Seedless Growth of Free-Standing Copper Nanowires by Chemical Vapor Deposition

Choi, Hyungsoo; Park, Sungho

doi:10.1021/ja049217+

Cited by 148 publications

(86 citation statements)

References 21 publications

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“…In recent years, copper (Cu) NP have attracted much attention of researchers because of its application in wound dressings and biocidal properties [3,4] potential industrial use such as gas sensors, catalytic process, high-temperature superconductors, and solar cells [5][6][7]. In literature, the CuNPs are synthesized from vapor deposition [8], electrochemical reduction [9], radiolysis reduction [10], thermal decomposition [11], chemical reduction of Cu metal salt [12], and room temperature synthesis using starch and hydrazine hydrate [13]. In recent, green synthesis of CuNPs was achieved using microorganisms [14], plant extract [15].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Copper Nanoparticle From Passiflora Foetida Leaf Extract and Its Antibacterial Activity

Renganathan

Fatma²,

Kalainila³

et al. 2017

Asian J Pharm Clin Res

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Objective: Development of green nanotechnology is generating interest of researchers toward eco-friendly biosynthesis of nanoparticles (NPs). In this study, biosynthesis of stable copper (Cu) NPs was done using Passiflora foetida leaf extract. Materials and Methods:First, we prepared leaf extract of Passiflora foetida in deionized water. This extract added to 20 mMol of Cupric sulfate solution, and we observed the change in color of the solution from colorless to colored solution; this indicates that there is a formation of CuNPs.Results: These biosynthesized CuNPs were characterized with the help of ultraviolet visible spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The spectroscopic analysis of synthesized CuNPs showed the maximum absorbance at 350 nm indicating the presence of biosynthesized CuNPs in the reaction mixture. Conclusion:It was observed that the P. foetida leaf extract can reduce Cu ions into CuNPs within 8-10 minutes of reaction time. Thus, this method can be used for rapid and eco-friendly biosynthesis of stable CuNPs.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of Copper Nanoparticle From Passiflora Foetida Leaf Extract and Its Antibacterial Activity

Renganathan

Fatma²,

Kalainila³

et al. 2017

Asian J Pharm Clin Res

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“…In fact, welldefined five-twinned fcc nanostructures vertically grown on a substrate surface have not been possible except in a few cases involving copper nanowires (CuNWs) and copper nanobats. [7,21] In this Communication, we present a detailed structural analysis, based on a transmission electron microscopy (TEM) and electron diffraction (ED) study, of CuNWs grown by chemical vapor deposition (CVD) that not only have fivefold-twinned structures but are also suitable for integration into devices. The analysis unveils new details of the five-twinned structure and elucidates the growth mechanism of the CuNWs, specific to the special precursor used, which does not require templates or catalysts.…”

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confidence: 99%

Copper Nanowires with a Five‐Twinned Structure Grown by Chemical Vapor Deposition

Kim

Briceno

et al. 2008

Advanced Materials

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Nanostructures, especially nanowires with high aspect ratios, have attracted much attention due to their potential applications, such as interconnects in nanofabrication, [1] optoelectronics, [2] nanosensors, [3] nano-biotechnology, [4] and electron emitters. [5][6][7] It was reported that the properties of the nanostructures were affected by their size and morphology, [8][9][10] which subsequently prompted extensive efforts to control them. The synthesis of metal nanostructures, such as nanorods and nanowires of copper, silver, and gold, has been demonstrated using various methods. [7,[11][12][13][14][15][16][17][18][19][20] For these metals, face-centered cubic (fcc) structures were synthesized, particularly with fivefold twinned symmetry, which was done mostly in the solution phase. The randomness inherent to this solution-phase synthesis, however, has largely prevented the resulting nanostructures from being integrated into highdensity electronic and optoelectronic devices. In fact, welldefined five-twinned fcc nanostructures vertically grown on a substrate surface have not been possible except in a few cases involving copper nanowires (CuNWs) and copper nanobats. [7,21] In this Communication, we present a detailed structural analysis, based on a transmission electron microscopy (TEM) and electron diffraction (ED) study, of CuNWs grown by chemical vapor deposition (CVD) that not only have fivefold-twinned structures but are also suitable for integration into devices. The analysis unveils new details of the five-twinned structure and elucidates the growth mechanism of the CuNWs, specific to the special precursor used, which does not require templates or catalysts. The electron emission characteristics of the CuNWs were investigated and they indicate that the CuNWs are a promising electron emitter. An array of CuNWs was grown on a patterned silicon substrate to show that the present CuNW growth mechanism is suitable for practical application. The array was used in a proofof-principle experiment to demonstrate a field emission display. The CuNWs were prepared by a method previously described that uses Cu(etac)[P(OEt) 3 ] 2 as a precursor, where etac is ethyl 3-oxobutanoate and P(OEt) 3 is triethyl phosphite.[21] Typically, the CuNWs of 70-250 nm diameter were grown on Si at substrate temperatures of 200-300 8C under 0.1-1.0 Torr using argon as a carrier gas. The nanowires were also grown on other substrates, including glass, metal, metal oxide, and polymer. The diameters and lengths of the CuNWs were controlled by the processing conditions, such as the substrate material, substrate temperature, deposition time, and precursor feeding rate. Figures 1a-c show scanning electron microscopy (SEM) images of CuNWs grown vertically on a Si substrate at 250 8C, indicating that the nanowires have five side planes forming a pentagonal pyramid tip. Figure 1d shows the copper seed formation at an early stage of nanowire growth. The structure of the CuNWs was analyzed using TEM. Figure 2 shows TEM images of a CuNW and correspo...

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“…Their superior electrical, optical and thermal properties render them useful to a wide variety of applications, such as in nanoelectronic devices, transparent conducting electrodes, chemical and biosensors, and light polarizers [1][2][3]. Cu nanowires are being synthesized in a number of fabrication methods, such as hydrothermal method [1], electrodeposition [3], chemical vapor deposition [4] and electroless deposition [5][6][7][8][9][10]. Among the aforementioned methods, electroless deposition has been considered the most promising because it is (1) fast, simple and does not demand extreme conditions, (2) potentially scalable, and (3) cost-effective [5].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Investigation on the Formation of Cu Nanowires by Electroless Deposition

Felizco

Balela

2015

MATEC Web of Conferences

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Abstract. The growth of copper (Cu) nanowires by electroless deposition in aqueous solution at 60-80 °C was studied from an electrochemical perspective using in situ mixed potential measurements and potential-pH diagrams. Scanning Electron Microscopy (SEM) showed that thick and short nanowires were obtained at high temperatures, while long and thin nanowires result from low reaction temperatures. In situ mixed potential measurements reveal that Cu(II) reduction is more favored at higher reaction temperatures, hastening the reduction reaction. The fast reaction leads to a high concentration of Cu atoms in the solution. As a result, Cu deposition occurs rapidly, such that they attached on both sides and ends of the primary Cu nanowires. This results to the formation of thick and short structures. On the other hand, thin and long nanowires are obtained due to the slow reduction reaction, which gives the Cu atoms more time to orderly attach in a wire-like formation.

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Seedless Growth of Free-Standing Copper Nanowires by Chemical Vapor Deposition

Cited by 148 publications

References 21 publications

Green Synthesis of Copper Nanoparticle From Passiflora Foetida Leaf Extract and Its Antibacterial Activity

Green Synthesis of Copper Nanoparticle From Passiflora Foetida Leaf Extract and Its Antibacterial Activity

Copper Nanowires with a Five‐Twinned Structure Grown by Chemical Vapor Deposition

Electrochemical Investigation on the Formation of Cu Nanowires by Electroless Deposition

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