Conductive Sub-micrometric Wires of Platinum-Carbonyl Clusters Fabricated by Soft-Lithography

Greco, Pierpaolo; Cavallini, Massimiliano; Stoliar, Pablo; Quiroga, Santiago David; Dutta, Soumya; Zacchini, Stefano; IAPALUCCI, M. C.; Morandi, Vittorio; Milita, Silvia; Merli, P. G.; Biscarini, Fabio

doi:10.1021/ja074104m

Cited by 69 publications

(59 citation statements)

References 28 publications

(30 reference statements)

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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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Selective Dichroic Patterning by Nanosecond Laser Treatment of Ag Nanostripes

et al. 2010

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“…Similarly, other nanoscale structures without strong asymmetry are often considered as "dots" (Burda et al 2005 ). The ultrathin nanowires would be the 1-D analogs of these nanomaterials (Greco et al 2008 ) and can be called ' nanorods '. The examples of 2-D nanostructures are the graphene molecular sheets of atomic thickness (Park and Ruoff 2009 ).…”

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confidence: 99%

Nanoscale Fluorescence Emitters

Demchenko

2015

Introduction to Fluorescence Sensing

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This chapter provides comparative analysis of properties of different nanoscale materials to absorb and emit visual and near-IR light with the focus on their applications in sensing and imaging technologies. Nowadays we observe that in these applications the novel nanoscale fl uorescent materials appear in strong competition with traditional organic dyes. They demonstrate diverse photophysical behavior and allow obtaining diverse information when they are incorporated into sensor composites or form the images in biological systems. Among these nanoscale emitters are the structures formed of organic dyes or by these dyes incorporated into different types of polymers with the resulting dramatically increased brightness. Collective excitonic effects appear when the aromatic units are coupled in conjugated polymers. Nanoscale structures formed of inorganic carbon in the form of nanodiamonds, graphene and graphene oxide pieces and the so-called carbon dots joined quite recently the family of fl uorophores. Semiconductor quantum dots present a range of bright emitters covering whole visible and near-IR spectral range. Finally, the up-converting nanocrystals make possible visible emission with near-IR excitation. Here we overview the most important features of these nanoscale materials. The following Chap. 6 will be focused on functional nanocomposites that allow extending the useful properties of these basic components.

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“…[23] Recently, several other applications of MIMIC, such as nanopatterning using different classes of materials, that is, metallic [24] and magnetic nanoparticles (NPs), [25] nanoclusters, [26] organic semiconductors, [27,28] and biomolecules, [29] have been proposed.…”

Section: Reviewmentioning

confidence: 99%

“…Conductive wires composed of platinum-carbonyl clusters with sub-micrometer width [32] have been fabricated by Greco et al [26] They also show the possibility to transform microwires made of platinum-carbonyl clusters into ordered arrays of conductive platinum wires. This example illustrates the concept and application of a single-step bottom-up process to deposit sizedefined stripes of a soluble molecular conductor.…”

Section: Nanoclustersmentioning

confidence: 99%

Nanopatterning Soluble Multifunctional Materials by Unconventional Wet Lithography

2009

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Molecular multifMolecular multifunctional materials have potential applications in many fields of technology, such as electronics, optics and optoelectronics, information storage, sensing, and energy conversion and storage. These materials are designed exhibit enhanced properties, and at the same time are endowed with functional groups that control their interactions, and hence self-organization, into a variety of supramolecular architectures. Since most of the multifunctional materials are soluble, lithographic methods suitable for solutions are attracting increasing interest for the manufacturing of the new materials and their applications. The aim of this paper is to highlight some of the recent advances of solution-based fabrication of multifunctional materials. We explain and examine the principles, processes, materials, and limitations of this class of patterning techniques, which we term unconventional wet lithographies (UWLs). We describe their ability to yield patterns and structures whose feature sizes range from nanometers to micrometers. In the following sections, we focus our attention on micromolding in capillaries, lithographically controlled wetting, and grid-assisted deposition, the most used methods demonstrated to lead to fully operating devices

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Conductive Sub-micrometric Wires of Platinum-Carbonyl Clusters Fabricated by Soft-Lithography

Cited by 69 publications

References 28 publications

Selective Dichroic Patterning by Nanosecond Laser Treatment of Ag Nanostripes

Selective Dichroic Patterning by Nanosecond Laser Treatment of Ag Nanostripes

Nanoscale Fluorescence Emitters

Nanopatterning Soluble Multifunctional Materials by Unconventional Wet Lithography

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