Table 2. Structural parameters determined by GISAXS^a,b,c.

Samples	Bare AuNPs	DNA-AuNPs
Z1	9.0 ± 1.1	6.0 ± 1.4
D1 (Å)	99 ± 2	76 ± 2
Λ1/D1	0.2	0.2
Z2	8 ± 3	4.9 ± 1.2
D2/D1	1.8 ± 0.1	1.7 ± 0.1
Λ2/D1	0.2	0.3
Dcutoff/D1	2.0 ± 0.2	1.8 ± 0.3
Λcutoff/D1	0.4 ± 0.1	0.5 ± 0.1

^aInclusion of the parameter Z₃, D₃ and Λ₃ can improve the profile fitting, but is not essential.

^bThe data fitting is not sensitive to the parameter. Thus the 〈n〉 is allowed to vary in the 1.5 ± 0.5 × 10⁻⁴ Å⁻² range.

^cThe contribution of gas-like disorder is mainly restricted to low Q_xy regime. The larger the D_cutoff, the lower the Q_xy regime it dictates. So only the lower limit of the D_cutoff is considered in this study.