Quantifying "Softness" of Organic Coatings on Gold Nanoparticles using Correlated Small-Angle X-Ray and Neutron Scattering

Published

December 9, 2015

Author(s)

Benjamin T. Diroll, Kathleen Weigandt, Davit Jishkariani, Matteo Cargnello, Ryan J. Murphy, Lawrence A. Hough, Christopher B. Murray, Bertrand Donnio

Abstract

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 nm 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 that 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.

Citation

Nano Letters

Volume

15

Issue

12

Pub Type

Journals

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Citation

Diroll, B. , Weigandt, K. , Jishkariani, D. , Cargnello, M. , Murphy, R. , Hough, L. , Murray, C. and Donnio, B. (2015), Quantifying "Softness" of Organic Coatings on Gold Nanoparticles using Correlated Small-Angle X-Ray and Neutron Scattering, Nano Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919641 (Accessed April 25, 2024)