01822nas a2200217   4500008004100000022001400041245010200055210006900157260007100226300001600297490000800313520099800321100002501319700002401344700002101368700002301389700002201412700002001434700002201454856012801476       2006                        eng d  a1520-610600aZnO multipods, submicron wires, and spherical structures and their unique field emission behavior0 aZnO multipods submicron wires and spherical structures and their  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a18236-182420 v1103 a<p>A simple method of vapor deposition for the shape selective synthesis of ZnO structures, namely, multipods, submicron wires, and spheres, has been successfully demonstrated. A plausible growth mechanism based on the studies of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) is proposed. Our studies suggest that the growth of a multipod structure is governed by the screw dislocation propagation while the vapor-liquid-solid (VLS) mechanism is responsible for the formation of submicron wires and spheres. Moreover, the flow rate of the carrier gas plays a crucial role in governing the morphology. Further, these structures exhibit an enhanced field emission behavior. The nonlinearity in the Fowler-Nordheim (F-N) plot, a characteristic feature of electron emission from semiconductors, is explained by considering the contributions from both the conduction and the valence bands of ZnO.</p>1 aRamgir, Niranjan, S.1 aLate, Dattatray, J.1 aBhise, Ashok, B.1 aMore, Mahendra, A.1 aMulla, Imtiaz, S.1 aJoag, Dilip, S.1 aVijayamohanan, K.  uhttps://library.ncl.res.in/content/zno-multipods-submicron-wires-and-spherical-structures-and-their-unique-field-emission-0