个人简介

PhD University of Basel (Switzerland) Postdoctoral Fellow, Georgia Institute of Technology

研究领域

Photochemistry/Materials/Physical Chemistry/Nanochemistry/Bio- and Energy Applications/Biophysical and Biomedical Science and Engineering/Spectroscopy

Nanomaterials to Improve Energy Conversion Schemes Nanoscience leads to a wide range of energy applications from photovoltaics to thermoelectrics. It is expected that nanostructures play a pivotal role in the quickly rising areas of energy conversion and energy storage. We synthesize inorganic nanocrystals and control their sizes, compositions, and their surfaces and characterize them with state-of-the-art technology, including electron microscopy with a 1 nanometer resolution and optical spectroscopy with a time-resolution of 100 femotseconds to uncover the often surprising properties of the size-confined materials. For example, we investigate the optoelectronic properties of nanocrystals and develop nanomaterials with properties of interest for the complex nanoarchitectures needed in energy-related applications. Please consult our publications for an update on recent research. Optoelectronics of Organic and Inorganic Material Organic materials are the basis of increasingly many materials and devices. However the electronic properties of organic materials, though fascinating, are complex and require detailed spectroscopic investigation. With femtosecond time-resolved laser spectroscopy and imaging techniques, studies of ensembles of molecules are performed. The goal of this research is to increase the understanding of the chemical dynamics and the electronic properties of molecules, assemblies, and nanocomposites. The uncovered novel concepts will be guide for the design of new technological or biomedical prototype devices. We are particularly interested in understanding the interfacing between molecules, nano-structures, and macroscopic materials. Building functional devices from nanostructures requires an understanding of the interactions between these components. Environmental Studies Persistent organic pollutants are a pressing issue for our environment. These compounds are resistant to environmental degradation through chemical, biological, and photolytic processes. They have been observed to persist in the environment, are capable of long-range transport, and exhibit bioaccumulation in human and animal tissue as well as in food chains. Therefore, they have potentially a significant impact on human health and the environment. We study the possibility to photodegrade organic pollutants in aqueous and lipophilic environments using the help of metal oxide nanostructures (TiO2, CeO2, etc.). We synthesize these photocatalysts, we dope them to achieve visible-light activation (e.g. using sun light to clean up oil spills, to clean surfaces under ambient light, etc.) and study the photoconversion of the pollutants into their photooxidation products. Often these decompositions are completely mineralizing the pollutants into CO2 and other inorganic oxidation products Ultrafast Laser Spectroscopy & Imaging The latest laser and imaging technology is available in our Center for Chemical Dynamics and additional facilities at CWRU to reveal the electronic and morphological properties of nanostructures in materials, cells, and prototype device structures. State-of-the-art femtosecond laser spectroscopy and imaging are used to uncover the relevant photoinduced processes. This is a promising field that aides in developing new and ambitious ideas in the context of energy, environment, and health-related research.

近期论文

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Li, J.; Mao, B.; Gole, J. G.; Burda, C.. “Visible-light-driven Reversible and Switchable Hydrophobic to Hydrophilic Nitrogen-doped Titania Surfaces: Correlation with Photocatalysis”. Nanoscale (2010), in press. Zhao, Y.; Dyck, J. S.; Hernandez, B. M.; Burda, C. “Improving Thermoelectric Properties of Chemically Synthesized Bi2Te3-Based Nanocrystals by Annealing”. J. Phys. Chem. C (2010), 114(26), 11607-11613. Liang, G.-X.; Li, L.-L.; Liu, H.-Y.; Zhang, J.-R.; Burda, C.; Zhu, J.-J. “Fabrication of Near-infrared-emitting CdSeTe/ZnS Core/shell Quantum Dots and their Electrogenerated Chemiluminescence”. Chem. Commun. (2010), 46(17), 2974-2976. Zhao, Y.; Dyck, J.S.; Hernandez, B.M.; Burda, C. “Enhancing Thermoelectric Performance of Ternary Nanocrystals Through Adjusting Carrier Concentration”. J. Am. Chem. Soc. (2010), 132(14), 4982-4983. Qiu, X.; Zhao, Yixin; S., Ian M.; Dyck, J. S.; Burda, C. “Improvement of the Thermoelectric Power Factor through Anisotropic Growth of Nanostructured PbSe Thin Films”. Dalton Trans. (2010), 39(4), 1095-1100. Cheng, Y.; Samia, A. C.; Li, J.; Kenney, M. E.*; Resnick, A.; Burda, C. “Delivery and Efficacy of a Cancer Drug as a Function of the Bond to the Gold Nanoparticle Surface”. Langmuir. (2010), 26(4), 2248-2255 Cheng, Y., Burda, C. Book chapter: “Nanoparticles for Photodynamic Therapy”. In Nanoscience and Technology, Elsevier, London, 2010. Mao, C.; Zhao, Y.; Qiu, X.; Zhu, J.; Burda, C. “Synthesis and characterization of nitrogen-doped SnO2 and comparison to nitrogen-doped CeO2 nanoparticles for visible-light applications”. ECS Trans. (2009), 16, 67-77. Zhao, Yixin; Burda, Clemens. “Chemical Synthesis of Bi0.5Sb1.5Te3 Nanocrystals and Their Surface Oxidation Properties”. ACS Appl. Mater. Interfaces (2009), 1(6), 1259-1263. Zhao, Yixin; Larimer, Philip; Pressler, Richard T.; Strowbridge, Ben W.; Burda, Clemens. “Wireless activation of neurons in brain slices using nanostructured semiconductor photoelectrodes”. Angew. Chem. Int. Ed. (2009), 48(13), 2407-2410 Zhao, Yixin; Pan, Hongcheng; Lou, Yongbing; Qiu, Xiaofeng; Zhu, JunJie; Burda, Clemens. “Plasmonic Cu2-xS Nanocrystals: Optical and Structural Properties of Copper-Deficient Copper(I) Sulfides”. J. Am. Chem. Soc. (2009), 131(12), 4253-4261. Dayal, S.; Burda, Clemens. “Surface Effects on Quantum Dot-Based Energy Transfer”. J. Am. Chem. Soc. (2007), 129(25): 7977-7981. Liu, Y.; Li, J.; Qiu, X.; Burda, Clemens. “Novel TiO2 nanocatalysts for wastewater purification: tapping energy from the sun”. Water Science and Technology (2006), 54, 47-54. Dayal, S.; Lou, Y.; Samia, Anna C.S.; Berlin, J. C.; Kenney, M. E.; Burda, Clemens. “Observation of Non-Foerster-Type Energy-Transfer Behavior in Quantum Dot-Phthalocyanine Conjugates”. J. Am. Chem. Soc. (2006), 128(43), 13974-13975 Qiu, Xiaofeng; Austin, Leah N.; Muscarella, Philip A.; Dyck, Jeffrey S.; Burda, Clemens. “Nanostructured Bi2Se3 Films and Their Theroelectric Transport Properties” Ange.Chem. Int. Ed. (2006), 45, 5656-5659 Qiu, X.; Lou, Y.; Samia, A. C. S.; Devadoss, A.; Burgess, J. D.; Dayal, S.; Burda, C. “PbTe Nanorods by Sonoelectrochemistry” Ange.Chem. Int. Ed. ; (2005), 44(36), 5855-7 Burda, C.; Chen, X.; Narayanan, R.; El-Sayed, M. A. “Chemistry and Properties of Nanocrystals of Different Shapes.” Chem. Rev.(Review); (2005), 105(4), 1025-1102