X-Ray Diffraction

doi:10.1038/233506A0

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X-Ray Diffraction

Journal Article•DOI•

X-Ray Diffraction

01 Oct 1971-Nature (Nature Publishing Group)-Vol. 233, Iss: 5320, pp 506-506

TL;DR: Lipson and Steeple as mentioned in this paper interpreted X-ray powder diffraction patterns and found that powder-diffraction patterns can be represented by a set of 3-dimensional planes.

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Abstract: Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.

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Journal Article•DOI•

Structure of lipid bilayers

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John F. Nagle¹, Stephanie Tristram-Nagle¹•Institutions (1)

Carnegie Mellon University¹

10 Nov 2000-Biochimica et Biophysica Acta

TL;DR: The uncertainty in structural results for lipid bilayers is being reduced and best current values are provided for bilayers of five lipids.

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2,497 citations

Cites background or result from "X-Ray Diffraction"

...The beginning of liquid crystallography was a remarkably succinct three page paper by Caillë [74], communicated to the French Academy of Sciences by Guinier....
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...Applied to a one-dimensional stack of bilayers, Guinier's theory of disorder of the second kind is the same as the paracrystalline theory of Hosemann [78]....
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...The Caillé theory [74] also treats fluctuations of the second kind, but it is considerably different from the earlier theories [77,78]....
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...Before Caillë's paper [74], Guinier [77] had elucidated the important distinction between disorder of the ¢rst and second kind, and emphasized that disorder of the second kind destroys crystalline longrange order....
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...Before Caillé's paper [74], Guinier [77] had elucidated the important distinction between disorder of the first and second kind, and emphasized that disorder of the second kind destroys crystalline long-range order....
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Journal Article•DOI•

Lattice-strain control of the activity in dealloyed core–shell fuel cell catalysts

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Peter Strasser¹, Peter Strasser², Shirlaine Koh², Toyli Anniyev³, Jeffrey Greeley⁴, Karren L. More⁵, Chengfei Yu², Zengcai Liu², Sarp Kaya³, Dennis Nordlund³, Hirohito Ogasawara³, Michael F. Toney³, Anders Nilsson³ - Show less +9 more•Institutions (5)

Technical University of Berlin¹, University of Houston², SLAC National Accelerator Laboratory³, Argonne National Laboratory⁴, Oak Ridge National Laboratory⁵

01 Jun 2010-Nature Chemistry

TL;DR: It is shown how lattice strain can be used experimentally to tune the catalytic activity of dealloyed bimetallic nanoparticles for the oxygen-reduction reaction, a key barrier to the application of fuel cells and metal-air batteries.

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Abstract: Electrocatalysis will play a key role in future energy conversion and storage technologies, such as water electrolysers, fuel cells and metal-air batteries. Molecular interactions between chemical reactants and the catalytic surface control the activity and efficiency, and hence need to be optimized; however, generalized experimental strategies to do so are scarce. Here we show how lattice strain can be used experimentally to tune the catalytic activity of dealloyed bimetallic nanoparticles for the oxygen-reduction reaction, a key barrier to the application of fuel cells and metal-air batteries. We demonstrate the core-shell structure of the catalyst and clarify the mechanistic origin of its activity. The platinum-rich shell exhibits compressive strain, which results in a shift of the electronic band structure of platinum and weakening chemisorption of oxygenated species. We combine synthesis, measurements and an understanding of strain from theory to generate a reactivity-strain relationship that provides guidelines for tuning electrocatalytic activity.

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2,375 citations

Journal Article•DOI•

New generation adsorbents for water treatment.

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Imran Ali¹•Institutions (1)

Jamia Millia Islamia¹

25 Jun 2012-Chemical Reviews

1,531 citations

Journal Article•DOI•

Light-Emitting Self-Assembled Materials Based on d(8) and d(10) Transition Metal Complexes.

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Vivian Wing-Wah Yam¹, Vonika Ka-Man Au¹, Sammual Yu-Lut Leung¹•Institutions (1)

University of Hong Kong¹

09 Jul 2015-Chemical Reviews

1,133 citations

Journal Article•DOI•

Barrel-Stave Model or Toroidal Model? A Case Study on Melittin Pores

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Lin Yang¹, Thad A. Harroun¹, Thomas M. Weiss¹, Lai Ding¹, Huey W. Huang¹ - Show less +1 more•Institutions (1)

Rice University¹

01 Sep 2001-Biophysical Journal

TL;DR: It is concluded that, among naturally produced peptides that are investigated, only alamethicin conforms to the barrel-stave model, and other peptides, including magainins, melittin and protegrins, all appear to induce transmembrane pores that conform to the toroidal model.

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1,013 citations

Cites background from "X-Ray Diffraction"

...…by the theory of scattering from a two-dimensional fluid (Yang et al., 1999): where the scattering intensityI00(0, qr) has been normalized to one pore (Warren, 1969) and the subscript 00 indicates that the density correlations (that give rise to the scattering) are within one individual bilayer....
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...One might be tempted to conclude from the DMPC example that melittin is inserted perpendicularly in fluid bilayers but adsorbs parallel to the surface of gel-phase bilayers, but this is not a general rule....
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