使用低温水热法在Si衬底上生长ZnO纳米棒阵列.通过X射线衍射和扫描电子显微镜对ZnO纳米棒的结晶性和形貌进行观测.结果表明,六棱柱形ZnO纳米棒沿c轴方向的阵列性良好,且均匀致密的生长在衬底上.室温光致发光谱表明应用低温水热法可以得到光学性质良好的ZnO纳米棒阵列.使用同步辐射对ZnO纳米棒阵列的氧K带边进行X射线吸收近带边谱测量,研究了不同半径ZnO纳米棒阵列的局部电子结构及其半径对电子结构的影响.另外,对ZnO纳米棒及ZnO薄膜的局部电子结构进行了对比研究.
ZnO nanorod arrays were grown on Si substrate utilizing low-temperature hydrothermal method. The X-ray diffraction (XRD) and scanning electron microscope (SEM) measurements were carried out to investigate the crystalline and morphology of the as-grown ZnO nanorods. Results indicate that the hexagonal prism ZnO nanorod arrays are well-aligned along the c-axis and distribute densely and uniformly on the substrate. The room temperature photoluminescence (PL) spectra demonstrate that high optical quality ZnO nanorod arrays could be achieved by this low temperature hydrothermal process. X-ray absorption near-edge spectroscopy (XANES) measurements at O K-edge were carried out with synchrotron radiation to investigate the local electronic structure of ZnO nanorod arrays with different diameter, and the electronic structure dependence on the diameter was discussed. In addition, the contrast of local electric structure for ZnO nanorods and thin film were also discussed.
参考文献
| [1] | Huang M H,Mao S,Feick H,et al.Room-temperature ultraviolet nanowire nanolasers.Science,2001,292(5523):1897-1899. |
| [2] | Holmes J D,Johnston K P,Doty R C,et al.Control of thickness and orientation of solution-grown silicon nanowires.Science,2000,287(5457):1471-1473. |
| [3] | Park W I,Yi G C.Electroluminescence in n-ZnO nanorod arrays vertically grown on p-GaN.Adv.Mater.,2004,16(1):87-90. |
| [4] | Tien L C,Sadik P W,Norton D P,et al.Hydrogen sensing at room temperature with Pt-coated ZnO thin films and nanorods.Appl.Phys.Lett.,2005,87(22):222106-1-3. |
| [5] | Lee J S,Islam M S,Kim S.Direct formation of catalyst-free ZnO nanobridge devices on an etched Si substrate using a thermal evaporation method.Nano Lett.,2006,6(7):1487-1490. |
| [6] | Lao C S,Liu J,Gao P X,et al.ZnO nanobelt/nanowire Schottky diodes formed by dielectrophoresis alignment across Au electrodes.Nano Lett.,2006,6(2):263-266. |
| [7] | Keem K,Jeong D Y,Kim S,et al.Fabrication and device characterization of omega-shaped-gate ZnO nanowire field-effect transistors.Nano Lett.,2006,6(7):1454-1458. |
| [8] | Wang Z L.ZnO nanowire and nanobelt platform for aanotechnology.Mater.Sci.Eng.R,2009,64(3/4):33-71. |
| [9] | Robin I C,Marotel P,El-Shaer A H,et al.Compared optical properties of ZnO heteroepitaxial,homoepitaxial 2D layers and nanowires.J.Cryst.Growth,2009,311(7):2172-2175. |
| [10] | Yu D Q,Hu L Z,Li J,et al.Catalyst-free synthesis of ZnO nanorod arrays on InP (001) substrate by pulsed laser deposition.Mater.Lett.,2008,62(25):4063-4065. |
| [11] | Sun Y L,Bian J M,Li Q W,et al.Effects of substrate on the struc-ture,morphology and optical properties of vertically aligned ZnOnanorods arrays grown by 1ow-temperature CBD method.J.Inorg.Mater.,2010,25(10):1115-1120. |
| [12] | Guo J H,Vayssieres L,Persson C,et al.Polarization-dependent soft-X-ray absorption of highly oriented ZnO microrod arrays.J.Phys.:Condens.Matter.,2002,14(28):6969-6974. |
| [13] | Sham T K,Rivers M L.A brief overview of synchrotron radiation.Rev.Mineral.Geochem.,2002,49(1):117-147. |
| [14] | Chiou J W,Jan J C,Tsai H M,et al.Electronic structure of ZnOnanorods studied by angle-dependent X-ray absorption spectros-copy and scanning photoelectron microscopy.Appl.Phys.Lett.,2004,84(18):3462-3464. |
| [15] | Vaithianathan V,Lee B T,Chang C H,et al.Characterization ofAs-doped,p-type ZnO by X-ray absorption near-edge structurespectroscopy.Appl.Phys.Lett.,2006,88(11):112103-1-3. |
| [16] | Fons P,Nakahara K,Yamada A,et al.A XANES study of Cu valency in Cu-Doped Epitaxial ZnO.Phys.Stat.Sol.(b),2002,229(2):849-852. |
| [17] | Xu S,Lao C S,Weintraub B,et al.Density-controlled growth of aligned ZnO nanowire arrays by seedless chemical approach on smooth surfaces printer-friendly.J.Mater.Res.,2008,23(8):2072-2077. |
| [18] | Chiou J W,Kumar K P,Jan J C,et al.Diameter dependence of the electronic structure of ZnO nanorods determined by X-ray absorption spectroscopy and scanning photoelectron microscopy.Appl.Phys.Lett.,2004,85(15):3220-3222. |
| [19] | Dong C L,Persson C,Vayssieres L,et al.Electronic structure of nanostructured ZnO from X-ray absorption and emission spectroscopy and the local density approximation.Phys.Rev.B,2004,70(19):195325-1-5. |
| [20] | Bian J M,Li X M,Gao X D,et al.Deposition and electrical properties of N-In codoped p-type ZnO films by ultrasonic spray pyrolysis.Appl.Phys.Lett.,2004,84(4):541-543. |
| [21] | Sun Y,Ketterson J B,Wong G K.Excitonic gain and stimulated ultraviolet emission hi nanocrystalline zinc-oxide powder.Appl.Phys.Lett.,2000,77(15):2322-2324. |
| [22] | Bylander E G.Surface effects on thc iow-energy cathodoluminescence of Zinc oxide.J.Appl.Phys.,1978,49(3):1188-1195. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%