Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

Henley, Simon J.; Carey, J. D.; Silva, S. Ravi P.

doi:10.1103/physrevb.72.195408

Cited by 226 publications

(167 citation statements)

References 30 publications

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“…The method features rapid processing times in air or vacuum, allowing the raster scanning of large areas very fast, favorable for industrial production of OPVs on flexible substrates such as in roll-to-roll processes. 17 The ability to control the metal nanoparticle dimensions, 18 and the possibility to create alloy nano-particles 19 for tuning the surface plasmon resonance, linked with no chemical wastes, are distinct advantages of the process. Finally, nano-growth processes involving lasers are known for the excellent quality of produced nanostructures.…”

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confidence: 99%

Organic solar cells with plasmonic layers formed by laser nanofabrication

Beliatis

Henley

Han

et al. 2013

Phys. Chem. Chem. Phys.

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A method for the synthesis of metal nanoparticles coatings for plasmonic solar cells which can meet large scale industrial demands is demonstrated. A UV pulsed laser is utilized to fabricate Au and Ag nanoparticles on the surface of polymer materials which forms the substrates for plasmonic organic photovoltaic devices. Control of the particles' size and density is demonstrated. The optical and electrical effects of these embedded particles on the power

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mentioning

confidence: 99%

Organic solar cells with plasmonic layers formed by laser nanofabrication

Beliatis

Henley

Han

et al. 2013

Phys. Chem. Chem. Phys.

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“…Unlike many other fabrication methods, which include chemical synthesis [13], pulsed laser deposition [14], or thermal annealing [15], pulsed laser nanostructuring of thin metal films can be applied over large areas at low cost to fabricate supported nanoparticle surfaces. Henley et al [16] and Trice et al [17] studied the process for single metal films. Herein, we present the synthesis and characterization of metal alloy nanoparticles with tunable SPR by laser nanostructuring of Ag Au bi-layer films and discuss how the position of the maximum absorption affects the SERS efficiencies.…”

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confidence: 99%

Engineering the plasmon resonance of large area bimetallic nanoparticle films by laser nanostructuring for chemical sensors

2011

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Large area fabrication of metal alloy nanoparticles with tunable surface plasmon resonances, on low cost substrates is reported. A UV excimer laser was used to anneal 5nm thick Ag Au bilayer films deposited with different composition ratios to create alloy nanoparticles. These engineered surfaces are used to investigate how the wavelength of the surface plasmon resonance affects the optical detection capability of chemical species by Surface Enhanced Raman Spectroscopy.Metal nanoparticle films (MNFs) are attracting considerable attention in the fields of Raman biosensors[1, 2], gas sensors [3], solar cells [4,5] and light emitting diodes [6] due to enhancement in light coupling efficiency between the surface plasmons (SP) developed at the nanoparticles and the device.Use of metal alloy nanoparticles can optimize the surface effect of enhanced Raman scattering (SERS) by tuning their plasmon resonance absorption close to the laser frequency used to probe the Raman signal from molecules on their surface [7,8]. However, despite these attractive properties, challenges exist regarding large scale adoptation of plamonic nanoparticle surfaces. One of the major challenges in device fabrication is the production of uniform MNFs over large area substrates and repeatable tune-ability of their surface plasmon resonances (SPR). The maximum energy coupling in SERS coincides with the wavelength of the metal nanoparticles SPR and is localized at "hotspots" [7,9,10].Changes in the SPR optical absorption due to different composition of Ag and Au in alloy nanoparticles has been demonstrated previously [11,12]. The effect is attributed to the change in the dielectric function of the alloy nanoparticles from the volumetric contributions of Ag and Au. Unlike many other fabrication methods, which include chemical synthesis [13], pulsed laser deposition [14], or thermal annealing [15], pulsed laser nanostructuring of thin metal films can be applied over large areas at low cost to fabricate supported nanoparticle surfaces. Henley et al [16] and Trice et al [17] studied the process for single metal films. Herein, we present the synthesis and characterization of metal alloy nanoparticles with tunable SPR by laser nanostructuring of Ag Au bi-layer films and discuss how the position of the maximum absorption affects the SERS efficiencies.Corning glass substrates where cleaned in a ultrasonication bath for 10 min in acetone and blow dried with nitrogen. Metal films were deposited in two layers by evaporating silver and gold separately. The total film thickness was fixed at 5nm while the thickness of each individual layer was deposited according to (AgxAu5-x) where x = 1, 2, 3, 4, 5 in nm. The average deposition rate for all materials was 0.1 -0.2 Å/s and a pressure of 1.0 x 10 -6 Torr was maintained in the evaporation chamber during this process. A Lambda-Physik LPX 210i excimer laser operating at 248 nm, with a pulse duration of 25 ns was used for the rapid annealing. All the samples were mounted on X-Y translation stage moving at a typical ...

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“…Under these strongly confined conditions, the metal atoms are rapidly thermalized and a significant back deposition of metal atoms onto the substrate can occur as shown schematically in Figure 1. The synthesis concept is similar to those described elsewhere 19,22,23 allowing nanocluster formation in the area where the laser beam passes.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast to Laser Induced Forward Transfer (LIFT) 17,18 and other deposition methods, laser annealing of thin metal films (MFs) was shown to yield uniform localized MNFs directly on substrate surfaces [19][20][21] , suitable for industrial mass production.…”

Section: Introductionmentioning

confidence: 99%

Laser Ablation Direct Writing of Metal Nanoparticles for Hydrogen and Humidity Sensors

et al. 2010

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A UV pulsed laser writing technique to fabricate metal nanoparticle patterns on low-cost substrates is demonstrated. We use this process to directly write nano-particle gas sensors, which operate via quantum tunnelling of electrons at room temperature across the device. The advantages of this method are: no lithography requirements, high precision nanoparticle placement and room temperature processing in atmospheric conditions. Palladium based nanoparticle sensors are tested for the detection of water vapour and Hydrogen within controlled environmental chambers. The electrical conduction mechanism responsible for the very high sensitivity of the devices is discussed with regard to the inter-particle capacitance and the tunnelling resistance.2

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Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

Cited by 226 publications

References 30 publications

Organic solar cells with plasmonic layers formed by laser nanofabrication

Organic solar cells with plasmonic layers formed by laser nanofabrication

Engineering the plasmon resonance of large area bimetallic nanoparticle films by laser nanostructuring for chemical sensors

Laser Ablation Direct Writing of Metal Nanoparticles for Hydrogen and Humidity Sensors

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