Surface coating of microparticles with tungsten carbide by using the barrel sputtering system

Akamaru, Satoshi; Yamamoto, Hironari; Abe, Takayuki

doi:10.1016/j.vacuum.2008.04.052

Cited by 15 publications

(8 citation statements)

References 11 publications

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“…The details of the polygonal barrel-sputtering method used in this study have been reported in the papers previously [24][25][26][27][28][29][30]. A plate of Pt (99.99% purity, 50 × 100 mm) or Ru (99.99% purity, 50 × 100 mm) was used as a target.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

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CO oxidation on non-alloyed Pt and Ru electrocatalysts prepared by the polygonal barrel-sputtering method

Inoue¹,

Nishimura²,

Akamaru³

et al. 2009

Electrochimica Acta

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Section: Preparation Of Samplesmentioning

confidence: 99%

“…The present authors have developed a new surface-modifying dry process named as the "polygonal barrel-sputtering method" [24][25][26][27][28][29][30]. Recently, we reported the preparation of electrocatalysts for PEFCs using this method [29,30].…”

Section: Introductionmentioning

confidence: 99%

CO oxidation on non-alloyed Pt and Ru electrocatalysts prepared by the polygonal barrel-sputtering method

Inoue¹,

Nishimura²,

Akamaru³

et al. 2009

Electrochimica Acta

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“…The AC power for sputtering was supplied by RF power generation (13.56 MHz). Samples were prepared following reported procedures [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. NaCl powder (particle size: 250 -500 μm, Kanto Chemical or The Salt Industry Center of Japan) was introduced into a hexagonal barrel and then the barrel was placed in a vacuum chamber.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

“…Based on this background, we developed a novel surface modification method for powders using the sputtering technique, which we call the "polygonal barrel-sputtering method" [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The polygonal barrel-sputtering method has been successfully used for uniform surface modification of particles composed of metals [17], alloys [18], metal oxides [19][20][21][22][23][24], polymers [25][26][27], and carbon [28][29][30][31][32]. In this study, the surfaces of NaCl particles were modified with metal films using the polygonal barrel-sputtering method to demonstrate the application of our method to the surface modification of water-soluble and water-reactive powders.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of NaCl Particles with Metal Films Using the Polygonal Barrel-Sputtering Method

Akamaru¹,

Inoue²,

Abe

2013

MSA

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In this study, the surfaces of NaCl particles were modified with metal films using the polygonal barrel-sputtering method. When Pt was sputtered on NaCl particles, the individual particles changed from white to metallic. Characterization of the treated samples indicated that thin Pt metal films were uniformly deposited on the NaCl particles. Immersion of the treated NaCl particles in water revealed that they floated to the surface of the water with the increase in the immersion time, although their original cubic shapes remained unchanged. The floating phenomenon of the Pt-coated NaCl particles, as mentioned above, suggests that NaCl was dissolved by the permeation of water through invisible defects such as grain boundaries in the Pt films, leading to the formation of hollow particle-like materials. It should be noted that uniform film deposition on the NaCl particles could also be achieved by sputtering with Au or Cu. Based on the obtained results, our sputtering method allows uniform surface modification of water-soluble and water-reactive powders that cannot be treated by conventional wet process using water.

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“…Surface coating (or surface modification) has been recognized as one of the most advanced and intriguing methods to build tailored nanomaterials [13,14]. There are many deposition approaches that are widely used for the surface coating of a nanoscale object, such as sol-gel coating, self-assembly, and sonochemical processing [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Sonochemical synthesis and characterization of ZnO nanorod/Ag nanoparticle composites

Li¹,

Liu²,

Qin³

et al. 2009

Cryst. Res. Technol.

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A simple sonochemical route for the synthesis of Ag nanoparticles on ZnO nanorods is reported. Ultrasonic irradiation of a mixture of ZnO nanorods, Ag(NH 3 ) 2 + , and formaldehyde in an aqueous medium yields ZnO nanorod/Ag nanoparticle composites. The powder X-ray diffraction of the ZnO/Ag composites shows additional diffraction peaks corresponding to the face-center-cubic structured Ag crystalline, apart from the signals from the ZnO nanorods. Scanning electron microscopy and transmission electron microscopy images of the ZnO/Ag composites reveal that the ZnO nanorods are coated with Ag nanoparticles with a mean size of several tens nanometer. The absorption band of ZnO/Ag composites is distinctly broadened and red-shifted, indicating the strong interfacial interaction between ZnO nanorods and Ag nanoparticles. This sonochemical method is simple, mild and readily scaled up, affording a simple way for synthesis of other composites.

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Surface coating of microparticles with tungsten carbide by using the barrel sputtering system

Cited by 15 publications

References 11 publications

CO oxidation on non-alloyed Pt and Ru electrocatalysts prepared by the polygonal barrel-sputtering method

CO oxidation on non-alloyed Pt and Ru electrocatalysts prepared by the polygonal barrel-sputtering method

Surface Modification of NaCl Particles with Metal Films Using the Polygonal Barrel-Sputtering Method

Sonochemical synthesis and characterization of ZnO nanorod/Ag nanoparticle composites

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