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Title: Synthesis, characterization, and growth mechanism of motifs of ultrathin cobalt-substituted NaFeSi 2O6 nanowires

Journal Article · · CrystEngComm
DOI:https://doi.org/10.1039/C7CE01885A· OSTI ID:1424996
 [1];  [1]; ORCiD logo [2];  [1];  [1];  [3];  [3]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Stony Brook Univ., NY (United States). Dept. of Chemistry
  2. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Sciences Division
  4. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Sciences Division

In this report, we have synthesized and structurally characterized nanowire bundles of cobalt-substituted pyroxenes, similar to the crystal structure of aegirine (i.e. Co-substituted XYSi2O6 with X and Y referring to metallic elements such as but not limited to Co, Na, and Fe), using a readily scalable hydrothermal technique. We then propose a growth mechanism for these bundles, based on detailed time and temperature dependent studies as well as complementary control experiments, particularly reactions in the absence of either 3-aminopropyltriethoxysilane (APTES) or sodium hydroxide (NaOH), via a transmission electron microscopy visualization study. Moreover, these nanowire bundles were probed for their magnetic properties and chemical composition using superconducting quantum interference device (SQUID) measurements, X-ray diffraction, and pair distribution function analysis, respectively. Specifically, SQUID measurement observations highlighted that these bundles evince (i) unique and interesting super-paramagnetic properties at 5 K that are consistent with that of our previously published ~2 nm ultra-small nanoparticles as well as (ii) paramagnetic behavior at 300 K.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0012704; SC00112704
OSTI ID:
1424996
Report Number(s):
BNL-114834-2017-JAAM; CRECF4
Journal Information:
CrystEngComm, Vol. 20, Issue 2; ISSN 1466-8033
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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