Solid-State NMR of Complex Materials

Personnel

Project Leader(s):
Klaus Schmidt-Rohr

Principal Investigators:
Mei Hong, Evgenii Levin, Klaus Schmidt-Rohr

Postdoctoral Research Associates:
Bosiljka Njegic, Aditya Rawal

Overview

This project develops and applies advanced solid-state nuclear magnetic resonance (NMR) techniques to elucidate the structure and dynamics of complex organic, nanocomposite, and semiconductor materials. Systems of particular interest include bioinspired nanocomposites (in collaboration with the Project on Bioinspired Materials), nanostructured polymer-based fuel-cell membranes, and complex tellurides for photovoltaics, data storage, and thermoelectrics (in collaboration with Bruce Cook, Ames Laboratory).

We study nanocomposites of Nafion with modified side groups and with silica or zirconium phosphate nanoparticles grown in situ, developed to improve fuel-cell operation at higher temperatures. This extends our investigations to the biological nanocomposites in enamel and biosilicas.

Highlights

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Publications

2012
Schmidt-Rohr K; Fritzsching K J; Liao S Y; Hong M . 2012. Spectral editing of two-dimensional magic-angle-spinning solid-state NMR spectra for protein resonance assignment and structure determination. Journal of Biomolecular NMR. 54:343-353. abstract
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Ma X; Klosterman L; Hu Y Y; Liu X P; Schmidt-Rohr K; Mallapragada S; Akinc M . 2012. Aqueous Route Synthesis of Mesoporous ZrO2 by Agarose Templation. Journal of the American Ceramic Society. 95:3455-3462. abstract
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Dick-Perez M; Wang T; Salazar A; Zabotina O A; Hong M . 2012. Multidimensional solid-state NMR studies of the structure and dynamics of pectic polysaccharides in uniformly C-13-labeled Arabidopsis primary cell walls. Magnetic Resonance in Chemistry. 50:539-550. abstract
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Levin E M; Bud'ko S L; Schmidt-Rohr K . 2012. Enhancement of Thermopower of TAGS-85 High-Performance Thermoelectric Material by Doping with the Rare Earth Dy. Advanced Functional Materials. 22:2766-2774. abstract
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Harris D M; Corbin K; Wang T; Gutierrez R; Bertolo A L; Petti C; Smilgies D M; Estevez J M; Bonetta D; Urbanowicz B R; Ehrhardt D W; Somerville C R; Rose J K C; Hong M; DeBolt S . 2012. Cellulose microfibril crystallinity is reduced by mutating C-terminal transmembrane region residues CESA1(A903V) and CESA3(T942I) of cellulose synthase. Proceedings of the National Academy of Sciences of the United States of America. 109:4098-4103. abstract
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Nielsen M D; Levin E M; Jaworski C M; Schmidt-Rohr K; Heremans J P . 2012. Chromium as resonant donor impurity in PbTe. Physical Review B. 85:045210. abstract
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Levin E M; Chen Q; Bud'ko S L . 2012. Magnetism, optical absorbance, and 19F NMR spectra of nafion films with self-assembling paramagnetic networks. Journal of Polymer Science Part B-Polymer Physics. 50:129-138. abstract
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2011
Levin E M; Bud'ko S L . 2011. Bulk magnetization and H-1 NMR spectra of magnetically heterogeneous model systems. Journal of Magnetism and Magnetic Materials. 323:2355-2361. abstract
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Hu Y Y; Schmidt-Rohr K . 2011. Technical aspects of fast magic-angle turning NMR for dilute spin-1/2 nuclei with broad spectra. Solid State Nuclear Magnetic Resonance. 40:51-59. abstract
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Hu Y Y; Liu X P; Ma X; Rawal A; Prozorov T; Akinc M; Mallapragada S K; Schmidt-Rohr K . 2011. Biomimetic Self-Assembling Copolymer-Hydroxyapatite Nanocomposites with the Nanocrystal Size Controlled by Citrate. Chemistry of Materials. 23:2481-2490. abstract
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