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Controlled Fabrication of Quality ZnO NWs/CNTs and ZnO NWs/Gr Heterostructures via Direct Two-Step CVD Method

Journal Article · · Nanomaterials
DOI:https://doi.org/10.3390/nano11071836· OSTI ID:1815620
 [1];  [2];  [3];  [4];  [3];  [3];  [5];  [5];  [5];  [3]
  1. Saint Louis University, St. Louis, MO (United States). Dept. of Physics; OSTI
  2. Saint Louis University, St. Louis, MO (United States). Dept. of Physics; Univ. of Misan, Maysan (Iraq). College of Science. Dept. of Physics
  3. Saint Louis University, St. Louis, MO (United States). Dept. of Physics
  4. Saint Louis University, St. Louis, MO (United States). Dept. of Physics; Saint Louis University, St. Louis, MO (United States). Parks College of Engineering, Aviation and Technology
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
A novel and advanced approach of growing zinc oxide nanowires (ZnO NWs) directly on single-walled carbon nanotubes (SWCNTs) and graphene (Gr) surfaces has been demonstrated through the successful formation of 1D–1D and 1D–2D heterostructure interfaces. The direct two-step chemical vapor deposition (CVD) method was utilized to ensure high-quality materials’ synthesis and scalable production of different architectures. Iron-based universal compound molecular ink was used as a catalyst in both processes (a) to form a monolayer of horizontally defined networks of SWCNTs interfaced with vertically oriented ZnO NWs and (b) to grow densely packed ZnO NWs directly on a graphene surface. We show here that our universal compound molecular ink is efficient and selective in the direct synthesis of ZnO NWs/CNTs and ZnO NWs/Gr heterostructures. Heterostructures were also selectively patterned through different fabrication techniques and grown in predefined locations, demonstrating an ability to control materials’ placement and morphology. Several characterization tools were employed to interrogate the prepared heterostructures. ZnO NWs were shown to grow uniformly over the network of SWCNTs, and much denser packed vertically oriented ZnO NWs were produced on graphene thin films. Such heterostructures can be used widely in many potential applications, such as photocatalysts, supercapacitors, solar cells, piezoelectric or thermal actuators, as well as chemical or biological sensors.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1815620
Alternate ID(s):
OSTI ID: 1864308
Journal Information:
Nanomaterials, Journal Name: Nanomaterials Journal Issue: 7 Vol. 11; ISSN 2079-4991; ISSN NANOKO
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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