Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 14 August 1998:
Vol. 281. no. 5379, pp. 969 - 971
DOI: 10.1126/science.281.5379.969
Prev | Table of Contents | Next

Reports

Imperfect Oriented Attachment: Dislocation Generation in Defect-Free Nanocrystals

R. Lee Penn, Jillian F. Banfield *

Dislocations are common defects in solids, yet all crystals begin as dislocation-free nuclei. The mechanisms by which dislocations form during early growth are poorly understood. When nanocrystalline materials grow by oriented attachment at crystallographically specific surfaces and there is a small misorientation at the interface, dislocations result. Spiral growth at two or more closely spaced screw dislocations provides a mechanism for generating complex polytypic and polymorphic structures. These results are of fundamental importance to understanding crystal growth.

R. L. Penn, Materials Science Program, University of Wisconsin-Madison, Madison, WI 53706, USA. J. F. Banfield, Mineralogical Institute, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan. E-mail: jill{at}min.s.u-tokyo.ac.jp
*   To whom correspondence should be addressed. Permanent address: Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI 53706, USA.

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Watching Nanocrystals Grow.
C. B. Murray (2009)
Science 324, 1276-1277
   Abstract »    Full Text »    PDF »
Thermal decomposition of calcite: Mechanisms of formation and textural evolution of CaO nanocrystals.
C. Rodriguez-Navarro, E. Ruiz-Agudo, A. Luque, A. B. Rodriguez-Navarro, and M. Ortega-Huertas (2009)
American Mineralogist 94, 578-593
   Abstract »    Full Text »    PDF »
Formation of aragonite mesocrystals and implication for biomineralization.
G.-T. Zhou, Q.-Z. Yao, J. Ni, and G. Jin (2009)
American Mineralogist 94, 293-302
   Abstract »    Full Text »    PDF »
Structure, Chemistry, and Properties of Mineral Nanoparticles.
G. A. Waychunas and H. Zhang (2008)
Elements 4, 381-387
   Abstract »    Full Text »    PDF »
Hydrothermal synthesis of hematite spherules and jarosite: Implications for diagenesis and hematite spherule formation in sulfate outcrops at Meridiani Planum, Mars.
D.C. Golden, D.W. Ming, R.V. Morris, and T.G. Graff (2008)
American Mineralogist 93, 1201-1214
   Abstract »    Full Text »    PDF »
Nanominerals, Mineral Nanoparticles, and Earth Systems.
M. F. Hochella Jr., S. K. Lower, P. A. Maurice, R. L. Penn, N. Sahai, D. L. Sparks, and B. S. Twining (2008)
Science 319, 1631-1635
   Abstract »    Full Text »    PDF »
Atomic structure and formation mechanism of (301) rutile twins from Diamantina (Brazil).
N. Daneu, H. Schmid, A. Recnik, and W. Mader (2007)
American Mineralogist 92, 1789-1799
   Abstract »    Full Text »    PDF »
XRD and HRTEM analyses of stacking structures in sudoite, di-trioctahedral chlorite.
J. Kameda, R. Miyawaki, R. Kitagawa, and T. Kogure (2007)
American Mineralogist 92, 1586-1592
   Abstract »    Full Text »    PDF »
Determination of layer stacking microstructures and intralayer transition of illite polytypes by high-resolution transmission electron microscopy (HRTEM).
T. Chen and H. Wang (2007)
American Mineralogist 92, 926-932
   Abstract »    Full Text »    PDF »
Precipitation and Growth Morphology of Calcium Carbonate Induced by Myxococcus Xanthus: Implications for Recognition of Bacterial Carbonates.
K. B. Chekroun, C. Rodriguez-Navarro, M. T. Gonzalez-Munoz, J. M. Arias, G. Cultrone, and M. Rodriguez-Gallego (2004)
Journal of Sedimentary Research 74, 868-876
   Abstract »    Full Text »    PDF »
PERTURBATIVE THEORY OF MICA POLYTYPISM. ROLE OF THE M2 LAYER IN THE FORMATION OF INHOMOGENEOUS POLYTYPES.
M. Nespolo and M. Nespolo (2001)
Clays and Clay Minerals 49, 1-23
   Abstract »    Full Text »    PDF »
Aggregation-Based Crystal Growth and Microstructure Development in Natural Iron Oxyhydroxide Biomineralization Products.
J. F. Banfield, S. A. Welch, H. Zhang, T. T. Ebert, and R. L. Penn (2000)
Science 289, 751-754
   Abstract »    Full Text »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)