Nanopatterning Soluble Multifunctional Materials by Unconventional Wet Lithography

Cavallini, Massimiliano; Albonetti, Cristiano; Biscarini, Fabio

doi:10.1002/adma.200801979

Cited by 135 publications

(98 citation statements)

References 84 publications

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“…For this purpose, the softlithographic techniques provide means to accurately tailor the nanostructure of the materials. [18][19][20][21] Laser scanning is a softlithographic technique widely used to modify the shape and structure of metal nanoparticles. [21][22][23][24] Surface modifi cation can be easily achieved by in situ [ 21 ] or ex situ [22][23][24] pulsed laser treatment in the case of random systems of MNPs.…”

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confidence: 99%

Selective Dichroic Patterning by Nanosecond Laser Treatment of Ag Nanostripes

et al. 2010

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The strong absorption of light [ 1 ] and the local amplifi cation of the electromagnetic fi eld [ 2 ] at the plasmon resonance of noble metal nanostructures have been the focus of hundreds of studies due to their practical applications for the fabrication of optical devices such as fi lters, non-linear optical components, or Raman enhancers. [ 3,4 ] The control of the plasmon features such as spectral width, [ 5 ] position, [ 6 ] and shape [ 7 ] can be accomplished by different physical deposition routes [8][9][10][11][12] providing adequate growing conditions of metal nanoparticles (MNPs). Pioneer works in the 1990s showed the optical selectivity of elongated Ag deposits on SiO 2 with applications as optical fi lters for windows to control solar heat gain and glare, among others. [ 13 ] Recently, assemblies of parallel stripes of MNPs have been fabricated onto preformed surfaces presenting a 1D periodic roughness [ 14 , 15 ] or bundled SiO 2 nanocolumns. [ 16 , 17 ] A signifi cant macroscopic optical dichroism has been reported for these systems that can be useful for the development of polarized light emitters or materials with an enhanced IR luminescence because of the excitation of two distinct plasmon resonances in the directions parallel (longitudinal mode) and perpendicular (transverse mode) to the stripes. [ 18 ] Architecture control of the metal assemblies plays a determinant role in the functional properties of the material. For this purpose, the softlithographic techniques provide means to accurately tailor the nanostructure of the materials. [18][19][20][21] Laser scanning is a softlithographic technique widely used to modify the shape and structure of metal nanoparticles. [21][22][23][24] Surface modifi cation can be easily achieved by in situ [ 21 ] or ex situ [22][23][24] pulsed laser treatment in the case of random systems of MNPs. In contrast, nothing has been reported about the effect of a pulsed laser on the structure and optical dichroism of autoorganized metal nanostructures. In this paper we show that nanosecond (ns) laser irradiation can be effectively used to control the optical dichroism of Ag stripes supported on SiO 2 nanocolumns (NCs). This dichroism can be effectively tailored along the full visible range. Thus, we propose the utilization of the AgNPs/SiO 2 NCs structures for writing dichroic patterns at the microscale with potential applications for encryption and data storage purposes.AgNPs/SiO 2 NCs fi lms were grown by a two-step process.[ 17 ]First, SiO 2 thin fi lms were deposited by glancing angle vapor deposition (GLAD) with a tilted columnar nanostructure and ≈ 350 nm thickness (see Figure S1a in the Supporting Information and the Experimental Section). [ 25 , 26 ] These structures present an anisotropic surface topography known as "bundling", [ 17 ] consisting of the coalescence of the NCs along the x -direction ( Figure S1b). The silver nanoparticles were then grown by DC sputtering at room temperature. The "bundled" SiO 2 NCs act as a template for the fabrication of Ag...

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confidence: 99%

Selective Dichroic Patterning by Nanosecond Laser Treatment of Ag Nanostripes

et al. 2010

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“…The fi lling speed is proportional to the cross-sectional dimensions of the channel and inversely proportional to the length of the channel containing the liquid and to the viscosity of the liquid. [ 114 ] After complete solvent evaporation or, in case of a low-viscosity polymer precursor after crosslinking, the stamp is removed leaving the patterns on the substrate.…”

Section: Micromolding In Capillaries (Mimic)mentioning

confidence: 99%

Fabrication of Transistors on Flexible Substrates: from Mass‐Printing to High‐Resolution Alternative Lithography Strategies

2012

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In this report, the development of conventional, mass-printing strategies into high-resolution, alternative patterning techniques is reviewed with the focus on large-area patterning of flexible thin-film transistors (TFTs) for display applications. In the first part, conventional and digital printing techniques are introduced and categorized as far as their development is relevant for this application area. The limitations of conventional printing guides the reader to the second part of the progress report: alternative-lithographic patterning on low-cost flexible foils for the fabrication of flexible TFTs. Soft and nanoimprint lithography-based patterning techniques and their limitations are surveyed with respect to patterning on low-cost flexible foils. These show a shift from fabricating simple microlense structures to more complicated, high-resolution electronic devices. The development of alternative, low-temperature processable materials and the introduction of high-resolution patterning strategies will lead to the low-cost, self-aligned fabrication of flexible displays and solar cells from cheaper but better performing organic materials.

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“…The numbers following F and H refer to the alkyl chain lengths of the perfluorocarbon and hydrocarbon, respectively, while A indicates the presence of a carboxylic group. Stearic acid H17A was purchased from Fluka, while 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19-heptadecafluorononadecanoic acid C 8 F 17 -C 10 H 20 COOH F8H10A was purchased from Wako Pure Chemicals Industries, Ltd. Hexane and tetrahydrofuran THF , which were used as spreading solvents, were of spectroscopic grade and were purchased from Dojindo and Wako Pure Chemical Industries, Ltd., respectively. Hydrogen tetrachloroaurate tetrahydrate, which is a metal precursor, and rhodamine B were purchased from Wako Pure Chemical Industries, Ltd. Methanol was of spectroscopic grade and purchased from Dojindo.…”

Section: Methodsmentioning

confidence: 99%