A Novel Strategy for Fabricating a Strong Nanoparticle Monolayer and Its Enhanced Mechanism.
作者： Jun Zhou , Xiaoqing Cao , Linlin Li , Xingcheng Cui , Yu Fu
DOI: 10.3390/NANO9101468
关键词: Nanoparticle 、 Self-assembly 、 Materials science 、 Membrane 、 Dithiol 、 Monolayer 、 Nanostructure 、 Transmission electron microscopy 、 Grazing-incidence small-angle scattering 、 Chemical engineering
摘要: This work presents the preparation of cross-linking Au nanoparticle (NP) monolayer membranes by thiol exchange reaction and their enhanced mechanical properties. Dithiol molecules were used as a mediator to connect adjacent nanoparticles replacing original alkanethiol ligand in monolayer. After cross-linking, membrane integrity was maintained no significant fracture observed, which is crucial for serving nanodevice. TEM (Transmission Electron Microscopy), UV-Vis absorption spectrum, GISAXS (grazing incidence small angle X-ray scattering) performed characterize nanostructure before after cross-linking. All results proved that interparticle distance controllably changed using dithiols different lengths agent. Moreover, modulus measured atomic force microscopy (AFM) result showed with longer dithiol molecule had larger modulus, might derive from unbroken intact structure due selected appropriately lengthed dithiol. study provides new way producing
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