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Title: Electrodeposition of InSb branched nanowires: Controlled growth with structurally tailored properties

In this article, electrodeposition method is used to demonstrate growth of InSb nanowire (NW) arrays with hierarchical branched structures and complex morphology at room temperature using an all-solution, catalyst-free technique. A gold coated, porous anodic alumina membrane provided the template for the branched NWs. The NWs have a hierarchical branched structure, with three nominal regions: a “trunk” (average diameter of 150 nm), large branches (average diameter of 100 nm), and small branches (average diameter of sub-10 nm to sub-20 nm). The structural properties of the branched NWs were studied using scanning transmission electron microscopy, transmission electron microscopy, scanning electron microscopy, x-ray diffraction, energy dispersive x-ray spectroscopy, and Raman spectroscopy. In the as-grown state, the small branches of InSb NWs were crystalline, but the trunk regions were mostly nanocrystalline with an amorphous boundary. Post-annealing of NWs at 420 °C in argon produced single crystalline structures along 〈311〉 directions for the branches and along 〈111〉 for the trunks. Based on the high crystallinity and tailored structure in this branched NW array, the effective refractive index allows us to achieve excellent antireflection properties signifying its technological usefulness for photon management and energy harvesting.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [2] ; ;  [1] ;  [4] ;  [5] ; ;  [6] ;  [7] ;  [1] ;  [2] ;  [2] ;  [1] ;  [2] ;  [2]
  1. School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)
  2. (United States)
  3. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)
  4. Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta–cho, Midori-ku, Yokohama 226-8502 (Japan)
  5. (Japan)
  6. Advanced Device Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
  7. (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
Publication Date:
OSTI Identifier:
22314327
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; ANNEALING; ARGON; ELECTRODEPOSITION; GOLD; INDIUM ANTIMONIDES; MEMBRANES; MONOCRYSTALS; QUANTUM WIRES; RAMAN SPECTROSCOPY; REFRACTIVE INDEX; SCANNING ELECTRON MICROSCOPY; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY