Less is more: A holey grail of materials science

Moss, Steve
May 2013
MRS Bulletin;May2013, Vol. 38 Issue 5, p431
Trade Publication
The article offers the author's insights on nothingness that holey defects and holey material including vacancies, porosity and aerogels are mode of that are familiar to materials researchers. He says that some vacancies produce color centers such as alkali halides and electrons trapped at vacancy sites. He mentions that another class of holey material are aerogels that benefit from the integration of nothing.


Related Articles

  • A vibrational model of F centres in alkali halides. Salis, M. // European Physical Journal B -- Condensed Matter;Jul2003, Vol. 34 Issue 1, p47 

    Presents a study on a model of F centres in alkali halides. Proper mass of electrons trapped in F centres; Effect of introducing impurity atoms on a crystal; Equation for the calculation of F-band absorption energies of alkali halides belonging to sodium chloride structures.

  • Effect of post-irradiation deformation on the tl of Cu++ doped nacl crystals. Dubey, K. K.; Nayar, V. // Recent Research in Science & Technology;Aug2012, Vol. 4 Issue 8, p39 

    The effect of post, irradiation deformation on the TL of γ-irradiated undoped and Cu++ doped NaCl crystals for different impurity concentrations and radiation doses have been studied. In the case of post-irradiation deformation, the two TL peak are found for γ-irradiated undoped and Cu++...

  • Electron inelastic mean free path and stopping power modelling in alkali halides in the 50 eV–10 keV energy range. Boutboul, T.; Akkerman, A.; Breskin, A.; Chechik, R. // Journal of Applied Physics;5/1/1996, Vol. 79 Issue 9, p6714 

    Presents information on a study that described a theoretical model for calculating the inelastic mean free path and the stopping power of an electron moving within an alkali halide. Experimental procedure; Results and discussion on the study; Conclusions.

  • Construction principle for stable multiply-negative charged molecular systems. Part II. Triply-negative charged systems. Scheller, M. K.; Cederbaum, L. S. // Journal of Chemical Physics;6/15/1994, Vol. 100 Issue 12, p8943 

    Following a recently introduced construction principle, triply-negative charged compounds are designed and investigated. The specific series of systems discussed are M2X3-5 alkali and M2X3-7 earth alkali halides. For the highly ionic members in these series considerable evidence for their...

  • Construction principle for stable multiply-negative charged molecular systems. Part I. Doubly-negative charged systems. Scheller, M. K.; Cederbaum, L. S. // Journal of Chemical Physics;6/15/1994, Vol. 100 Issue 12, p8934 

    The existence of free dianionic M2X2-4 alkali halides which are designed according to a recently introduced construction principle is discussed. The systems are found to be highly ionic. Considerable evidence for their stability to fragmentation and to electron autodetachment is predicted at...

  • Characteristics of F centers in the ground and excited states in alkali halide crystals. Varaksin, A. N.; Sobolev, A. B.; Panov, V. G. // Physics of the Solid State;Mar2006, Vol. 48 Issue 3, p453 

    The molecular-statics method and the Gourary-Adrian approach are used to calculate the displacements of the lattice ions nearest to the F center in alkali halide crystals with NaCl and CsCl structures (altogether, twenty crystals). The calculations are performed for the 1 s and 2 p states of the...

  • Escape length of ultraviolet induced photoelectrons in alkali iodide and CsBr evaporated films... Boutboul, T.; Akkerman, A.; Breskin, A.; Chechik, R. // Journal of Applied Physics;9/1/1998, Vol. 84 Issue 5, p2890 

    Focuses on the measurment of the escape length of electrons photoinduced from thin alkali halide films. Lengths recorded; Enhancement of photoemission efficiency; Methodology of the experiment; Alkali films as elements of gas avalanche photon detectors.

  • F center deexcitation induced by local vibration tunneling. Gomes, L.; Morato, S. P. // Journal of Applied Physics;9/15/1989, Vol. 66 Issue 6, p2754 

    Describes a concept of electronic deexcitation of defects for systems where the electron couples with a local lattice mode. Discussion on measured activation energies; Details on alkali halides.

  • Interionic potentials in alkali halides. Patil, S. H. // Journal of Chemical Physics;1/1/1987, Vol. 86 Issue 1, p313 

    Analytic expressions are obtained for the Coulomb and exchange energies in alkali halides, incorporating the correct asymptotic behavior of electron densities. We have also introduced suitable damping factors for the polarizability and van der Waals terms. This allows us to obtain accurate...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics