Table 2 XRD crystallite sizes calculated from Sherrer’s equation.

From: CTAB modified SnO₂ PEDOT PSS heterojunction humidity sensor with enhanced sensitivity stability and machine learning evaluation

Material

Miller Indices (h, k, l)

2θ (°)

θ (Radians)

β (°)

β (Radians)

d-Spacing (Å)

D (nm)

ε

δ (nm− 2)

SnO-1

1 1 0

51.9

0.233

1.470

0.0256

3.34

12.2

0.0278

0.0067

SnO-2

1 0 1

33.7

0.296

1.295

0.0226

2.65

9.5

0.0197

0.0111

SnO-3

2 1 1

26.6

0.452

1.277

0.0223

1.76

7.3

0.0132

0.0188

SnO-4

3 0 1

65.8

0.575

1.727

0.0301

1.46

6.1

0.0130

0.0269

SnO-5

3 2 1

78.6

0.686

2.490

0.0419

1.41

4.8

0.0149

0.0434

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