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Hydrothermal growth of ZnO nanowire arrays: fine tuning by precursor supersaturation

Journal Article · · CrystEngComm
DOI:https://doi.org/10.1039/C6CE02368A· OSTI ID:1361271
 [1];  [2];  [3];  [2];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials; Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
In this paper, we develop a technique that fine tunes the hydrothermal growth of ZnO nanowires to address the difficulties in controlling their growth in a conventional one-pot hydrothermal method. In our technique, precursors are separately and slowly supplied with the assistance of a syringe pump, through the entire course of the growth. Compared to the one-pot method, the significantly lowered supersaturation of precursors helps eliminating competitive homogeneous nucleation and improves the reproducibility. The supersaturation degree can be readily tuned by the precursor quantity and injection rate, thus forming ZnO nanowire arrays of various geometries and packing densities in a highly controllable fashion. The precise control of ZnO nanowire growth enables systematic studies on the correlation between the material's properties and its morphology. Finally, in this work, ZnO nanowire arrays of various morphologies are studied as photoelectrochemical (PEC) water splitting photoanodes, in which we establish clear correlations between the water splitting performance and the nanowires' size, shape, and packing density.
Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
1361271
Report Number(s):
BNL--113926-2017-JA; KC0403020
Journal Information:
CrystEngComm, Journal Name: CrystEngComm Journal Issue: 3 Vol. 19; ISSN 1466-8033
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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