I. Hochbaum and P. Yang, Semiconductor Nanowires for Energy Conversion, Chemical Reviews, vol.110, issue.1, pp.527-546, 2009.
DOI : 10.1021/cr900075v

T. Nagashima, K. Yanagida, M. Oka, T. Taniguchi, J. Kawai et al., Resistive Switching Multistate Nonvolatile Memory Effects in a Single Cobalt Oxide Nanowire, Nano Letters, vol.10, issue.4, pp.1359-1363, 2010.
DOI : 10.1021/nl9042906

W. Boettcher, J. M. Spurgeon, M. C. Putnam, E. L. Warren, D. B. Turner-evans et al., Energy-Conversion Properties of Vapor-Liquid-Solid-Grown Silicon Wire-Array Photocathodes, Science, vol.8, issue.10, pp.185-187, 2010.
DOI : 10.1021/nl801234y

Y. Zhang, Z. Liu, and . Kang, 3D Branched ZnO Nanowire Arrays Decorated with Plasmonic Au Nanoparticles for High-Performance Photoelectrochemical Water Splitting, ACS Applied Materials & Interfaces, vol.6, issue.6, pp.4480-4489, 2014.
DOI : 10.1021/am500234v

X. F. Huang, Q. Q. Duan, C. M. Wei, and . Lieber, Directed Assembly of One-Dimensional Nanostructures into Functional Networks, Science, vol.291, issue.5504, pp.630-633, 2001.
DOI : 10.1126/science.291.5504.630

V. Akimov, J. T. Muckerman, and O. V. Prezhdo, Nonadiabatic Dynamics of Positive Charge during Photocatalytic Water Splitting on GaN(10-10) Surface: Charge Localization Governs Splitting Efficiency, Journal of the American Chemical Society, vol.135, issue.23, pp.8682-8691, 2013.
DOI : 10.1021/ja4029395

-. Chen, G. Zhu, Y. Hu, J. Yu, J. Song et al., Gallium Nitride Nanowire Based Nanogenerators and Light-Emitting Diodes, ACS Nano, vol.6, issue.6, pp.5687-5692, 2012.
DOI : 10.1021/nn301814w

B. Wang, J. H. Song, F. Zhang, C. Y. He, Z. Hu et al., Electricity Generation based on One-Dimensional Group-III Nitride Nanomaterials, Advanced Materials, vol.79, issue.19, pp.2155-2158, 2010.
DOI : 10.1002/adma.200903442

H. Deb, Y. Kim, R. Qin, M. Lahiji, R. Oliver et al., GaN Nanorod Schottky and p???n Junction Diodes, Nano Letters, vol.6, issue.12, pp.2893-2898, 2006.
DOI : 10.1021/nl062152j

URL : http://docs.lib.purdue.edu/cgi/000153985.pdf

D. Koester, W. Sager, O. Quitsch, A. Pfingsten, S. Poloczek et al., High-Speed GaN/GaInN Nanowire Array Light-Emitting Diode on Silicon(111), Nano Letters, vol.15, issue.4, pp.2318-2323, 2015.
DOI : 10.1021/nl504447j

H. Chin, T. S. Ahn, H. Li, S. Vaddiraju, C. J. Bardeen et al., Photoluminescence of GaN Nanowires of Different Crystallographic Orientations, Nano Letters, vol.7, issue.3, pp.626-631, 2007.
DOI : 10.1021/nl062524o

P. J. Kuykendall, Y. F. Pauzauskie, J. Zhang, D. Goldberger, J. Sirbuly et al., Crystallographic alignment of high-density gallium nitride nanowire arrays, Nature Materials, vol.18, issue.8, pp.524-528, 2004.
DOI : 10.1103/PhysRevB.61.16623

Y. Sun, H. Cho, T. W. Kim, and . Kang, High efficiency and brightness of blue light emission from dislocation-free InGaN???GaN quantum well nanorod arrays, Applied Physics Letters, vol.87, issue.9, p.93115, 2005.
DOI : 10.1063/1.122249

D. Hersee, X. Sun, and X. Wang, The Controlled Growth of GaN Nanowires, Nano Letters, vol.6, issue.8, pp.1808-1811, 2006.
DOI : 10.1021/nl060553t

L. D. Zhang, X. F. Zhang, C. H. Wang, X. S. Liang, Y. W. Peng et al., Fabrication and photoluminescence of ordered GaN nanowire arrays, The Journal of Chemical Physics, vol.79, issue.13, pp.5714-5717, 2001.
DOI : 10.1103/PhysRevB.51.13326

V. M. Fernández-garrido, K. K. Kaganer, T. Sabelfeld, J. Gotschke, E. Grandal et al., Self-Regulated Radius of Spontaneously Formed GaN Nanowires in Molecular Beam Epitaxy, Nano Letters, vol.13, issue.7, pp.3274-3280, 2013.
DOI : 10.1021/nl401483e

M. Coulon, B. Alloing, V. Brandli, D. Lefebvre, S. Chenot et al., Selective area growth of Ga-polar GaN nanowire arrays by continuous-flow MOVPE: A systematic study on the effect of growth conditions on the array properties, physica status solidi (b), vol.13, issue.5, pp.1096-1103, 2015.
DOI : 10.1002/pssb.201451589

M. Li, Y. Lin, J. R. Creighton, J. J. Figiel, and G. T. Wang, -Plane Sapphire, Advanced Materials, vol.97, issue.23, pp.2416-2420, 2009.
DOI : 10.1002/adma.200802532

URL : https://hal.archives-ouvertes.fr/tel-00807841

T. Huang, J. Song, W. F. Lee, Y. Ding, Z. Gao et al., GaN Nanowire Arrays for High-Output Nanogenerators, Journal of the American Chemical Society, vol.132, issue.13, pp.4766-4771, 2010.
DOI : 10.1021/ja909863a

M. G. Wu, Y. J. Hahm, L. Jung, and . Menon, Epitaxially grown GaN nanowire networks, J. Mater. Chem., vol.50, issue.4, pp.463-467, 2009.
DOI : 10.1039/B816064C

D. Liu, F. Yuan, B. Dierre, T. Sekiguchi, S. Zhang et al., Origin of Yellow-Band Emission in Epitaxially Grown GaN Nanowire Arrays, ACS Applied Materials & Interfaces, vol.6, issue.16, pp.14159-14166, 2014.
DOI : 10.1021/am5034878

D. Liu, Y. Bando, M. S. Wang, and D. Golberg, Synthesis and <I>In-Situ</I> TEM Transport Measurements of Individual GaN Nanowires and Nanotubes, Journal of Nanoscience and Nanotechnology, vol.10, issue.6, pp.3945-3951, 2010.
DOI : 10.1166/jnn.2010.1993

D. Liu, Y. Bando, C. C. Tang, F. F. Xu, and D. Golberg, Quasi-aligned single-crystalline GaN nanowire arrays, Applied Physics Letters, vol.4, issue.7, p.73106, 2005.
DOI : 10.1021/ja0040518

S. Wagner and W. C. Ellis, VAPOR???LIQUID???SOLID MECHANISM OF SINGLE CRYSTAL GROWTH, Applied Physics Letters, vol.33, issue.5, pp.89-90, 1964.
DOI : 10.1063/1.1722675

R. E. Diaz, R. Sharma, K. Jarvis, Q. Zhang, and S. Mahajan, Direct observation of nucleation and early stages of growth of GaN nanowires, Journal of Crystal Growth, vol.341, issue.1, pp.1-6, 2012.
DOI : 10.1016/j.jcrysgro.2011.09.028

B. D. Yuan, Z. E. Liu, B. Wang, Y. Yang, B. Yin et al., Synthesis, Microstructure, and Cathodoluminescence of [0001]-Oriented GaN Nanorods Grown on Conductive Graphite Substrate, ACS Applied Materials & Interfaces, vol.5, issue.22, pp.12066-12072, 2013.
DOI : 10.1021/am403876e

K. Chae, J. Lee, D. Jang, J. Min, O. Kim et al., Self-assembled growth of inclined GaN nanorods on (10???10) m-plane sapphire using metal???organic chemical vapor deposition, Journal of Crystal Growth, vol.409, pp.65-70, 2015.
DOI : 10.1016/j.jcrysgro.2014.09.040

M. G. Zhao, Q. Kibria, H. P. Wang, Z. Nguyen, and . Mi, Growth of large-scale vertically aligned GaN nanowires and their heterostructures with high uniformity on SiOx by catalyst-free molecular beam epitaxy, Nanoscale, vol.5, issue.12, pp.5283-5287, 2013.
DOI : 10.1039/c3nr00387f

G. Z. Xie, Z. B. Wang, D. P. Shao, and . Li, Zn-Doped Gallium Nitride Nanotubes with Zigzag Morphology, The Journal of Physical Chemistry C, vol.113, issue.33, pp.14633-14637, 2009.
DOI : 10.1021/jp903079c

L. Román, J. Faro, and S. Velasco, A simple experiment for measuring the surface tension of soap solutions, American Journal of Physics, vol.69, issue.8, pp.920-921, 2001.
DOI : 10.1119/1.1365402

Y. Yang, Z. L. Ding, and . Wang, Deformation-Free Single-Crystal Nanohelixes of Polar Nanowires, Nano Letters, vol.4, issue.7, pp.1309-1312, 2004.
DOI : 10.1021/nl049317d

J. H. Liu and . Edgar, Substrates for gallium nitride epitaxy, Materials Science and Engineering: R: Reports, vol.37, issue.3, pp.61-127, 2002.
DOI : 10.1016/S0927-796X(02)00008-6

C. Y. Tham, J. E. Nam, and . Fischer, Defects in GaN Nanowires, Advanced Functional Materials, vol.41, issue.9, pp.1197-1202, 2006.
DOI : 10.1002/adfm.200500807

B. Yang, Y. Liu, H. Wang, Q. Zhuang, F. Liu et al., Zn-dopant dependent defect evolution in GaN nanowires, Nanoscale, vol.13, issue.39, pp.16237-16245, 2015.
DOI : 10.1039/C5NR04771D

D. Liu, B. Yang, B. Dierre, T. Sekiguchi, and X. Jiang, Local defect-induced red-shift of cathodoluminescence in individual ZnS nanobelts, Nanoscale, vol.13, issue.21, pp.12414-12420, 2014.
DOI : 10.1039/C4NR04464A

M. Meng, A. Estruga, S. A. Forticaux, Q. Morin, Z. Wu et al., Formation of Stacking Faults and the Screw Dislocation-Driven Growth: A Case Study of Aluminum Nitride Nanowires, ACS Nano, vol.7, issue.12, pp.11369-11378, 2013.
DOI : 10.1021/nn4052293

. Akasaki, Blue Light: A Fascinating Journey (Nobel Lecture), Angewandte Chemie International Edition, vol.5, issue.49, pp.7750-7763, 2015.
DOI : 10.1002/anie.201502664

. Amano, Growth of GaN Layers on Sapphire by Low-Temperature-Deposited Buffer Layers and Realization of p-type GaN by Magesium Doping and Electron Beam Irradiation (Nobel Lecture), Angewandte Chemie International Edition, vol.36, issue.41, pp.7764-7769, 2015.
DOI : 10.1002/anie.201501651

. Nakamura, Background Story of the Invention of Efficient InGaN Blue-Light-Emitting Diodes (Nobel Lecture), Angewandte Chemie International Edition, vol.103, issue.27, pp.7770-7788, 2015.
DOI : 10.1002/anie.201500591

L. Liu, C. Hu, L. Tang, S. Liu, J. Li et al., Self-organized formation and optical study of GaN micropyramids, Materials Science and Engineering: B, vol.176, issue.10, pp.805-809, 2011.
DOI : 10.1016/j.mseb.2011.04.002

W. S. Chen, T. Y. Shiao, W. M. Tang, C. H. Chang, C. H. Liao et al., Threading dislocation evolution in patterned GaN nanocolumn growth and coalescence overgrowth, Journal of Applied Physics, vol.106, issue.2, p.23521, 2009.
DOI : 10.1016/j.tsf.2006.02.037

URL : http://ntur.lib.ntu.edu.tw/news/agent_contract.pdf

P. Suski, H. Perlin, M. Teisseyre, I. Leszczy?ski, J. Grzegory et al., Mechanism of yellow luminescence in GaN, Applied Physics Letters, vol.50, issue.15, pp.2188-2190, 1995.
DOI : 10.1063/1.115098

Y. Xu, J. Hao, T. Zhang, L. Jiang, X. Yang et al., -Plane Sapphire by Metal Organic Chemical Vapor Deposition, Nano Letters, vol.13, issue.8, pp.3654-3657, 2013.
DOI : 10.1021/nl4015205

URL : https://hal.archives-ouvertes.fr/cea-01058940

I. Amano, K. Akasaki, N. Hiramatsu, N. Koide, and . Sawaki, Effects of the buffer layer in metalorganic vapour phase epitaxy of GaN on sapphire substrate, Thin Solid Films, vol.163, pp.415-420, 1988.
DOI : 10.1016/0040-6090(88)90458-0

L. Zhang, X. Li, Y. Shao, J. Yu, Y. Wu et al., Improving the Quality of GaN Crystals by Using Graphene or Hexagonal Boron Nitride Nanosheets Substrate, ACS Applied Materials & Interfaces, vol.7, issue.8, pp.4504-4510, 2015.
DOI : 10.1021/am5087775