Process Engineering and other metal-semiconductor composite core-shell nanostructures

Progress in research of metal-silicon composite core-shell nanostructures such as process engineering

Synthetic mechanism diagram and transmission electron microscopy characterization of various core-shell structural composite products

The "plasma synergy" of metal-semiconductor composites has made it widely used in photocatalysis, optoelectronic devices, and lasers. Therefore, how to precisely control the synthesis of metal-semiconductor composite nanostructures has become a research hotspot.

In a two-component composite system, the core-shell nanostructure is the simplest and most effective structure. However, due to the large interface between the metal and the semiconductor, the semiconductor tends to nucleate from the core rather than the metal nanoparticle, resulting in the semiconductor cannot be uniformly wrapped on the surface of the metal nanoparticle. Accurate and controllable synthesis of metal-semiconductor composite core-shell nanostructures still faces significant challenges.

Recently, the team of the researcher Wang Dan of the Institute of Process Engineering of the Chinese Academy of Sciences teamed up with the team of associate professor Chen Hongyu of Nanyang Technological University in Singapore to use polyvinylpyrrolidone as a surfactant and through regulation: (1) nucleation and growth of shell materials; (2) The attachment process of the shell on the seeds; (3) The dispersion and aggregation process of nano seeds, and developed a method of encapsulating zinc oxide semiconductors on different seeds (including metals, oxides, polymer nanoparticles, graphene oxide, and carbon nanometers). The universal method of the surface). Moreover, this method is not limited to using zinc oxide as the outer shell, but also suitable for the outer shell of other oxides or sulfides, such as Fe3O4, MnO, Co2O3, TiO2, Eu2O3, Tb2O3, Gd2O3, beta-Ni(OH)2 , ZnS, and CdS, etc., to synthesize composite core-shell nanostructures. The results laid the foundation for the synthesis of other composite core-shell nanostructures. The results of relevant studies were published in the International Journal of the American Chemical Society (2013, 135, 9099−9110).

These related studies were funded by the Singapore Science and Technology Agency (SERC 112-120-2011) and the National Research Foundation of Singapore (CRP-4-2008-06).

Single Flute End Mills

Tungsten Carbide End Mills-Single Flute End Mills

Material:Carbide

Type:End Mill
Coating:DLC
Product Name:Single Flutes End Mills High Speed Cutting
Suitable for:Carbon Steel
Application:CNC Process
Usage:General High Speed Cutting
Controlling Mode:CNC Tooling System

Flute:Single

Model Number:End mill
Material:Carbide, Tungsten Cobalt Alloy
Coating:AlTiN, TiAIN, TiCN, Tin
Product Name:Tungsten Carbide Solid End Mill Cutters
Main Using Purpose:Carbide Body for Drill Bits/ Endmills / Reamers
Service:OEM/ODM
Type:End mill
Cobalt Percentage:From 3% to 30% Based on Different Grades
Grain Sizes Selection:Ultra Fine, Fine, Medium, Coarse
Grades:K10/K20/K30/K40/Yl10.2/Yg6/Yg6X/Yg8/Yg10X/Yl10.2
Surface Finishing:Polished and Unpolished

Specification
It can be divided into 3 categories, normal end mill, ball end cutter, ball nose end mill cutters.
Cutting D (mm)
Shank D(mm)
Overal length (mm)
Flute
Flute
Flute
Angle
Angle
Angle
1.0
1.0
50
2
3
4
55°
60°
65°
1.5
1.5
50
2
3
4
55°
60°
65°
2.0
2.0
50
2
3
4
55°
60°
65°
2.5
2.5
50
2
3
4
55°
60°
65°
3.0
3.0
50
2
3
4
55°
60°
65°
3.5
3.5
50
2
3
4
55°
60°
65°
4
4
50
2
3
4
55°
60°
65°
5
5
50
2
3
4
55°
60°
65°
6
6
50
2
3
4
55°
60°
65°
8
8
60
2
3
4
55°
60°
65°
10
10
75
2
3
4
55°
60°
65°
12
12
75
2
3
4
55°
60°
65°
14
14
100
2
3
4
55°
60°
65°
16
16
100
2
3
4
55°
60°
65°
18
18
100
2
3
4
55°
60°
65°
20
20
100
2
3
4
55°
60°
65°

Single Flute End Mills,Single Flute Milling Cutter,Cut End Mills Single Flute,Cutter Tools For Aluminum

Changzhou Bomitools Co.,Ltd. , https://www.bomitools.com