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Synthesis of copper micro-rods with layered nano-structure by thermal decomposition of the coordination complex Cu(BTA)2.

Qu B, Lu X, Wu Y, You X, Xu X - Nanoscale Res Lett (2015)

Bottom Line: Porous metallic copper was successfully prepared by a simple thermal decomposition strategy.The copper micro-rods are assembled from unique thin lamellar layers, each with the thickness of approximately 200 nm and nano-pores of approximately 20 to 100 nm.The mechanism of the morphology formation is proposed, which would be able to offer a guideline toward porous metals with controllable macro/micro/nano-structures by the precursor crystal growth and design.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093 People's Republic of China.

ABSTRACT
Porous metallic copper was successfully prepared by a simple thermal decomposition strategy. A coordination compound of Cu(BTA)2 with the morphology of micro-rod crystal was synthesized as the precursor. The precursor to copper transformation was performed and annealed at 600°C with the shape preserved. The copper micro-rods are assembled from unique thin lamellar layers, each with the thickness of approximately 200 nm and nano-pores of approximately 20 to 100 nm. This morphology is highly related to the crystal structure of the precursor. The mechanism of the morphology formation is proposed, which would be able to offer a guideline toward porous metals with controllable macro/micro/nano-structures by the precursor crystal growth and design.

No MeSH data available.


Related in: MedlinePlus

I-Vmeasurement of a copper micro-rod along the longitudinal direction.
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Fig5: I-Vmeasurement of a copper micro-rod along the longitudinal direction.

Mentions: The electrical conductivity of one Cu micro-rod was measured at room temperature (Figure 5). The electric conductivity is approximately 105 S∙m−1 in the longitudinal direction. It is higher than amorphous carbon (approximately 2 × 104 to 3 × 104 S∙m−1) and lower than pure copper (5.96 × 107 S∙m−1) [29], which is consistent with the theory of the electrical conductivity of composites [30]. In comparison, the copper micro-rod sample was further pressed into a rectangular block with the size of 0.888 × 4 × 12 mm under 8 Mpa for 5 min. The electrical conductivity was found to be 7.4 × 106 S·m−1, which is one order of magnitude higher than that of the Cu micro-rod. It indicates that the electrical property depends not only on the component fractions, size, and shape but also on the porous structure: when intensively pressed, the pores are eliminated, leading to the enhancement of the electrical conductivity [30]. The micro/nano-porous structure and good conductivity suggest that the material may have application potentials in batteries/cells [31-33], sensing devices [34], and catalysis [35].Figure 5


Synthesis of copper micro-rods with layered nano-structure by thermal decomposition of the coordination complex Cu(BTA)2.

Qu B, Lu X, Wu Y, You X, Xu X - Nanoscale Res Lett (2015)

I-Vmeasurement of a copper micro-rod along the longitudinal direction.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384981&req=5

Fig5: I-Vmeasurement of a copper micro-rod along the longitudinal direction.
Mentions: The electrical conductivity of one Cu micro-rod was measured at room temperature (Figure 5). The electric conductivity is approximately 105 S∙m−1 in the longitudinal direction. It is higher than amorphous carbon (approximately 2 × 104 to 3 × 104 S∙m−1) and lower than pure copper (5.96 × 107 S∙m−1) [29], which is consistent with the theory of the electrical conductivity of composites [30]. In comparison, the copper micro-rod sample was further pressed into a rectangular block with the size of 0.888 × 4 × 12 mm under 8 Mpa for 5 min. The electrical conductivity was found to be 7.4 × 106 S·m−1, which is one order of magnitude higher than that of the Cu micro-rod. It indicates that the electrical property depends not only on the component fractions, size, and shape but also on the porous structure: when intensively pressed, the pores are eliminated, leading to the enhancement of the electrical conductivity [30]. The micro/nano-porous structure and good conductivity suggest that the material may have application potentials in batteries/cells [31-33], sensing devices [34], and catalysis [35].Figure 5

Bottom Line: Porous metallic copper was successfully prepared by a simple thermal decomposition strategy.The copper micro-rods are assembled from unique thin lamellar layers, each with the thickness of approximately 200 nm and nano-pores of approximately 20 to 100 nm.The mechanism of the morphology formation is proposed, which would be able to offer a guideline toward porous metals with controllable macro/micro/nano-structures by the precursor crystal growth and design.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093 People's Republic of China.

ABSTRACT
Porous metallic copper was successfully prepared by a simple thermal decomposition strategy. A coordination compound of Cu(BTA)2 with the morphology of micro-rod crystal was synthesized as the precursor. The precursor to copper transformation was performed and annealed at 600°C with the shape preserved. The copper micro-rods are assembled from unique thin lamellar layers, each with the thickness of approximately 200 nm and nano-pores of approximately 20 to 100 nm. This morphology is highly related to the crystal structure of the precursor. The mechanism of the morphology formation is proposed, which would be able to offer a guideline toward porous metals with controllable macro/micro/nano-structures by the precursor crystal growth and design.

No MeSH data available.


Related in: MedlinePlus