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  • Title: Zero thermal expansion in a nanostructured inorganic-organic hybrid crystal.
    Author: Zhang Y, Islam Z, Ren Y, Parilla PA, Ahrenkiel SP, Lee PL, Mascarenhas A, McNevin MJ, Naumov I, Fu HX, Huang XY, Li J.
    Journal: Phys Rev Lett; 2007 Nov 23; 99(21):215901. PubMed ID: 18233229.
    Abstract:
    There are very few materials that exhibit zero thermal expansion (ZTE), and of these even fewer are appropriate for electronic and optoelectronic applications. We find that a multifunctional crystalline hybrid inorganic-organic semiconductor, beta-ZnTe(en)(0.5) (en denotes ethylenediamine), shows uniaxial ZTE in a very broad temperature range of 4-400 K, and concurrently possesses superior electronic and optical properties. The ZTE behavior is a result of compensation of contraction and expansion of different segments along the inorganic-organic stacking axis. This work suggests an alternative route to designing materials in a nanoscopic scale with ZTE or any desired positive or negative thermal expansion (PTE or NTE), which is supported by preliminary data for ZnTe(pda)(0.5) (pda denotes 1,3-propanediamine) with a larger molecule.
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