Ag–Al2O3 optical nanocomposites with narrow particle size distribution prepared by pulsed laser deposition

Lambert, M. E.; May, Alexander; Akkan, Cağrı Kaan; Agarwal, Nisha Rani; Aktas, Oral Cenk

doi:10.1016/j.matlet.2014.08.131

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…The OAD technique was applied to facilitate the metal pillar formation and to avoid the agglomeration of metal particles in the oxide matrix. [35][36][37][38] The Li The discontinuity observed in some of the Au pillars was attributed to the shadowing effect from the OAD growth. In this case, the small Au nanorods near the film-substrate interface are Au nucleates formed at the beginning stage of the growth that are shadowed by nearby taller pillars and stopped growing.…”

Section: Enhanced Current Collector Within Cathodementioning

confidence: 99%

“…The OAD technique was applied to facilitate the metal pillar formation and to avoid the agglomeration of metal particles in the oxide matrix. [35][36][37][38] The Li 2 MnO 3 -Au VAN film was deposited from a single target containing both materials on Al 2 O 3 single crystalline substrates for structural analysis, as well as on stainless steel substrates buffered with Au for electrochemical measurements. The crystallographic analysis of the The discontinuity observed in some of the Au pillars was attributed to the shadowing effect from the OAD growth.…”

Section: Enhanced Current Collector Within Cathodementioning

confidence: 99%

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Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Cunha

Huijben

2021

MRS Bulletin

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Planar two-dimensional (2D) solid-state lithium-ion batteries exhibit an undesirable energy versus power balance, which can be dramatically improved by the application of three-dimensional (3D) geometries. Current ceramics-based nanocomposites exhibit limited control of the distribution and orientation of the nanoparticles within the matrix material. However, the tailoring of functionalities by the strong coupling between the two phases and their interfaces, present in epitaxial 3D vertically aligned nanocomposites (VANs), show promising advantages over the conventional 2D planar multilayers. Although a range of epitaxial VANs have been studied in the last decade, lithium-based VANs toward battery applications have remained mostly unexplored. Interestingly, two recent studies by Qi et al. and Cunha et al. demonstrate the unique potential of lithium-based VANs toward the realization of 3D solid-state batteries with enhanced energy storage performance. In this article, we will discuss these promising results as an enhanced current collector within the cathode or as an integrated solid-state cathode-electrolyte composite. Furthermore, we will describe different design configurations that can be applied to realize self-assembled VAN-based complete 3D battery devices.

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Section: Enhanced Current Collector Within Cathodementioning

confidence: 99%

Section: Enhanced Current Collector Within Cathodementioning

confidence: 99%

Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Cunha

Huijben

2021

MRS Bulletin

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“…Metals embedded in ceramic or dielectric matrices have been demonstrated in thin-film optical applications ranging from optoelectronic devices, optical filters, super-resolution optical imaging, solar selective absorption coatings, miniaturized metallic waveguides, to optical sensing devices. − A mixed materials approach is likely the basis of electronic and optoelectronic transparent conductive oxides such as indium tin oxide, niobium zinc oxide, or aluminum zinc oxide. − Additionally, similar hybrid optical material tailoring is the appeal of complex mixed-valent oxides such as Nb x Mo y O z or Mo x Ge y O z . ,, In the case of nano- and microstructured inhomogeneous material mixing, metal–dielectric hybrid films present the ability to engineer controlled structurally dependent light–matter interactions at reduced film thickness dimensions. For example, mixed metal-oxide M x Si y O z (where M is a transition metal) thin films have been shown to yield tailored compositional–structural coloration for ophthalmic lenses .…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Optical Properties of Nanoscale-Thick Metal–Dielectric Ag–SiO₂ Nanocomposite Films for Precision Optical Coating Integration

Sun

Grant

Jones

et al. 2023

ACS Appl. Nano Mater.

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Thin-metal films can be challenging to process at ultrathin thicknesses (≲10 nm) due to poor wetting (or surface tension compatibility) at dielectric interfaces. Typical thickness dimensions required to induce the onset of coalescence is usually ≳20 nm. Films <20 nm in thickness can result in non-ideal process-dependent film uniformity and morphology that prevent controlled and repeatable ultrathin-film optical properties and behavior. Such thickness limitations undesirably constrain the design and integration of thin-metal films into high-precision multilayer optical coatings (e.g., narrow bandpass filters and induced transmission filters). The co-sputtering of nanocomposite metal–dielectric films offers an appealing route toward ultrathin film coalescence and tailorable optical properties to achieve high-precision optical performance at significantly reduced film thicknesses (e.g., as compared to conventional all-dielectric multilayer optical media). In this work, silver (Ag) nanoparticles and contiguous Ag networks embedded in a silicon dioxide (SiO2) matrix were prepared at ambient substrate temperature via magnetron co-sputtering in a controlled pure argon atmosphere. We show that the structural features and optical properties of nanocomposite Ag–SiO2 films can be manipulated by varying the co-sputtering duration at ∼3–10 nm film thicknesses. Here, the Ag material phase ranges in structure from dispersed nanoparticles to contiguous partially coalesced networks. A distinct optical response transition occurs upon Ag phase transition from nanoparticles to the partially coalesced network. Large differences in the measured optical intensity are observed at these reduced film thicknesses: maximum ΔT = 67%, ΔR = 28%, and ΔA = 46% in the visible and near-infrared regions. Overall, our work shows the tailoring of ultrathin-metal-film optical properties (i.e., the refractive index, n, and extinction coefficient, k) and is expected to provide implementable methodologies toward the design, deposition, and integration of next-generation complex index multilayer optical filters and mirrors exhibiting enhanced precision spectral performance.

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“…Compared to other techniques, such as chemical vapor deposition (CVD) [5], molecular beam epitaxy (MBE) [6], sol-gel synthesis [7] and pulsed laser deposition [8], ion implantation has several important advantages, including no synthesis-related impurities and precise control of the introduced metal ions and their depth distribution in the dielectric matrix [9]. Accordingly, nanoparticles of metals and metal oxides, such as copper (Cu) [10], gold (Au), nickel (Ni) [11], silver (Ag) [12], cobalt (Co) [13], etc., were synthesized by ion implantation in dielectrics such as SiO 2 [14], Al 2 O 3 [15], and even in MgO [16,17] or CeO 2 [13].…”

Section: Introductionmentioning

confidence: 99%

Influence of Annealing on the Dielectric Properties of Zn-SiO2/Si Nanocomposites Obtained in “Hot” Implantation Conditions

et al. 2022

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This paper presents the results of AC electrical measurements of Zn-SiO2/Si nanocomposites obtained by ion implantation. Implantation of Zn ions was carried out into thermally oxidized p-type silicon substrates with energy of 150 keV and fluence of 7.5 × 1016 ion·cm−2 at a temperature of 773 K, and is thus called implantation in “hot” conditions. The samples were annealed in ambient air for 60 min at 973 K. Electrical measurements of Zn-SiO2/Si nanocomposites were carried out before and after annealing. Measurements were performed in the temperature range from 20 K to 375 K. The measurement parameters were the resistance Rp, the capacitance Cp, the phase shift angle θ and the tangent of loss angle tanδ, as a function of the frequency in the range from 50 Hz to 5 MHz. Based on the characteristics σ(f) and the Jonscher power law before and after sample annealing, the values of the exponent s were calculated depending on the measurement temperature. Based on this, the conductivity models were matched. Additionally, the real and imaginary parts of the dielectric permittivity were determined, and on their basis, the polarization mechanisms in the tested material were also determined.

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Ag–Al2O3 optical nanocomposites with narrow particle size distribution prepared by pulsed laser deposition

Cited by 7 publications

References 16 publications

Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Tailoring the Optical Properties of Nanoscale-Thick Metal–Dielectric Ag–SiO₂ Nanocomposite Films for Precision Optical Coating Integration

Influence of Annealing on the Dielectric Properties of Zn-SiO2/Si Nanocomposites Obtained in “Hot” Implantation Conditions

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Ag–Al2O3 optical nanocomposites with narrow particle size distribution prepared by pulsed laser deposition

Cited by 7 publications

References 16 publications

Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Lithium-based vertically aligned nanocomposites for three-dimensional solid-state batteries

Tailoring the Optical Properties of Nanoscale-Thick Metal–Dielectric Ag–SiO2 Nanocomposite Films for Precision Optical Coating Integration

Influence of Annealing on the Dielectric Properties of Zn-SiO2/Si Nanocomposites Obtained in “Hot” Implantation Conditions

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Tailoring the Optical Properties of Nanoscale-Thick Metal–Dielectric Ag–SiO₂ Nanocomposite Films for Precision Optical Coating Integration