Shiqi Xiao

4 Questions 11 Answers 0 Followers

Questions related from Shiqi Xiao

Why do Cu -Ni alloy foil crimp when heated?

The Cu foil was first electroplated with a layer of Ni, then the alloy foil was annealed in quartz tube under H2/Ar atmosphere at 1040℃ for 2 hours. But when I open the furnace and cool the tube...

01 April 2016 895 5 View

How do I flatten the surface of Cu used in graphene CVD growth?

I want to use AFM to compare the surface roughness of Cu under different pretreatment process. But the Cu surface is waviness, whcich domainates the AFM results. Does anyone know how to obtain the...

22 September 2015 2,368 7 View

Does anyone know the relation between pressure and boundary layer thickness?

I refered two books, but they gave me the different answers. One said the lower the pressure, the thicker the boundary layer. The other said the oppsite result.

31 August 2015 7,495 2 View

Where do the sphere impurities on copper after the growth of graphene come from?

As shown in the attached picture, I found a lot of sphere impurities(100nm) on the surface of the sample. EDS tells the impurities contain Si and O element. Does anyone know how this happens? The...

17 June 2015 5,803 8 View