Browsing by Subject "Size dependent"

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    ItemOpen Access
    Iterative size reduction technique for optical nanostructures
    (Optical Society of America, 2012) Khudiyev, Tural; Bayındır, Mehmet
    One-dimensional optical nanostructures are mass produced from a macroscopic semiconductor rod by using a new top-to-bottom fabrication approach. These nanostructures, which can be easily scaled up to 2D and 3D, exhibit sizedependent double coloration mechanisms. © OSA 2012.
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    ItemOpen Access
    Macroscopic photoconductive nanowire arrays
    (IEEE, 2011) Bayındır, Mehmet; Yaman, Mecit; Özgür, Erol; Aktaş, Ozan; Khudiyev, Tural; Kanık, Mehmet; Deniz, Hakan
    A novel high-throughput fabrication technique to produce polymer embedded functional chalcogenide nanowire arrays is demonstrated. Indefinitely-long selenium nanowire arrays are obtained and their size dependent photoconductivity is investigated. Logarithmic increase in photo-conductance is observed. © 2011 IEEE.
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    Spintronic properties of zigzag-edged triangular graphene flakes
    (AIP Publishing LLC, 2010) Şahin, H.; Senger, R. T.; Çıracı, Salim
    We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular graphene flakes have large magnetic moments which vary with the number of hydrogen atoms terminating its edge atoms and scale with its size. Electronic transmission and current-voltage characteristics of these flakes, when contacted with metallic electrodes, reveal spin valve and remarkable rectification features. The transition from ferromagnetic to antiferromagnetic state under bias voltage can, however, terminate the spin polarizing effects for specific flakes. Geometry and size dependent transport properties of graphene flakes may be crucial for spintronic nanodevice applications.