About

Doug Loy is a professor at the University of Arizona in the Department of Chemistry and Biochemistry. He holds a Master of Science degree from Northern Arizona University and a Ph.D. from the University of California, Irvine. His professional experience includes technical staff positions at Sandia National Labs from 1991 to 2003 and at Los Alamos National Labs from 2003 to 2005. He also served as an adjunct professor at the University of New Mexico from 2001 to 2005. His research focuses on energy science, instrument development, materials and polymer chemistry, surface and solid state chemistry, and synthesis and synthetic methods development. A significant area of his research involves fuel cell electrolyte membranes, where he aims to develop cost-effective, easily processed, and chemically stable proton-conducting membranes with high thermal stability and tailorable gas permeabilities. Notably, he and his colleagues at Sandia National Labs have developed sulfonated polyarylenes as polymeric electrolytes, which have demonstrated excellent proton conductivity, thermal stability, mechanical properties, and chemical stability. Fuel cells built with these membranes have outperformed those using commercially available membranes, highlighting his contributions to advancing fuel cell technology.

Research topics

• Materials science
• Optics
• Organic chemistry
• Biochemistry
• Chemistry
• Nuclear chemistry
• Composite material
• Physics
• Chemical engineering

Selected publications

• Integrated 3D printing of transparency-on-demand glass microstructure

  ArXiv.org · 2025-01-24 · 2 citations

  preprintOpen access

  Glass is essential in optics and photonics due to its exceptional optical, mechanical, thermal, and chemical properties. Additive manufacturing has emerged as a novel method for fabricating complex glass elements in recent years, yet achieving locally controlled transparency in glass micro-objects remains a significant challenge. We present an innovative method, termed Transparency-on-Demand Glass Additive Manufacturing (TGAM), to control the transparency of 3D printed glass elements using polymeric silsesquioxane (PSQ) and two-photon polymerization (TPP). By precisely manipulating key parameters such as laser power, scanning speed, part thickness, and pyrolysis heating rate, we achieve the desired transparency levels. Our study reveals that monomer conversion during printing, structure thickness, and pyrolysis heating strategy significantly influence PSQ oxidation, resulting in varying transparency in the final glass product. This method enables the creation of high-precision, variable-transparency glass micro-components, providing a scalable and efficient solution for producing complex glass structures with tailored optical transparency. Our technique paves the way for integrated manufacturing of controllable-transparency glass micro-structures, unlocking new possibilities for advanced optical and photonic applications.

  PublisherOA PDFDOI

• Cost-Effective Motionless Color Coded Ptychography for High-Throughput Biomedical Imaging

  ACS Photonics · 2025-05-26 · 3 citations

  article

  High-throughput imaging methods are essential for various biomedical applications such as digital pathology, drug screening, and early stage cancer detection. Over the past few decades, numerous lensless techniques have emerged to provide high-throughput imaging with significantly more cost-effective hardware compared to conventional optical microscopy systems. Most lensless systems require sophisticated multiheight mechanical motions for phase retrieval, combined with subpixel shifts to reconstruct high-resolution images. These setups often involve bulky mechanical stages. Alternative approaches utilizing multiwavelength techniques can achieve similar physical shifts needed for phase retrieval but sacrifice color information in the process. We propose a novel coded ptychography lensless system capable of recovering high-resolution holographic images by using a single wavelength without any mechanical motion. Additionally, we leveraged an RGB LED matrix for color lensless imaging. Our compact lensless system demonstrates its capabilities by imaging various mouse tissues and organisms and oral cells offering a large field of view 30 mm2 with a resolution of 1.95 μm.

  PublisherDOI

• A review on surface and interface engineering of nanocellulose and its application in smart packaging

  Advances in Colloid and Interface Science · 2025-08-22 · 7 citations

  reviewCorresponding
  PublisherDOI

• Advanced 3D printing techniques for multi-functional micro-optics

  2025-03-19

  article
  PublisherDOI

• Dual-Head Multi-Photon Polymerization 3d Printing for Parallel Additive Manufacturing Organic/Inorganic Materials in Optics

  SSRN Electronic Journal · 2025-01-01

  preprintOpen access
  PublisherDOI

• Additive-free multi-transparency glass 3D printing

  2025-03-19

  article

  Glass is essential in modern applications due to its exceptional properties, yet its additive manufacturing, especially for complex geometries, faces challenges in precise transparency control. We developed an additive-free, photoexcitation-induced multi-transparency glass 3D printing method using Polymetric Silsesquioxane (PSQ) and Direct Laser Writing (DLW) with Two-Photon Polymerization (TPP). By adjusting laser power, scanning speed, structure thickness, and heating rates during 3D printing, we controlled the transparency of the glass. Raman spectroscopy was used to analyze the polymerization degree and its impact on transparency. Our method allows for precise multi-transparency glass components, enhancing applications and reliability, and addressing stray light suppression in micro-optical systems, thus improving imaging system performance.

  PublisherDOI

• Extremely Compact 3D Printed Glass Ternary Diffractive Optical Element for Holographic Images

  Advanced Optical Materials · 2025-06-10 · 3 citations

  article

  The design and fabrication of compact and versatile holographic structures are critical for advancing next-generation technologies, ranging from augmented and virtual reality (AR/VR) devices to optical holographic data storage. While significant progress has been made in holographic design and fabrication, existing methods often involve trade-offs between size, holographic image quality, and manufacturing complexity. Binary or few-level holographic structures, though simple to design and fabricate, are prone to twin-image artifacts, limiting their performance. In contrast, common spatial light modulators (SLMs) achieve higher fidelity but are bulky and unsuitable for compact applications. In this work, we present a novel approach and proof to holographic diffractive optical elements (DOEs) by integrating a ternary phase design with high-resolution glass 3D printing. Utilizing the ternary design achieves the minimal quantization required to suppress twin images, balancing optical performance and fabrication simplicity. We fabricated glass DOEs with nanometer-scale precision using additive manufacturing, achieving excellent agreement between simulated and experimental holographic results. Comparative thermal resistance tests demonstrated the superior durability of glass DOEs, which maintained structural integrity and holographic performance under extreme conditions, outperforming organic alternatives. By combining innovative phase design with the inherent material advantages of glass-thermal resistance, mechanical durability, and optical clarity-this study highlights the transformative potential of 3D-printed glass DOEs.

  PublisherDOI

• Integrated 3D Printing of Transparency‐on‐Demand Glass Microstructure

  Advanced Optical Materials · 2025-04-25 · 1 citations

  article

  Abstract Glass is essential in optics and photonics due to its exceptional optical, mechanical, thermal, and chemical properties. Additive manufacturing has emerged as a novel method for fabricating complex glass elements in recent years, yet achieving locally controlled transparency in glass micro‐objects remains a significant challenge. An innovative method, termed Transparency‐on‐Demand Glass Additive Manufacturing, to control the transparency of 3D printed glass elements using polymeric silsesquioxane (PSQ) and two‐photon polymerization is presented. By precisely manipulating key parameters such as laser power, scanning speed, part thickness, and pyrolysis heating rate, the desired transparency levels are achieved. This study reveals that monomer conversion during printing, structure thickness, and pyrolysis heating strategy significantly influence PSQ oxidation, resulting in varying transparency in the final glass product. This method enables the creation of high‐precision, variable‐transparency glass micro‐components, providing a scalable and efficient solution for producing complex glass structures with tailored optical transparency. This technique paves the way for integrated manufacturing of controllable‐transparency glass micro‐structures, unlocking new possibilities for advanced optical and photonic applications.

  PublisherDOI

• Dual-head multi-photon polymerization 3D printing for parallel additive manufacturing organic/inorganic materials in optics

  Additive manufacturing · 2025-04-01 · 8 citations

  article
  PublisherDOI

• 3D printing glass micro-optics from silsesquioxanes

  2024-03-12

  articleSenior author

  We developed a series of photo-curable liquid resins containing silsesquioxane or silsesquioxane-structured molecules, which were subsequently utilized in a two-photon polymerization printing strategy. The printed structures underwent a controlled thermal treatment, converting them into inorganic glass while maintaining a temperature below the glass transition temperature of silica. Our investigation focused on elucidating the influence of the molecular composition of the resin on its intrinsic properties, print quality, and dimensional changes during the thermal conversion process. Our results underscore the capability of this approach to fabricate micro-optics with exceptional precision and complexity, thereby showcasing its potential for advancing micro-optical device fabrication.

  PublisherDOI

Frequent coauthors

• Kenneth J. Shea

  125 shared

• Gregory M. Jamison

  Sandia National Laboratories California

  63 shared

• Kamyar Rahimian

  53 shared

• David R. Wheeler

  Sandia National Laboratories

  50 shared

• Roger A. Assink

  44 shared

• James H. Small

  Merck & Co., Inc., Rahway, NJ, USA (United States)

  37 shared

• Blake A. Simmons

  30 shared

• P. A. Monson

  University of Massachusetts Amherst

  30 shared

Education

• Ph.D., Chemistry

  University of California Irvine

  1991