Nanopatterning by solid-state dewetting on reconstructed ceramic surfaces

Abstract

Articles you may be interested inPatterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

The process of solid-state dewetting of Au thin films studied by in situ scanning transmission electron microscopy

“…The figures show images obtained at different times during the in situ heating experiments. The complete data sets are presented as supplementary movies (M1- 12). Specific experiments at intermediate temperatures were performed twice.…”

“…Approaches include pre-patterning the substrate [10][11][12][13][14][15] or the thin film [16][17][18][19] and the introduction of a sacrificial layer [20,21]. Applications of the produced particle arrays are envisaged to range from templates for the growth of nanostructures [22,11,23,24], magnetic storage arrays [25,26], optical sensors [27,28] and plasmonic systems [29,30], over photocatalytic reactors [31] to plasmon-enhanced back reflectors in solar cells [32,33].…”

“…In the past, in situ TEM has been limited to qualitative observations of the dewetting process due to shortcomings in instrumentation, e.g. the study on freestanding Cu foil edges by Hackney et al [54], the study on Au thin films on patterned alumina substrates by Basu et al [12] and the study on Ni thin films on SiO 2 in cross section by Thron et al [55]. Other studies quantitatively evaluate the dewetting process but lack the ability to resolve it temporally, for example the in situ scanning transmission electron microscopy (STEM) and electron diffraction study on AgCu thin films on a carbon support by Chen et al [56].…”

Direct-Write Dewetting of High Melting Temperature Metals on Flexible Substrates

“…Solid metallic thin films are metastable depending on the choice of substrate and will often require additional energetic input before dewetting is observed [12]. This can involve raising the system temperature past the melting point of the metal; however, dewetting has also been observed in films while they were in the solid phase and at room temperature (~20 • C) [13][14][15]. Past studies have shown that the dewetting of metallic films can be induced by the use of a laser input from both defocused and focused sources [16][17][18].…”

Metal Nanostructures on Ceramic Surfaces for Energy Applications

“…Nanostructured metals or ceramics on nanostructures have already been observed in several systems, e.g., Au-catalyzed growth of nanowires [3] or the chemical attachment of CdSe quantum dots on ZnO nanorods for solar cell application [4]. For larger more controlled arrays, site-specific placement of Au and Ag nanoparticles on reconstructed ceramic surfaces by parallel electron-beaminduced deposition technique [5] and metallic nanostructured pattern formation on reconstructed ceramic surfaces by dewetting [6] have also been demonstrated. The present paper reports the development of a new technique to deposit nanoscale catalyst particles on oxide nanocube supports for energy and environmental applications.…”