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The surface condition effect of Cu2O flower/grass-like nanoarchitectures grown on Cu foil and Cu film.

Hu L, Ju Y, Hosoi A, Tang Y - Nanoscale Res Lett (2013)

Bottom Line: The FGLNAs are approximately 3.5 to 12 μm in size, and their petals are approximately 50 to 950 nm in width.The high compressive stress caused by a large oxide volume in the Cu2O layer on the specimen surface played an important role in the growth of FGLNAs.PACS: 81.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. ju@mech.Nagoya-u.ac.jp.

ABSTRACT
Cu2O flower/grass-like nanoarchitectures (FGLNAs) were fabricated directly on two category specimens of Cu foils and Cu film using thermal oxidation method. The FGLNAs are approximately 3.5 to 12 μm in size, and their petals are approximately 50 to 950 nm in width. The high compressive stress caused by a large oxide volume in the Cu2O layer on the specimen surface played an important role in the growth of FGLNAs. The effects of surface conditions, such as the surface stresses, grain size, and surface roughness of Cu foil and Cu film specimens, on the FGLNA growth were discussed in detail. PACS: 81. Materials science; 81.07.-b Nanoscale materials and structures: fabrication and characterization; 81.16.Hc Catalytic methods.

No MeSH data available.


Related in: MedlinePlus

XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating.
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Figure 9: XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating.

Mentions: Figure 9 shows the XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating, and the peak width at half height was calculated using the JADE software (version 6.5). Mean grain size determined from the width of the diffraction peaks using Scherrer’s formula is 42 nm for the specimen of polished Cu foil and 59 nm for the Cu film specimen. It is considered that larger grain size may induce larger initial compressive stress in the specimen, thereby creating larger vertical gradient stress to promote the growth of FGLNAs. It should be noted that polishing would not change the crystal size of the Cu foil specimen. Therefore, the crystal size of the polished Cu foil specimen is the same as that of the unpolished Cu foil specimen.


The surface condition effect of Cu2O flower/grass-like nanoarchitectures grown on Cu foil and Cu film.

Hu L, Ju Y, Hosoi A, Tang Y - Nanoscale Res Lett (2013)

XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4231356&req=5

Figure 9: XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating.
Mentions: Figure 9 shows the XRD spectra of polished Cu foil (400 grit) and Cu film specimens before heating, and the peak width at half height was calculated using the JADE software (version 6.5). Mean grain size determined from the width of the diffraction peaks using Scherrer’s formula is 42 nm for the specimen of polished Cu foil and 59 nm for the Cu film specimen. It is considered that larger grain size may induce larger initial compressive stress in the specimen, thereby creating larger vertical gradient stress to promote the growth of FGLNAs. It should be noted that polishing would not change the crystal size of the Cu foil specimen. Therefore, the crystal size of the polished Cu foil specimen is the same as that of the unpolished Cu foil specimen.

Bottom Line: The FGLNAs are approximately 3.5 to 12 μm in size, and their petals are approximately 50 to 950 nm in width.The high compressive stress caused by a large oxide volume in the Cu2O layer on the specimen surface played an important role in the growth of FGLNAs.PACS: 81.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. ju@mech.Nagoya-u.ac.jp.

ABSTRACT
Cu2O flower/grass-like nanoarchitectures (FGLNAs) were fabricated directly on two category specimens of Cu foils and Cu film using thermal oxidation method. The FGLNAs are approximately 3.5 to 12 μm in size, and their petals are approximately 50 to 950 nm in width. The high compressive stress caused by a large oxide volume in the Cu2O layer on the specimen surface played an important role in the growth of FGLNAs. The effects of surface conditions, such as the surface stresses, grain size, and surface roughness of Cu foil and Cu film specimens, on the FGLNA growth were discussed in detail. PACS: 81. Materials science; 81.07.-b Nanoscale materials and structures: fabrication and characterization; 81.16.Hc Catalytic methods.

No MeSH data available.


Related in: MedlinePlus