Steven Hughes AdminExpertise
Chemistry, Semiconductor nanocrystal synthesis, CuInS2, AgGaS2Instrumentation
TEM, XRD, SEM (EDS), fluorescence (with integrating sphere), ICPBackground & Research Interests
The focus of my continuing research is the synthesis and characterization of I-III-VI semiconductor nanocrystals. I am currently working with CuInS2 and AgGaS¬2 materials including various alloys and shelled compositions. My lab studies these materials to best understand their potential as LED phosphors and photocatalysts. Additionally, I’ve been working in collaboration with a developmental biologist to study the toxicity of these materials in zebrafish embryos. Collaboration Interests: 1.Better understanding the photophysics of our nanomaterials. Like CIS, AGS can have extremely intense trap state emission. Unlike CIS, this emission can be suppressed in order to observe the band gap emission. It’s neat, and I’d love to work with someone to understand this better. 2.Silver gallium sulfide has demonstrated the potential to be an effective photocatalyst for the reduction of hydrogen gas. I’m interested in working with someone who knows how to characterize materials for this application better than me.
Pacific Lutheran University
Physical Chemistry, Semiconductor Nanocrystal Synthesis, Nanocrystal Surface ChemistryInstrumentation
500 MHz FT-NMR, AFM, GC/MS, HPLC, FTIR, ICP-MS,microwave digestion, inert atmosphere gloveboxBackground & Research Interests
My research group investigates the synthesis of colloidal semiconductor nanocrystals. We are interested in understanding the chemistry that determines nanocrystal shape and stability. We also examine nanocrystal surface chemistry and ligand exchange processes. We are interested in understanding how the surface of a nanocrystal alters its properties and stability.
Lewis & Clark College
inorganic chemistry, nanomaterials chemistry, electrodeposition, surface chemistry of nanoparticlesInstrumentation
DLS / zeta, single crystal XRD, powder XRD, benchtop SEM, 600 MHz NMRBackground & Research Interests
I have experience in nanomaterials synthesis via templated electrodeposition and thin film electrodeposition. I am also interested in studying nanoparticle surface chemistry and environmental fate.
See: https://www.haverford.edu/chemistry/resources-instrumentsBackground & Research Interests
Molecular dynamics of nano-bio interactions, vibrational spectroscopy calculations
University of Puget Sound
Metallic nanoparticle synthesis, protein-nanoparticle interactions, nanoparticle toxicityInstrumentation
Malvern Nano ZS, SEM, Confocal microscopy, QToF Tandem MS/MSBackground & Research Interests
My research group will be examining the biomolecular interactions of bismuth nanoparticles and their potential non-acute toxicity in the model organism C. elegans
Western Oregon University
Green synthesis, environmental impacts of materialsInstrumentation
UV-Vis IR GC HPLC AA Bench-top NMRBackground & Research Interests
Research in my group focuses on green synthesis and environmental impacts of inorganic and metal-organic framework materials. Traditional syntheses of those materials often involve toxic organic solvents and/or heavy metals or corrosive metal compounds, and many are energy intensive. One of our goals is to find greener synthetic methods to make those materials. For large-scale applications of those materials, we would also like to know their impacts on the environment when they are disposed, so our other goal is to study the decomposition processes of those materials under different conditions, and the impacts of their decomposition products on the environment.
QD synthesis, photophysical characterization, charge transferInstrumentation
Fluorimeter with integrating sphere, TCSPC lifetime spectrometer, 400 MHz NMR, inert atmosphere gloveboxBackground & Research Interests
We are interested in understanding and harnessing photo-initiated charge and energy transfer in nanoscale systems, with a focus on nanoscale assemblies such as nanocrystal – organic molecule conjugates. Current work aims to use these systems for photocatalysis schemes and as spin qubits.
Semiconductor nanocrystals, quantum dots, isothermal titration calorimetry, surface chemistry, ultrafast spectroscopyInstrumentation
300 MHz NMR, UV-vis absorption and fluorescence, FT-IR, Raman, X-ray fluorescence, AAS, ICP-OES, isothermal titration calorimetry, GC-MS, UHPLC-MS, glove boxBackground & Research Interests
My current research projects focus on the thermodynamics of surface modifications on semiconductor nanocrystals. In particular, I am using calorimetry to investigate ligand exchange reactions on colloidal quantum dots to gain fundamental understanding of these reactions. I’m also working to adapt existing, alternative techniques to determine chemical composition of nanomaterials. I also work with the Mercer Engineering Research Center (MREC) on several projects addressing chemical- and surface-related challenges for the Department of Defense and the U.S. Air Force. These projects include: corrosion prevention and control; chemical, biological, radiological, and nuclear warfare agents; and composite repairs and bonding on multiple aircraft and service equipment and vehicles.
College of Charleston
voltammetry, NP fate in the environmentInstrumentation
400 MHz NMR, FT-IR, EPR, ATM, MALDI-TOF, Raman, various UV, HPLC, LC-MS, GC-MS, DLS, potentiostat and controlled growth mercury electrodeBackground & Research Interests
My group researches the environmental fate of metal-containing nanomaterials, specifically the processes of dissolution and sulfidation, which can control their bioavailability/toxicity. We recently started investigating how magnetic nanoparticles can be used as a water treatment strategy.
Franklin & Marshall College
semiconductor nanoparticle synthesis, cation exchange, plasmonics, copper chalcogenidesInstrumentation
TEM, UV/visible/NIR absorption spectroscopy with integrating sphere, SEM-EDS, PXRD, ICPBackground & Research Interests
Our group has been working on synthesizing plasmonic copper chalcogenide nanoheterostructures. We explore how to alter and control the optical behavior. We are also developing new procedures and deeper understandings of how to alter chemistry through anion and cation exchange. These materials can be useful photocatalysts and this is an area where I would be particularly interested in new collaboration. In addition, I have a collaborative project exploring how the solid-state behavior of iron sulfide ocean sediments affects the adsorption of trace metals.
analytical chemistry, nanometrologyInstrumentation
UV-vis and fluorescence spectroscopy, FAAS, DLS, CE, HPLC, GC-MS, various electrochemistry workstations, CD, XRD, EPR, 400 MHz NMRBackground & Research Interests
Research in my group involves the development of analytical techniques for the characterization of nanomaterials. This ranges from purification of DNA origami nanostructures to the evaluation of silver nanoparticle transformations in complex biological and environmental matrices to the study of nano- and microplastic fate and transport.
Santa Clara University
SEM, fluorimeter, various MS, DLS, other instrumentation here: https://www.scu.edu/cas/chemistry/research/facilities-and-instrumentation/Background & Research Interests
We focus on development of methods to characterize and predict the biochemical interactions that mediate nanomaterial behavior.
Polymer nanoparticles, biomolecule assay development, lateral flow assaysInstrumentation
Dynamic Light Scattering, ICP-OES, 400 MHz NMR, FTIR, Fluorimeter with solid state cell, UV-Vis, LC-MS, GC-MS, HPLCBackground & Research Interests
I developed polymer nanoparticle-based detection strategies for biomolecules in my graduate work. I also developed methods to enhance the sensitivity of current low-resource diagnostics to better understand infectious disease biomarkers. At E-town, I'm the analytical chemist in the department and my research focuses of the development of a lateral flow assay, that utilizes polymer nanoparticles, for detection of heavy metals in drinking water.
Nanocrystal Synthesis & Surface Chemistry, Polymer NanocompositesInstrumentation
Zetasizer, SEM, powder XRD, AFM, GC-MS, GPC, DSC, TGA, DMA, FluorimeterBackground & Research Interests
We are interested in organic materials research leveraging dynamic covalent bond chemistry. Current research includes work on the synthesis and surface chemistry of porous framework nanoparticle colloids.
Gold/silver nanoparticle synthesis, nanoparticle surface modifications with polymers, environmental fate of NPsInstrumentation
DLS/Zeta, ITC, CD, TEM, AFM, Fluorescence microscopyBackground & Research Interests
My research group is broadly interested in understanding how the surface chemistry of nanoparticles impacts their behavior. Current work explores the quantification and characterization of responsive polyelectrolyte adsorbates to drive nanoparticle assemblies.
Nanocrystal Synthesis & Surface Chemistry, NMR, XRDInstrumentation
400 MHz NMR, single-crystal XRD, various UV-Vis/fluorescence spectrometers, 785 nm Raman, N2 glovebox, various mass spectrometersBackground & Research Interests
Semiconductor and metallic nanocrystal synthesis, particularly focused on precursors and reaction pathways.
physical chemistry, Raman spectroscopy, silver nanoparticlesInstrumentation
Raman spectrometer, 400 MHz NMR, FTIR, Fluorimeter, AFM, SEM, UV-Vis, LC-MS, GC-MS, HPLCBackground & Research Interests
I have two main research interests at the interface of chemistry, physics and material science. It primarily focuses on using Raman spectroscopy as an analytical tool to characterize both materials and physical processes. Current projects focus on the probing the influence of composition on the structure of glassy materials while the other involves probing the dynamics of individual molecules using surface-enhanced Raman spectroscopy (SERS).
Metallic Nanomaterials Synthesis, Electrocatalysis, Fuel CellInstrumentation
400 MHz NMR, CEM Microwaves, ICP-OES, BAS Electrochemistry workstation, TGA-DSC. Other instruments: https://science.hamptonu.edu/chem/facilities.cfmBackground & Research Interests
The main focus of our research interests is materials chemistry, nanocatalysis, renewable energy, electrocatalysis and application of nanotechnology in forensic chemistry. Current projects involve fabrication of multimetallic alloyed nanoparticles based on copper, silver, gold, palladium, and platinum.
Physics, synthesis of nanoparticles, superparamagnetism, XRD, Raman, Mossbauer SpectroscopyInstrumentation
AFM, SEM, XRD, MacroRaman, MossbauerBackground & Research Interests
nanowire-nanoparticle dynamics at interfaces; superparamagnetic relaxation;
St. Olaf College
Physical chemistry and applied laser diagnosticsInstrumentation
Pulsed nanosecond and CW laser sources, spectrometers and scanning monochromator, liquid nitrogen cryostat, converging-diverging nozzle gas expansion instrument. Other equipment: https://wp.stolaf.edu/chemistry/files/2013/07/Dept_equipF07.pdfBackground & Research Interests
Development and use of optical sensing techniques for the characterization of gaseous high-speed flows and combustion, study of energy transfer phenomena, and development of associated instrumentation and data analysis methodologies.
Au/Ag/Cu nanoparticle synthesis, catalysis, photocatalysis, green(er) nanoparticle synthesisInstrumentation
UV-vis-NIR, fluorescence, AAS, LC-MS, SEM-EDS, PXRD, DSC, AFMBackground & Research Interests
Synthesis and characterization of hybrid metal oxide-metal nanomaterials for applications in photocatalysis and solar energy capture. Applications of ultrasmall copper nanoparticles in solution based catalysis and electrocatalysis.
Bioanalytical chemistry, surface analysis, biophysics, nanotoxicology, environmental chemistryInstrumentation
https://www.augsburg.edu/chemistry/facilities/Background & Research Interests
My lab works at the interface of bioanalytical and materials chemistry. We applies analytical tools to probe the interactions at the nano-bio interface to better understand the environmental fate of novel nanomaterials, as well as the biomolecular impact of model organisms upon nanomaterial exposure.