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Anisotropic Geminate and Non-Geminate Recombination of Triplet Excitons in Singlet Fission of Single Crystalline Hexacene

Anisotropic Geminate and Non-Geminate Recombination of Triplet Excitons in Singlet Fission of Single Crystalline Hexacene

01/23/2020

Jian Han, Qing Xie, Ganghua Deng, Yuqin Qian, Yi Rao. Singlet fission is known to improve solar energy utilization by circumventing the Shockley-Queisser thermodynamic limit. Understanding of triplet exciton generated by singlet fission is essential for

Understanding Trends in Pesticide Volatilization from Agricultural Fields Using the Pesticide Loss via Volatilization Model

Understanding Trends in Pesticide Volatilization from Agricultural Fields Using the Pesticide Loss via Volatilization Model

12/20/2019

Kimberly J. Hageman, Sean M. Lyons. The Pesticide Loss via Volatilization model was developed to predict and understand pesticide volatilization rates from a planted agricultural field. The model allows the user to adjust the properties of the pesticide

Southern Ocean temperature records and ice-sheet models demonstrate rapid Antarctic ice sheet retreat under low atmospheric CO2 during Marine Isotope Stage 31

Southern Ocean temperature records and ice-sheet models demonstrate rapid Antarctic ice sheet retreat under low atmospheric CO2 during Marine Isotope Stage 31

11/28/2019

Kimberly J. Hageman. Over the last 5 million years, the Earth’s climate has oscillated between warm (interglacial) and cold (glacial) states. Some particularly warm interglacial periods (i.e. ‘super-interglacials’) occurred under low atmospheric CO2 and

Fate of the organophosphate insecticide, chlorpyrifos, in leaves, soil, and air following application

Fate of the organophosphate insecticide, chlorpyrifos, in leaves, soil, and air following application

10/24/2019

Kimberly J. Hageman. A field study was conducted to further our understanding about the fate and transport of the organophosphate insecticide, chlorpyrifos, and its degradation product, chlorpyrifos oxon. Leaf, soil and air sampling was conducted for 2

Anisotropic Singlet Fission in Single Crystalline Hexacene

Anisotropic Singlet Fission in Single Crystalline Hexacene

09/27/2019

Yi Rao, Gang-Hua Deng, Xia Li, Yuqin Qian. Singlet fission is known to improve solar energy utilization by circumventing the Shockley-Queisser limit. The two essential steps of singlet fission are the formation of a correlated triplet pair and its subse

Phthalate esters in biota, air and water in an agricultural area of western China, with emphasis on bioaccumulation and human exposure

Phthalate esters in biota, air and water in an agricultural area of western China, with emphasis on bioaccumulation and human exposure

09/02/2019

Kimberly J. Hageman, Ming-Jing He. Phthalate esters (PAEs) have been shown to be ubiquitous in abiotic and biotic environmental compartments; however, information about bioaccumulation behavior and human exposure, both via environmental exposure and th

Vibronic fingerprint of singlet fission in hexacene

Vibronic fingerprint of singlet fission in hexacene

08/05/2019

Yi Rao, Gang-Hua Deng, Qianshun Wei, Jian Han, Yuqin Qian. Singlet fission has the great potential to overcome the Shockley–Queisser thermodynamic limit and thus promotes solar power conversion efficiency. However, the current limited understandings of

Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly <i>Deleatidium</i> spp.

Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly Deleatidium spp.

08/02/2019

Kimberly J. Hageman, Robert E. Alumbaugh, Sean M. Lyons. Neonicotinoid insecticides have been shown to have high chronic toxicity relative to acute toxicity, and therefore short‐term toxicity tests ≤96 h in duration may underestimate their environmental

Current-use pesticides in New Zealand streams: Comparing results from grab samples and three types of passive samplers

Current-use pesticides in New Zealand streams: Comparing results from grab samples and three types of passive samplers

07/26/2019

Kimberly J. Hageman. New Zealand uses more than a ton of pesticides each year; many of these are mobile, relatively persistent, and can make their way into waterways. While considerable effort goes into monitoring nutrients in agricultural streams and

Fabrication of Anisotropic Silver Nanoplatelets on the Surface of TiO2 Fibers for Enhanced Photocatalysis of a Chemical Warfare Agent Simulant, Methyl Paraoxon

Fabrication of Anisotropic Silver Nanoplatelets on the Surface of TiO2 Fibers for Enhanced Photocatalysis of a Chemical Warfare Agent Simulant, Methyl Paraoxon

07/23/2019

Yi Rao, Yuqin Qian. Among the world’s most deadly toxins are a class of organophosphates that are used as chemical warfare agents (CWAs). It is imperative to continue to develop novel means for mitigation and protection against these chemical threats.

Interfaces of Gas-Aerosol Particles: Relative Humidity and Salt Concentration Effects

Interfaces of Gas-Aerosol Particles: Relative Humidity and Salt Concentration Effects

06/28/2019

Yi Rao, Yuqin Qian, Gang-hua Deng, Jordan Lapp. The growth of aerosol particles is intimately related to chemical reactions in the gas phase and particle phase and at gas−aerosol particle interfaces. While chemical reactions in gas and particle phases a

Towards Sustainable Environmental Quality: Priority Research Questions for the Australasian Region of Oceania

Towards Sustainable Environmental Quality: Priority Research Questions for the Australasian Region of Oceania

06/24/2019

Kimberly Hageman. Environmental challenges persist across the world, including the Australasian region of Oceania, where biodiversity hotspots and unique ecosystems such as the Great Barrier Reef are common. These systems are routinely affected by mult

Interfacial Sites between Cobalt Nitride an Cobalt Act as Bifunctional Catalysts for Hydrogen Electrochemistry

Interfacial Sites between Cobalt Nitride an Cobalt Act as Bifunctional Catalysts for Hydrogen Electrochemistry

06/12/2019

Yi Rao, Yujie Sun, Fuzhan Song. Hydrogen (H2) electrochemistry primarily consists of two reactions: hydrogen evolution reaction in water for H2 production (HER) and hydrogen oxidation reaction in hydrogen fuel cells for H2 utilization (HOR). The realiz

Air Analysis  l  Sampling

Air Analysis l Sampling

03/12/2019

Kimberly J. Hageman, Ashlie D. Kinross. The composition of air has been a topic of interest since the early days of scientific inquiry. In modern times, the need has arisen to characterize and quantify a variety of harmful substances that are present i

Molecular rotation in 3 dimensions at an air/water interface using femtosecond time resolved sum frequency generation

Molecular rotation in 3 dimensions at an air/water interface using femtosecond time resolved sum frequency generation

03/07/2019

Yi Rao, Yuqin Qian, Gang-Hua Deng, Ashlie Kinross. This paper presents the first study of the rotations of rigid molecules in 3 dimensions at the air/water interface, using the femtosecond time resolved sum frequency generation (SFG) technique. For the

Carboxylic Anchoring Dye p-Ethyl Red Does Not Adsorb Directly onto TiO2 Particles in Protic Solvents

Carboxylic Anchoring Dye p-Ethyl Red Does Not Adsorb Directly onto TiO2 Particles in Protic Solvents

02/06/2019

Yi Rao. Adsorption of the carboxylic anchoring dye, pethyl red (p-ER), onto TiO2 nanoparticles in protic vs aprotic solvents was studied in situ using the surface-specific technique, second harmonic light scattering (SHS). Two different adsorption sch

Development of ultrafast broadband electronic sum frequency generation for charge dynamics at surfaces and interfaces

Development of ultrafast broadband electronic sum frequency generation for charge dynamics at surfaces and interfaces

01/14/2019

Yi Rao, Gang-Hua Deng, Yuqin Qian. Understandings of population and relaxation of charges at surfaces and interfaces are essential to improve charge collection efficiency for energy conversion, catalysis, and photosynthesis. Existing time-resolved surf