caa a22 4500 463215575 CHVBK 20180405153155.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3887-y doi (NATIONALLICENCE)springer-10.1007/s00339-007-3887-y One-dimensional gallium nitride micro/nanostructures synthesized by a space-confined growth technique [Elektronische Daten] [X. Xiang, H. Zhu] Hexagonal GaN prismatic sub-micro rods and cone nanowires have been synthesized in a large scale by a novel and controllable space-confined growth method. The as-synthesized GaN products are highly crystalline with a wurtzite structure. The prismatic rods have lengths of 15∼20μm and diameters of 400∼500nm enclosed by hexagonal smooth side surfaces and a pyramidal end. And the cone nanowires have average diameters of 150∼200nm and lengths up to several tens of μm with a cone tip. The photoluminescence (PL) studies reveal prominent band-gap UV emission properties of GaN products and narrow FWHM, indicating the excellent luminescent performance and high crystal quality. For field emission characteristic of GaN nanowires, the turn-on field is about 9.5V/μm and the current density reaches 1.0mA/cm2 at an electric field of 18V/ μm. The contrast experiments indicate a novel growth control can be achieved by using a graphite tube as reaction vessel. The sealed graphite tube combined with metallic initiator is greatly responsible for large-scale and uniform preparation of GaN prismatic rods and cone nanowires. Highly symmetric GaN hexagonal micropyramids are grown on a bare Si substrate. The growth mechanism and the control function of the graphite tube are demonstrated. These low-dimensional structures not only enrich semiconducting GaN family, but also are good building blocks for optoelectronic devices. Springer-Verlag, 2007 Xiang X. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, 100029, Beijing, P.R. China aut Zhu H. Research Center of Materials Science, Beijing Institute of Technology, 100081, Beijing, P.R. China aut Applied Physics A Springer-Verlag 87/4(2007-06-01), 651-659 0947-8396 87:4<651 2007 87 339 https://doi.org/10.1007/s00339-007-3887-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3887-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xiang X. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, 100029, Beijing, P.R. China aut NATIONALLICENCE 700 1- Zhu H. Research Center of Materials Science, Beijing Institute of Technology, 100081, Beijing, P.R. China aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/4(2007-06-01), 651-659 0947-8396 87:4<651 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer