Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Ruffino, F.; Torrisi, V.; Marletta, Giovanni; Grimaldi, M. G.

doi:10.1063/1.4771686

Cited by 12 publications

(12 citation statements)

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“…It is known that metallic nanoparticles and submicron structures over a large area can be prepared via the dewetting of a thin solid metal film on a poorly wetting flat substrate. , Ruffino et al reported the formation of Au nanostructures via the dewetting of Au nanofilms on PMMA substrates. Considering the potential applications of surface structures on PMMA substrates in the patterning of metal films for plasmonics and flexible electronics, the temporal evolution of the pillars formed on PMMA [poly(methyl methacrylate)] films between two parallel plates under the action of an electric field is investigated.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Field-Induced Surface Patterns on PMMA

et al. 2016

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A simple model was developed to analyze the growth of a liquid pillar under the action of an electric field between two parallel electrodes. A quadratic relationship between time and the diameter of the pillar was obtained. The diameter of the pillar increases with time. Large electric field assists the growth of the liquid pillar, while a liquid with a large viscosity hinders the growth of the liquid pillar. The field-induced formation and growth of PMMA pillars on PMMA films were observed using the configuration of a parallel capacitor. Pillars of larger sizes and smaller densities were formed on thicker PMMA films than on thinner PMMA films. The root-mean-square ( https://en.wikipedia.org/wiki/Root_mean_square ) diameter of the pillars increases with the increase of the annealing time and annealing temperature. The growth behavior of the pillars can be described by an Arrhenius relation with an activation energy of 24.4 kJ/mol, suggesting that the growth of the pillars is controlled by a thermal activation process.

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Section: Introductionmentioning

confidence: 99%

Kinetics of Field-Induced Surface Patterns on PMMA

et al. 2016

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. For example, metal nanoparticles (NPs), such as Au and Ag, on conductive transparent substrates show interesting optical properties exhibiting structure-dependent transmission/absorption spectra due to localized surface plasmon resonances [8][9][10][11][12]. On the other hand, for example, Pd and Pt NPs on functional substrates, are particularly interesting due to their catalytic activity in several important chemical reactions on surfaces [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on the Molten-Phase Dewetting Characteristics of AuPd Alloy Films on Topographically-Structured Substrates

Ruffino¹

2017

Metals

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AuPd nanoparticles are formed on fluorine-doped tin oxide (FTO) by a nanosecond laser irradiation-induced dewetting process of deposited AuPd films. In particular, we analyze the effect of the surface topography of the substrate on the dewetting process and, so, on the final mean size of the formed nanoparticles. In fact, we used two supporting FTO substrates differing in the surface topography: we used a FTO layer which is un-intentionally patterned since it is formed by FTO pyramids randomly distributed on the glass slide as result of the deposition process of the same FTO layer, namely substrate A. We used, also, a further FTO substrate, namely substrate B, presenting, as a result of a chemical etching process, a higher roughness and higher mean distance between nearest-neighbor pyramids with respect to substrate A. The results concerning the size of the obtained AuPd NPs by the laser irradiations with the laser fluence fixed shows that the substrate topography impacts on the dewetting process. In particular, we found that below a critical thickness of the deposited AuPd film, the NPs formed on substrates A and B have similar size and a similar trend for the evolution of their size versus the film thickness (i.e., the dewetting process is not influenced by the substrate topography since the film does not interact with the substrate topography). On the other hand, however, above a critical thickness of the deposited AuPd film, the AuPd NPs show a higher mean size (versus the film thickness) on substrate B than on substrate A, indicating that the AuPd film interacts with the substrate topography during the dewetting process. These results are quantified and discussed by the description of the substrate topography effect on the excess of chemical potential driving the dewetting process.

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“…Using thermal-induced dewetting of Au nanolms on poly(methyl methacrylate) underlying layers, Ruffino et al 25 constructed Au nanostructures on PMMA lms. Considering the progress in exible electronics and the potential applications of metallic surface structures on polymer substrates in automobile and aerospace, the eld-induced formation and growth of pillars on BPAPC (bisphenol-A-polycarbonate) lms between two parallel plates is investigated.…”

Section: Introductionmentioning

confidence: 99%

Field-induced formation and growth of pillars on films of bisphenol-A-polycarbonate

et al. 2017

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An electric field is used to construct pillars on films of bisphenol-A-polycarbonate (BPAPC) between two parallel electrodes. Both the size and density of the pillars are dependent on the film thickness. For the same experimental conditions, thicker films will lead to the formation of pillars of larger sizes and smaller densities. The time dependence of the average diameter of the pillars is found to be a linear function of the square root of the difference between the annealing time and incubation time. The temperature dependence of the temporal evolution of the pillars follows the Arrhenius relation with an activation enthalpy of 121.5 kJ mol À1 . Increasing the film thickness and electric field intensity leads to the decrease of the characteristic wavenumber for the surface patterns at the same annealing temperature. There is a larger change in the film thickness for a thinner film than that of a thicker film after the formation of pillars under the same experimental conditions.

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Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Cited by 12 publications

References 80 publications

Kinetics of Field-Induced Surface Patterns on PMMA

Kinetics of Field-Induced Surface Patterns on PMMA

Experimental Analysis on the Molten-Phase Dewetting Characteristics of AuPd Alloy Films on Topographically-Structured Substrates

Field-induced formation and growth of pillars on films of bisphenol-A-polycarbonate

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