Particle Sizing Small Angle Xray Scattering

1
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• Experimental Conditions
• Sample 0.5 wt, 1 wt, 2.5 wt and 5 wt
• Ludox HS-40 (Dupont Product,
  Aldrich Chemical Co.,)
• Preparation Dilute with deionized water
• Sonicate for 5 mins
  before loading into the sample holder
• Sample Holder 1mm I.D. quartz capillary
• Operation Conditions Pressure 10-2 mbar
• 
  Voltage 40 kV
• 
  Current 35 mA
• Running Time 4 hrs

2
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• Result

u1 0.5 wt u2 1.0 wt u3 2.5 wt u4 5.0 wt
a. u.
The slope of 4 in the Porod region could be an
indication that the particle is spherical.
Scattering Vector (A-1)
3
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• Guinier Plot

F(h) scattered intensity h scattering
vector R0 radius of gyration
A-2
4
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• Radius of Gyration

5
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• Polydispersity System

h Scattering vector D(R) Particle size
distribution P(hR) Form factor (spherical shape
is used) v0(R) volume of the spherical
particle S(R) Structure factor (Percus-Yevick
approximation is used)
6
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• 0.5 wt

A-1
7
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• 1.0 wt

A-1
8
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• 2.5 wt

A-1
9
Particle Sizing- Small Angle X-ray Scattering

• Sealed-Tube Source

• 5.0 wt

A-1
10
Particle Sizing- Small Angle X-ray Scattering

• Rotating Anode Source

• Experimental Conditions
• Sample 1 wt
• Ludox HS-40 (Dupont Product,
  Aldrich Chemical Co.,)
• Preparation Dilute with deionized water
• Sonicate for 5 mins
  before loading into the sample holder
• Sample Holder 1mm I.D. quartz capillary
• Operation Conditions Pressure 10-2 mbar
• 
  Voltage 45 kV
• 
  Current 90 mA
• Running Time 5 mins

11
Particle Sizing- Small Angle X-ray Scattering

• Rotating Anode Source

u1(h) 1.0 wt Ludox Sample from
sealed tube machine u2(h) 1.0 wt Ludox Sample
from rotating anode machine
A-1
12
Particle Sizing- Small Angle X-ray Scattering

• Rotating Anode Source

u1(h) 1.0 wt Ludox Sample from
sealed tube machine u2(h) 1.0 wt Ludox Sample
from rotating anode machine
A-2
13
Particle Sizing- Small Angle X-ray Scattering

• Rotating Anode Source