Chemical Analysis of Nanodomains

Personnel

Project Leader(s):
Emily Smith

Principal Investigators:
Ning Fang, Jacob Petrich, Emily Smith

Overview

We seek to understand the basic principles that underlie energy-relevant chemical separations; develop analytical methods to improve the sensitivity, reliability, and productivity of analytical determinations; and to develop new approaches to analysis. Our research emphasizes instrumentation and technique development highly relevant to the main focus areas of the Separation and Analysis activities of the Division of Chemical Science, Geoscience and Biosciences within the DOE Office of Basic Energy Sciences.  

The goal of this research is to develop the next generation of imaging tools and methodologies for the analysis of phenomena that occur at nanometer length scales and picosecond time scales. The developed instrumentation and methodology will be applied to model systems of interest to the DOE mission, where fundamental insight can be gained with the high spatial and temporal resolution afforded by our developed methods: chemical reac tions in heterogeneous silica supported catalysts; the organization and dynamics of mixed model lipid bilayers and cell membranes; chromatographic interactions; and heterogeneous enzyme reactions. The methods we propose to develop are:

1. High resolution total internal reflection (TIR) Raman microspectroscopy and imaging
2. Sub-diffraction limited imaging, including differential interference contrast (DIC) microscopy, variable-angle evanescent-field (EFM) microscopy, and time-resolved stimulated emission depletion (STED) microscopy
3. Novel single molecule spectroscopies

 

This research is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences through the Ames Laboratory.  The Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02-07CH11358.

Publications

2012
Marchuk K; Guo Y J; Sun W; Vela J; Fang N . 2012. High-Precision Tracking with Non-blinking Quantum Dots Resolves Nanoscale Vertical Displacement. Journal of the American Chemical Society. 134:6108-6111. abstract
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Wang G F; Fang N; Conn P M . 2012. Detecting and Tracking Nonfluorescent Nanoparticle Probes in Live Cells. Imaging and Spectroscopic Analysis of Living Cells: Optical and Spectroscopic Techniques. 504:83-108. abstract
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Ha J W; Sun W; Stender A S; Fang N . 2012. Dual-Wavelength Detection of Rotational Diffusion of Single Anisotropic Nanocarriers on Live Cell Membranes. Journal of Physical Chemistry C. 116:2766-2771. abstract
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Bose S; Barnes C A; Petrich J W . 2012. Enhanced stability and activity of cellulase in an ionic liquid and the effect of pretreatment on cellulose hydrolysis. Biotechnology and Bioengineering. 109:434-443. abstract
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Ma C B; Yeung E S; Qi S D; Han R . 2012. Highly sensitive detection of microRNA by chemiluminescence based on enzymatic polymerization. Analytical and Bioanalytical Chemistry. 402:2217-2220. abstract
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Sun W; Gu Y; Wang G F; Fang N . 2012. Dual-Modality Single Particle Orientation and Rotational Tracking of Intracellular Transport of Nanocargos. Analytical Chemistry. 84:1134-1138. abstract
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Carlson P J; Bose S; Armstrong D W; Hawkins T; Gordon M S; Petrich J W . 2012. Structure and Dynamics of the 1-Hydroxyethyl-4-amino-1,2,4-triazolium Nitrate High-Energy Ionic Liquid System. Journal of Physical Chemistry B. 116:503-512. abstract
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2011
Lupoi J S; Smith E A . 2011. Evaluation of Nanoparticle-Immobilized Cellulase for Improved Ethanol Yield in Simultaneous Saccharification and Fermentation Reactions. Biotechnology and Bioengineering. 108:2835-2843. abstract
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Meyer M W; Lupoi J S; Smith E A . 2011. 1064 nm dispersive multichannel Raman spectroscopy for the analysis of plant lignin. Analytica Chimica Acta. 706:164-170. abstract
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Liu C; Luo Y; Maxwell E J; Fang N; Chen D D Y . 2011. Potential of Two-Dimensional Electro-Fluid-Dynamic Devices for Continuous Purification of Multiple Components from Complex Samples. Analytical Chemistry. 83:8208-8214. abstract
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