Advance online publication
The latest research papers, published online ahead of print. These online versions are definitive and may be cited using the digital object identifier (DOI).
About advance online publicationLetters
Exceptionally large positive and negative anisotropic thermal expansion of an organic crystalline material
Dinabandhu Das, Tia Jacobs & Leonard J. Barbour
Published online: 22 November 2009 | doi:10.1038/nmat2583
Occasionally, organic crystalline materials contract when heated (negative thermal expansion), and the mechanisms responsible for this phenomenon are poorly understood. The arrangement of dumbbell-shaped molecules in an organic material is shown to give rise to its negative thermal expansion. The packing and intermolecular interactions facilitate a cooperative mechanical response to temperature causing a decrease in lattice dimensions.
First Paragraph - Exceptionally large positive and negative anisotropic thermal expansion of an organic crystalline material | Full Text - Exceptionally large positive and negative anisotropic thermal expansion of an organic crystalline material | PDF (453 KB) - Exceptionally large positive and negative anisotropic thermal expansion of an organic crystalline material | Supplementary information
Liquid-gated interface superconductivity on an atomically flat film
J. T. Ye, S. Inoue, K. Kobayashi, Y. Kasahara, H. T. Yuan, H. Shimotani & Y. Iwasa
Published online: 22 November 2009 | doi:10.1038/nmat2587
Using a liquid gate has allowed electrically induced superconductivity in a solid specimen by means of carrier accumulation on the surface. But this phenomenon was limited to materials that became superconductors at low carrier density. It is now shown that superconductivity can be induced in a much wider range of materials by using an ionic liquid.
First Paragraph - Liquid-gated interface superconductivity on an atomically flat film | Full Text - Liquid-gated interface superconductivity on an atomically flat film | PDF (2,753 KB) - Liquid-gated interface superconductivity on an atomically flat film | Supplementary information
Gel-expanded to gel-condensed transition in neurofilament networks revealed by direct force measurements
Roy Beck, Joanna Deek, Jayna B. Jones & Cyrus R. Safinya
Published online: 15 November 2009 | doi:10.1038/nmat2566
Liquid-crystal gel networks of neurofilament assemblies play a key part in the mechanical stability of neuronal processes, and disruptions in the networks are a hallmark of motor-neuron diseases. Under pressure, these networks are shown to undergo an abrupt transition from expanded to condensed states, with distinct mechanical properties, helping to explain possible disruption mechanisms.
First Paragraph - Gel-expanded to gel-condensed transition in neurofilament networks revealed by direct force measurements | Full Text - Gel-expanded to gel-condensed transition in neurofilament networks revealed by direct force measurements | PDF (2,024 KB) - Gel-expanded to gel-condensed transition in neurofilament networks revealed by direct force measurements | Supplementary information
Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams
Mark E. Siemens, Qing Li, Ronggui Yang, Keith A. Nelson, Erik H. Anderson, Margaret M. Murnane & Henry C. Kapteyn
Published online: 08 November 2009 | doi:10.1038/nmat2568
According to Fourier theory, thermal transport is a diffusive process. However, this cannot be the case at length scales smaller than the mean free path of the energy carriers. The first experimental study of thermal transport at the nanoscale is now reported in the case of a point-like heat source, providing a quantitative description of the transition between the ballistic and diffusive regimes.
First Paragraph - Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams | Full Text - Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams | PDF (806 KB) - Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams | Supplementary information
Articles
Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn2+ quantum nanoribbons
Jung Ho Yu, Xinyu Liu, Kyoung Eun Kweon, Jin Joo, Jiwon Park, Kyung-Tae Ko, Dong Won Lee, Shaoping Shen, Kritsanu Tivakornsasithorn, Jae Sung Son, Jae-Hoon Park, Young-Woon Kim, Gyeong S. Hwang, Margaret Dobrowolska, Jacek K. Furdyna & Taeghwan Hyeon
Published online: 15 November 2009 | doi:10.1038/nmat2572
Synthesizing magnetic nanostructures, which could potentially be used in spintronic applications, is quite challenging owing to the difficulty in incorporating magnetic impurities in a non-magnetic matrix. It is now shown that up to 10% Mn can be incorporated in CdSe nanoribbons by nucleation-controlled doping, giving rise to very strong magnetic effects.
Abstract - Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn: 2+: quantum nanoribbons | Full Text - Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn2+ quantum nanoribbons | PDF (1,995 KB) - Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn2+ quantum nanoribbons | Supplementary information
Nanostructured arrays of semiconducting octahedral molecular sieves by pulsed-laser deposition
Anais E. Espinal, Lichun Zhang, Chun-Hu Chen, Aimee Morey, Yuefeng Nie, Laura Espinal, Barrett O. Wells, Raymond Joesten, Mark Aindow & Steven L. Suib
Published online: 01 November 2009 | doi:10.1038/nmat2567
Molecular sieves made out of cryptomelane-type manganese oxide (OMS-2) have been widely studied, but synthesizing them with a hierarchical nanostructure and precise crystal orientation is very challenging. It is now demonstrated that pulsed-laser deposition of OMS-2 on SrTiO3 leads to the spontaneous formation of three-dimensional arrays of parallel and inclined fibres. The results open the way for lattice-engineered synthesis of multilayer materials.
Abstract - Nanostructured arrays of semiconducting octahedral molecular sieves by pulsed-laser deposition | Full Text - Nanostructured arrays of semiconducting octahedral molecular sieves by pulsed-laser deposition | PDF (1,566 KB) - Nanostructured arrays of semiconducting octahedral molecular sieves by pulsed-laser deposition | Supplementary information
Material properties of the cell dictate stress-induced spreading and differentiation in embryonic stem cells
Farhan Chowdhury, Sungsoo Na, Dong Li, Yeh-Chuin Poh, Tetsuya S. Tanaka, Fei Wang & Ning Wang
Published online: 18 October 2009 | doi:10.1038/nmat2563
Soft embryonic stem cells respond to small localized forces by increasing cell protrusion and spreading; in contrast, cells that are differentiated from them—which are ten times stiffer—do not spread. The deformation of the cell cytoskeleton is thus shown to be an important determinant of cellular response to force.
Abstract - Material properties of the cell dictate stress-induced spreading and differentiation in embryonic stem cells | Full Text - Material properties of the cell dictate stress-induced spreading and differentiation in embryonic stem cells | PDF (535 KB) - Material properties of the cell dictate stress-induced spreading and differentiation in embryonic stem cells | Supplementary information
Until print versions of AOP papers are published, they should be cited in the style "Author(s) Nature Materials advance online publication, day month year (doi:10.1038/nmatXXXXX)". Once the print version (identical to the AOP) is published, it should be cited as follows: "Author(s) Nature Materials volume, page (year); advance online publication, (doi:10.1038/nmatXXXXX)".
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