Department of Chemistry
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Hamers Research Group
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Widicus Weaver Research Group
This research group shares an affiliation with both the Department of Chemistry and the Department of Astronomy.
Recent Submissions
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Generic behavior of ultrastability and anisotropic molecular packing in co-deposited organic semiconductor glass mixtures
(Chemistry of Materials, 2024-03-29)Vapor-deposited glass mixtures of organic semiconductors commonly serve as active layers in organic electronic devices, whose lifetime and performance are strongly influenced by the stability and structure of these mixed ... -
High Density Two-Component Glasses of Organic Semiconductors Prepared by Physical Vapor Deposition
(Journal of Physical Chemistry Letters, ACS publication, 2024-08-01)Physical vapor deposition (PVD) is widely utilized for the production of organic semiconductor devices due to its ability to form thin layers with exceptional properties. Although the layers in the device usually consist ... -
Speciated Volatile Organic Compound Measurements in Downtown Chicago
(2024-06-19)Real time measurements of ambient volatile organic compounds were made using a Tofwerk’s PTR-ToF-MS equipped with an Aerodyne gas chromatography instrument in downtown Chicago (University of Illinois Science and Engineering ... -
Cloud Processing of DMS Oxidation Products Limits SO2 and OCS Production in the Eastern North Atlantic Marine Boundary Layer
(2024-06-19)Dimethyl sulfide (DMS) is the major sulfur species emitted from the ocean. The gas-phase oxidation of DMS by hydroxyl radicals proceeds through the stable, soluble intermediate hydroperoxymethyl thioformate (HPMTF), ... -
Assessment of N2O5 heterogeneous reaction mechanisms in the Community Multiscale Air Quality (CMAQ) model
(2023-10-03)Nitrogen oxides have negative human health impacts and play a central role in the production of secondary air quality pollutants like ozone and PM2.5. While day-time NOx cycling depends on photolytic reactions, night-time ... -
Production of oxygenated volatile organic compounds from the ozonolysis of coastal seawater
(2023-09-26)Dry deposition of ozone (O3) to the ocean surface and the ozonolysis of organic material found in the sea surface microlayer (SSML) is a potential source of volatile organic compounds (VOC) to the marine atmosphere. We use ... -
Surface Equilibration Mechanism Controls the Stability of a Model Codeposited Glass Mixture of Organic Semiconductors
(2023-05-02)While previous work has identified the conditions for preparing ultrastable singlecomponent organic glasses by physical vapor deposition (PVD), little is known about the stability of codeposited mixtures. Here, we prepared ... -
Characterization of the Interfacial Orientation and Molecular Conformation in a Glass-Forming Organic Semiconductor
(ACS Applied Materials & Interfaces, 2022-01-04)The ability to control structure in molecular glasses has enabled them to play a key role in modern technology; in particular, they are ubiquitous in organic light-emitting diodes. While the interplay between bulk structure ... -
Observations of biogenic volatile organic compounds over a mixed temperate forest during the summer to autumn transition
(2022-09-26)The exchange of trace gases between the biosphere and the atmosphere is an important process that controls both chemical and physical properties of the atmosphere with implications for air quality and climate change. The ... -
Measurements of Volatile Organic Compounds in an Occupied Classroom
(2022-07-27)This dataset contains measurements of indoor air quality made in an occupied classroom at the University of Wisconsin, Madison. The measurements are described in detail in the attached readme file. Measurements include: ... -
Observation-Based Constraints on Modeled Aerosol Surface Area: Implications for Heterogeneous Chemistry
(2022-05)Heterogeneous reactions occurring at the surface of atmospheric aerosol particles regulate the production and lifetime of a wide array of atmospheric gases. Aerosol surface area plays a critical role in setting the rate ... -
SPFIT input, output, and .lin files for the mm/sub-mm assignment and fit of the CH2NH2 radical
(2022-05)These are the input, output, and line files for the assignment and fitting of the millimeter/submillimeter spectrum CH2NH2 radical in the SPFIT program. File with and without the inclusion of spin-rotation fitting terms ... -
ERHAM input, output, and .lin files for the ground state mm/sub-mm assignment and fit of Ar-CH3OH
(2022-05)These are the input, output, and line files for the assignment and fitting of the millimeter/submillimeter spectrum of the Ar-CH3OH van der Waals cluster in the ERHAM program. -
ERHAM input, and output files for the ground state mm/sub-mm assignment and fit of pyruvic acid.
(ACS Earth and Space Chemistry, 2022-02-22)These are the input and output files used for fitting the millimeter/submillimeter rotational spectrum of pyruvic acid. -
Efficient production of carbonyl sulfide in the low-NOx oxidation of dimethyl sulfide
(Geophysical Research Letters, 2021-11-08)The oxidation of carbonyl sulfide (OCS) is the primary, continuous source of stratospheric sulfate aerosol particles, which can scatter shortwave radiation and catalyze heterogeneous reactions in the stratosphere. While ...