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• W2002163059 abstract "Photolysis of diazirine modified small (3.9 ± 0.9 nm) gold nanoparticles (AuNP) generates a reactive interfacial carbene that then reacts via an insertion reaction to covalently attach the AuNP onto glassy carbon (GC) electrodes. This yields GC surfaces that are densely and homogeneously functionalized with AuNP. The AuNP hybrid glassy carbon electrode has been characterised by atomic force microscopy (AFM), energy-dispersive X-ray spectroscopy (EDX), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The system is found to be robust to physical and electrochemical stresses due to the covalent bond between the AuNP and the surface formed through the carbene insertion reaction. The conductivity of the AuNP functionalized GC electrode is found to be similar to clean GC, and the AuNP serve to switch on electron transfer. The AuNP can be oxidatively desorbed from the electrode at surprisingly low potential (0.99 V). This yields a monolayer of insulator thiol/thiolate ligands that previously anchored the AuNP to the GC, which gives an interesting switch off effect of the electron transfer. We demonstrate that because the method is photoinitiated this methodology allows for spatial control and the AuNP, which can be photopatterned onto GC surfaces easily. The high stability, the good electrical conductivity, the facility of making patterns, and the ability to tune the physical and chemical properties of AuNP through its ligands, make this new functionalization method suitable for the development of sensors and electronic devices." @default.
• W2002163059 created "2016-06-24" @default.
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• W2002163059 date "2012-01-01" @default.
• W2002163059 modified "2023-10-17" @default.
• W2002163059 title "Electrochemistry of robust gold nanoparticle–glassy carbon hybrids generated using a patternable photochemical approach" @default.
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• W2002163059 doi "https://doi.org/10.1039/c2jm34984a" @default.
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