TABLE 1.

Summary of the parameters describing the modified quartz substrate obtained from fitting the measured x-ray reflectivity data shown in Fig. 1

	Quartz		Chromium			Gold
	e− Density* [e− Å−3]	σ† [Å]	e− Density* [e− Å−3]	τ‡ [Å]	σ† [Å]	e− Density* [e− Å−3]	τ‡ [Å]	σ† [Å]
Before	0.79 (±0.1)	2.8	1.88 (±0.06)	27.3 (±1.1)	5.2	4.11 (±0.11)	117.4 (±1.5)	3.2
After	0.79 (±0.1)	3.1	2.03 (±0.10)	26.0 (±2.3)	5.3	4.35 (±0.13)	119.2 (±1.7)	3.4

The theoretical electron densities of Quartz, Cr, and Au are 0.79, 1.97, and 4.36 respectively.

^*Electron density.

^†Roughness of the layer.

^‡Thickness of layer.