The research will be presented at the 231st American Chemical Society (ACS) national meeting being held in Atlanta on March 26-30.
John Morris’ group is studying the reactions of small molecules found in pollution of surfaces. Morris, associate professor of chemistry in the College of Science, and his students are looking specifically at hydrochloric acid (HCl) and triatomic oxygen (O3, a toxic form of oxygen), pollutants known to play a major role in atmosphere chemistry. They are using functionalized self-assembled monolayers (thin films – one molecule thick) to simulate organic surfaces. "It gives us control of the surface structure and chemical functionality so we can study how those aspects of a surface influence the fate of important gas-surface collisions," Morris said.
The experiments have led to a detailed understanding of the reaction mechanisms of HC1 and ozone on organic surfaces, which is what Morris will present in the paper authored by graduate student Larry R. Fiegland, Morris, and graduate student B. Scott Day.
A major finding is that ozone reacts with carbon-carbon double bonds to form crosslinked networks within the thin film. Carbon-carbon double bonds are the very strong forces that link carbon atoms together to help form long-chain molecules -- major components of many polymeric materials found in everyday life. "The formation of crosslinked networks is a new discovery – that provides a fundamental understanding of how, on the molecular level, organic surfaces degrade with prolonged exposure to ozone, a major atmospheric pollutant," Morris said. "Understanding the reaction mechanism may someday lead to more robust films for organic coatings, or polymeric coatings, such as paints."
Susan Trulove | EurekAlert!
Don't Give the Slightest Chance to Toxic Elements in Medicinal Products
23.03.2018 | Physikalisch-Technische Bundesanstalt (PTB)
North and South Cooperation to Combat Tuberculosis
22.03.2018 | Universität Zürich
Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
23.03.2018 | Event News
19.03.2018 | Event News
16.03.2018 | Event News
23.03.2018 | Materials Sciences
23.03.2018 | Agricultural and Forestry Science
23.03.2018 | Physics and Astronomy