagnostic assays, a fast-charging aluminum battery and inexpensive electrocatalysts that split water into oxygen and hydrogen fuels.

    Born in 1966 in Shaoyang, China, Hongjie Dai began his formal studies in physics at Tsinghua U. (B.S. 1989) and applied sciences at Columbia U. (M.S. 1991). He obtained his Ph.D. from Harvard U and performed postdoctoral research with Dr. Richard Smalley. He joined the Stanford faculty in 1997, and in 2007 was named Jackson–Wood Professor of Chemistry. Among many awards, he has been recognized with the ACS Pure Chemistry Award, APS McGroddy Prize for New Materials, Julius Springer Prize for Applied Physics and Materials Research Society Mid-Career Award. He has been elected to the American Academy of Arts and Sciences, National Academy of Sciences (NAS), National Academy of Medicine (NAM) and Foreign Member of Chinese Academy of Sciences.

    The Dai Laboratory has advanced the synthesis and basic understanding of carbon nanomaterials and applications in nanoelectronics, nanomedicine, energy storage and electrocatalysis.

    Nanomaterials
    The Dai Lab pioneered some of the now-widespread uses of chemical vapor deposition for carbon nanotube (CNT) growth, including vertically aligned nanotubes and patterned growth of single-walled CNTs on wafer substrates, facilitating fundamental studies of their intrinsic properties. The group developed the synthesis of graphene nanoribbons, and of nanocrystals and nanoparticles on CNTs and graphene with controlled degrees of oxidation, producing a class of strongly coupled hybrid materials with advanced properties for electrochemistry, electrocatalysis and photocatalysis. The lab’s synthesis of a novel plasmonic gold film has enhanced near-infrared fluorescence up to 100-fold, enabling ultra-sensitive assays of disease biomarkers.

    Nanoscale Physics and Electronics
    High quality nanotubes from his group’s synthesis are widely used to investigate the electrical, mechanical, optical, electro-mechanical and thermal properties of quasi-one-dimensional systems. Lab members have studied ballistic electron transport in nanotubes and demonstrated nanotube-based nanosensors, Pd ohmic contacts and ballistic field effect transistors with integrated high-kappa dielectrics.

    Nanomedicine and NIR-II Imaging
    Advancing biological research with CNTs and nano-graphene, group members have developed π–π stacking non-covalent functionalization chemistry, molecular cellular delivery (drugs, proteins and siRNA), in vivo anti-cancer drug delivery and in vivo photothermal ablation of cancer. Using nanotubes as novel contrast agents, lab collaborations have developed in vitro and in vivo Raman, photoacoustic and fluorescence imaging. Lab members have exploited the physics of reduced light scattering in the near-infrared-II (1000-1700nm) window and pioneered NIR-II fluorescence imaging to increase tissue penetration depth in vivo. Video-rate NIR-II imaging can measure blood flow in single vessels in real time. The lab has developed novel NIR-II fluorescence agents, including CNTs, quantum dots, conjugated polymers and small organic dyes with promise for clinical translation.

    Electrocatalysis and Batteries
    The Dai group’s nanocarbon–inorganic particle hybrid materials have opened new directions in energy research. Advances include electrocatalysts for oxygen reduction and water splitting catalysts including NiFe layered-double-hydroxide for oxygen evolution. Recently, the group also demonstrated an aluminum ion battery with graphite cathodes and ionic liquid electrolytes, a substantial breakthrough in battery science.

  • Gretchen C. Daily

    Gretchen C. Daily

    Bing Professor of Environmental Science and Senior Fellow at the Woods Institute for the Environment

    Current Research and Scholarly InterestsLand use, biodiversity dynamics, ecosystem services

  • Laura M.K. Dassama

    Laura M.K. Dassama

    Assistant Professor of Chemistry

    BioLaura Dassama is a chemical biologist who uses principles from chemistry and physics to understand complex biological phenomenal, and to leverage that understanding for the modulation of biological processes. Her current research focuses on deciphering the molecular recognition mechanisms of multidrug transporters implicated in drug resistance, rational engineering and repurposing of natural products, and control of transcription factors relevant to sickle cell disease.

  • Giulio De Leo

    Giulio De Leo

    Professor of Biology and Senior Fellow at the Woods Institute for the Environment

    Current Research and Scholarly InterestsI am a theoretical ecologist mostly interested in investigating factors and processes driving the dynamics of natural and harvested populations and on how to use this knowledge to inform practical management. I have worked broadly on life histories analysis, fishery management, dynamics and control of infectious diseases and environmental impact assessment.

  • Joseph M. DeSimone

    Joseph M. DeSimone

    Sanjiv Sam Gambhir Professor of Translational Medicine, Professor of Chemical Engineering and, by courtesy, of Chemistry, of Materials Science and Engineering, and of Operations, Information and Technology at the Graduate School of Business

    BioJoseph M. DeSimone is the Sanjiv Sam Gambhir Professor of Translational Medicine and Chemical Engineering at Stanford University. He holds appointments in the Departments of Radiology and Chemical Engineering with courtesy appointments in the Department of Chemistry and in Stanford’s Graduate School of Business.

    The DeSimone laboratory's research efforts are focused on developing innovative, interdisciplinary solutions to complex problems centered around advanced polymer 3D fabrication methods. In Chemical Engineering and Materials Science, the lab is pursuing new capabilities in digital 3D printing, as well as the synthesis of new polymers for use in advanced additive technologies. In Translational Medicine, research is focused on exploiting 3D digital fabrication tools to engineer new vaccine platforms, enhanced drug delivery approaches, and improved medical devices for numerous conditions, with a current major focus in pediatrics. Complementing these research areas, the DeSimone group has a third focus in Entrepreneurship, Digital Transformation, and Manufacturing.

    Before joining Stanford in 2020, DeSimone was a professor of chemistry at the University of North Carolina at Chapel Hill and of chemical engineering at North Carolina State University. He is also Co-founder, Board Chair, and former CEO (2014 - 2019) of the additive manufacturing company, Carbon. DeSimone is responsible for numerous breakthroughs in his career in areas including green chemistry, medical devices, nanomedicine, and 3D printing. He has published over 350 scientific articles and is a named inventor on over 200 issued patents. Additionally, he has mentored 80 students through Ph.D. completion in his career, half of whom are women and members of underrepresented groups in STEM.

    In 2016 DeSimone was recognized by President Barack Obama with the National Medal of Technology and Innovation, the highest U.S. honor for achievement and leadership in advancing technological progress. He has received numerous other major awards in his career, including the U.S. Presidential Green Chemistry Challenge Award (1997); the American Chemical Society Award for Creative Invention (2005); the Lemelson-MIT Prize (2008); the NIH Director’s Pioneer Award (2009); the AAAS Mentor Award (2010); the Heinz Award for Technology, the Economy and Employment (2017); the Wilhelm Exner Medal (2019); the EY Entrepreneur of the Year Award (2019 U.S. Overall National Winner); and the Harvey Prize in Science and Technology (2020). He is one of only 25 individuals elected to all three branches of the U.S. National Academies (Sciences, Medicine, Engineering). DeSimone received his B.S. in Chemistry in 1986 from Ursinus College and his Ph.D. in Chemistry in 1990 from Virginia Tech.

  • Persi Diaconis

    Persi Diaconis

    Mary V. Sunseri Professor in the School of Humanities and Sciences and Professor of Mathematics

    Current Research and Scholarly InterestsResearch Interests:
    PROBABILITY THEORY
    BAYESIAN STATISTICS
    STATISTICAL COMPUTING
    COMBINATORICS

  • Savas Dimopoulos

    Savas Dimopoulos

    Hamamoto Family Professor

    BioWhat is the origin of mass? Are there other universes with different physical laws?

    Professor Dimopoulos has been searching for answers to some of the deepest mysteries of nature. Why is gravity so weak? Do elementary particles have substructure? What is the origin of mass? Are there new dimensions? Can we produce black holes in the lab?

    Elementary particle physics is entering a spectacular new era in which experiments at the Large Hadron Collider at CERN will soon shed light on such questions and lead to a new deeper theory of particle physics, replacing the Standard Model proposed forty years ago. The two leading candidates for new theories are the Supersymmetric Standard Model and theories with Large Extra Dimensions, both proposed by Professor Dimopoulos and collaborators.

    Professor Dimopoulos is collaborating on a number of experiments that use the dramatic advances in atom interferometry to do fundamental physics. These include testing Einstein’s theory of general relativity to fifteen decimal precision, atom neutrality to thirty decimals, and looking for modifications of quantum mechanics. He is also designing an atom-interferometric gravity-wave detector that will allow us to look at the universe with gravity waves instead of light, marking the dawn of gravity wave astronomy and cosmology.

  • Jose R. Dinneny

    Jose R. Dinneny

    Associate Professor of Biology

    Current Research and Scholarly InterestsThe biology of root systems is governed by both micro-scale and systemic signaling that allows the plant to integrate these complex variables into growth and branching decisions that ultimately determine the efficiency resources are captured. Research in my lab is aimed at understanding the response of roots to water-limiting conditions and is exploring this process at different organizational scales from the individual cell type to the level of the whole plant.

  • Rodolfo Dirzo

    Rodolfo Dirzo

    Bing Prof in Environmental Science and Senior Fellow at the Woods Institute for the Environment

    Current Research and Scholarly InterestsEcological and evolutionary aspects of plant-animal interactions, largely but not exclusively, in tropical forest ecosystems.
    Conservation biology in tropical ecosystems.
    Studies on biodiversity.
    Education, at all levels, on scientific practice, ecology and biodiversity conservation.

  • Scott Dixon

    Scott Dixon

    Associate Professor of Biology

    Current Research and Scholarly InterestsMy lab is interested in the relationship between cell death and metabolism. Using techniques drawn from many disciplines my laboratory is investigating how perturbation of intracellular metabolic networks can result in novel forms of cell death, such as ferroptosis. We are interested in applying this knowledge to find new ways to treat diseases characterized by insufficient (e.g. cancer) or excessive (e.g. neurodegeneration) cell death.

  • Sebastian Doniach

    Sebastian Doniach

    Professor of Applied Physics and of Physics, Emeritus

    Current Research and Scholarly InterestsStudy of changes in conformation of proteins and RNA using x-ray scattering

  • David Donoho

    David Donoho

    Anne T. and Robert M. Bass Professor in the School of Humanities and Sciences

    BioDavid Donoho is a mathematician who has made fundamental contributions to theoretical and computational statistics, as well as to signal processing and harmonic analysis. His algorithms have contributed significantly to our understanding of the maximum entropy principle, of the structure of robust procedures, and of sparse data description.

    Research Statement:
    My theoretical research interests have focused on the mathematics of statistical inference and on theoretical questions arising in applying harmonic analysis to various applied problems. My applied research interests have ranged from data visualization to various problems in scientific signal processing, image processing, and inverse problems.

  • Persis Drell

    Persis Drell

    Provost, James and Anna Marie Spilker Professor and Professor in the School of Engineering, Professor of Materials Science and Engineering and Professor of Physics

    BioPersis Drell, Provost

    Drell is a physicist who has served on the Stanford faculty since 2002. She is the James and Anna Marie Spilker Professor in the School of Engineering, a professor of materials science and engineering, and a professor of physics. She is the former dean of the Stanford School of Engineering and the former director of the U.S. Department of Energy’s SLAC National Accelerator Laboratory at Stanford.

    Drell received her bachelor’s degree in mathematics and physics from Wellesley College in 1977, followed by a PhD in atomic physics from the University of California, Berkeley, in 1983. She then switched to high-energy experimental physics and worked as a postdoctoral scientist at the Lawrence Berkeley National Laboratory. She joined the physics faculty at Cornell University in 1988.

    In 2002, Drell joined the Stanford faculty as a professor and director of research at SLAC. In her early years at SLAC, she worked on the construction of the Fermi Gamma-ray Space Telescope. In 2005, she became SLAC’s deputy director and was named director two years later. She led the 1,600-employee SLAC National Accelerator Laboratory until 2012. Drell is credited with helping broaden the focus of the laboratory, increasing collaborations between SLAC and the main Stanford campus, and overseeing transformational projects.

    During Drell’s tenure as director, SLAC transitioned from being a laboratory dedicated primarily to research in high-energy physics to one that is now seen as a leader in a number of scientific disciplines. In 2010, the laboratory began operations of the Linac Coherent Light Source (LCLS). LCLS is the world’s most powerful X-ray free electron laser, which is revolutionizing study of the atomic and molecular world. LCLS is used to conduct scientific research and drive applications in energy and environmental sciences, drug development, and materials engineering.

    After serving as the director of SLAC, Drell returned to the Stanford faculty, focusing her research on technology development for free electron lasers and particle astrophysics. Drell was named the dean of the Stanford School of Engineering in 2014.

    As dean of the School of Engineering, Drell catalyzed a collaborative school-wide process, known as the SoE-Future process, to explore the realms of possibility for the future of the School of Engineering and engineering education and research. The process engaged a broad group of stakeholders to ask in what areas the School of Engineering could make significant world-changing impact, and how the school should be configured to address the major opportunities and challenges of the future.

    The process resulted in a set of 10 broad aspirational questions to inspire thought on the school’s potential impact in the next 20 years. The process also resulted in a series of actionable recommendations across three areas – research, education, and culture. Drell’s approach to leading change emphasized the importance of creating conditions to optimize the probability of success.

    As dean, Drell placed an emphasis on diversity and inclusion. She focused on increasing the participation of women and underrepresented minorities in engineering. She also sought to ensure a welcoming and inclusive environment for students of all backgrounds in the school.

    In addition to her administrative responsibilities, Drell teaches a winter-quarter companion course to introductory physics each year for undergraduate students who had limited exposure to the subject in high school.

    Drell is a member of the National Academy of Sciences and the American Academy of Arts and Sciences, and is a fellow of the American Physical Society. She has been the recipient of a Guggenheim Fellowship and a National Science Foundation Presidential Young Investigator Award.

  • Justin Du Bois

    Justin Du Bois

    Henry Dreyfus Professor of Chemistry and Professor, by courtesy, of Chemical and Systems Biology

    BioResearch and Scholarship

    Research in the Du Bois laboratory spans reaction methods development, natural product synthesis, and chemical biology, and draws on expertise in molecular design, molecular recognition, and physical organic chemistry. An outstanding goal of our program has been to develop C–H bond functionalization processes as general methods for organic chemistry, and to demonstrate how such tools can impact the logic of chemical synthesis. A second area of interest focuses on the role of ion channels in electrical conduction and the specific involvement of channel subtypes in the sensation of pain. This work is enabled in part through the advent of small molecule modulators of channel function.

    The Du Bois group has described new tactics for the selective conversion of saturated C–H to C–N and C–O bonds. These methods have general utility in synthesis, making possible the single-step incorporation of nitrogen and oxygen functional groups and thus simplifying the process of assembling complex molecules. To date, lab members have employed these versatile oxidation technologies to prepare natural products that include manzacidin A and C, agelastatin, tetrodotoxin, and saxitoxin. Detailed mechanistic studies of metal-catalyzed C–H functionalization reactions are performed in parallel with process development and chemical synthesis. These efforts ultimately give way to advances in catalyst design. A long-standing goal of this program is to identify robust catalyst systems that afford absolute control of reaction selectivity.

    In a second program area, the Du Bois group is exploring voltage-gated ion channel structure and function using the tools of chemistry in combination with those of molecular biology, electrophysiology, microscopy and mass spectrometry. Much of this work has focused on studies of eukaryotic Na and Cl ion channels. The Du Bois lab is interested in understanding the biochemical mechanisms that underlie channel subtype regulation and how such processes may be altered following nerve injury. Small molecule toxins serve as lead compounds for the design of isoform-selective channel modulators, affinity reagents, and fluorescence imaging probes. Access to toxins and modified forms thereof (including saxitoxin, gonyautoxin, batrachotoxin, and veratridine) through de novo synthesis drives studies to elucidate toxin-receptor interactions and to develop new pharmacologic tools to study ion channel function in primary cells and murine pain models.

  • John Duchi

    John Duchi

    Associate Professor of Statistics, of Electrical Engineering and, by courtesy, of Computer Science

    Current Research and Scholarly InterestsMy work spans statistical learning, optimization, information theory, and computation, with a few driving goals: 1. To discover statistical learning procedures that optimally trade between real-world resources while maintaining statistical efficiency. 2. To build efficient large-scale optimization methods that move beyond bespoke solutions to methods that robustly work. 3. To develop tools to assess and guarantee the validity of---and confidence we should have in---machine-learned systems.

  • Maria Theresa Dulay

    Maria Theresa Dulay

    Senior Research Scientist, Basic Life
    Senior Research Scientist, Basic Life, Rad/Molecular Imaging Program at Stanford

    BioReceived PhD from University of Texas at Austin, Department of Chemistry with Marye Anne Fox
    NIH Postdoctoral Fellow at Stanford University in Richard N. Zare's research lab, Department of Chemistry