Quantitative Analysis of Gold Nano-aggregates by Combining Electron and Probe Microscopy Techniques

Borghi, Francesca; Mirigliano, Matteo; Milani, P.; Podestà, Alessandro

doi:10.1007/978-3-030-01629-6_7

Cited by 5 publications

(12 citation statements)

References 21 publications

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“…2c). 29,30 We underline the fact that the grain distribution nearly perfectly overlaps to that of the sub-monolayer lm, thus suggesting that no signicant grain growth is present even for very high thickness and that the nanoscale building blocks retain their individuality as reported in previous investigations. [31][32][33] This is at odd to what observed for the growth of gold lms assembled by atoms: in this case the grain size increases linearly as lms become thicker.…”

Section: Resultssupporting

confidence: 75%

“…Only globular objects from AFM images have been selected for the analysis of the cluster heights, by applying filtering selection criteria described in ref. 29 and 30 .…”

Section: Methodsmentioning

confidence: 99%

“…The gold samples with the lowest coverage have been analyzed in order to characterize the size distribution of the incident clusters using a complementary approach and analysis based on SEM and AFM. 29 …”

Section: Methodsmentioning

confidence: 99%

“…This is the most critical step 29 because of the resolution of nm per pixels and the error that can be introduced due to a wrong segmentation of an object on the image background with the presence of artefacts. 29 It is a good practice to examine the trend of the pixel value histogram to understand if there is a preferred method to set the threshold to binarize an image. 58 A comparison between several thresholding methods is realized: a local adaptive method (see adaptthresh in MATLAB), the Otsu's method, 59 a global one (using rst order statistic, computing the global mean value of the image pixels) and a manual thresholding with the AFM soware; 29 in this way it was possible to estimate the errors in measured values due to the pixel resolution or the different weights that carry some image characteristics, like the contrast or the homogeneity of the luminosity, affecting the segmentation of the image.…”

Section: Analysis Of Sem Imagesmentioning

confidence: 99%

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Non-ohmic behavior and resistive switching of Au cluster-assembled films beyond the percolation threshold

et al. 2019

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Section: Resultssupporting

confidence: 75%

“…Only globular objects from AFM images have been selected for the analysis of the cluster heights, by applying filtering selection criteria described in ref. 29 and 30 .…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Analysis Of Sem Imagesmentioning

confidence: 99%

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Non-ohmic behavior and resistive switching of Au cluster-assembled films beyond the percolation threshold

et al. 2019

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“…The estimation of the geometrical properties of the objects identified as IL droplets on the gold surface by optical investigation, has been carried out by converting optical images into grayscale maps, and by defining a gray threshold for the binarization of the image. According to the method explained in Refs (Borghi et al, 2018;Mirigliano et al, 2019), a thresholding method was chosen to perform a segmentation of the images: all the values below the chosen level are approximated with 0 (the gold substrate), while the others with 1 (ionic liquid droplets).…”

Section: Optical Characterizationmentioning

confidence: 99%

Nanostructure Determines the Wettability of Gold Surfaces by Ionic Liquid Ultrathin Films

et al. 2021

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Ionic liquids are employed in energy storage/harvesting devices, in catalysis and biomedical technologies, due to their tunable bulk and interfacial properties. In particular, the wettability and the structuring of the ionic liquids at the interface are of paramount importance for all those applications exploiting ionic liquids tribological properties, their double layer organization at electrified interfaces, and interfacial chemical reactions. Here we report an experimental investigation of the wettability and organization at the interface of an imidazolium-based ionic liquid ([Bmim][NTf2]) and gold surfaces, that are widely used as electrodes in energy devices, electronics, fluidics. In particular, we investigated the role of the nanostructure on the resulting interfacial interactions between [Bmim][NTf2] and atom-assembled or cluster-assembled gold thin films. Our results highlight the presence of the solid-like structured ionic liquid domains extending several tens of nanometres far from the gold interfaces, and characterized by different lateral extension, according to the wettability of the gold nanostructures by the IL liquid-phase.

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Soft Electronic Switches and Adaptive Logic Gates Based on Nanostructured Gold Networks

Nadalini,

Dallinger,

Sottocorno

et al. 2024

Adv Elect Materials

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The advent of neuromorphic substrates is promoting the development of in materia autonomous and adaptive devices, employed as hardware solutions to reduce the current inefficiencies of traditional data processing techniques, in terms of energy requirements. The integration of data processing capabilities on soft materials is here focused on the development of the edge computing paradigm of interest for soft robotics and wearable devices. For such purposes, gold nanostructured complex networks produced in the gas phase are employed to fabricate neuromorphic devices. The integration of the latter on a soft Polydimethylsiloxane (PDMS) substrate equipped with stretchable laser‐induced graphene electrodes, is exploited for the production of in materia devices to bridge the gap between data processing and interaction with the environment. The description and the control of the non‐linear, resistive switching electrical properties are demonstrated by the development of soft mechano‐responsive electronic switches and soft reconfigurable logic gates. These preserve Boolean functions classifications even under small mechanical perturbations, thanks to the redundant and adaptive connectivity of the gold networks. These results constitute a promising starting point for a fruitful combination of physical and computing intelligence directly integrated on soft systems to efficiently interact with the surrounding scenario.

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Quantitative Analysis of Gold Nano-aggregates by Combining Electron and Probe Microscopy Techniques

Cited by 5 publications

References 21 publications

Non-ohmic behavior and resistive switching of Au cluster-assembled films beyond the percolation threshold

Non-ohmic behavior and resistive switching of Au cluster-assembled films beyond the percolation threshold

Nanostructure Determines the Wettability of Gold Surfaces by Ionic Liquid Ultrathin Films

Soft Electronic Switches and Adaptive Logic Gates Based on Nanostructured Gold Networks

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