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| 100 | 1 | _ | |a Shi, Li |0 P:(DE-H253)PIP1013647 |b 0 |
| 245 | _ | _ | |a Gold Nanoparticle–Polyelectrolyte Complexes with Tunable Structure Probed by Synchrotron Small-Angle X-ray Scattering: Implications for the Production of Colloidal Crystals-Based Nanophotonic Materials |
| 260 | _ | _ | |a Washington, DC |c 2023 |b ACS Publications |
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| 520 | _ | _ | |a Close-packed colloidal crystals of gold nanoparticles (AuNPs) are of great interest in the field of nanophotonics due to their lattice-pattern-dependent optical properties. One challenge resides in producing such crystalline assemblies by a scalable approach involving polydisperse AuNPs obtained by standard synthesis routes and structuring natural molecules in water at room temperature. Electrostatic complexation between functionalized AuNPs and oppositely charged polyelectrolytes (PELs) is a very simple way to create AuNP self-assemblies of different morphologies and compactness. Our work investigates, using synchrotron small-angle X-ray scattering, their structure as a function of concentration, PEL persistence length and ionic strength. By decreasing the radius, R, of the positively charged gold nanoparticles to a few nm (R ≤ 3 nm) and increasing the polyelectrolyte persistence length, $L_T$, substituting flexible sodium polystyrenesulfonate for natural semiflexible hyaluronan, we tuned the characteristic ratio $L_T$/R up to values of ≥1.85. Such ratios allow the successful formation of a new AuNPs arrangement with a high degree of short-range order at low ionic strength and of crystalline order when interactions are screened by addition of salt. This approach involving commercially available natural water-soluble semiflexible PELs, opens a low-cost and promising way for the one-step production of gold colloidal crystals, which can be of ubiquitous utility in nanophotonics. |
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| 700 | 1 | _ | |a Carn, Florent |0 P:(DE-H253)PIP1013950 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Boué, François |0 P:(DE-H253)PIP1013947 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Buhler, Eric |0 P:(DE-H253)PIP1013948 |b 3 |e Corresponding author |
| 773 | _ | _ | |a 10.1021/acsanm.3c00259 |g Vol. 6, no. 5, p. 3990 - 4004 |0 PERI:(DE-600)2916552-0 |n 5 |p 3990 - 4004 |t ACS applied nano materials |v 6 |y 2023 |x 2574-0970 |
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