Journal
NANO LETTERS
Volume 15, Issue 12, Pages 8008-8012Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04011
Keywords
Small-angle X-ray scattering; small-angle neutron scattering dendrimer; self-assembly; superlattice; gold nanoparticles
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Funding
- CNRS-UPENN-SOLVAY through the Complex Assemblies of Soft Matter Lab. (COMPASS)
- Penn's NSF MRSEC [DMR-112090]
- nSoft Consortium
- DANSE project under NSF [DMR-0520547]
- ANR [12BS10-003]
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Small-angle X-ray and neutron scattering provide powerful tools to selectively characterize the inorganic and organic components of hybrid nanomaterials. Using hydrophobic gold nanoparticles coated with several commercial and dendritic thiols, the size of the organic layer on the gold particles is shown to increase from 1.2 to 4.1 nm. A comparison between solid-state diffraction from self-assembled lattices of nanoparticles and the solution data from neutron scattering suggests that engineering softness/deformability in nanoparticle coatings is less straightforward than simply increasing the organic size. The dendritic effect in which higher generations yield increasingly compact molecules explains changes in the deformability of organic ligand shells.
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